What is the general fineness of primary fly ash

Fly ash can be used as a concrete additive to replace part of the cement, thus reducing the cost of the project. A few days ago, there are users to consult the problem of fly ash, asking how much the fineness of the first-class fly ash, what mill equipment can be processed.

The national standard of first-class fly ash is 45 microns, that is, 325 mesh, and the sieve rate is not less than 88%. Processing of first-class fly ash can use our Raymond mill equipment, the fineness of the powder can reach about 400 mesh, and the sieve rate is up to more than 90%.

The fineness of primary and secondary fly ash is the same, both are 325 mesh, the only difference is the sieve rate, the sieve rate of secondary fly ash is required to be more than 75%. Processing both can use Raymond mill, do not need to buy other equipment.

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