crushers - · pdf filetypes of jaw crusher main types blake type double toggle blake type...

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CRUSHERS

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CONTENTS Introduction

Types of Crushing (Primary, Secondary, Tertiary)

Flowsheet for crushing plant

Open circuit & Close circuit crushing

Jaw Crusher (Introduction, Types, Construction, Rating),

Gyratory Crusher (Introduction, Rating, Construction),

Comparison of Gyratory & Jaw Crushers

Cone Crushers (Introduction, Types, Construction, Parameters),

Roll Crusher (Introduction, Types, Parameters, Surface),

Impact Crushers (Introduction, Construction, Parameters, Types),

Rotary Coal Breaker

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Introduction & Types of Crushing

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What is crushing?

Main objectives of crushing

Types of Crushing

Primary Crushing

Secondary Crushing

Tertiary Crushing

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PRIMARY CRUSHERS

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Introduction to Jaw Crusher

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What is a Jaw Crusher?

Types of Jaw Crusher

Main types

Blake type

Double toggle Blake type

Single toggle Blake type

Dodge type

Universal type

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Double toggle Blake type

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Single Toggle Blake Type

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Comparison B/t

Double Toggle & Single Toggle

Parameters

Type of motion

Capacity

Wear

Maintenance cost

Capital cost

Nature of material

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Free crushing & choked crushing

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Jaw Crusher Construction

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Main Frame (in sections)

Jaws & Liners

Cheek Plates

Characteristics of Jaw Crusher

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Angle b/w jaws

Speed

Throw

Set

Safety Spring

Capacity

Energy requirements

Reduction ratio

Drawbacks of Jaw Crusher

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180 degree machine

Not suitable for stick Material

Lumps passes without crushing

Applications of Jaw Crusher

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Gyratory Crusher

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Introduction, Construction & Working

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Characteristics

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360 degree machine

Much higher capacity than jaw crusher

Crusher size

Power consumption

Feeding mechanism

Use of grizzlies ahead of crusher

Choking

Comparison b/w Jaw & Gyratory

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Size of ore

Capacity required

Capacity formulas

Capital and maintenance costs

Size of the machine

Foundations

Feeding mechanism

Sectioning

Type of the material being crushed

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SECONDARY CRUSHERS

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CONE CRUSHER

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Introduction

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Characteristics of Cone Crusher

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Throw

High speed action

Parallel section b/w liners at discharge

Distributing plate

Set

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ROLL CRUSHER

Introduction & Mode of Operation

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Types of Roll Crushers

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Single Roll type

Double Roll type

Three Roll Type

Four Roll Type

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Parameters affecting performance

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Angle of nip

Speed of roll

Size of roll

Capacity of roll crusher

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Surface of Roll Crusher

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IMPACT CRUSHER

Introduction & Mode of Operation

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Applications of Impact Crushers

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Stress-free stone production for brick making, building &

road making

Used in quarrying operation for crushing plastic material

Produce cubical product

Construction & Working

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Parameters of Impact Crushers

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Weight of hammer

Speed of rotor

Nature of feed

Reduction Ratio

Types of Hammer Mill

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Fixed Hammer Mill

Rotary Hammer Mill

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