Fly ash is fine ash collected from the flue gas after coal combustion. The fly ash is the main solid waste discharged from coal-fired power plants. Fly ash is one of the industrial wastes with large displacement in China. With the development of the power industry, the amount of fly ash discharged from coal-fired power plants has increased year by year. If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause siltation of the river, and the toxic chemicals in it will cause harm to human body and organisms.

The comprehensive utilization of fly ash, turning waste into treasure and turning harm into profit has become an important technical and economic policy in China's economic construction. It is an important means to solve the contradiction between China's power production environmental pollution and lack of resources. One of the tasks that production is facing.

Adding fly ash to concrete saves a lot of cement and fine aggregate; reduces water consumption; improves the workability of concrete mixture; enhances the pumpability of concrete; reduces creep of concrete; reduces hydration Thermal and thermal expansion; improve the impermeability of concrete; increase the modification of concrete.

All of the above conditions have become the main force for the re-processing of fly ash. Based on the principle of energy saving, environmental protection and sustainable development, the solution to the treatment of fly ash by high-pressure mill will cover the field of fly ash treatment in power plants in China.

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