Method for preparing corundum mullite crucible

A mullite and crucible technology, applied in the field of corundum mullite crucibles, can solve the problems of poor thermal stability and acid and alkali resistance, high cost of crucibles, easy cracking and peeling, etc., to improve yield and thermal stability, improve Yield and erosion resistance, effect of improving sintering yield

Active Publication Date: 2013-04-10
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problems of high cost, low efficiency, poor thermal stability, acid and alkali resistance, easy cracking and peeling, and short lifespan of crucibles for melting and cloth glaze in the ceramic industr...

Method used

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  • Method for preparing corundum mullite crucible

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: The mass percent of each component is: 29% of sintered mullite particles with a particle size of 2 to 0.1mm, 14% of fused mullite fine powder with a particle size of 0.061mm to 0.075mm, and 14% of fused mullite fine powder with a particle size of ≤0.045mm 6% clay, 35% alumina micropowder with particle size ≤ 3μm, 2.1% pure calcium aluminate cement, 6.48% aluminum dihydrogen phosphate, 0.08% naphthalene-based superplasticizer (FDN-300), 0.08% magnesia micropowder, water 7.26%.

[0036] The preparation method of corundum mullite crucible specifically comprises the following steps:

[0037] (1) First mix the micropowder, dispersant and coagulant in a ball mill tank for about 40 minutes in a certain proportion, so that the micropowder, dispersant and coagulant are fully dispersed and mixed evenly, and then put the mixed matrix powder into the belt Sealed in a woven bag of plastic film;

[0038] (2) Put the mullite particles, premixed fine powder and mullite fin...

Embodiment 2

[0042] Example 2: The mass percent of each component is: 31% of sintered mullite particles with a particle size of 2 to 0.1mm, 13% of fused mullite fine powder with a particle size of 0.061mm to 0.075mm, and 13% of fused mullite fine powder with a particle size of ≤0.045mm Sintered mullite micropowder 10%, alumina micropowder ≤3μm 27%, pure calcium aluminate cement 2.48%, aluminum dihydrogen phosphate 7.42%, magnesia micropowder 0.72%, sodium tripolyphosphate 0.11%, water 8.27%. The preparation method is the same as in Example 1.

Embodiment 3

[0043]Example 3: The mass percentage of each component is: 32% of fused mullite particles with a particle size of 2 to 0.1mm, 9% of fused mullite fine powder with a particle size of 0.061mm to 0.075mm, and a particle size of ≤0.045mm 5% of fused mullite powder, 33% of alumina powder with particle size ≤ 3μm, 4.8% of pure calcium aluminate cement, 10.74% of aluminum dihydrogen phosphate, 0.87% of magnesium oxide powder, 0.16% of sodium tripolyphosphate, and 4.43% of water %. The preparation method is the same as in Example 1.

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Abstract

The invention relates to a crucible applied to the fields of ceramic industry, metal smelting, powder high-temperature calcination and the like, in particular to a method for preparing a corundum mullite crucible. The corundum mullite crucible takes mullite particles with the particle size being 2-0.1mm and fine mullite powder with the particle size being 0.061-0.075mm as aggregates, and a matrix part comprises sintered alumina micro powder with the particle size being 0.003mm at most and also comprises mullite micro powder with the particle size being 0.045mm at most or adds clay with the particle size being 0.045mm at most at the same time. A binder is a phosphate binder or adds an aluminate binder, magnesium oxide micro powder with the particle size being at most 0.045mm is adopted as a coagulant, and a water reducer adopts a high-efficiency water reducer or sodium tripolyphosphate. According to the method, the deformation and the yield of the casting crucible products sintering processing are improved and increased, and the purposes of cost reducing, efficiency increasing, energy saving and consumption reducing are achieved.

Description

technical field [0001] The invention relates to a crucible used in the fields of ceramic industry, metal smelting and powder high-temperature calcination, especially relates to a crucible that can be used for a long time under extremely cold, extremely hot and harsh environmental conditions, and has high volume density and low porosity. , Corundum mullite crucible with good erosion resistance and erosion resistance. Background technique [0002] The ceramic industry needs to use a crucible-shaped funnel with complex structure and high integrity requirements in the process of melting and laying glaze. The crucible is characterized by acid and alkali resistance, corrosion resistance, erosion resistance, thin wall and good volume stability. and thermal stability. [0003] The molten glaze cloth glaze crucible currently used in the ceramic industry generally adopts isostatically pressed quartz crucible or clay crucible, etc. The crucible formed in this way has high density and ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/185C04B35/622
Inventor 张永治耿可明吴爱军朱德先王晗胡瓢石鹏坤尹洪基谭清华李坚强马旭峰
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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