(1) save water resources, reduce water scarcity and railway transport railway capacity shortage has become the two major factors constraining the development of China coal industry. Dry coal preparation is an important method to resolve this contradiction, and it has been highly valued by relevant state departments.

(2) Less investment in construction. The vast majority of small and medium-sized local coal mines are difficult to develop coal processing due to the lack of large investment required to build a sorting plant. If the dry coal preparation technology is adopted, the coal processing business can be developed under the conditions of low investment, low production cost, small land occupation and quick effect.

(3) Solve the problem of muddying of wet mud by wet sorting. Some coal types (such as lignite, etc.) have high internal moisture and are seriously cemented. Not suitable for wet sorting, it is necessary to use dry sorting to make the necessary supplements.

(4) Avoid the freezing of wet coal preparation products in alpine regions. In the cold regions of the north, the use of dry coal can avoid freezing problems in winter washing products, save investment and production costs for establishing a dry workshop, and save a lot of energy.

(5) Simplify the coal preparation process. The dry coal preparation technology is simple in process and has no environmental pollution caused by coal slurry water.

(6) Facilitate the development of comprehensive utilization of coal. The dry sorting technology can be used not only for the selection of coal but also for the comprehensive utilization of coal, such as the recovery of pyrite , the increase of calcite heat, and the removal of impurities from power plant raw coal.

In summary, the above-mentioned various advantages have been officially adopted. The dry coal preparation technology has been adopted by the coal preparation plants in various places. In China, such coal preparation technology has been adopted by the majority of coal washing plants.

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