DBM 95: The group of DBM grades with MgO contents of 94-95% MgO are made by two steps calcination. The first step is shaft kiln caustic calcining, followed by milling and briquetting, then sintering at over 1850°C temperature shaft kilns. Featured with good sintering and dense crystallization, it is an excellent material for making mid-range Magnesia shaped and unshaped refractory products.