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当前能源日益短缺能状况,促使采矿技术不断改进,并要求尽量减少选煤中的浪费现象。由于高质量煤层日益减少,及使用现代化的采煤设备而使原煤中的未煤量大大增加,因此,从原煤中最大限度地回收适合市场销售的产品就变得更加困难。粉煤在过去往往丢失于
The current shortage of energy has led to continuous improvements in mining technology and calls for minimizing waste in coal preparation. Due to the declining quality of coal seams and the use of modern coal mining equipment, the amount of unburned coal in raw coal is greatly increased, thus maximizing the recovery of products suitable for market sale from raw coal. Pulverized coal is often lost in the past