Sintered aluminum-chromium-zirconium sliding plate brick for copper smelting anode furnace and preparation method of sintered aluminum-chromium-zirconium sliding plate brick

Abstract

The invention provides a sintered aluminum-chromium-zirconium sliding plate brick for a copper smelting anode furnace and a preparation method of the sintered aluminum-chromium-zirconium sliding platebrick. The sintered aluminum-chromium-zirconium sliding plate brick comprises the raw materials in parts by mass: 40 to 60 parts of sintered tabular corundum particles, 10 to 20 parts of fused zirconium mullite particles, 5 to 10 parts of fused zirconia corundum fine powder, 15 to 25 parts of corundum fine powder, 2 to 6 parts of AlN fine powder, 1 to 3 parts of monoclinic ZrO2 micro powder, 5 to10 parts of alumina micro powder, 10 to 20 parts of chromium oxide micro powder, and 2 to 6 parts of a binding agent. A raw material composition system of the sliding plate brick does not contain carbon, and the problem of oxidation or galling of the plate surface of the sliding plate brick in the using process is solved; meanwhile, the AlN fine powder is introduced into the material matrix, andNO, NO2 and other gas phases are formed through oxidation in the high-temperature firing process; sintering of Cr2O3 in the material matrix is promoted; and an Al2O3 phase with quite high activity isformed in the material matrix in the oxidation process and reacts with ZrO2, Cr2O3 and the like in the raw materials to form Al2O3-ZrO2 and Al2O3-Cr2O3 solid solutions, so that the sliding plate brickhas excellent corrosion resistance and permeability of copper liquid and molten slag (FeO, SiO2 and the like).

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a fired aluminum-chromium-zirconium sliding brick for a copper smelting anode furnace and a preparation method thereof. Background technique [0002] The anode furnace is mainly used for the refining of liquid blister copper, which has the advantages of large capacity, high degree of mechanization and automation, strong controllability, and low energy consumption. It is being promoted and used by large copper smelters. In order to solve the shortcomings of large drop of copper liquid and high slag content in the initial pouring stage of the anode furnace, the use of sliding nozzles at the copper outlet is also used by more and more copper smelting manufacturers. [0003] During the refining process of liquid blister copper, the main components of the slag are FeO and SiO 2 , with low viscosity, strong erosion and penetration ability. Due to the high oxygen content ...

AI Technical Summary

Problems solved by technology

Traditional aluminum-carbon and aluminum-zirconium carbon skateboard bricks, because the material contains a high content of carbon elements, are carbon-bonded, or carbon-bonded and ceramic-bonded, and are easily oxidized and decarburized during use, resulting in slippery boards. Bricks have problems such as large hole expansion, oxidized roughening, etc., and the service life is generally 1 time

The low service life leads to a large consumption of skateboard tiles, and frequent replacement of skateboard tiles also greatly increases the labor intensity of workers

[0004] So far, there are few relevant research reports on sliding bricks used in copper smelting anode furnaces at home and abroad. Therefore, the development of sliding bricks with high service life and strong anti-oxidation and corrosion resistance for copper outlets in anode furnaces has become the current anode The key technology of controlling copper outflow from furnace copper outlet

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