Factors needing considering in the operation of crushing machine
14 January, 2013 at 7:37 am in Buy & Sell
Although spills cannot be avoided, plant layout must facilitate quick and easy cleanup. Provisions should be made for suitable plant cleaning equipment. Wash-down hoses should be located within easy reach throughout the plant. Water pressure should be sufficient to wash down hard-to-access areas. Some operators regularly wash their crushing plants from top to bottom to eliminate dust build-up on the structural steel and equipment. Build-up on structure steel members tends to filter down throughout the plant during operation.
Designers of new plants must be aware of ways of making a plant simple and economical to run; many plant modifications and additions can be justified by reductions in operating costs. Operation rooms should provide a comfortable, well-ventilated workspace with potable water and toilet facilities nearby. The operator should also be able to see all the main parts of the crushing facility under his control, through good direct visibility and by means of TV cameras and monitors.
Conveyors should have adequate clearance above the floor to permit access to spillage by shovels or plows.
Crushers, chutes and belts are all subject to extensive wear, and wear parts and plates can be heavy. The designer should keep the weight of replacement parts, which must be manhandled to within 27 kg (60 lb) for ease of installation. Monorails and hoists should be provided for ease of maintenance.
Plants must be designed for ease of access and maintainability if they are to meet their production goals. Keeping maintenance requirements to a minimum helps achieve higher overall operating availability. Scheduled preventive maintenance at crushing plants involves a number of elements, including:stone breaking machine: http://www.crusher-machine.com/n217.html
• Crusher wear parts
• Screen decks
• Feeder wear parts
• Conveyor skirting and adjustment
• Oil and lubrication
• Conveyor belt repair
• Visual inspections
• Electrical and instrumentation adjustments.
Provisions must be made for overhead cranes to remove and replace crusher wear parts. Supports must be provided for gyratory and conveyor main shafts and laydown space for the cone crusher bowls is essential. Some operators carry a complete spare screen and change out for major screen maintenance. Trolleys, jib cranes and pull points should be designed to facilitate equipment maintenance. Oil and lubrication systems should be centralized and designed for easy automatic changes, with provisions for well-ventilated centralized lubrication rooms where possible. (e.g., a line of fine cone crushers should have a central oil receiving area, with piping to and from each crusher lube package for quick and easy oil changes.)
Conveyor head chutes should be designed for easy access (not just through an inspection door, but through a man door in the chute). Conveyor belt change areas should be provided. Maintenance personnel should have easy visual and rapid access to screen decks for panel replacement. Designers should work with the screen manufacturers to ensure that covers provide good access for working on screens. Screening facilities must meet rigid dust emission requirements, but many off-the-shelf screen dust covers have not kept pace with these requirements. It may be necessary to custom-design covers that minimize emissions and provide easy access to the screen.