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Aspects in Mining & Mineral Science
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Crushing plants are of great interest in reducing a particle size of rocks and ores as milling operations need to consider sustainable development. Since the crushing plants operate under harsh conditions and involve very abrasive material, multiple factors can influence their performance. This paper assesses a number of factors affecting the performance of the crushing plant by addressing the critical design parameters and consideration of ore characteristics, operability and maintainability. Due to the fact that ore properties remain the same during milling, its control may become difficult for yield and quality of a product. However, an operation factor can contribute positively to the performance if it is well managed by experienced operators. The present paper also considers the operational, instrumental, mechanical and maintenance aspects of crushing plant, focusing on the capacity and quality.
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Tanzania Journal of Engineering and Technology
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The requirements for the quality of rock are changing from time to time depending on the customers. In Estonia, several selective methods have been tested for managing the flow of the run of mine. The main methods for selective extraction of limestone, oil shale and phosphate rock have been selective blasting, bulldozer and excavator ripping and cutting by surface miners. Selective crushing has been achieved by axle crusher and separation by jigging. All methods have shown promising results for changing the waste rock balance in the product. The working principle of the separation methods is based on physical properties of various materials. Some other tests have been performed, like crushing with Bradford breaker and fine separation. The main hypotheses are related to usability of dry selective crushing and in situ separation of oil shale and limestone in the mine to support effective management of calorific value and backfilling.
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