$High alumina wear-resistant refractory brick$

High alumina wear-resistant refractory brick

High alumina wear-resistant refractory brick is a refractory material made of bauxite as the main raw material. Its alumina (Al2O3) content is usually above 48%, and it belongs to aluminosilicate refractory material. This brick has high thermal stability, high refractoriness and good slag resistance.
It is made of special grade alumina, mullite and corundum as the main raw materials, and is made by adding composite binders to strengthen the close combination of the matrix and particles, and then sintering at high temperature after high pressure molding. This product has strong corrosion resistance, high compressive strength, good thermal shock stability, good wear resistance, and anti-stripping. It is the best material for easily worn parts of the boiler. It is suitable for high temperature and wear areas such as separators, return pipes, and tail high temperature sections of circulating fluidized bed boilers.

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Description

High-aluminum wear-resistant refractory bricks are made of high-quality high-alumina vanadium clinker and high-quality burnt gemstones. Various admixtures, micro-powders and ultra-fine powders are added to the materials to improve the molding properties of the materials, so that large, medium and small particles can be made. The space can be tightly combined and the micropores are fully filled. The porosity of the product is greatly reduced and the volume density is increased. After the high-aluminum wear-resistant refractory bricks are fired by machine pressing or vibration molding, the compressive strength, wear resistance and erosion resistance are significantly improved. The high-aluminum wear-resistant refractory bricks are Bricks can be widely used in parts of circulating fluidized bed boilers with serious wear.

The mineral composition of high-alumina wear-resistant refractory bricks is corundum, mullite and glass phases. The raw materials are high-alumina bauxite and sillimanite natural ores, with the addition of fused corundum, sintered alumina, synthetic mullite, and clinker calcined with alumina and clay in different proportions. High-alumina wear-resistant refractory bricks are produced by the sintering method. But the products also include fused cast bricks, fused granular bricks, unfired bricks and unshaped refractory bricks. High-aluminum wear-resistant refractory bricks are widely used in the steel industry, non-ferrous metal industry and other industries.

project		High Aluminum Wear-Resistant-1	High Aluminum Wear-Resistant-2
Al₂O₃ %	≥	75	65
Refractoriness	℃	＞1790	＞1780
Bulk density	g/cm³	≥2.7	≥2.6
Compressive strength	MPa	＞65	＞50
Reburning line change rate	%	0.02	0.03
Thermal shock stability	次	＞25	＞20
Maximum operating temperature	℃	1550	1500
Wear resistance	cm³	＜8	＜10

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