Chinese lime stone lump lime stone purity:98% used in paper making,rubber ,flu gas desulfurization,sewage disposalect ISO Chinese Lime stone 1 lime stone product index 1) CaCO3 ≥97%,MgO ≤0.6%,SiO2 ≤1%,Fe2O3 ≤0.06%. 2) CaCO3 ≥96%,MgO ≤1.6%,SiO2 ≤1.4%,Fe2O3 ≤0.06%. 2 Lime stone specification 1) 0 mesh---400 mesh, 2) 10mm----40mm, 3) 40mm----80mm, 4) 80mm----120mm