Many people say if there is too much SiO2 contains in slag, it must be acidic, if contains Al2O3 and CaO much will be identified as alkaline slag. The activity of alkaline slag is much higher than that of acid slag, and slag is not suitable for long-term storage as for its basic properties. Slag production line is mainly used for industrial production, cement production and new energy production, etc.

Slag is also called granulation blast furnace slag, which is melt material made from casting iron when the exclusion of calcium silicate and calcium aluminate, after the quenching process to form the active material, which generally will contain 80 ~ 90% of the glass phase, the group of ingredients will contain calcium alum yellow feldspar (C2AS), calcium feldspar (CAS2) magnesium yellow feldspar (C2MS2), dicalcium silicate (C2S).

Slag chemical formula is very simple SiO2 25 ~ 40%, FeO 0.5 ~ 1%, Al2O3 6 ~ 15%, CaO 35 ~ 45%. Slag quality coefficient is CaO + MgO + AL2O3) / (SiO2 + MnO + TiO2), the larger the coefficient, the higher slag activity. Professional point is that when the SiO2 content and CaO, Al2O3 content of high slag when the high activity. And nowadays, according to China's standard GB / T203 requirements of concrete and cement contained in the granulated blast furnace slag coefficient can not be greater than 1.2, MnO, the content can not exceed two percent.