• Wholesale Black Synthetic Corundum Manufacturers –  Chromium Corundum Refractory Products  – Wanyu

Wholesale Black Synthetic Corundum Manufacturers – Chromium Corundum Refractory Products – Wanyu

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Wholesale Black Synthetic Corundum Manufacturers – Chromium Corundum Refractory Products – Wanyu Detail:

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The raw material used in the chromium corundum series products is a solid solution synthesized by high-temperature melting of alumina and chromium oxide in a certain proportion. The main raw material is high bauxite (or industrial alumina) by adding appropriate amount of chromite and reducing it. The agent is melted at a high temperature in an electric furnace, and the molten chromium is poured into the mold to be slowly cooled, and then it is made after annealing. .

Chromium corundum refractory products fused cast chrnmecorundum refrac-tory is also called fused cast chrnmecorundum refrac-tory. A fused cast refractory product composed of a solid solution of alumina and chromium oxide and a small amount of spinel, which contains 60% to 87% of alumina and 30% of chromium oxide. The bulk density is 3.2-3.9g/cm3;, the high temperature strength is higher, compared with other types of corundum refractories, the corrosion resistance of glass melt is the strongest. It can be used as the lining of the kiln that is in direct contact with the molten glass.

Chromium corundum refractories are widely used in the lining of coal-water slurry pressurized gasifier, ladle refining furnace and carbon black reactor lining, petrochemical industry slag gasification furnace lining and glass melting furnace lining, etc., and can also be used for heating The chrome corundum platform brick for furnace is an indispensable material in high temperature industry.

AL203 and Cr2O3 belong to the corundum structure, the radius of Cr3+ is 0.620, and the radius of AL3+ is 0.535. According to the empirical formula:
Chromium Corundum Refractory

Since the difference between Cr3+ and AL3+ ion radii is less than 15%, Cr ions can continuously and infinitely replace AL in the AL203 lattice, forming an infinite continuous replacement solid solution.

The crystal structure of Cr203 and AL203 are the same, and the ionic radius differs by 13.7%. Therefore, Cr203 and AL203 can form an infinite solid solution at high temperature. From the perspective of the liquid-solid phase line, with the increase of Cr203 content, the temperature at which the liquid phase begins to appear also rises. Therefore, adding an appropriate amount of Cr203 to AL203 can significantly improve the mechanical properties and high-temperature service performance of corundum refractories

Cr203 can form a high melting point compound or a eutectic with a higher melting temperature with many common oxides. For example, FeO·Cr203 spinel produced by Cr203 and Feo has a melting point as high as 2100℃; Cr203 and AL203 can form a continuous solid solution. In addition, Cr203 can also greatly increase the viscosity of the slag and reduce the fluidity of the slag, thereby reducing the corrosion of the slag to the refractory. Therefore, adding an appropriate amount of Cr203 to the refractory material can significantly reduce the structural spalling of the furnace lining material caused by slag erosion. There is no obvious regularity between the corrosion ability of slag to chromium corundum refractories and the basicity of slag.

The chromium corundum brick made of chromium corundum refractory material is in the furnace. When the slag basicity is 2, the chromium corundum brick has the best resistance to iron slag corrosion; when the slag basicity is 0.2, the corrosion depth of the copper slag to the chromium corundum brick The smallest; when the slag basicity is 0.35, the corrosion depth of tin slag to the chrome corundum brick is the smallest; when the lead slag basicity is 0.3, the thickness of the residue is the largest and the depth of the reaction layer, the erosion layer and the penetration layer is the smallest. When the slag alkalinity is 0.37, the corrosion resistance of chrome corundum bricks is the best.


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Wholesale Black Synthetic Corundum Manufacturers –  Chromium Corundum Refractory Products  – Wanyu detail pictures

Wholesale Black Synthetic Corundum Manufacturers –  Chromium Corundum Refractory Products  – Wanyu detail pictures

Wholesale Black Synthetic Corundum Manufacturers –  Chromium Corundum Refractory Products  – Wanyu detail pictures

Wholesale Black Synthetic Corundum Manufacturers –  Chromium Corundum Refractory Products  – Wanyu detail pictures


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We hold strengthening and perfecting our items and repair. At the same time, we get the job done actively to do research and progress for Wholesale Black Synthetic Corundum Manufacturers – Chromium Corundum Refractory Products – Wanyu , The product will supply to all over the world, such as: Manila, Niger, UK, We solution have passed through the national skilled certification and been well received in our key industry. Our specialist engineering team will often be ready to serve you for consultation and feedback. We've been able to also provide you with no cost samples to meet your needs. Best efforts are going to be produced to supply you the very best service and solutions. For anyone who is considering our business and solutions, please speak to us by sending us emails or get in touch with us right away. As a way to know our items and enterprise. lot more, you'll be able to come to our factory to find out it. We'll constantly welcome guests from around the globe to our firm. o build enterprise. elations with us. You should really feel absolutely free to make contact with us for small business and we believe we'll share the top trading practical experience with all our merchants.
  • In China, we have many partners, this company is the most satisfying to us, reliable quality and good credit, it is worth appreciation.
    5 Stars By Alice from Karachi - 2017.10.25 15:53
    It's really lucky to find such a professional and responsible manufacturer, the product quality is good and delivery is timely, very nice.
    5 Stars By Deirdre from Puerto Rico - 2017.03.28 16:34
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