指标及规格：

Ⅰ MgO≥92%, SiO₂≤3%, CaO≤2.5%, Fe₂O₃≤0.8%, Al₂O₃≤1%, L.O.I≤5%

Ⅱ MgO≥90%, SiO₂≤4%, CaO≤2.5%, Fe₂O₃≤0.8%, Al₂O₃≤1%, L.O.I≤6%

Ⅲ MgO≥85%, SiO₂≤6%, CaO≤4%, Fe₂O₃≤1%, Al₂O₃≤1%, L.O.I≤8%

粒度：粉末或颗粒