A kind of preparation method of inner lining for microcrystalline alumina high temperature rotary kiln

A kind of alumina and rotary kiln technology, applied in the direction of overall lining, chemical industry, sustainable manufacturing/processing, etc., can solve the problems of low pollution, low scouring service life, and the lining of microcrystalline alumina high-temperature rotary kiln is not resistant to erosion, etc. , to achieve the effect of improving life, reducing pores and good wear resistance

Active Publication Date: 2022-08-09
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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  • A kind of preparation method of inner lining for microcrystalline alumina high temperature rotary kiln
  • A kind of preparation method of inner lining for microcrystalline alumina high temperature rotary kiln
  • A kind of preparation method of inner lining for microcrystalline alumina high temperature rotary kiln

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Effect test

Embodiment 1

[0069] The preparation method of a tabular corundum and mullite composite prefabricated lining for a high-temperature microcrystalline alumina rotary kiln according to the present invention comprises the following steps:

[0070] (1) Weighing and preparing raw materials;

[0071] (2) Knead the prepared raw materials evenly, add 4-6wt% of the total weight of the raw materials, and stir evenly in an environment at room temperature of 5-25 degrees Celsius;

[0072] (3) Pour the mixed material mixed with water into the model to obtain a blank;

[0073] (4) The blanks are baked at a low temperature until they are shaped, and then transported to the demolding mechanism for demoulding;

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

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

[0076] Tabular corundum particles with a particle size of 5-3mm are 10-20wt%;

[0077] 10-20wt% o...

Embodiment 2

[0100] like Figure 1-4 As shown in the figure, in this embodiment, the demoulding mechanism includes a demoulding frame, a feeding functional part, a demoulding functional part and a material distributing functional part. It is installed on the demoulding frame in sequence backwards. The upper bearing station of the feeding function part is connected with the conveyor belt at the discharge end of the low-temperature roasting machine; the lower bearing station of the feeding function part, the demolding function part and the parts The lower material distribution stations of the material function part are connected by the lower conveyor belt; the upper material distribution stations of the material distribution function part are connected to the upper conveyor belt.

[0101] The feeding function part includes a front inversion conveying device, which includes a front inversion driving device, a front inversion arm and a front inversion suction cup. The front inversion driving d...

Embodiment 3

[0111] like Figure 5-7 As shown, in this embodiment, the front flipping driving device and the rear flipping driving device each include a set of flipping functional bodies; the flipping functional body includes a vertically arranged fixed vertical plate, and a guide rail is fixed on the upper part of the fixed vertical plate The vertical plate, a "﹛"-shaped reversing guide slot is opened on the vertical plate of the guide rail.

[0112] The front flipping arm and the rear flipping arm each include a first connecting rod, a second connecting rod and a third connecting rod; a guide sliding block is inserted into the reversing guide groove, and the extending end of the guide sliding block is vertically connected to the first 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, and the o...

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Abstract

The invention relates to a preparation method for a microcrystalline alumina high-temperature rotary kiln inner lining, and belongs to the technical field of preparation of microcrystalline alumina and high-end aluminum refractory smelting materials. It is characterized by comprising the following steps: weighing raw materials, kneading, adding water and stirring, pouring and forming, and baking at low temperature to finalize the shape. The invention makes full use of corundum and mullite as main raw materials, and adds some additives as auxiliary raw materials to cast into prefabricated parts, and mainly solves the problem of high temperature resistance of refractory materials in the high-temperature alumina rotary kiln with harsh microcrystalline alumina calcination conditions and not being eroded and worn. , small volume change in hot and cold state, low service life of rotary kiln lining, etc., high-performance rotary kiln prefabricated lining is prepared. The rotary kiln prefab inner lining prepared by the invention has the characteristics of wear resistance, good corrosion resistance and small volume change under high temperature in the application in the new field of microcrystalline alumina calcination, and solves the problem of low life during use and frequent replacement of the inner lining. and other problems, correspondingly reduce labor intensity and improve production efficiency.

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 particularly relates to a preparation method of an inner lining for a high-temperature rotary kiln of microcrystalline alumina. Background technique [0002] At present, there are many alumina calcining, lime, and pelletizing rotary kilns in China, and aluminum-silicon fired bricks or prefabricated parts are generally used as linings. The corresponding supporting refractory materials of the kiln also have to catch up. Under the high temperature condition of alumina calcination, there are strict requirements for the high temperature performance and composition of the kiln lining reaction atmosphere refractory materials, so the configuration of the refractory materials should be designed accordingly. Under the high temperature airflow and the erosion of alumina, the working lining is more severely worn, a...

Claims

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Application Information

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Patent Type & Authority Patents(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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