If we use the ball mill to grinding the slag into slag powder, the specific surface area needs to reach 400 square meters per kilogram, if the operate process leads the specific surface area can not reach 400, we can use them into the cement test, the specific surface area of 400 activity is far greater than 350, and the strength of the cement produced also been greatly enhanced.

Adopt the slag powder made by ball mill can not only replace part of cement clinker, but also can ensure the cement strength, as for the cost, ball mill is low, the cost of slag is not high, compared to material, greatly reducing the cost of cement enterprises is a significant increase in economic efficiency. There is also a kind of practice is to first into the Kun press inside crushed, and then after the ball mill, the effect of this process grinding out the powder will be more fine, more active high.

We have compared the advantages and disadvantages of the ball mill and the press, and found that the production of the press is obvious, and the operating costs and maintenance costs are relatively low, which fundamentally reduces the cost of slag powder production.