Introduction of Light Burning Powder

As magnesite is generally reduced by about 50%, the content of MgO in ores can be almost doubled by light burning. In this sense, light burning of magnesia is the most effective means of MgO enrichment. In addition, light burning is also a preparatory operation for thermal separation and some gravity separation of magnesite. Light burning of magnesia has high activity and is an ideal raw material for producing high bulk density magnesia.

Light burnt magnesium mainly produces cementitious materials, such as magnesia cement, insulation and sound insulation building materials, as well as ceramic raw materials. After chemical treatment of light burnt magnesium, it can be made into a variety of magnesium salts, which can be used as raw materials for medicine, rubber, man-made fibers, papermaking, etc. Reburnt magnesium. Most of the refractories used for metallurgy are used to make magnesia bricks, chrome magnesia bricks, magnesia, metallurgical powder and fused magnesia powder. Special alloy steel, lining of medium and high frequency induction furnace for nonferrous metals and precious metals, magnesium crucible. It can also be used as high temperature electrical insulation material. The source of light burning powder is calcined magnesite.

Many people have misunderstood some truth.

1. Magnesium oxide content and activity are proportional in a certain range, in fact, there is no such strict or reliable proportional relationship;

2. It is a serious mistake to think that "beyond this range, it will be inversely proportional".

3. Magnesium oxide is now misunderstood by some people as light-burning powder, which is also a serious mistake. It should be said that the main component of light-burning powder is magnesium oxide. Light-burning powder also contains impurities such as MgCO3, Mg (OH) 2, CaO, Fe2O3, Al2O3, SiO 2 and so on. Conversely, it is a serious mistake to say that magnesia is lightly burned powder.

4. With the innovation of the times and technology, the definitions of light-burning powder and magnesite have changed greatly. The magnesite is burned in an old-fashioned kiln with dark color and high impurity content. Most of the light-burning powder is also burned by magnesite. The difference is that the light-burning powder is fired in a reflective kiln at the present stage, and the impurity content is relatively small. Qualified light-fired powder should meet the standards of WB/T 1019-2002 magnesite products light-fired magnesia and HG/T 2573-2006 industrial light magnesia. The loessial soil can not reach these standards.

In addition, there is a deep misunderstanding that the content of f-CaO in light burning powder is determined by ethylene glycol extraction method. According to the experiment, ethylene glycol also absorbs magnesium oxide. With the different extraction time, the result will be visible. This involves the correction of some national standards, which coincides with some other articles. This proposal is important, and experts can further demonstrate it.