Preparation of Light Burning Powder

Preparation of Light Burning Powder

1. Soda-soda process

First, bittern was diluted to about 20 degrees and added to the reactor. Under stirring, soda clarification solution at about 20 degrees was slowly added. Light burning powder was reacted at about 55 degrees to form heavy magnesium carbonate. After washing and centrifugal separation, it was roasted at 700-900 degrees. After crushing and air separation, light burning powder was prepared.

2. Hydrochloric acid method

Magnesium chloride hexahydrate is formed by adding hydrochloric acid to react with the waste material of producing heavy magnesium oxide. Then sodium carbonate is added to react to form basic magnesium carbonate. After washing with water, basic magnesium carbonate is calcined at high temperature and crushed after cooling to produce magnetic light burning powder.

3. Gas phase method

The high purity magnesium and oxygen were reacted to form nuclei, and then the particles continued to grow to produce high purity light burnt powder. Crude raw materials containing more than 80% magnesium oxide (by weight) are dissolved in inorganic acids (sulfuric acid, hydrochloric acid, nitric acid) at a molar ratio of 1:2 to form magnesium salts of inorganic acids. The impurities were removed by refining, heated under pressure in oxygen atmosphere, then washed, dehydrated and dried, and heated at 1100 C for 1 hour to produce high purity light burning powder.

4. Satin firing

Magnesium hydroxide calcination

Magnesium (OH) 2 was precipitated from purified magnesium sulfate solution by adding pure ammonia water as precipitant. The cake was washed to obtain high purity Mg (OH) 2 by plate and frame filter press, and then dried and calcined to produce high purity light burning powder.

Bitter soil powder calcination method

Bitter soil powder is washed by water, impurities are removed and precipitated into magnesium slurry. Then magnesium hydroxide is dehydrated to form light burning powder by digestion, drying and calcination.

Magnesite Satin firing method

The magnesite was calcined in a forging furnace at 950 C, then cooled, screened and crushed to produce light burning powder.

Dolomite forging method

Active light-burning powder can be prepared from dolomite by calcination, digestion with water, carbonation, calcination and crushing.