What are the specific uses of fly ash?

Fly ash is rich in resources, cheap in raw materials, and contains a large number of active ingredients. After processing, it can be reused in building materials, concrete, chemical industry and other fields.

1. Fabrication of concrete and cement

After separation and grinding, fly ash can be used as a partial substitute for concrete raw materials. Different mixing amount will affect the hardening level, strength, drying shrinkage and other characteristics of concrete. The technology of making cement with fly ash has been relatively mature, and the mixing amount of the cement can reach 75%.

2. Making building materials and brick products

The raw materials such as fly ash can be processed through a series of processes to make different concrete blocks, such as aerated concrete brick, fly ash concrete small hollow block, fly ash brick, etc.

3. For chemical industry

High purity alum can be extracted from fly ash, which can be used to synthesize bauxite, and can also be used to prepare SiC powder, a non oxide ceramic material. After a certain refinement of fly ash, it can be made into a polymer filling material, and the synthetic material can be modified.

4. Making agricultural fertilizer and improving soil

Fly ash is rich in trace elements, such as silicon, boron, sulfur, zinc, copper, calcium, magnesium, iron, etc. its texture is loose, which can significantly improve the soil structure. Compound fertilizer can be prepared by adding an appropriate amount of additives according to the scientific formula.

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