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Preparation method of multi-phase alumina ceramic hanging board for cement kiln

A phase alumina and cement kiln technology, which is applied in the field of preparation of large-scale multiphase alumina ceramic hanging boards, can solve the problems of poor high-temperature creep, inability to be directly applied, and high thermal expansion coefficient, so as to improve high-temperature creep performance and prepare The method is scientific and reasonable, and the performance is good

Active Publication Date: 2012-02-15
ZHONGCAI HIGH NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corundum is a high-grade refractory material and a high-grade ceramic material. It has very high strength and good thermal shock resistance, but it has a high thermal expansion coefficient and poor high-temperature creep, and it is easy to creep under high temperature and long-term tensile stress. variable fracture
Cannot be applied directly, needs to be adjusted

Method used

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  • Preparation method of multi-phase alumina ceramic hanging board for cement kiln

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Experimental program
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Effect test

Embodiment 1

[0032] The preparation method of cement kiln composite-phase alumina ceramic hanging board of the present invention is as follows:

[0033] Calcined α-Al by weight ratio 2 o 3 Micropowder, corundum sand, Suzhou soil and Datong soil are 30%, 35%, 20% and 15% respectively, binder polyvinyl alcohol 5‰, water reducer sodium tripolyphosphate 5‰, tap water as solvent, ball milling, The medium particle size of the slurry reaches 2.5-3.5um, stop grinding when the D90 is below 5um, the slurry passes through a 300-mesh sieve, and the slurry is granulated by a centrifugal drying tower after iron removal, and the particle size range of the powder is controlled at 0.5-2.5mm . Then the powder is put into the mold of the press, and the maximum pressure of the press is 1100MPa. The formed body is put into a shuttle kiln or a tunnel kiln and fired at a maximum firing temperature of 1400°C for 2 hours. After the product is naturally cooled, post-processing is carried out according to the in...

Embodiment 2

[0036] The preparation method of cement kiln composite-phase alumina ceramic hanging board of the present invention is as follows:

[0037] Calcined α-Al by weight ratio 2 o 3 Micropowder, corundum sand, Suzhou soil and Datong soil are 30%, 35%, 20% and 15% respectively, binder polyvinyl alcohol 5‰, water reducer sodium tripolyphosphate 5‰, tap water as solvent, ball milling, The medium particle size of the slurry reaches 2.5-3.5um, stop grinding when the D90 is below 5um, pass the slurry through a 300-mesh sieve, press filter the slurry to make mud after removing iron, and put the mud into a vacuum extruder after fully refining the mud Inside, extrusion molding; after the formed green body is completely dried, it is put into a shuttle kiln for hanging firing, the highest firing temperature is 1450°C, and it is kept for 2 hours. After the product is naturally cooled, post-processing is carried out according to the installation requirements of the cement manufacturer's hangin...

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Abstract

The invention relates to a preparation method of multi-phase alumina ceramic hanging boards for cement kilns, which belongs to the technical field of functional ceramics, including batching, molding and firing, and is characterized in that the weight percentage of the batching is composed of: calcined α-Al2O3 micropowder 25- 35%, corundum sand 30-40%, Suzhou soil 15-25%, Datong soil 10-20%, binder 3-6‰ and water reducing agent 3-6‰, the prepared ceramic hanging board has a long service life and low cost of use Low, can guarantee cement output, reduce cement production cost.

Description

technical field [0001] The invention relates to a preparation method of a large-size multi-phase alumina ceramic hanging plate used for an inner cylinder of a preheater of a cement kiln, and belongs to the technical field of functional ceramics. Background technique [0002] At present, the inner tube material of the cement kiln preheater is generally made of heat-resistant and wear-resistant special alloy steel plate. Due to the conditions, this steel plate must undergo the corrosion and wear of the high-temperature action medium in the cement production process, especially in the new dry process production line. The C4 and C5 hanging plate inner cylinders of the kiln tail preheater system, under the long-term corrosion of the medium at 900-1050°C (corrosive substances such as sulfides, nitrides and chlorides) and the erosion of dusty high-speed airflow, the steel The high-quality steel plate is severely corroded and worn, and its service life is generally 8-10 months, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/10
Inventor 李勇陈学江张大军吕宝伟黄继全彭建新施连章
Owner ZHONGCAI HIGH NEW MATERIAL