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Mining Machinery Wear Parts Replacement Cycle

The replacement cycle of mining machinery wear parts is significantly affected by the type of equipment, intensity of working conditions, material hardness and other factors. The following is an overview of the replacement intervals for major equipment, with reference ranges based on working conditions:

I. Crushing equipment wearing parts

Jaw crusher

Jaw plate: replace at 4,000 hours or when the wear amount is >60mm (can be shortened to a few months for hard rock conditions)

Side guards: replace at about half a year or when the wear amount reaches 2/5 of the original thickness 56 Elbow plate: replace at about half a year or when the wear amount reaches 2/5 of the original thickness or when the wear amount reaches 2/5 of the original thickness

Elbow plate: about half a year, surface cracks >50mm need to be dealt with in time

Bearing: 8000 hours, vibration value >7.1mm/s is the early warning indicator

Cone/Impact crusher

Crushing wall/mill wall: specific intervals /Mortar walls: specific intervals not specified, regular inspection of wear grooves or pits

Plate hammers: life expectancy under high impact conditions only 80-120 hours, high frequency replacement required

Hammer crusher

Hammer head: similar to plate hammers, life expectancy in hard rock conditions as short as 80-120 hours 14 Castor plates: life expectancy after wear and vibration value >7mms is an early warning indicator 120 hours

Castor Plate: wear affects material size, need to be evaluated in conjunction with working conditions

Second, wearing parts for grinding equipment

Ball Mill

Liner: corrosion is accelerated in wet grinding environments, life expectancy is reduced by 50%, depending on the hardness of the material (e.g., even shorter for iron ore conditions). Grinding balls: hundreds of tons per year for a single machine, replenished regularly rather than on a fixed cycle

Bearings: no fixed number of hours, need to be checked regularly for signs of wear

Vertical mills

Grinding roll liners: subject to shear forces, similar replacement frequency Ball mill liners

️ III. Conveying and fluid equipment wear parts

Slurry pumps

Impellers: 1000-2000 hours for severe conditions (high slurry concentration), up to 3000 hours for mild conditions

Guards: 800-1500 hours for Shield: 800-1500 hours replacement, even shorter for sharp particles

Sleeve: replacement cycle similar to impeller, about 1000-3000 hours