The national state-owned coal mine, the existing more than 1500 seats, coal gangue accumulation volume of 3 billion tons. Of coal gangue heap, pressure of land, not only affect the ecological environment, soil and groundwater pollution, also emit toxic gases, so the recovery of coal gangue is imperative.

Shanghai Clirik Sand Making production line, used for processing coal gangue, coal gangue can be ground into a super fine powder, the effective recycling, makes the coal gangue is the most commonly used to produce cement.

Coal gangue in silica, ferric oxide, total 3 oxidation 2 aluminium content over 80%, it is a kind of natural clay raw material, can be used to fire ordinary Portland cement, special cement and clinker cement and other building cement special purposes.

Coal gangue can replace clay some or all of the components of the production of ordinary cement. Or artificial burned coal gangue spontaneous combustion, has a certain activity, can be used as the activity of cement mixed material, the production of ordinary Portland cement (content less than 20%), pozzolanic cement (20 ~ 50%) content and low clinker cement (content more than 50%).

Ultrafine coal gangue powder can also be directly with lime and gypsum in an appropriate ratio, ground into cement clinker, can be used as cement by boiling or with stones, boiling furnace slag for slag as aggregate thickness of aggregate is made of concrete block or concrete hollow block and other building materials. Britain, Belgium and other special state-owned coal gangue instead of the siliceous raw material to produce cement factory.

Coal gangue can be used to sinter lightweight aggregate. Japan in 1964 using coal gangue as the main raw material in the manufacture of lightweight aggregate, used to build high-rise buildings, building a 20% reduction in weight.

In recent years, the coal gangue is no longer just be seen as a number of the largest industrial solid waste, and as a resource, in chemical industry, building materials, metallurgy, light industry and other fields has been widely research and application of coal gangue resource has become a focus in the study of comprehensive utilization of coal gangue. After superfine mill  processing coal gangue cement production, is a kind of coal gangue used only way, in the future will continue to expand the application of coal gangue field.

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