Cement Grinding Aids

Regular Cement Grinding Aid (RGA) or in other term is called as Conventional Cement Grinding Aid) has been used for more than 40 years in the cement industry. The cement grinding aids is additional material in liquid or solid form, admixed in small amount during the cement clinker grinding process which can significantly improve the grinding efficiency and reduce energy consumption, without compromising the performance of the cement. The cement grinding is an energy intensive process. The addition of grinding aid during the process of cement grinding, results in improvement of the specific surface and grind-ability of the material ground. This is attributed to the additive’s ability to reduce resistance to comminution and to prevent agglomeration of the freshly ground particles (due to neutralization of static charges) and powder coating on the grinding media (balls) and mill liners. The overall result is the reduction in the unit energy consumption and increased mill output or increased efficiency of the mill.

In addition of the main purpose to increase the efficiency of cement grinding process (increase mill output and reduce grinding cost), some cement grinding aids are also formulated to provide important strength gain effects on the final cement product Cement grinding aids that provides these kinds of “extra” properties are called as Cement Performance Enhancer (CPE) or in other term is named as Cement Quality Improver. The high cost of clinker and the trend to reduce CO2 emission, drive the cement manufacturing to reduce clinker ratio (CR) by replacing significant percentage of clinker with lower cost filler material such as limestone or SCM material (Supplementary Cementitious Material) such as fly ash, trass and slag. This situation makes using of Cement Performance Enhancer (CPE) in cement grinding process become very important in current cement global industry. Cement Performance Enhancer (CPE) will maintain or even increase cement strength performance in lower clinker ratio (CR) composition.

Raw materials that are used to produce clinker need to be ground in order to get high level of particles fineness. Similar with cement grinding aid, grinding process efficiency of cement raw materials will also affect raw mill output. Raw materials that are used to produce clinker need to be ground in order to get high level of particles fineness. Similar with cement grinding aid, grinding process efficiency of cement raw materials will also affect raw mill output. Cement Raw Mill Grinding Aid (RM-GA) act to improve the specific surface and grind-ability index of the material ground. That is attributed to the additive’s ability to reduce resistance to comminution and to prevent agglomeration of the freshly ground particles (due to neutralization of static charges) and powder coating on the grinding media (balls) and mill liners. The overall result is the reduction in the unit energy consumption and increased mill output or increased efficiency of the mill.