WI270 Improving Crusher Reliability

This course provides information that will enable maintenance personnel to increase plant productivity by improving the performance and reliability of rotating equipment. Students will understand best practices in crusher selection and maintenance and the value of preventive maintenance by conducting careful maintenance practices and planning. They will understand what to look for in inspections and will be able to provide feedback on the condition of the equipment

Description

Introduction to Crusher Selection

• General Crusher Selection based on Abrasive Index (AI) and Impact Values which helps to select the appropriate crusher for a given ore type, i.e. Hardness and Abrasiveness
• A brief description of how the crushers operate
• An understanding of the common industry terminology

The Value of Preventative Maintenance
• Monitoring and measurement
• Replacement of components due to normal wear
• Damage caused by failure to adjust or replace worn parts
• Damage caused by foreign influences
• Recording and review of data

Maintaining Primary, Secondary and Tertiary Crushers
• Crushing action comparison between Single and Double Toggle Crushers
• General arrangement of typical single toggle and double toggle jaw crusher
• Advantages of rolling end toggles over conventional socket end type
• Checklist (Daily, Weekly, Monthly)
• General rule of thumb principles
• Understanding the crusher chamber
• Types of cone and gyratory crushers, bottom and top support
• What causes Hot Spots
• Fret Corrosion
• Checking C.S.S of Gyratory and Tertiary Crushers

Maintaining Impact Crushers – Vertical and Horizontal
• Typical Problems and Solutions - Impact Crushers

Maintaining Screens
• Fundamentals of Screening
• Screen types
• Screening Media
• Troubleshooting (Inclined or Horizontal Screens, Vibrating Screens)
• Common screen cloth failures

Maintaining Feeders
• Grizzly Feeder
• Apron Feeder
• Vibrating Feeder

Maintaining Conveyors
• General maintenance checks (Belts and Rollers, Lanyard Safety Switches, Gear-box lubrication, Spillage, Visual inspection)

Bearing Types, Analysis, Lubrication and Failure
• Functions of rolling bearing
• Bearing Mounting (Tightening angle, clearance reduction, axial drive-up)
• Lubrication
• Bearing Failures

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