IPE 311 Material Handling and Maintenance Management SIDRATUL MUNTAHA AKASH Lecturer, Department of IPE Overview • Issues and importance of handling of materials • Designing concepts of common handling and transfer equipment • Maintenance management Issues and importance of handling of materials • Classification of materials: Unit load, Bulk loads • Study of Material Handling Systems and their efficiency • Selection and Classification of Material Conveying Equipment • Analysis of Material Handling problems Types of Industrial Transport • External Transport • Internal Transport Internal Forms of Industrial Transport • Intershop Transport • Intrashop Transport Selection of Conveying Equipment • Properties of Material Unit Load Characterization • Dimension • Shape • Piece-weight • Stacking tendency Bulk Load Characterization • Lump size • Bulk weight • Specific weight • Angle of repose Lump Size • Characteristic Size • Sized vs Unsized • Homogeneity of particles • Important for Load carrying member and Hopper, Bins Lump Size Bulk Weight Bulk Weight • Bulk weight – Aerated vs Packed • Packing Co-efficient • Important for capacity and pressure on walls of hopper Specific Weight • Important for pneumatic and hydraulic equipment • Specific weight= Weight of dried material/ Volume of displaced water Angle of Repose • Related to Mobility • Mobility and Angle of repose inversely related • Dynamic vs Static angle Angle of Repose Friction factor Co-efficient of Friction of material with Load carrying member Design parameter for angle of inclination of walls of hoppers Also for inclination of conveyor Abrasivity • Particles wear away surface • Surface materials of different parts of conveyor design • Particle hardness, shape and size determines abrasivity Types of Conveying Equipment • Intermittent vs Continuous • Pulling member basis • Direction of Conveyance Selection of Conveying Equipment Material properties• Physical properties • Mechanical properties Selection of Conveying Equipment Capacity of equipment • Capacity required vs economic constraints • Increase in conveying rate increases compactness • Capacity influenced by conveyance rate Selection of Conveying Equipment Direction and Length of run • Layout of loading and unloading points • Change of direction, change of inclination are consideration • Minimize intermediate transfers Selection of Conveying Equipment Storage at ends • Method of loading and unloading • Unit load vs Bulk load • Minimize labor and auxiliary equipment Selection of Conveying Equipment Processing steps and Load movement • Technological factor • Connected to the overall system Selection of Conveying Equipment Local Conditions Economic Appraisal One-time investments• Initial cost of equipment • Its delivery • Setup and Installation • Cost of building and auxiliary setup Running costs• Servicing costs • Power expenses • Repair • Material costs (lubrication, cleaning) General• Depreciation costs THE END
