Method for preparing refractory brick in isostatic compaction mode

A technology of isostatic pressing and refractory bricks, applied in the field of refractory materials, can solve the problems of difficult operation and long cycle, and achieve the effect of shortening production cost, high yield and shortening production cycle

Active Publication Date: 2016-05-18
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for preparing refractory bricks by means of isostatic pressing, so that it can solve the shortcomings of the mud drying process in the existing isostatic pressing technology, such as difficult operation and long cycle, by improving the mud preparation process , and has the advantages of simple operation and high yield. The refractory bricks prepared have the characteristics of large size, uniform structure, excellent thermal shock resistance and good corrosion resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A kind of preparation method that adopts isostatic pressing molding method to prepare refractory brick, described preparation method includes the composition of raw material, the preparation of mud material and the molding of refractory brick; Its specific steps are as follows:

[0018] 1) Composition of raw materials: The raw material composition and mass percentage of refractory bricks are 45% of granular materials with a particle size of 0.1~3mm; 55% of matrix fine powder with a particle size of <0.044mm; the raw materials are also added with a binder; The binding agent includes a solid binding agent and water; the fixed binding agent is solid aluminum dihydrogen phosphate, the addition of solid aluminum dihydrogen phosphate is 0.9% of the raw material weight, and the addition of water is 1.2% of the raw material weight;

[0019] 2) Preparation of mud: Stir the granular material and solid binder described in step 1) in a mill to make the solid binder eve...

Embodiment 2

[0023] A method for preparing refractory bricks by means of isostatic pressing, the preparation method includes the composition of raw materials, the preparation of mud and the molding of refractory bricks; the specific steps are as follows:

[0024] 1) Composition of raw materials: The raw material composition and mass percentage of refractory bricks are 25% of corundum particles with a particle size of 0.1~3mm; 25% of mullite particles with a particle size of 0.1~3mm; 44% of alumina powder with a particle size of <0.044mm; 6% clay fine powder with particle size <0.044mm; the raw material is also added with a binder; the binder includes a solid binder and water; the fixed binder is solid aluminum dihydrogen phosphate, solid aluminum dihydrogen phosphate The addition of water is 0.8% of raw material weight, and the addition of water is 1.0% of raw material weight;

[0025] 2) Preparation of mud: Stir the granular material and solid binder described in step 1) in a mill to make...

Embodiment 3

[0029] A method for preparing refractory bricks by means of isostatic pressing, the preparation method includes the composition of raw materials, the preparation of mud and the molding of refractory bricks; the specific steps are as follows:

[0030] 1) Composition of raw materials: The raw material composition and mass percentage of refractory bricks are: 60% of corundum sand with a particle size of 0.1~3mm; 11% of chromium oxide powder with a particle size of <0.044mm; 25% of alumina powder with a particle size of <0.044mm; <0.005mm zirconia powder 4%; the raw material is also added with a binder; the binder includes a solid binder and water; the fixed binder is solid aluminum dihydrogen phosphate, solid aluminum dihydrogen phosphate The addition amount is 0.8% of raw material weight, and the addition amount of water is 0.6% of raw material weight;

[0031] 2) Preparation of mud: Stir the granular material and solid binder described in step 1) in a mill to make the solid bin...

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Abstract

The invention belongs to the field of refractory materials, and provides a method for preparing a refractory brick in an isostatic compaction mode. The method provided by the invention comprises the steps of composition of raw materials, preparation of sludge and formation of the refractory brick. The refractory brick is prepared from the following raw materials in percentage by mass: 45-65% of particle material with the particle size of 0.1-3mm, and 35-55% of matrix fine powder with the particle size of less than 0.044mm. The refractory brick is also additionally prepared from a binder, wherein the binder comprises a solid binder and water. The method comprises the following steps: stirring the particle material and solid binder in a runner wheel machine so that the solid binder is uniformly distributed in the particle material, adding the water, milling together, finally adding the matrix fine powder, and milling to obtain the sludge; and directly adding the sludge into a mold, and forming. The method shortens the sludge preparation period and production cost, is simple to operate, and has the characteristic of high yield.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a method for preparing refractory bricks by means of isostatic pressing. Background technique [0002] Compared with the traditional molding method, the product obtained by the isostatic pressing molding technology has a uniform structure, no defects such as large pores or bubbles inside, and can take into account both corrosion resistance and thermal shock resistance; at the same time, this technology can prepare large-sized products to meet Special use parts have requirements for large size of refractory bricks and reduction of masonry brick joints. [0003] The key to the isostatic pressing technology lies in the preparation of the mud. On the one hand, the moisture content of the mud is required to be uniform and kept in a low range to ensure that the mud has good fluidity and molding yield; The material has a high bonding strength to ensure that the molding b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3241C04B2235/3244C04B2235/3463C04B2235/349C04B2235/447C04B2235/602
Inventor 冯志源王晗谭清华石鹏坤李坚强张永治方旭范沐旭
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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