The migration of impurity components such as Si, Al, Ca and Fe and the effect of melting temperature on the crystallization process of MgO are the main characteristics of fused magnesia. Finally, it is pointed out that the automation, intelligence and energy saving consumption equipment of high temperature electric arc furnace is the key point of future research and development. The preparation of high purity magnesium hydroxide from salt lake brine as intermediate and the preparation of high purity fused magnesia is the mainstream direction in the future.
Electrofused magnesia is an important industrial raw material, its consumption process is complex, mainly magnesite as raw material, using arc furnace melting method to prepare. The research effect of China's electric fusion magnesia preparation technology, ordinary electric fusion magnesia products mainly choose more than 47% content of magnesite or light burning magnesia as the main raw material in the arc at high temperature melting. Magnesite has large grain size, compact structure, strong slag resistance and superior high temperature volume shaking property. Magnesia is mainly used in primary alkaline brick, carbon products and unshaped refractory materials of good raw materials.