Preparation method of lining for microcrystalline aluminum oxide high-temperature rotary kiln

Abstract

The invention relates to a preparation method of a lining for a microcrystalline aluminum oxide high-temperature rotary kiln, and belongs to the technical field of preparation of refractory materials for microcrystalline aluminum oxide and aluminum high-end smelting. The preparation method is characterized by comprising the following steps: weighing raw materials, mixing, adding water and stirring, pouring and molding, and baking at low temperature until shaping. According to the invention, corundum and mullite are fully utilized as main raw materials, part of additives are added as auxiliary raw materials, and the prefabricated part is cast, so that the problems that a refractory material in a high-temperature aluminum oxide rotary kiln with harsh microcrystalline aluminum oxide calcination conditions is resistant to high temperature, not eroded and worn, small in hot and cold state volume change, short in service life of a lining of the rotary kiln and the like are mainly solved; and the high-performance rotary kiln prefabricated part lining is prepared. The prepared rotary kiln prefabricated part lining has the advantages of being good in abrasion resistance and erosion resistance and small in volume change at the high temperature in the new field of microcrystalline aluminum oxide calcination, the problems that in the using process, the service life is short, and the lining is frequently replaced are solved, the labor intensity is correspondingly reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of refractory materials for high-end smelting of microcrystalline alumina and aluminum, and in particular relates to a method for preparing a microcrystalline alumina lining for a high-temperature rotary kiln. Background technique [0002] At present, there are many alumina calcining, lime, and pellet rotary kilns in China, and aluminum-silicon-based fired bricks or prefabricated parts are generally used as linings. In the new field, microcrystalline alumina calcination has just begun, and calcined microcrystalline alumina high-temperature rotary kilns Corresponding refractory materials for kilns must also catch up. Under the high-temperature conditions of alumina calcination, there are strict requirements on the high-temperature performance and composition of refractory materials in the reaction atmosphere of the kiln lining, so the configuration of refractory materials must be designed accord...

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Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a method for preparing a microcrystalline alumina high-temperature rotary kiln lining, which can not only use high-purity tabular corundum and mullite to prepare the rotary kiln lining, but also has high temperature resistance and corrosion resistance And the characteristics of good wear resistance and non-ringing solve the problems of microcrystalline alumina high-temperature rotary kiln lining not resistant to erosion, low scouring service life and small pollution, and improve production efficiency; in addition, it can also be used in the preparation process because The influence of wear of refractory materials on microcrystalline alumina products during use, so fully consider the compound preparation of plate-shaped corundum and mullite according to certain components and the position of the prefabricated parts of these two components in the high-temperature rotary kiln.

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