Mainly used in improving field , additives agent , medium-low synthesized material , refractory in converter , medium-high magne 1. ISO9001 certification 2.stable quality performance, high purity, good activity. 3.annual output is 100000 tonsIt is made from magnesite ore as raw material, by calcining in rotary kiln, manufactured after fine grinding, stable quality performance, high purity, good ...