Chinese name：水菱镁石
English name: Hydromagnesite
Definition：Hydromagnesite is a kind of magnesium-containing non-metallic ore newly discovered in the area of Bangor Lake in Tibet in recent years.
Messi Biology said, hydromagnesite whose main component is 3MgCO3-Mg(OH)2-3H2O, belongs to a rare natural hydrated alkali magnesium carbonate ore in the world, in addition contains Fe2O3, SiO2 and other impurities; white appearance, formed by the small spherical block, lighter, harder, porous, put into water with small bubbles floating. It is a unique ore containing magnesium, the actual reserves of more than 100 million tons. Due to the geographical and traffic reasons, it has not been developed and utilized; the production of magnesium material from water magnesite is not reported at home and abroad.
Features.
1) High magnesium content, in the proven magnesium-containing non-metallic ore after hydromagnesite, magnesite, magnesium olivine, ranked fourth;
(2) Contains low impurities, is one of the pure MgO ore;
(3) After calcination, except for the original impurities, the product is solid MgO, the gas is H2O and CO2, no harm to the environment, is a green product;
(4) water magnesite contains a small amount of CaO, hydrochloric acid insoluble matter and trace Fe, Mn and other impurities, its application generally does not affect, such as the manufacture of high-purity products, the above impurities are also easy to remove, because the content is not high, more convenient refining, the cost is also low, so water magnesite is also the manufacture of high-purity magnesium materials of high quality raw materials;
(5) water magnesite is a natural hydrated alkaline magnesium carbonate, with some characteristics of light magnesium carbonate, such as the need for alkaline filler and flame retardant, reinforcement, desulfurization, dephosphorization and other occasions can use the product.
Physical and chemical properties.
1.1 Water magnesite physical properties parameters are shown in Table 1.
Water magnesite when heated to 340 ℃ weight loss of 15.61%, 477 ℃ weight loss of 25.55%, 727 ℃ weight loss of 15.00%. From the molecular formula can be learned: MgO accounted for 43.96%, H2O accounted for 19.38%, which combined with water accounted for 14.84%, CO2 accounted for 36.26%. Water magnesite has: (1) high magnesium content, in the proven magnesium-containing non-metallic ore after hydromagnesite, magnesite, magnesium olivine, ranked fourth; (2) contains low impurities, is one of the ores containing pure MgO; (3) after calcination, in addition to impurities, the product is solid MgO, the gas is H2O and CO2, no harm to the environment, is a green product, but also environmentally friendly products; (4) water magnesite Contains a small amount of CaO, insoluble matter of hydrochloric acid and trace Fe, Mn and other impurities, which generally does not affect its application; (5) water magnesite is a natural hydrated alkali magnesium carbonate, with some characteristics of light magnesium carbonate.
1.2 Water magnesite chemical composition...
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