MgO Magnesiunmagnesiumarbonite is widely used in metallurgy, chemical industry, building materials and other industries. The electrolysis method is widely used in the metallurgical industry for the preparation of magnesium metal. The electrolytic preparation of magnesium materials is divided into a pure magnesium process and a magnesium alloy process. In the pure magnesium process, Pidgeon magnesium ore is usually used as a raw material. Pidgeon magnesium ore is a generic term for magnesium ores such as magnesite ore (MgCO3), dolomite ore (MgCO3•CaCO3), sea-rich brine and sea-rich layer ore. The ore is smelted with coal and calcium-magnesium alloy produced by calcium carbide method to remove impurities and then calcined to form magnesia ore.
The magnesia ore is then pressed into pellets and preheated in a suitably sized furnace. The pellets are then heated in an electric arc furnace between 800 and 1100°C. As the ferrosilicon alloy (mainly FeSi) used for silicon correction and the carbon used for reduction are added to the furnace, the ores reduce to basic magnesium, MgO is dissolved in molten iron, and some of the molten ore is oxidised to MgO under the action of the arc. At this time, the voltage must be adjusted according to the amount of reducing agent added and the temperature of the furnace. The current is usually adjusted between 20,000 and 25,000 amperes.
As the process progresses, the furnace is filled with slag, which is skimmed off at regular intervals to maintain the operating requirements of the furnace. The slag is processed to obtain ferrosilicon and the magnesium metal is smelted with the ferrosilicon calcium si and the magnesium metal is separated from the slag. After the furnace is cooled, the metal and slag are poured out of the bottom of the furnace, and the metal is cast into roughs for deep processing. After being broken down, the metal is processed into magnesium ingots in a continuous casting machine.
The electrolysis of magnesia for the production of magnesium alloys is roughly the same as that of pure magnesium. The main difference between them is that in the electrolytic process of alloy magnesium, trace elements are added to the electrolytic cell to adjust the alloys components and performance. The alloy ingredients can be add according to the specific requirements of the user.
The electrolytic process of magnesia not only has the advantages of small energy consumption, high economic efficiency but also can improve the useful performance of the alloy and reduce the cost, so as to meet the use of magnesium alloy in different fields. At the same time, the production of alloy magnesium electrolysis can also be completed in one process, which saves the production site and reduces the cost.
