Basic Conveyors

Belt Conveyors, Operation & Maintenance

in Cement Plant

Contents

1- Introduction

1.1 Handling and conveying of material

1.2 Material characteristics

1.3 Materials in cement industry

1.4 Main processes in cement industry

1.5

1.6 Conveying equipments in cement industry

1.7 Factors affect choice of conveying equipment

2-Belt conveyor

2.1 Advantegaes of belt conveyor

2.2 Belt conveyor in industry

2.3 Belt conveyor in cement industry

3- Basic design concept

3.1 operation theory

3.2 configurations

3.3 Different lay out

3,4 Capacity

4- Components

4.1 belt

4.2 idlers

4.3 pulleys

4.4 loading and discharge

4- Maintenance and repair

joining belts

alignment

5- Safety

hazard

accidents

6- Appendix 1 safety

2 alignment

1

Introduction

1.1 Material Handling

Material handling includes all material consideration except

processing operations. It includes :

• conveying

• feeding

• packing

• storing

• warehousing

• loading

• unloading

Material Conveying

Moving material continuously or intermittently between two or

more points along fixed path

1.2

Materials characteristics

Materials characteristics which more affect conveying process are :

1- Particle size

Bulk

Blasted

or

ripped

Crushed

Grinded

2- Particle shape

Rounded

Sub-rounded

Sub-angular

Sharp angular

3- Angle of repose

It is the angle of pile formed by free and careful

pouring of material

The lower angle of repose , the more flowable material will be

4- Angle of surcharge

It is the dynamic angle of repose

It is edge angle of shacked pile

Angle of surcharge is less than angle of repose

Material is shacked when :

• by truck over irregular land

• by belt of big sag

Shacking material results in :

• large lumps migrate upwards

• the pile moves latterly outwards

1.3 Cement dry process flow chart

Cement Mills

Pre- heater

Cement Sioles

Clay

Crusher

R.M

Soils

‫كساره‬

‫الكلنكر‬

R.M mills...