Brief Introduction of Light Burning Powder

Magnesite calcined at 750-1100℃is called light burn, and its products are called light burn magnesia powder, which is called light burn powder. Light-burned powder is mainly used to make cementitious materials, insulation and sound insulation of building materials, also can be used as ceramic raw materials.   [1]  

mistaken ideas

1.The content and activity of magnesium oxide are proportional to each other within a certain range.There is no such strict or reliable proportional relationship.

2、It is a grave mistake to think that beyond this range is inversely proportional.

Magnesium oxide is now misunderstood by some as a light powder, but also a serious mistake. It should be said that the main composition of the powder is magnesia, The powder also contains impurities such as MgCO_3, Mg (OH)_2, CaO, Fe_2O_3, Al_2O_3 and SiO_2. Conversely, it would be a grave mistake to refer to magnesium oxide as pulverized.

With the development of the times and technology, the definitions of light-burned powder and magnesite have changed greatly. Magnesite is made from old-fashioned earthen kiln, The color is dark, the impurity content is particularly high, and the light calcined powder is mostly made of magnesite. The difference is that the light calcined powder is fired by reflective kiln at this stage, and the impurity content is relatively small. Qualified light calcined powder shall meet the standards of Light Calcined Magnesium Oxide for WB/T 1019-2002 Magnesite Products and HG/T 2573-2006-Industrial Light Magnesia. Caltropite cannot reach these standards.

In addition, there is a deep mistake. Determination of f-CaO in Light Burned Powder by Ethylene Glycol Extraction, According to the experiment, ethylene glycol also absorbed magnesium oxide, which had a visible effect on the results as the extraction time changed, which related to the correction of some national standards, which was also in line with some other articles. This proposal is important and could be further substantiated by experts.

use

Because magnesite consumption is about 50, the content of MgO in the ore can be increased almost 1 times by light burning. In this sense, light burning is the most effective way to enrich MgO. In addition, the light burn is also the magnesite heat separation and some re-election preparation work. The light-burned magnesia has high activity and is an ideal material for producing high-density magnesia.

Light-burned magnesium is mainly used to make cementitious materials, such as magnesium-containing cement. Insulation and sound insulation of building materials can also be used as ceramic materials. After chemical treatment of light-burned magnesium, a variety of magnesium salts can be prepared and used as raw materials in medicine, rubber, man-made fibers, papermaking, etc. Heavy-burned magnesium; mostly used as a metallurgical refractory; used in making magnesia bricks. Chrome magnesia brick, magnesia, metallurgical powder and electric melting magnesia are mainly used for smelting special alloy steel. Medium and high frequency induction furnace lining and magnesium crucible for nonferrous and precious metals. It can also be used as high temperature electrical insulation. The source of the light-burned powder is calcined magnesite.