The book Casting Technology Hand Book  covers  Rules for Casting Design, Melting Furnaces and Refractories, Casting  Processes, Cast Irons, Various Types of Cast Steels, Production of Cast iron Castings, Production of Steel Castings.

RULES FOR CASTING DESIGN

Factors Affecting Casting Design
Fluid Life
Solidification Shrinkage
Type of Solidification
Volume
Slag/Dross Formation
Mechanical Factors
Common Design Rules

MELTING FURNACES AND REFRACTORIES

Cupola
Cold Blast Acid Lined Cupola
Construction of the cupola
Operational procedure
Metallurgical reactions
Importance of cupola well depth
Factors affecting the efficiency of cupola operation
Divided Blast Cupola
Cokeless Cupola
Hot Blast Cupola
Water Cooled Cupola
Use Oxygen in Cupolas
Rotary Furnace
Energy  Furnace
Energy Consumption and Heat Transfer
Induction Furnace
Types of Induction Furnace
Ramming materials
Cored Induction Furnace
Induction Furnace Lining
Vacuum Induction Melting
Arc Furnace Melting
Bridge Formation
Disadvantages of DRI
DC Arc Melting Furnace
Electrode breakages
Scrap mix up
Use of sponge iron/HBI
Advantages
Applications of Vacuum Metallurgy in Steel Melting
Introduction
Hydrogen
Nitrogen
Vacuum carbon dexidation
Fundamental Principles of Reactions Under Vacuum
Ladle Degassing by Argon Purging
Vacuum Arc Melting
Non-consumable electrode arc furnace
Consumable electrode vacuum arc process
VOD Process
AOD Process
Foundry Refractories
Classification of Refractories
Refractories for Non-ferrous Melting

CASTING PROCESS

Shell Process
Coating
Making Shell Cores/Moulds
Evaporative Pattern Casting Process
Centrifugal Casting
True Centrifugal Casting
Semi centrifugal Casting
Centrifuging
Investment Casting
Rapid Prototyping
Die Casting
Die Casting Methods
Cold Chamber Process
Low Pressure Die Casting
Cosworth Process
Squeeze Casting
Semi solid Metal Working Process
Technologies for Semi solid Metal processing
Rheocasting
Thixoforming
Rapid Solidification Processing

CAST IRONS

Introduction
Types of Cast Irons
Gray Cast Iron
Melting and Inoculation

VARIOUS TYPES OF CAST STEELS

Pearlitic Steels
Austenitic Manganese steel
Effect of Alloy Additions on Austenitic Manganese Steels
Effect of Process Parameters
Prevention of Failure
Stainless Steels
Austenitic Stainless Steels
Heat treatment
Martensitic Stainless Steels
Duplex Stainless Steels
Maraging Steels

PRODUCTION OF CAST IRON CASTINGS

Classification of cast Irons
Ceemical Composition Effect on structure and Properties
Carbon Equivalent
Silicon
Manganese
Slphur
Phosphorus
Other Minor and Alloying Elements
Types of Graphite
Graphite Size
Metallurgy of Cast Irons
Moulding Practice for Gray Cast Iron Castings
Malleable Irons
Moulding Practice for Malleable Cast Irons
Spheroidal Graphite Cast Iron (Sg Iron)
Uses of SG iron Castings
Chemical Composition
Production Technique
Moulding and Casting Practice
Vermicular Iron

PRODUCTION OF STEEL CASTINGS

Classes of Steel Castings
Specific Characteristics of Casting of Steels
Melting Practice
Moulding Practice
Green Sand Moulding
Dry sand Moulding
Pouring  Gating and Risering
Risering Practice
Cleaning and Inspection
Alloying Practice for Steel Casting
Heat Treatment of Steel Castings
Annealing
Normalising
Quenching and Tempering
Flame Hardening

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Originally, a “billet” (from the French) was a note, commonly used in the 18th and early 19th centuries as a “billet of invitation.” A particular use of the word in this sense is to denote an order issued to a soldier entitling him to quarters with a certain person. From this meaning, the word billet came to be loosely used of the quarters thus obtained. Repeated petitions against the practice of billeting, starting in the 16th century, culminated in its outlawing in 1689 as an extension of a section of the Petition of Right 1628. During wartime, civilians who have been evacuated from a city in danger of attack are billetted in communal shelters or in the homes of individuals. The practice of billetting evacuees was widespread in Britain during World War II, particularly during the Blitz, when children and other non-essential persons in major cities were sent to rural areas for safety. In European countries since the formation of regular forces the Quartermaster was an occupation and a rank of the individuals responsible for provision of sleeping quarters as well as other provisions for regular time troops.

In general, galvanized sheet metal is mild (carbon) steel that is used for a ton of different things. This material is tough and strong, and it can be fairly easily worked (bent or formed) in a number of different ways to produce useful products (like HVAC ductwork, to name just one application). It lasts a long time, too, because the zinc coating (the galvanizing) inhibits corrosion quite well.

Forging or cold forming are metalforming processes. There is no melting and consequent solidification involved. Plastic deformation produces an increase in the number of dislocations resulting in a higher state of internal stress. Indeed, strain hardening is attributed to the interaction of dislocations with other dislocations and other barriers (such as grain boundaries). Simultaneously, the shape of primary crystals (dendrites) changes after plastic working of the metal. Dendrites are stretched in the direction of metal flow and
thus form fibers of increased strength along the direction of flow. Casting is a solidification process. Therefore, the microstructure can be finely tuned, such as grain structure, phase
transformations and precipitation. However, defects such as shrinkage porosity, cracks and segregation are also intimately linked to solidification. These defects can lead to lower mechanical properties. A subsequent heat treatment is often required to reduce residual stresses and optimize mechanical properties. The book cover various aspects on Rolling Mill, Billets, Steel Wire, Galvanised Sheet, Forging and Castings.

Chapter 1
Technology of Rolling Mills

• Types of Mills
• General Classification
• Arrangement of Mills
• Types of Roll Mountings
• Mill-Size Description
• Rolling-Mill Accessories
• Lead Spindle
• Mill Pinions
• The Bearings
• Roller Bearings
• Oil-Film Bearings
• Chock Bearings
• Arrangement of Chock Bearings
• Housings
• Guides and Guards
• Rolling-Mill Roll Design and Manufacture
• Principal Parts of Rolls
• Procedure in Designing
• Elements of Good Roll Design
• Casting of Rolling-Mill Rolls
• Steel Rolls
• Iron-Base Rolls
• Chill Rolls
• Grain-Iron Rolls
• Composite or Overflowed Rolls
• Ductile-Iron Rolls
• Mill Drives and Power Requirements
• Development of Main
• Mill Drives
• Power Requirements for Various Operations in
• the Production of Steel
• Factors Affecting Size and
• Type of Main-Drive Motors
• Types of Motors for Main Drives
• Synchronous Motors
• Squirrel-Cage Motors
• Wound-Rotor Induction Motors
• Direct-Current Motors
• Principle and Application of Flywheels
• Energy Stored in a Flywheel
• Amount of Energy Available for Regulation
• Acceleration and Retardation of the
• Wheel
• Induction-Motor
• Characteristics
• Motor Load Curves Various Means for
• Obtaining Adjustable
• Speeds
• Control of Two-Speed AC Motors
• AC-Motor Speed Control by Secondary
• Resistance
• Variable-Speed Controls for AC Motors
• Variable-Speed Controls for DC Motors
• Ward-Leonard Control
• Relay and Continuous-Feedback Systems
• Reversing-Mill Drives
• The Flywheel Motor-Generator Set
• Three-High Mill Drives
• Continuous-Mill Drives
• Wide-Hot-Strip Mills
• Tandem Cold-Reduction Mills
• Continuous Billet Mills
• Continuous Bar Mills
• Continuous Rod Mills
• Continuous Seamless Tube Mill
• Motor-Room Ventilation
• Auxiliary Drives
• Table Rollers
• Screw-Downs
• Manipulators and Side-Guards
• Blooming-Mill Shears
• Future Drives
• Automatic Control of Rolling Operations
• Principles of Process Control Systems
• Process Equations
• Instrumentation
• Control of Primary Rolling
• Plate-Mill Control
• Hot-Strip Mill Control
• Roughing
• Finishing
• Computer Control
• Control of Cold-Reduction Mills
• Reversing Mills
• Tandem Mills
• Computer Control

Chapter 2
Heating Steel for Hot Working

• Principles of Furnace Design
• Objectives and General Metallurgical Requirements
• Basic Elements of Furnaces
• Furnace Size and Capacity
• Furnace Type and Shape
• Thermal Efficiency
• Materials of Construction
• Soaking-Pit Furnaces
• Introductory Types of Soaking-Pit Furnaces
• Auxiliary Facilities
• Ingot Pit Cranes
• Cinder-Removal Facilities
• Objectives in Modern Soaking Pit Design
• Modern Heating Practices
• Operating Statistics
• Reheating Furnaces
• Furnace Types
• Pusher-Type Furnaces
• Walking-Beam-Type Furnaces
• Roller-Hearth Reheating Furnaces
• General Considerations in Furnace-Type Selection
• Batch-Type Furnaces
• Pusher-Type Furnaces
• Rotary-Hearth Furnaces
• Walking-Beam Furnaces
• Roller-Hearth Furnaces
• Operating Statistics

Chapter 3
Production of Steel Blooms, Slabs and Billets

• Introductory
• Production of Blooms and Slabs by Rolling
• General Features of Blooming and Slabbing Mills
• Primary-Mill Activities
• Two-High Reversing Mill
• Two-High Tandem Mill
• Three-High Mill
• Operating Units Comprising a Blooming Mill
• Rolling
• Shearing
• Combinations of Conventional-Type Mills for Special Purposes
• Two Two-High Reversing Mills in Tandem
• Tandem and Three-high Mill in Tandem
• Four-Stand and Five-Stand Tandem
• Mills in Tandem
• Design of Blooming-Slabbing Mill Roll Stands
• Stand Design
• Roll Design and Rolling Procedures
• Roll Design
• Effect of Pass Design on Rolling Procedures
• Convexity of Passes
• Depth of Passes Bearings
• Roll-Opening Indicators
• Roll-Changing Devices
• Cooling Water
• Manipulators
• Production of Billets by Rolling
• Development of the Billet Mill
• Types of Billet Mills
• Three-High Billet Mills
• Cross-Country Billet Mills
• Advantages of Cross-Country Mills
• Continuous Billet Mill
• Six-Stand Continuous Mill at Lorain Works
• The Four-Stand Continuous Mill at Lorain
• Hot-Scarfing Machines Roll Adjustment
• Shears
• Identification
• Continuous Casting of Blooms, Slabs and Billets
• Principles of Continuous Casting
• The Continuous Slab Caster at Gary Works
• Sequence of Operations
• Process Control

Chapter 4
Steel Plates Manufacture

• Plate-Mill Products
• Plate-Mill Operations
• Heating Slabs for Rolling
• Batch-Type Heating Furnaces
• Continuous-type Heating Furnaces
• Furnace Control
• Descaling
• Plate Rolling
• Plate Rolling Variables
• Bending of Rolls
• Roll Wear
• Temperature Variation
• Levelling (Flattening) Cooling
• Shearing and Cutting
• Identification, Inspection and Loading
• General Types of Plate Mills
• Two-High Pull-Over, Two-High Single-Stand
• Reversing and Three-High Plate Mills
• Three-High Plate Mills
• Four-High Reversing Plate Mills
• 160/210-Inch Plate Mill
• Slab Yard
• Slab-Reheating Furnaces
• Scalebreaker
• Slab Turnaround
• Four-High Reversing Stand Tables
• Transfer Tables and Cooling
• Levelers
• Plate-Inspection Turnovers
• Plate Marking Crop Shear
• Side Shears
• Dividing Shear
• Scrap Shears
• Inspection and Piling
• Flame Cutting
• Heat-Treating Facilities
• Roll Shop
• Lubrication
• 160-Inch Four-High Plate Mill at Homestead Works
• Tandem Mills
• Semi-continuous and Continuous Mills
• The 100-inch Semi-Continuous Plate Mill at Homestead Works
• No. 3 Shear Unit
• No. 4 Shear Unit
• Rotary Shear Line—No. 1 Shear Unit
• Continuous Normalizing Furnace
• No. 2 Shear Unit
• The 96-inch Four-High
• Continuous Plate Mill at South Works
• Universal Plate Mills
• The 30-Inch Universal Plate Mill
• Reheating Furnaces
• 30-Inch Universal Plate Mill Stand
• Rolling
• Hot Bed
• Finishing
• Heat-Treating Facilities for Steel Plates
• Types of Heat Treatment
• Furnaces for Heat Treating Plates
• Plate Heat-Treating
• Equipment at Homestead Works
• 160-Inch Mill Heat-Treating Facilities
• 100-Inch Mill Hardening-Tempering Furnace
• Car-Bottom Heat-Treating Furnaces
• Plate Heat-Treating Equipment

Chapter 5
Technology of Steel Wire and Steel Wire Products

• Principle Uses of Steel Wire Early Method of Manufacture Classification of Steel Wire
• Bases for Classification
• Kinds and Composition of Steel Used for Wire
• Wire Shapes
• Sizes of Wire
• Classification of Common Round Wire According to Size
• Surface Finishes of Wire
• Temper of Wire
• Rolling the Wire Rod
• The Wire Rod
• Types of Rod Mills
• The Continuous Rod Mill
• The Morgan Mill
• Modern Continuous Rod Mills
• Layouts for Rolling Small Billets
• The Looping Continuous Mill
• Layouts for Rolling 4-lnch by 4-lnch Billets
• Operation of Continuous Mills
• Outline of Wire-Drawing Processes
• Preparing the Rod for Drawing
• Drawing the Rod
• Draft, Drawing and Process Wire
• Dry Drawing and Wet Drawing
• Types of Wire
• Processes and Equipment for Preparing Rods
• and Wire for Drawing
• Importance of Cleaning
• Method of Cleaning
• Manner of Handling the Material
• Types of Cranes
• Construction of Tanks
• Arrangement of Tanks
• Concentration of Acid
• Temperature for Cleaning
• Time of Cleaning
• Rinsing
• Coatings
• Process for Lime Coating
• Coatings for Dry Drawing
• Phosphate Coatings
• Baking
• Wire-Drawing Equipment
• Dies
• Die Holes
• Diamond Dies
• The Block
• Drawing Machines
• Drawbench
• Bull Blocks
• Motor Blocks
• Continuous Machines
• Intermediate Machines
• Terminal Equipment
• Fine-Wire Machines
• Drawing Frames
• Auxiliary Equipment
• Pay-Off Reels
• Welders
• Safety Stop
• Pointers
• “Turks-Head” Shaped-Wire Drawing Machine
• Heating Effect in Wire Drawing
• Wire-Drawing Processes and Operations
• Effect of Drawing Upon Mechanical Properties
• The Cause of These Changes
• Limitations of Drawing
• Dry Drawing
• Uses of Low-Carbon Wire
• High-Carbon and Specialty Wire
• Wet Drawing
• Wet Drawing-Multiple Drafts
• Drawing Limits and Tolerances
• Special Finishing Operations
• Straightening and Cutting Wire Whirls
• Roll Straighteners
• Inspection and Testing
• Importance of Inspection
• Final Tests on Wires
• Defects in Wire
• Size and Shape
• Internal Defects
• Surface Defects
• Mechanical Properties
• Heat Treatment of Wire
• Importance and Purposes of Annealing
• Annealing for Definite Structures
• Sizes of Grains
• Time and Temperature for Annealing
• Methods of Annealing Wire
• Controlled-Atmosphere Annealing
• Salt-Bath Annealing Patenting
• Metals of Patenting
• Properties of Patented Wire
• Hardening and Tempering
• Methods of Hardening and Tempering Wire
• Protective Metallic Coatings
• Kinds of Coatings
• Wire Galvanizing
• Advantages of Galvanizing
• Methods of Galvanizing
• Processes Preliminary to Hot Galvanizing
• Apparatus for Hot Galvanizing
• Wiping the Wire
• Cooling the Coated Wire
• Coiling the Wire
• Some Features of the Operations for Hot Galvanizing
• The Structure of the Zinc Coat Electrogalvanizing
• Operation of the Process
• Factors in Controlling the Thickness of the Coat
• Tests for Galvanized Coatings
• Wire Tinning
• Aluminum Coatings
• Typical Finished Wires for Manufacturing Purposes
• Common Wires
• Bright Basic Wire or Bright Hard Basic Wire Medium Classifications
• Annealed Wires
• Cold-Heading Wire
• Liquor-Finished Fine and Weaving Wire
• Welding Wire
• Brush Wire
• High-Carbon or Special Wires
• Rope Wire
• Music Wire
• Piano Wire
• Bronze Finish Tire
• Bead Wire
• Valve Spring Wire
• Tempered Wire
• Other Special Wires
• Stainless-Steel Wire
• Flat Wire
• Some Fabricated Steel-Wire Products
• Importance of Fabricated Wire Products
• Wire Nails
• Nail Machines
• Feeding
• Pinching
• Cutting
• Expelling
• Cleaning and Packing
• Wire Fence
• Woven-Wire Fence
• Barbed-Wire Fence
• Concrete Reinforcement
• Prestressed Concrete
• Bale Ties
• Wire Rope
• Fabrication of Wire Rope
• Stranding
• Laying or Closing
• Types of Wire Rope
• Wire Springs
• Spring Terms
• Bluing
• Tested Spring
• Scale Testing
• Pitch
• Active and Inactive Coils
• Initial Tension
• Bridge Wire

Chapter 6
Manufacturing Technology of Hot-Strip Mill Products

• Classification of Flat-Rolled Steel Products
• Sources and Types of Steel for Sheet, Strip and Tin Plates
• Chemical Compositions
• Steelmaking Processes Slabs
• Rolling Slabs from Ingots
• Continuous Casting of Slabs
• Bottom-Pressure Pouring of Slabs
• Continuous Hot-Strip Mills
• Development and Output
• General Arrangement of Modern Mills
• Control of Finished Product Quality
• An 84-inch Continuous Hot-Strip Mill
• Slab Conditioning and Storage Areas
• Slab-Heating Furnaces
• Runout Table
• Coilers
• Lubricating Systems
• Motor Room
• Metallurgy of Hot-Rolled Strip
• Hand Hot Mills
• Development
• Process
• Oxide Removal (Pickling and Shot Blasting)
• Necessity for Removal
• Types of Oxide
• Principles of Pickling Inhibitors
• Hydrochloric-Acid Pickling
• Spent Hydrochloric-Acid Disposal
• Continuous Pickling Lines
• Batch Pickling
• Shot Blasting
• Finishing of Hot-Strip Mill Products
• Temper Rolling (Skin Passing)
• Levelling (Flattening)
• Slitting
• Shearing
• Heat Treating

Chapter 7
Production Process of Cold-Reduced Flat-Rolled Products

• Cold-Finished Flat-Rolled Products
• Cold-Finished Flat Bars
• Cold-Rolled Carbon- Steel Strip Temper
• Stainless Cold-rolled Strip Steel Finishes
• Cold Rolled Carbon Spring Steel
• Temper
• Cold-Rolled Carbon-Steel Sheets
• Black Plate
• Principles of Cold Reduction
• Sequence of Operations in Cold Reduction
• Roll Arrangement for Cold Reduction
• Mill Layouts
• Four-High Tandem Mills
• Four-High Reversing Mills
• Two-High Cold Mills
• Disposition of Product
• Cold-Reduced Product for Strip
• Cold-Reduced Product for Sheets
• Cold-Reduced Product for Tin Plate
• Cleaning of Cold-Reduced Steel
• Heat Treatment of Cold-Reduced Steel
• Purposes and Types of Heat Treatment
• Effects of Heat
• Treatment on
• Microstructure
• Box Annealing
• Normalizing
• Continuous Annealing
• Heat-Treating Equipment
• and Practices
• Box Annealing
• Equipment
• Box Annealing
• Practices
• Open-Coil Annealing
• Normalizing
• Continuous Annealing
• Temper Rolling
• Shearing, Side Trimming, Slitting and Leveling
• Shearing to Length
• Side Trimming and Slitting

Chapter 8
Manufacture of Galvanized Sheet and Strip Uses of Galvanized Sheet and Strip

• Factors Influencing Effectiveness of Galvanized Coatings
• Coating Weight and Gage Requirements
• Metallurgical Features of the Hot-Dip Galvanizing Processes
• Coating Metal Used In Hot-Dip Galvanizing
• Steels Used for Hot-Dip Galvanizing
• Mill Treatment of Steel Prior to Hot-Dip Galvanizing
• Special Finishes
• Hot-Dip Sheet Galvanizing
• Pickling for Sheet Galvanizing
• Equipment for Sheet Galvanizing
• General Arrangement and Operation of a Sheet-Galvanizing Line
• Continuous (Strip) Hot-Dip Galvanizing
• General Arrangement and Operation of Continuous
• Galvanizing Lines
• Testing Galvanized Sheets

Chapter 9
Manufacture of Heavy Press Forgings

• Heating for Forging
• Rate of Heating
• Forging Temperature
• Handling Equipment
• Open Dies for Forging
• Principal Forging Operations
• Examples of Forging Procedure
• Cooling after Forging
• Heat Treatment of Forgings
• Car-Bottom Furnaces
• Vertical Furnaces
• Quenching Facilities

Chapter 10
Castings – Steel and Iron

• Steel Castings
• Casting Compared with Other Forms of Shaping Steel
• Composition and Mechanical Properties of Cast Steels
• Making Steel for Castings
• Molding for Casting Steel
• Patterns and Molds for Steel Castings
• Making the Mold
• Machine Molding
• Cored Molds for Hollow Castings
• Gates, Risers and Vents
• Steel Casting & Finishing Operations Casting
• Shaking Out, Cleaning, Finishing and Testing
• Heat Treatment of Steel Castings
• Annealing
• Normalizing
• Quenching and Tempering
• Flame Hardening
• Heat- And Corrosion- Resistant Steel Castings
• Highly Alloyed Steels
• Typical Applications
• Melting
• Casting
• Molding
• Finishing Operations
• Methods of Sampling and Testing
• Precision Steel Castings
• Iron Castings
• Pig Iron for Castings
• Iron Composition vs.Properties
• Forms of Carbon in Pig Iron
• Influence of Silicon
• Effects of Manganese
• Influence of Sulphur
• Influence of Phosphorus
• Effects of Chromium
• Influence of Nickel
• Influence of Copper
• Effects of Molybdenum
• Effects of Titanium and Aluminum
• Influence of Vanadium
• Effects of Special Additives
• Iron-Foundry Melting
• Methods
• The Cupola
• The Electric Furnace
• Kinds and Uses of Iron Castings
• Alloyed Castings
• Iron-Foundry Molding and Casting Practice
• Testing of Cast Iron

Chapter 11
Project Profiles

• M.S. Billet casting with induction furnace from steel scrap & sponge iron
• Mini steel plant (3t-induction furnace)
• Steel rolling mill (by induction furnace) from steel scrap and sponge iron
• Rolling mill (by induction furnace) & manufacturing of bars, angles, squares, tubes and others
• Hot rolling mill of narrow steel strip plant economics
• Rolling mill & manufacturing of bars, angles, squares, tubes & others
• Cold rolling mill
• Steel rolling mill (reinforcement bars)
• Re-rolling mill (reinforcement and structural members)
• Sodium aluminate
• Super enamelled copper wire (from copper scrap)
• Super enamelled copper wire (from copper cathode rod)
• Copper rod wire drawing and pvc wire & cables
• G.I. wire
• Stainless steel cold rolling mill from coil
• Cold roll forming of z-section and other section
• Aluminium hot and cold rolling mill
• Forging plant steel casting

An extract from the book

TYPES OF MILLS

General Classification

The three principal types of rolling mills used for the rolling of steel are referred to as two-high, three-high, and four-high mills, shown schematically in Fig. 1.1. As the names indicate, the classification is based on the manner of arranging the rolls in the housings, a two-high stand consisting of two rolls, one above the other; a three-high mill has three rolls, and a four-high mill has hour rolls, arranged similarly. When rolling is in one direction only on two-high mills, and the piece is returned over the top of the rolls to be rerolled in the next pass, the mill is known as a pullover or drag-over mill. This type of mill formerly was used mainly for production of light sheets and tin plate; it still is used by merchant mills for rolling of tool and high-alloy steels. On two high reversing mills, the direction of rotation of the rolls can be reversed, and rolling is alternately in opposite directions, with work done on the piece while traveling in each direction. The long mill tables of reversing mills make it possible to handle heavy pieces in long lengths that would be impractical to roll on ordinary twohigh mills, or to handle on the lift tables of a three-high mill (see below). The reversing two-high type of mill occupies an important position in the industry and, with the use of manipulators, it is possible to produce on it slabs, blooms, plates, billets, rounds, and partially-formed sections suitable for later rolling into finished shapes on other mills. In all three-high mills, each roll revolves continuously in one direction; the top and bottom rolls in the same direction and the middle roll in the opposite direction. The piece is lifted from the bottom pass to the return top pass by mechanicallyoperated lift tables, or by inclined approach tables. Usually the large top and bottom rolls are drive, while the smaller middle roll is friction driven.

This latter roll is about two-thirds the size of the other two rolls, in order to permit removal through the housing windows. Four-high mills are used for rolling flat material, like sheets and plates, and represent a special type of two-high mill for both hot and cold rolling, in which large backing-up rolls are employed to reinforce the smaller working rolls: either the working or back-up rolls may be driven. Four-high mills resist the tendency of long working rolls to deflect, and permit the use of smalldiameter working rolls for producing wide plates, and hot-or coldrolled strip and sheets of uniform gage. These mills often consist of a number of stands spaced closely together in one continuous line and are known then as tandem mills; the product passes in a straight line from one stand to the next. In cluster mills, each of the two small working rolls is supported by two (or more) backing-up rolls. This latter type of mill is used for the rolling of thin sheets.

Arrangement of Mills

A single stand mill, which may be either two-, three- or fourhigh, and either reversing or non-reversing, represents the most common arrangement for rolling a wide range of products, including blooms, slabs, plates, sheets, and various sections. Guide, loop, and cross-country mills are made up of several two- or three-high stands, or a combination of both, and are used for rolling of merchant-bar sections. Guide mills are small hand mills consisting of several stands of rolls in a train. Mills in train have the rolls of separate stands in the same line, the rolls of one mill being driven from the end of the rolls of an adjacent stand. Guide mills take their name from the metal guides which support the piece in the correct position during its passage through the grooves of the various passes. For example, it is possible to roll from an oval section to a round in one pass, provided the oval is supported by metal guides. In many guide mills it is the practice of the catchers, in order to save time, to start the piece through each of the passes before it is through the preceding one, thus forming a loop, resulting in this arrangement being called a looping mill.

There originated in Belgium the plan for setting up an independent roughing stand preceding the finishing train of the looping mill. This arrangement became known as a Belgian mill. On looping mills, it was found that the loop could be made mechanically by a tube or house-shoe type trough, called a repeater, and thus dispense with the hand catchers. Prior to the looping mill, the piece was rolled throughout the entire length in one pass before it could be entered in the next pass. The looping arrangement eliminates the temperature difficulties encountered with long lengths. The shapes produced range from simple rounds and squares to intricate special country mill is so named because of the scattered location of its roll stands, and was developed for rolling sections that, due to size or shape, are not adaptable to loop rolling. These mills involve the continuous idea, but the stands are placed so far apart that the piece must leave one set of rolls before entering the next.

To save space and to avoid complicating the drives, the stands usually are arranged in two or more parallel lines, and the direction of travel of the piece is reversed during the rolling by employing transfer and skid tables. This arrangement results in a high production mill of great flexibility, which may be used for a wide range of products, including structural shapes, rails, and splice bars. A continuous mill consists of several stands of rolls arranged in a straight line (in tandem), with each succeeding stand operating with roll surface speed greater than its predecessor. Reduction takes place in several passes at the same time until the piece emerges as a finished shape for the last roll stand. This type of mill is in very common usage for rolling strip, sheet, billets, bars, rods, etc. A semi-continuous mill comprises also a reversing roughing stand for reducing the piece prior to entering the continuous mill for reduction to the finished shape. This arrangement gives moderately high production with lower first cost than a continuous mill. Combination mills are those in which the roughing or major part of the reduction is performed in a continuous mill, and the shaping in a guide or looping mill.

Speciality Mills

The universal mill is a combination of horizontal and vertical rolls, usually mounted in the same roll stand (Fig 1.1). The mill is made up of two-high (and occasionally three-high) horizontal rolls, with vertical roll sets on either or both sides of the horizontal stand. The vertical rolls also usually are driven. The direction of the piece is reversed after each pass in the mill. The universal mill is used to a limited extent also for plate product that requires rolled edges (see Fig 1.2). A special type of universal mill, known as the Gray mill is well adapted for rolling beams and H-sections of great width and depth without taper on flanges (see Fig 1.3). The horizontal rolls work on the web and flange thickness, while the idler vertical rolls in the same stand work simultaneously on flange thickness only. The roughing stands and intermediate stands are of the reversing type, and each has a separate stand of driven horizontal edging rolls which work on the flange height only. The finishing stand consists of the horizontal and vertical rolls in which the beams are given one pass only.

The Wenstrom mill is a similar modification of a universal plate mill, designed principally for rolling flats. Instead of acting upon the top and bottom and the two sides at different times, it does this simultaneously. The top roll can be adjusted vertically, and the bottom roll transversely, whereby peices of different thickness and width can be produced with the same set of rolls. The Sack universal mill, designed principally for rolling cruciform sections, has horizontal and vertical rolls which act upon the piece simultaneously, the general arrangement being much like that of the Wenstrom mill. A somewhat similar principle is employed in the Schoen mill for rolling of railroad car wheels, whereby the tread and flange are rolled simultaneously with the web, while rotating the forged wheel blank in a vertical position. This is accomplished by a pair of driven web rolls, and an idler tread roll in simultaneous contact with the wheel blank. A pair of idler rim rolls controls the width of rim.

The post modern technology of rolling mill, billets, steel wire, galvanized sheet, forging and castings appeared first on EIRI - eBooks and Project Reports.

NON-FERROUS METALS AND MATERIALS

Public Sector
Private Sector
Zinc
Lead
Copper
Nickel
Magnesium
Gallium

PROCESSING OF COPPER FROM ITS ORE

Pyrometallurgy vs. hydro metallurgy

LEAD AND ZINC RECYCLING

Zinc recycling
Lead recycling
Expansion activities

CHROMIUM WASTES AND THEIR RECYCLING FOR THE RECLAMATION OF CHROMIUM

Introduction
Experimental
Physical and Chemical Characterization
Thermogravimetric Study
Kinetics of Formation of Sodium Chromate
Acid Leaching Study
Results and discussion

ELECTRODEPOSITION OF COBALT FROM COBALT CHLORIDE-N-(BUTYL) PYRIDINIUM CHLORIDE  MOLTEN SALT

Introduction
Experimental
Preparation of CoC12-BPC Molten Salt and Determination of Melting of Melting Point
Electrochemical Cell and Electrodes
Electrochemical Cell and Instrumentation
Deposit Characterization
Results and discussion
Voltammetry of CoCl2 BPC
The Charge Transfer Mechanism of Co(1) ion Reduction
Electrodeposition of Cobalt

PYROHYDROLYSIS

Beginning
Pyrohydrolysis engineering Feature
Atomization
Control parameters
Application
Solid and Hollow Spherical Particles
Ultra fine and Nano particle Synthesis
Single Phase Multicomponent Oxide Particle Synthesis
Non oxide of Metal Particle Synthesis
Composite Powder Synthesis
Fibre Synthesis
Thin films

PROCESSING OF LOW GRADE TUNGSTEN ORE

Introduction
Experimental
Results and discussion
Gravity cum magnetic Separation
Magnetic Separation followed by Gravity Separation
Concentration by a Combination of Magnetic Froth Flotation and Gravity Separation
Dry High Intensity Magnetic Separation followed by Gravity Concentration
Extraction of Tungsten from Concentrate
Process Flow sheet

EXTRACTION OF COPPER, NICKEL AND COBALT

Introduction
Experimental
Results and discussion

EXTRACTION OF NICKEL AND OTHER VALUABLE  METALS

Introduction
Selection of Process
Direct leaching/hydrometallurgical processes
Deep Sea Ventures
Metallurgie Hoboken overpelt (MHO) Process
Pyro hydrometallurgical processes
INCO process
Metal Mining Agency of Japan (MMAI)
Reduction and Smelting
Oxidation
Sulphidising and Converting
Manganese Recovery
Processing of Matte for the Recovery of Nickel, Cobalt and Copper
Chlorine Leaching
Solvent Extraction
Electrowinning
Process Development Pursued in India
Reduction roasting Ammonia Leading process
Reduction Roasting
Ammonia ammonium Carbonate Leaching
Solvent Extraction and Electrowinning
Ammonia Stripping and Cobalt  Recovery

PRODUCTION OF URANIUM METAL

Brief Details
Theoretical formulation
The Process
Parametric evaluation
The Green Salt
Magnesium Quality
Lining Quality
Furnace Temperature

ALUMINA-ALUMINIUM PROCESSING

Process technology
Alumina Refinery
Aluminium Smelter
Present  process technology scenario
Alumina Refinery
Aluminium Smelter
Future Scenario of Aluminium Industry

HIGH TEMPERATURE ALUMINIUM ALLOYS

Introduction
AI-Li and Al-Min Alloys
Rapid solidification of Al alloys
Al-Fe-Ce alloys
Al-Ti alloys
Al-Fe-V-SI Alloys
Mechanical alloying
Cast Al-Fe-V-Si alloys

ALUMINIUM PRODUCTION PROCESS

Introduction
Process outline
Anodes
Alumina Feeding
Electrolyte
Energy consumption
Shell Structure
Metal Evacuation
Management of pot operation during
anthracite to semi-graphite cathode conversion
Selection of Blocks
Selection of Parameter
Alumina Feeding
Thermal Equilibrium
Anode Meal Distance (AMD)
Percentage of Excess ALF3
Power Input in the Pot and Heal Exchange with the Exterior

REFRACTORIES

Introduction
Refractories for aluminium production
General Trends in Aluminium Industry
Pot Lining
Carbon Baking Furnace
Characteristics of Refractory in Carbon Baking Furnace
Trends in Anode Baking Refractories
Cast House Refractories for Primary and Secondary Aluminium Production
Melting furnace
Metal Contact Area i.e. Hearth, Ramp, Lower Side Wall and Trough
General Requirements of Aluminium Furnace Refractories
Non-metal Contact Area Roof  and Upper Side Wall
Holding  furnace
Metal contact Area
Non metal contact area
future trends in Refractories for Aluminium Industries

ALUMINIUM BASED COMPOSITES

Introduction
PM route
Liquid Phase Route
Infiltration Technique
Pressureless Infiltration Techniques
Pressure Infiltration Techniques
Vacuum Infiltration
Reactive Infiltration
Injection Technique
Mixing Technique
In-situ Growth
Spray Forming

DRAWING OF COPPER AND ALUMINIUM CONDUCTOR

Introduction
Raw material and its specification
Copper Redraw Rod
Aluminium  Redraw Rod
Wire Drawing
Drawing Copper Wire
Drawing of Aluminium Wire
Problem in wire drawing

PROCESS FOR THE ENRICHMENT OF  NICKEL

Introduction
Experimental
Results and Discussion
Process for Nickel Enrichment
Optimisation of Leaching Parameters
Neutralization of the Leach Liquor
Calcination of the Hydroxides
Final Product
Merits and strengths of the present process

NON-FERROUS EXTRACTION

Introduction
Leaching bacteria
Microbiology of Thiobacillus ferroxidans
Mechanisms of bacterial leaching
Direct Mechanism
Indirect Mechanism
Galvanic Conversion
Applications of bioleaching
Bioleaching of Copper
Bioleaching of Uranium
An Integrated approach for gold processing
Bioleaching of complex sulphides and ocean nodules

MEAL EXTRACTION

Introduction
High temperature leaching (HTL) processes
HTL process for Tungsten-Containing Raw Materials
HTL Process for Gold Containing Raw Materials

SILICA

Introduction
Silica problem overview of remedial measures
Control of Polycondensation Reactions of Silicic Acid
During the Acid leaching
Coagulation or Flocculation of Silicic Acid
Purification Processing by Solvent Extrction in Presence of Silica

EXTRACTIVE METALLURGY OF COPPER

Introduction
Mineral benefication
Smelting
Converting
Hydrometallurgy

PROCESSING OF LEAD ZINC RAW MATERIALS

Introduction
Integrated processing concept and developments

ZIRCONIUM, TITANIUM AND MAGNESIUM EXTRACTION

Introduction
Zirconium
Occurrence and Mineral Resources
Relevance of Hafnium Separation
Opening of Zircon
Direct Chlorination
Caustic Fusion
Fusion with K2SIF
Zr-Hf Separation Pocesses
MIBK Thiocyanate Process
TBP Nitric Acid Process
Amine Sulphate Process
Molten Salt Distillation
Fractional  Crystallization
Sponge Production  Technologies
The Kroll Process
Molten salt  Electrolytic Process
Technology development in India
R & D and Pilot Plant Trials
Commercial Scale  Production of Zirconium Sponge
Zirconium Oxide Plant
Zirconium Sponge Plant
Future  Plans
New Zirconium Oxide Plant
New Zirconium Sponge Plant
Export Potential
Titanium
Occurrence  and Mineral Resources
Titanium Sponge Production Technologies
Hunger’s Process
Kroll Process
Fused Salt Electrolysis
Technological improvements in Kroll Process
World Production of Titanium Sponge
New Extraction Processes under Study
Technology Development in India
Laboratory Pilot Plant Studies
Titanium Technology Demonstration Plant at DMRL
Development of 4000 kg/Batch Combined  Process Technology
Chloride Purification
Combined Process Equipment
Future Plans
Magnesium
Occurrence and Resources
Metal Production Technologies
Pidgeon Process
Magnatherm Process
Electrolytic Process
Magnesium Technology Development in India
NML Programme
CECRI Programme
Cell Development  Technology at DMRL
30 kA, Modular Type  Monopolar Cell
Salient  Features
Multipolar Cell Technology

EXTRACTION OF TITANIUM

Introduction
Production of primary titanium metal
Kroll Process
Oxide Reduction Process
Production of Metal (Powder) by other Chloride Reduction Processes
Electrolysis  Process
Hybrid Process
Processing  of ilmenite and scrap titanium
Processing of Off Grade and Scrap Titanium

SPECIAL METALS EXTRACTION

Introduction
Resources
Energy and environment
Products
Tantalum
Post reduction Processing
Rare Earths
Supercritical fluid extracion
Processing of metals  and alloys
Thermodynamics and phase diagrams

NIOBIUM, TANTALUM, HAFNIUM AND GALLIUM PRODUCTION

Introduction
Niobium and tantalum metals
Separation of Niobium from Tantalum
Commercial Separation Methods
Conversion to Intermediate Compounds
Metal Production
Niobium
Tantalum
Commercial Reduction Methods
Purification
Applications
Applications of Tantaium
Applications of Niobium
Hafnium metal
Separation Method
Commercial separation routes
Reduction
Commercial Reduction Routes
Applications
Gallium
Extraction
Mercury Amalgamation Process
Gallate Electrolysis
Purification
Filtration
Pyro vacuum Refining
Electrolytic Purification (2 stages)
Anodic Polarisation
Super Purification of Ga (5N o 7N)
Applications

EXTRACTION OF METALS

Extraction of metals from chloride media
Extraction of Metal with Mixed Extractants from Mixed Media

EXTRACTION OF COPPER BY DI-(2-ETHYLHEXYL) DITHIOPHOSPHATE SALTS

THE PURIFICATION OF ELECTROLYTES FROM COPPER AND IRON

EXTRACTION OF RARE METALS FROM INDUSTRIAL PRODUCTSS OF LEAD ZINC PRODUCTION

Extraction of Indium

EXTRACTION OF CADMIUM

SOLVENT EXTRACTION IN THE PROCESSING OF LEACH AND WASTE SOLUTIONS

Ammoniacal leach  solution of sea nodules
Purification of Nickel and Copper Bleed Solution
Electrowinning  of  Nickel and Copper in the Close Loop Operation with SX
Separation and recovery of cobalt and zinc
Recovery of Nickel from the Ammoniacal leach solution of Lateritic Ore
Recovery of Copper and Zinc from Sulphate Solution

RECOVERY OF TUNGSTEN FROM ALKALINE SOLUTION OF WOLFRAMITE CONCENTRATE

RECOVERY OF CHROMIUM AND GALLIUM

METALLIC WASTE FROM INDIAN ZINC AND LEAD INDUSTRIES

Introduction
Zinc Industries
Waste  Treatment and Disposal Practices in Zinc Industries
Newer  Processes
Lead Industries
Waste Treatment and Disposal Practices in Lead Industries
Newer  Processes
Permissible Limits of the Hazardous metallic constituents

POLYBDENUM

Low Grade Molybdenite Concentrate
Molybdenum Bearing Spent Acid
Molybdenum Scrap
Vanadium
Bayer Sludge

ZIRCONIUM

Zircaloy scrap

RARE EARTHS

BAUXITE BEFICIATION

Export Potential
Characteristics of waste materials

Preface
The term non-ferrous is used to indicate metals other than iron and alloys that do not contain an appreciable amount of iron. These are metals which do not contain any iron. They are not magnetic and are usually more resistant to corrosion than ferrous metals.
Non-ferrous metals are metals that do not contain iron. There are two groups of metals; ferrous and non-ferrous. Ferrous metals contain iron, for example carbon steel, stainless steel (both alloys; mixtures of metals) and wrought iron. Non-ferrous metals don’t contain iron, for example aluminium, brass, copper (which can be remembered as ABC) and titanium. You can also get non-ferrous metals as alloys eg, brass is an alloy of copper and zinc.

Non-ferrous metals are specified for structural applications requiring reduced weight, higher strength, nonmagnetic properties, higher melting points, or resistance to chemical and atmospheric corrosion. They are also specified for electrical and electronic applications. Non-Ferrous Metals include: Aluminum, Beryllium, Copper, Lead, Magnesium, Nickel, Precious Metals, Refractory Metals, Tin, Titanium, Zinc. Nonferrous metal wastes can be efficiently recycled at small plants only if an optimum processing system is established for each type of waste. Such a system should make use of the latest machines and mechanisms to prepare the charge and other materials for the refining-casting conversion. This approach would make it possible to obtain quality finished products in a costeffective manner. In world practice, quality alloys based on nonferrous metals can be reliably produced only if the charge consists of no more than 50% wastes. Also, those waste products must have already undergone metallurgical processing and been certified for further use.
Thus, a key prerequisite to implementing a successful recycling system is the sorting of scrap based on its physical, chemical,technological, commercial, and other properties. Further classification of wastes based on size and heat treatments administered to the surface in active gases and salts maximizes the likelihood that these materials will be free of harmful impurities and undesirable elements.
However, this aspect of recycling is currently the least advanced and least mechanized and entails high labor costs. In practice, a separate flow diagram is used for each group of metals, depending on the physical, physicochemical, and technological properties of the wastes and scrap. Nonferrous-metal wastes and scrap can be divided into four unequal groups:
• aluminum and its alloys;
• copper and its alloys;
• wastes of heavy nonferrous metals;
• wastes that contain high-melting and rare elements.
Each of these groups should in turn be divided into subgroups based on purity and elemental composition and then subjected to chemico-thermal treatment in active gases and salts. The metals should afterward be melted to obtain samples for analysis. Metal extraction means the separation of metals in a pure or relatively pure state from the minerals in which they naturally occur.
The Earth’s crust contains many different rocks. Rocks are a mixture of minerals and from some we can make useful substances. A mineral can be a solid metallic or non-metallic element or a compound found naturally in the Earth’s crust. A metal ore is a mineral or mixture of minerals from which economically viable amounts of metal can be extracted, i.e. its got to have enough of the metal, or one of its compounds, in it to be worth digging out!
Ores are often oxides, carbonates or sulphides. They are all finite resources so we should use them wisely! In order to extract a metal, the ore or compound of the metal must undergo a process called reduction to free the metal i.e. the positive metal ion gains negative electrons to form the neutral metal atom, or the oxide loses oxygen, to form the free metallic atoms. The chemical that removes the oxygen from an oxide is called the reducing agent i.e. carbon, carbon monoxide or sometimes hydrogen. Generally speaking the method of extraction depends on the metals position in the reactivity series.

The reactivity series of metals can be presented to include two non-metals, carbon and hydrogen, to help predict which method could be used to extract the metal. Metals above zinc and carbon in the reactivity series cannot
usually be extracted with carbon or carbon monoxide. They are usually extracted by electrolysis of the purified molten ore or other suitable compound e.g. aluminium from molten aluminium oxide or sodium from molten sodium chloride.
The ore or compound must be molten or dissolved in a solution in an electrolysis cell to allow free movement of ions (electrical current). Theory given in the appropriate sections. Metals below carbon can be extracted by heating the oxide with carbon or carbon monoxide. The non-metallic elements carbon will displace the less reactive metals in a smelter or blast furnace e.g. iron or zinc and metals lower in the series. Metals below hydrogen will not displace hydrogen from acids. Their oxides are easily reduced to the metal by heating in a stream of hydrogen, though this is an extraction method rarely used in industry. In fact most metal oxides below carbon can be reduced when heated in hydrogen, even if the metal reacts with acid.
Some metals are so unreactive that they do not readily combine with oxygen in the air or any other element present in the Earth’s crust, and so can be found as the metal itself. For example gold (and sometimes copper and silver) and no chemical separation or extraction is needed. In fact all the metals below hydrogen can be found as the ‘free’ or ‘native’ element.
Other methods are used in special cases using the displacement rule. A more reactive metal can be used to displace and extract a less reactive metal but these are costly processes since the more reactive metal also has to be produced in the first place! See Titanium or see at the end of the section on copper extraction.
Historically as technology and science have developed the methods of extraction have improved to the point were all metals can be produced. The reactivity is a measure of the ease of compound formation and stability (i.e. more reactive, more readily formed stable compound, more difficult to reduce to the metal). The least reactive metals such as gold, silver and copper have been used for the past 10000 years because the pure metal was found naturally. Moderately reactive metals like iron and tin havebeen extracted using carbon based smelting for the past 2000- 3000 years. But it is only in the past 200 years that very reactive metals like sodium or aluminium have been extracted by electrolysis.

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