Novel process for continuously smelting magnesium metal with electric furnace

Abstract

The invention relates to a novel process for continuously smelting magnesium metal with an electric furnace. The novel process is characterized by comprising the following steps: feeding with a calcination rotary kiln, receiving materials and discharging with an insulated material tank, quantitatively sealed feeding, and smelting with the electric furnace; reducing magnesium vapor at 1550-1600 DEG C, wherein magnesium cooled by a magnesium vapor crystallizer is liquid magnesium; sucking and pouring the liquid magnesium to a magnesium receiving pot by using a vacuum suction pouring pump, and transporting the liquid magnesium in the magnesium receiving pot to a refining workshop for refining by using a battery cart; deslagging by using a forehearth which is positioned in front of the electric furnace and communicated with the electric furnace, and thus ensuring continuous deslagging in vacuum. According to the novel process, the whole production process can realize mechanization, and the main production part realizes automation control; in the whole production process, materials do not fall to the ground, the human consumption is reduced, the production efficiency is improved, powder pollution can be thoroughly removed, and the environment is improved. 7150 kilowatts are consumed per ton of magnesium, and the power consumption per ton of magnesium is reduced by 40 percent compared with the current French and American Malina method. Compared with the Pidgeon process, CO2 and SO2 emission can be reduced by 80 percent. The production efficiency is improved by 25 percent, the energy consumption is reduced by 50 percent, and the production cost is reduced by 30 percent.

Description

technical field [0001] The invention belongs to the field of metal magnesium smelting, and specifically adopts a method for smelting metal magnesium by electric furnace microwave heating. Background technique [0002] At present, the smelting processes for the production of magnesium in China and the world mainly include the Pidgeon method, the semi-continuous method (ie Magnina method), and the chlorination electrolysis method. Among them, because the electricity consumption per ton of magnesium in the chlorination electrolysis method is as high as about 20,000 degrees, the cost is too high, thus losing market competitiveness and being eliminated. The second is the Pidgeon method magnesium smelting process adopted in my country. The process is complicated, (that is, the material is calcined, then cooled to room temperature, pulverized (150-200 mesh fine powder), and then after batching, large-scale ball pressing machine pressing balls, and then Put it into a high-chromium-n...

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Problems solved by technology

Severe pollution, low thermal efficiency and high labor intensity during the smelting process

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