菱镁矿是冶金工业用作制造镁质耐火材料的主要原料。从菱镁矿中提炼金属镁用以制作镁合金、人造光源、脱氧剂等是国防工业的重要原料。其它在造纸、陶瓷、制糖等工业部门也有很重要的用途。冶金工业用的菱镁矿质量要求严格、数量也大。在开采的菱镁矿中,供冶金工业使用的约占90%以上,主要用作煅烧各种镁砂,从而制造各种用途的镁质耐火材料 Magnesite is the main raw material used by the metallurgical industry for the production of magnesia refractory materials. Magnesite from the extraction of magnesium for the production of magnesium alloy, artificial light source, deoxidizer is an important national defense industry raw materials. Other industries such as paper making, ceramics, sugar and other important uses. Magnesite metallurgical industry with strict quality requirements, the number is also large. In the exploitation of magnesite, for the metallurgical industry accounts for about 90%, mainly used for calcining a variety of magnesia, to manufacture various uses of magnesia refractory