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Industrial manufacture method of single crystal phase mullite

An industrial manufacturing and mullite technology, which is applied in the industrial manufacturing field of single crystal phase mullite, can solve the problems of high content of harmful impurities, poor product performance and high production cost, and achieves simple production process, low production cost, and improved production efficiency. The effect of refractoriness

Inactive Publication Date: 2008-01-09
马全才
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defects of high production cost, poor product performance and high content of harmful impurities such as iron and carbon in the existing mullite production method, the present invention provides an industrial production method of single crystal phase mullite

Method used

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  • Industrial manufacture method of single crystal phase mullite

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Embodiment 1

[0025] The industrial production method of single crystal phase mullite, comprising the following steps: a, crushing hard kaolin to 325 mesh; b, adding 0.02% mineralizer and 8% potassium feldspar of the weight of hard kaolin, mixing uniformly , the mineralizer is formed by mixing 10% potassium nitrate, 70% potassium carbonate and 20% potassium chlorate; c, dry molding; d, calcining at a high temperature of 1450° C. for 16 hours. The chemical composition and phase composition of the obtained single crystal phase mullite are shown in the following table:

[0026] chemical composition

Embodiment 2

[0028] The industrial manufacturing method of single crystal phase mullite comprises the following steps: a, crushing hard kaolin to 400 mesh; b, adding 0.03% mineralizer and 10% potassium feldspar by weight of hard kaolin, mixing uniformly, The mineralizer is formed by mixing 40% potassium nitrate, 50% potassium carbonate and 10% potassium chlorate; c, wet molding; d, calcining at a high temperature of 1550° C. for 16 hours. The chemical composition and phase composition of the obtained single crystal phase mullite are shown in the following table:

[0029] chemical composition

Embodiment 3

[0031] The industrial manufacturing method of single crystal phase mullite comprises the following steps: a, breaking hard kaolin to 350 mesh; b, adding 0.01% mineralizer and 9% potassium feldspar by weight of hard kaolin, mixing uniformly, The mineralizer is formed by mixing 30% potassium nitrate, 60% potassium carbonate and 10% potassium chlorate; c, dry forming; d, calcining at a high temperature of 1500° C. for 16 hours. The chemical composition and phase composition of the obtained single crystal phase mullite are shown in the following table:

[0032] chemical composition

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Abstract

This invention relates to a preparation method for mullites, i.e. an industrial manufacture method for single crystal mullites, which solves the problems in existing technology, like high production cost, poor performance and high harmful impurities of iron and carbon. The method comprises pulverizing hard kaoline to 325-400 meshes, adding 0.02%-0.03% mineralizer and 8-10% potash feldspar and mixing, wherein the mineralizer is the mixture of 10-40% potassium nitrate and 50-70% potassium carbonate and 10-20% potassium chlorate, molding, and calcining at 1450-1550DEG C for 16 h. This invention has the advantages of low cost, simple manufacturing process, high content of mullite, low impurities content such as iron, and no quartz. The casting manufactured has high precision and smoothness, and can be widely used in the defense industry, aerospace and aviation industry and metallurgical industry and can increase fireproof material refractoriness.

Description

technical field [0001] The invention relates to a preparation method of mullite, in particular to an industrial production method of single crystal phase mullite. Background technique [0002] In coal production, most coal-measure kaolinites cannot be used due to complex process conditions and are discarded, which not only wastes resources but also pollutes the environment. At present, some enterprises crush the coal-series kaolinite, that is, coal gangue, and calcinate it above 1250°C to form new phases, namely mullite phase, cristobalite phase and glass phase, which are used in precision casting and as refractory materials, among which Mo The content of mullite directly affects the use effect of the new phase. The higher the mullite content, the higher the precision of the precision casting and the better the finish. It can be widely used in defense industry, aerospace, aviation industry and metallurgy and other industries. Improve the refractoriness of refractory materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/185
Inventor 马全才
Owner 马全才
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