Wear Parts for Cone and Jaw Crushers

Wear Parts for Cone and Jaw Crushers

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How to choose wear parts? z

Castability of wear part?

z

Abrasiveness of rock material (AI)?

z

Risk of high impact loads during service?

z

Work index (WI) of incoming material?

z

What degree of expansion during work can be accepted (and expected)?

z

Type of crusher?

z

Type of crushing (coarse/fine)?

z

Size of incoming rock material?

z

Operational parameters for the crusher?

z

Any tests made on other wear materials?

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Crushing chambers for Hydrocones

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Mantle – Difference between A and B

A B

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Mantle – A or B A-Mantle: z Used with small setting and small throws. z Used wrongly means that large enough setting can not be obtained. Piston in bottom position.

B-Mantle: z Used with large setting and large throws. z Used wrongly means poor utilization at the end of the A-dimension.

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Utilize the Travel length!

Heavy Choke (HC) - Mantle Advantages: z Enable smaller settings – More reduction means less circulating load and better shape in small fractions (5-8). z Larger feed opening – Marginal stones enter. Disadvantages: z Lower throughput – Especially with new liners.

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Wear problems z Crushing chamber selection Concave and mantle z Feed distribution

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Preventive maintenance z Wrong feed arrangement 9 Higher power usage = higher load on bearing 9 Lower capacity 9 Higher wear in the crushing chamber 9 Less reduction 9 Worse shape of final product 9 Higher cost

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Special Liners – 3C 3C includes: z Crushing Technology – Solution z After market – Business z Production – Time Increased customer value: z Longer liner life z More reduction z Correct setting

Report results to Crushing Technology Group

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Special Liners Problem: z Low capacity in the end of liner life. Action: z More vertical in the top section by machining Result: z No premature liner change – 50% increase in liner life. z Full capacity all through the liner life.

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Special Liners Problem: z Wear on support ring when running at large settings Action: z Machining in the bottom section to make more space from the support ring Result z No wear on support ring

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Special Liners Problem: z When changing only concave ring the edge creates low capacity Action: z Remove the edge by machining maintaining nip angle Result: z No capacity problem z No need for cutting

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Special Liners Problem: z High wear and not enough reduction Action: z New patterns for both mantle and concave optimizing feed opening and thickness Result: z More reduction, %10000 years

z Sandvik quality and development???? 9 Tooling and Material Technology

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Preventive maintenance z Warranty policy 9 Design, material or manufacturing 9 Report to Sandvik Rock Processing within warranty time 9 Used according to maintenance manual and in appropriate applications. 9 Service and repair carried out by SRP authorised personnel 9 Use Sandvik Rock Processing genuine parts

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Preventive maintenance z Parts policy 9 Genuine Parts = optimal safety and economy 9 Latest design and quality 9 10 years supply of parts

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Preventive maintenance z Storage of parts 9 Check corrosion protection regularly 9 Place wood under heavy components 9 Seals and gaskets shall be stored under dark, dust free and dry conditions, preferably at room temperature. 9 Bushings should be kept standing 9 E.g. dust seal ring should be stored flat

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Proactive Elements for Success: z Availability of Parts 9 Operational cost, process, performance

z Reliability of Parts 9 Effective maintenance, operational cost, uptime

z Maintenance 9 Operational cost, uptime

z Process 9 Desired product, minimise waste, utilise plant, adopt to changes

z Performance 9 Capacity, uptime, quality

Quarry Academy 2005