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production principle of magnesia chrome brick

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production principle of magnesia chrome brick


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Discussion on the production principle of magnesia chrome brick

AOD furnace lining generally uses directly bonded MgO-Cr2O3 brick, combined with semi-re-bonded MgO-based Cr2O3 brick masonry. Directly combined with magnesia chrome refractory brick with high-quality high-purity magnesite and chrome ore at high temperature calcination, the microstructure is characterized by the formation of direct coupling between the main crystal phase, and low melting point silicate phase exists.

Combined with magnesia chrome firebrick is fused magnesia chrome sand broken, and then fired at high temperatures, which is characterized by excellent slag resistance, the use of the effect than the direct combination of magnesia chrome brick. Semi-re-combined magnesia chrome brick is a direct combination of MgO Cr brick and re-combination of magnesia chrome bricks integrated, better performance.

The Furnace with magnesia chrome brick damage causes, mainly to consider the slag infiltration and make brick body deterioration caused by structural flaking In order to improve its performance, the production of magnesium chrome brick should be considered from the following aspects:

(1) strict control of chemical composition. Cr2O3 content (in mass fraction, the same below) to 18% is better, SiO2 content against erosion of the greatest impact, its content should be as low as possible, <1% is appropriate, and should strictly control the content of calcium oxide.

(2) brick-making process to strictly control the gradation.

Yingkou Ruizhi Refractories Co., Ltd. is a professional China manufacturer of refractory material for high temperature melting furnaces.Ruizhi Refractories supply main products are: Refractory material, refractory brick, refractory castable,refractory nozzle, ceramic fiber, fire brick, insulation material, for converter, electric arc furnace, ladle, LF furnace, tundish, foundry ladle, torpedo ladle, etc. Ruizhi has established technical cooperation relationship with some refractory research institutions and universities. Ruizhi Refractories products have been exported to such as South Africa, Australia, Canada, Malaysia, Bangladesh, Iran, Saudi Arabia, UAE, Iraq, Pakistan, Philippines, Vietnam, Singapore, Tajikistan, Indonesia, South Korea, Sri Lanka, Nigeria, Kenya, Ethiopia, etc.

http://www.ruizhirefractory.com/en/product/magnesia-chrome-brick.html

Email: sales@ruizhirefractory.com

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