It is understood that in recent years the rapid development of Chinese thermal power, fly ash quantity increases rapidly, at the end of the 12th five-year annual output will reach 570 million tons, fly ash comprehensive utilization are faced with the situation is very grim. The latest revision of the measures for the management of comprehensive utilization of fly ash, encourage to high added value and large dosage of fly ash utilization, including support for development of alumina powder coal ash extraction of aluminium oxide and related products, support the development of mature technology of new type wall materials with high volume of fly-ash, encourage the use of fly ash as cement mixed materials instead of clay in raw meal ingredients, to encourage use of fly ash used in commercial concrete admixture, etc.
At present, the fly ash and coal gangue utilization technology overall still is given priority to with low-end construction building materials used, no significant market benefit, urgent need to speed up the fly ash and coal gangue resource based theory and technology research and development, promoting utilization ways from traditional construction building materials used mainly to multicomponent synergistic extraction, preparation of composite materials, pollution control and ecology using and other technical direction. Comprehensive utilization of fly ash in our country overall remain at about 67%, more than the United States and other developed countries, but still more prominent regional development imbalances, the current is mainly used in the production of cement, concrete and other building materials products, can be used in construction engineering, road construction, soil improvement, backfill, the production of compound fertilizer, etc.
For fly ash application the best approach is to use grinding mill for grinding processing, let it in the form of ultrafine powder into industry field, processing after the fineness of fly ash is more uniform, the surface activity is greatly increased, can be directly used for concrete and cement production, and the uniform grinding mill finished product fineness of fly ash, this is other mill equipment is difficult to have. One of the most important thing is fly ash grinding mill wear parts adopt high quality steel, adopts high-quality wear-resistant material, reliable operation. Finally, the device for dust pollution of small, low noise, small volume, easy adjustment, easy maintenance, more for the big customer obsession, has become a waste, using new technology equipment selection of the optimal solution.