... and North America.Our main products are:1.Metallurgical GradeSpecification: SiO2≥ 49%,CaO≥44%,MgO≤1.7%±0.5%,Fe2O3≤0 ... adjusted according to the customer's requirements)2.Filling GradeSpecification: SiO2≥ 50%,CaO≥44%,MgO≤1.8%,Al2O3≤0.8%, LOI ... adjusted according to the customer's requirements) 3.Ceramics GradeSpecification: SiO2≥ 49%,CaO≥45%,Fe2O3≤0.3%,LOI≤2.5%325mesh ...