Aluminum-chromium-zirconium composite air bricks and manufacturing method thereof

Abstract

The invention discloses aluminum-chromium-zirconium composite air bricks and a manufacturing method thereof, and relates to industrial bricks and a manufacturing method thereof. Each brick comprises the following chemical components in percentage by weight: more than or equal to 72 percent of Al2O3, more than or equal to 15 percent of Cr2O3, more than or equal to 4 percent of ZrO2, more than or equal to 5 percent of mullite, more than or equal to 3 percent of TiO2, and more than or equal to 1 percent of Fe2O3. The aluminum-chromium-zirconium composite air brick comprises the following process steps: crushing a raw material chrome corundum until the largest granule has the grain size of less than or equal to 5mm; performing deironization, magnetic separation and sieving, and feeding granules with the grain size of 0.5 to 5mm into a blender mixer to mix the granules and zirconium oxide, rutile, mullite and a binding agent; grinding granules with 0 to 40 meshes into granules of -320 meshes, performing magnetic separation and deferrization on the granules, mixing the granules and the zirconium oxide, rutile, mullite and the binding agent, standing for 25 minutes and performing brick-pressing operation; and drying the bricks at the temperature of 40 DEG C, and firing the bricks in a high-temperature kiln at the temperature of between 1,600 and 1,800 DEG C. The aluminum-chromium-zirconium composite air bricks are applied to an airheater in oil field, a scrap metal incinerator and a copper converter, and the service life of the furnaces is improved.

Description

technical field [0001] The invention relates to an industrial brick and a manufacturing method thereof, in particular to an aluminum-chromium-zirconium composite air-permeable brick and a manufacturing method thereof. Background technique [0002] The breathable bricks used in ladle bottom blowing furnace, petroleum hot blast furnace, industrial waste incinerator and other processes have poor comprehensive performance, and improper material selection directly affects the service life. The pores are too high, the thermal shock resistance is poor, and the corrosion resistance is poor. , the poor performance of anti-FeO slag directly affects the profit of the enterprise, and also greatly wastes resources. Contents of the invention [0003] The object of the present invention is to provide a kind of aluminum-chromium-zirconium composite ventilating brick and its manufacture method, and the raw material of ventilating brick is by (Al 2 o 3 .C r2 o 3 ) eutectic and Z r o 2...

AI Technical Summary

Problems solved by technology

[0002] The breathable bricks used in ladle bottom blowing furnace, petroleum hot blast furnace, industrial waste incinerator and other processes have poor comprehensive performance, and improper material selection directly affects the service life. The pores are too high, the thermal shock resistance is poor, and the corrosion resistance is poor. , the anti-FeO slag performance is poor, which directly affects the profit of the enterprise, and also greatly wastes resources

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