... one in China. Our production capacity for all of products is as follows for your reference:The Limestone is more than ... the lowest price.1. Calcium carbonate product index 1) CaCO3 ≥97%,MgO ≤0.6%,SiO2 ≤1%,Fe2O3 ≤0.06%.2) ... ≤1.6%,SiO2 ≤1.4%,Fe2O3 ≤0.06%.2. Packing for our products 1) 25 kg / bag; 2) 50 kg / ... per the packing requirements from our customers. limestone purity 97% take off sulphur for steel