Magnesite, dolomite and sea water are the main raw materials to produce magnesium oxide. Thermal decomposition of magnesite or dolomite magnesium oxide. China mainly to magnesite, dolomite, brine or salt blocks for raw materials are highly fire-resistant insulation magnesia. Ignition temperature above 1000 degrees can be transformed into a crystal, rose to more than 1500 degrees and into dead-burned magnesium oxide (also known as the magnesia) or sintered magnesia. Our factory is a flower magnesite