Sintered aluminum chromium zirconium sliding brick for copper smelting anode furnace and preparation method thereof

Abstract

The present application provides a fired aluminum-chromium-zirconium sliding brick for a copper smelting anode furnace and a preparation method thereof. In terms of parts by mass, the raw materials of the fired aluminum-chromium-zirconium sliding brick include: sintered plate-shaped corundum particles: 40-60 parts; fused zirconia mullite particles: 10-20 parts; fused zirconia corundum fine powder: 5-10 parts; corundum fine powder: 15-25 parts; AlN fine powder: 2-6 parts; monoclinic ZrO 2 Micro-powder: 1-3 parts; alumina micro-powder: 5-10 parts; chromium oxide micro-powder: 10-20 parts; binder: 2-6 parts. There is no carbon in the raw material composition system of the sliding brick of the present application, and there will be no problem of oxidation or roughening on the surface of the sliding brick during use; at the same time, the AlN fine powder introduced in the material matrix is ​​oxidized to form NO during the high-temperature firing process. , NO 2 and other gas phases to promote Cr in the material matrix 2 o 3 sintering, and the formation of highly active Al in the material matrix during the oxidation process 2 o 3 phase, and the ZrO in the raw material 2 、Cr 2 o 3 and other reactions to form Al 2 o 3 -ZrO 2 、Al 2 o 3 -Cr 2 o 3 Solid solution, so that the skateboard brick has excellent resistance to copper liquid and slag (FeO, SiO 2 etc.) erosion and permeability properties.

Description

Technical field [0001] The present invention relates to the field of refractory materials, and,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Background technique [0002] The anode furnace is mainly used for the refining of liquid thick copper, with high capacity, high mechanization, strong controllability, low energy consumption, etc., is being promoted by large refining copper. In order to solve the expansion of the anode furnace in the initial copper fluid, the slag content is short, and the sliding water in the copper is used to use the sliding water in the copper. [0003] Liquid crude copper in the refining process, the main components of slag are FeO and SiO 2 The viscosity is low, erosion, and strong infiltration. Due to the high oxygen content in the copper fluid, the copper time of each furnace is generally 6 ~ 7 hours, and the copper fluid is particularly severe during the casting process of copper fluid, and copper water and slag have the skateboard. The erosion and penet...

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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