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

An alumina and rotary kiln technology, which is used in the preparation of refractory materials for high-end aluminum smelting and in the field of microcrystalline alumina. problems, to achieve the effect of improving life, reducing pores, and good wear resistance

Active Publication Date: 2021-07-23
SHANDONG LUMING HIGH TEMPERATURE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0069] A method for preparing the lining of a high-temperature microcrystalline alumina rotary kiln with platy corundum and mullite composite prefabricated parts comprises the following steps:

[0070] (1) Weigh and prepare raw materials;

[0071] (2) Mix the prepared raw materials evenly, add water accounting for 4-6wt% of the total weight of the raw materials, and stir evenly in an environment with a normal temperature of 5-25 degrees Celsius;

[0072] (3) pour the mixed material mixed with water into the model to obtain the billet;

[0073] (4) Pass the billet through the low-temperature baking machine until it is finalized, and then transport it to the demoulding mechanism for demoulding operation;

[0074] Wherein, the raw material described in the step (1) comprises the following components according to the parts by mass:

[0075] Tabular alumina particles with a particle size of 10-5mm 10-20wt%;

[0076] Tabular alumina particles with a particle size of 5-3mm 10-20wt...

Embodiment 2

[0100] like Figure 1-4 As shown, in this embodiment, the demoulding mechanism includes a demoulding frame, a feeding function part, a demoulding function part and a material distribution function part, and the feeding function part, the demoulding function part and the material distribution function part are composed of the former Installed on the demoulding frame in reverse order, the upper material receiving station of the feeding function part is connected with the discharge end conveyor belt of the low-temperature baking machine; the lower material receiving station of the feeding function part, the demoulding function part and the branch The lower distributing stations of the material function part are connected by the lower conveyor belt; the upper distributing stations of the material distribution function part are connected with the upper conveyor belt.

[0101] The feeding function part includes a front turning conveying device, and the front turning conveying device...

Embodiment 3

[0111] like Figure 5-7 As shown, in this embodiment, the front overturning drive device and the rear overturning drive device both include a group of overturning functional bodies; For the vertical plate, open a "﹛"-shaped reversing guide groove on the vertical plate of the guide rail.

[0112] Both the front flip arm and the rear flip arm include a first connecting rod, a second connecting rod and a third connecting rod; a guide slider is inserted in the reversing guide groove, and the extended end of the guide slider is vertically connected to the second connecting rod. One end of a connecting rod, the other end of the first connecting rod is vertically connected to one end of the second connecting rod, the other end of the second connecting rod is vertically connected to the third connecting rod, before the other end of the third connecting rod is connected and fixed, flip the suction cup or The rear flip suction cup, the front flip suction cup and the rear flip suction c...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101F27D1/10
CPCC04B35/101F27D1/10C04B2235/3418C04B2235/447C04B2235/96C04B2235/9607C04B2235/9669Y02P20/10
Inventor 傅修文鲍石鹏李畅王秀马朋朋
Owner SHANDONG LUMING HIGH TEMPERATURE MATERIAL TECH
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