Processing method of ultrafine fly ash

With the increasing attention of human beings to environmental protection, it is the development trend of my country’s building materials industry to develop new building materials to replace clay solid bricks with high energy consumption and serious damage to the ecological environment. Fly ash is fine ash collected from flue gas after coal combustion, and fly ash is the main solid waste discharged from coal-fired power plants.

The main oxide components of fly ash in thermal power plants in my country are: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2, etc. Fly ash is one of the largest industrial waste residues in my country. With the development of the power industry, the fly ash emissions from coal-fired power plants are increasing 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 the river to silt up, and the toxic chemicals in it will also cause harm to the human body and organisms.

In my country, waste recycling is currently advocated, so some derivatives produced in industrial production should be recycled. At present, fly ash is mainly used to produce fly ash cement, fly ash bricks, fly ash silicate blocks, fly ash aerated concrete and other building materials, and can also be used as agricultural fertilizers and soil conditioners , Recycling industrial raw materials and making environmental materials, there are hundreds of uses of fly ash.

Due to the sharp increase of fine particles and large specific surface area, the superfine ash increases the hydrothermal reaction phase interface, and the macroscopic performance is the increase of fly ash activity. The mechanical strength of coal ash products increases. Fly ash should be finely ground by an ultra-fine pulverizer to improve its reaction speed. The amount of cement used in this process is less, and the activity of fly ash should be maximized. Otherwise, it is difficult to ensure the strength if only 2% to 3% of cement is added. The grinding ratio is about 20% of the total amount of fly ash.

Fly ash is an active mineral fine powder resource. With the rise of grinding and processing fly ash technology, the advantages of ultra-fine pulverizers can not only ensure the quality of different varieties of fly ash supplied by power plants, but also more effectively broaden the development and utilization channels of fly ash, improve The utilization level of fly ash will further improve the economic and social benefits of the enterprise.

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