The stability of raw material: The raw material for GGBS, raw slag, is usually obtained from the predetermined steel plant, which ensures the stability of the raw material.
The stability of the chemical compositions: Due to the stringent quality control in producing iron and steel, the steel plant imposes strict control in the usage ratio of all materials in the iron production process. Therefore, the stability of the chemical compositions of its by-product – raw slag is under control.
With the use of the state-of-art vertical mill installed by JSW to process raw slag, the fineness of GGBS can be controlled, and therefore consistency in quality is attainable.
PFA that is collected using average techniques usually does not have the above-mentioned characteristics, and therefore presents a higher fluctuation in quality.