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Understanding of magnesia chrome brick

2019-05-22 11:40:18
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Magnesia chrome bricks are refractory products with magnesium oxide (MgO) and chromium oxide (Cr2O3) as the main components, and periclase and spinel as the main mineral components. Magnesia chrome bricks, this kind of bricks have high refractoriness, high temperature strength, strong resistance to alkaline slag erosion, excellent thermal stability, and also have certain adaptability to acid slag. The main raw materials for making magnesia-chrome bricks are sintered magnesia and chromite. The purity of magnesia raw materials should be as high as possible. The chemical composition requirements of chromite ore are: Cr2O3: 30-45%, CaO: ≤1.0-1.5%. Magnesia chrome bricks are generally produced from sintered magnesia and refractory chrome ore. The refractory grains are combined with silicate. The domestic magnesia chrome bricks generally refer to fired ordinary magnesia chrome bricks, referred to as magnesium Chrome bricks. 

The refractoriness of magnesia chrome brick is greater than 2000 ℃, the softening temperature under load is generally above 1550 ℃, the high temperature volume stability is good, and the resistance to rapid cooling and heating is stronger than that of magnesia brick. Refractory bricks can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects at high temperatures. Now with the continuous development of my country’s cement industry, refractory materials Also put forward higher requirements. The refractory industry, which has long relied on extensive economic growth, should increase its adjustment efforts to adapt to the needs of the new situation.

my country's cement industry refractories industry has problems such as low industry concentration, vicious competition, and shortage of raw material resources. Only by accelerating the reorganization and integration of cement kiln refractory materials production enterprises can we adapt to the rapid development of the cement industry. At the same time, refractory brick enterprises should also strengthen cooperation with scientific research institutes and user units, increase cooperation between production, education and research, and achieve new breakthroughs in the technology of green refractory materials, and strive to develop some key green refractory materials in a short period of time. Substantial breakthroughs have been made in technology, promotion and application. While developing green refractory materials, product quality must also be guaranteed. The main reason for the low life of refractories is that the manufacturer’s production equipment is out of date, and the friction brick press is used for molding. The automation level in the batching, molding, firing, and inspection procedures is low, the product quality fluctuates greatly, and the size deviation is large; improper masonry methods . In use, in order to prevent refractory bricks from falling off, excessive use of steel plates for locking causes great expansion of refractory materials during heating, excessive pressure damages refractory bricks, and low level of refined management.


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Mobile: 15084042222 Chairman Zhu

Mobile: 13019619166 Former Manager

URL:www.gmref.cn

Address: Fanma Village, Mafeng Town, Haicheng City, Anshan City

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