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The production process of fused magnesia is short and simple, but the equipment investment and resource consumption are high. The electric fused magnesia industry in China mostly uses electric arc furnace to melt natural magnesite ore to prepare electric fused magnesia. The production technology and equipment are backward, with low power, small capacity, low efficiency and low automation. The produced electric fused magnesia products have low grade, resulting in low utilization rate of magnesium resources and serious environmental pollution.

The main raw material for producing fused magnesite in China is magnesite. The current production process is divided into one-step melting method and two-step calcination melting method. The one-step melting method is made of natural magnesite ore or purified Magnesite concentrate powder as raw material by melting at a high temperature above 2800 ℃ in an electric arc furnace; The two-step calcination and melting method is to light burn magnesite ore or purified Magnesite concentrate powder in a shaft kiln or Rotary kiln at about 1000 ℃ to obtain light burned magnesia powder, then fine grind, compact, and finally melt in an electric arc furnace at high temperature to obtain fused magnesia.