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Ore and Minerals Beneficiation

Ore and Minerals Beneficiation

The grinding process during the preparation of mineral raw for beneficiation is the most energy-consuming and determines the quality of the finished concentrate, namely the proportion of locked splices that sharply reduce the efficiency and hinder the further beneficiation of minerals. Ideally, the exposure should be carried out by breaking the ore along the boundaries between valuable minerals and rock. In this case the goal of any exposure process is achieved, namely getting a high proportion of mono-mineral particles that are most effectively separated during the subsequent beneficiation cycle, i.e. creating the conditions of “selective” disclosure of minerals.

If we impact action on mineral, its collapse occurs along microfractures and cleavage boundaries that have different resistance to the impact. In this case a ratio of splices is minimal. The principle of selective exposure of minerals cannot be implemented under the following static forces: squeezing / shear / wearing used in jaw crushers, cone crushers, ball and rod mills. These methods of grinding retain a large number of splices and are highly energy-consuming. The impact method of minerals’ destruction implemented in crushers DC and grinders KI has a strong potential:

  • improvement of traditional beneficiation methods and performance of mineral-processing equipment;
  • better exposure of mineral grains in course of a larger grinding compared with ball milling;
  • exclusion of overgrinding and product sludging (typical for grinding in ball mills);
  • possibility of gravity preparation methods / for many minerals transfer to the dry beneficiation methods.

Increasing of the product size due to the better exposure of minerals under shock grinding and reduction of sludge allow to apply gravitational processes on the first stage of beneficiation that reduces the cost of ore processing: air classifiers may be used in schemes of the ore preparation for beneficiation (separation by size, density), for a preliminary beneficiation: separation of minerals into the concentrate on the grinding stage, the selection of the grinded ore with the waste grade of valuable elements in the tailings. As a result, there is no need for additional equipment, and the amount of material fed for beneficiation is reduced.

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