Method for producing metallic magnesium (magnesium ingot)

Firstly, the first question: Magnesium exists in magnesite MgCO3, dolomite CaMg(CO3)2 and carnallite KCl MgCl2 H2O. Magnesium metal is produced by electrolytic melting of magnesium chloride or reduction of magnesium chloride with ferrosilicon in an electric furnace. The former is called molten salt electrolysis and the latter is called silicon thermal reduction. Magnesium chloride can be extracted from seawater, which contains about 65.438+0.2 billion pounds of magnesium per cubic mile.

Extraction of magnesium from seawater

(1) CaCO3 = Cao+CO2 (high temperature)

Calcium oxide +H2O = calcium hydroxide

② Ca(OH)2+MgCl2=Mg(OH)2↓+CaCl2

③Mg(OH)2+2 HCl+6H2O = MGC L2·6H2O+2H2O

④ MgCl2 6H2O = MgCl2+6H2O (heated in hydrogen chloride gas stream to generate anhydrous magnesium chloride)

(5) magnesium chloride (melting) = = electrification = = magnesium+chlorine =

The second question: Taiyuan is the coal capital of China. In addition, efforts are being made to build the magnesium capital of the world. The magnesium industry conference was held in Taiyuan in April this year. Taiyuan Tongxiang Metal Magnesium Company, a subsidiary of Yuan Yue Group, is the largest manufacturer in the world, with an annual output of 654.38+500,000 tons of magnesium ingots. I work in this company. If necessary, you can email me at junling522@ 163.com or celiaxing@yahoo.com.