What are the production methods of magnesium metal?
There are many countries producing magnesium metal, such as the United States, Russia, Norway, Canada and China. In the process of production, all countries adopt magnesium smelting methods suitable for their own minerals and energy resources. At present, most countries use dolomite to produce magnesium metal. Methods of producing magnesium metal include molten salt electrolysis and thermal reduction. The direct raw material of the former is magnesium chloride, and that of the latter is magnesium oxide.
There are many ways to produce magnesium metal by electrolysis, and magnesium chloride is used as direct raw material to produce magnesium metal. In the case of dolomite (which produces magnesium with low environmental pollution), magnesium oxide is first produced by electrolysis. Anhydrous magnesium chloride was obtained by rechlorination, and magnesium metal was finally prepared by electrolysis. Such as Dow company with seawater sintering dolomite into mud, precipitation Mg(OH)2; Then it reacts with hydrochloric acid to produce MgCl2, and then it is heated and electrolyzed by adding other substances to prepare magnesium metal.
Norway bossglon plant to dolomite and seawater as raw materials to produce magnesium oxide, and then together with coke, magnesium chloride brine into balls, after drying in the chlorination furnace to produce magnesium chloride. And then in the temperature of 750℃ by solution by solution to prepare all magnesium, other electrolytic production of metal magnesium methods there are many, not one introduction.
The basic principle of magnesium smelting by silicon thermal method is to mix ferrosilicon with calcined dolomite ore and press it into small pieces, which are put into steel distillation bottle. Under certain temperature and corresponding vacuum conditions, silicon reduces magnesium oxide to produce magnesium metal vapor, and then crystallized magnesium is obtained by condensation
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