Preparation and smelting process of fused magnesia

Fused magnesia is mainly about the migration law of Si, Al, Ca, Fe and other impurity components and the influence of smelting temperature on the crystallization process of MgO. Finally, it is pointed out that automatic, intelligent and energy-saving high-temperature electric arc furnace production equipment is the focus of future research and development. The preparation of high-purity magnesium hydroxide from salt lake brine as an intermediate and the preparation of high-purity fused magnesia will be the mainstream direction of future development.

Fused magnesia is an important industrial raw material, and its production process is complicated. According to the research results of the preparation technology of fused magnesia in my country, ordinary fused magnesia products are mainly made of magnesite or light-burned magnesia with a content of more than 47% and melted at high temperature in an arc. The periclase has large grain size, compact structure, strong slag resistance, and superior high temperature volume volatility. The use of magnesia is mainly used as a good raw material for primary alkaline bricks, carbon-containing products and unshaped refractories