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Preparation process of fused quartz with high fire resistance

A technology for fused silica and a preparation process, which is applied in the field of preparation technology of high refractory fused silica, can solve problems such as the problem of unsolved fused silica crystallization of fused silica, avoid chemical stability, have wide application prospects, and reduce sintering. shrinking effect

Active Publication Date: 2021-01-22
徐州赛诺石英有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese patent application number is CN201911135362.0, which discloses a fused silica refractory material for precision casting shells and its preparation process. It is made of the following raw materials in parts by mass: fused silica powder 70-80 parts, calcium oxide 8-10 parts 6-8 parts of magnesium oxide, 2-3 parts of manganese oxide, 3-4 parts of titanium oxide, 1-2 parts of niobium pentoxide, 1-1.5 parts of tantalum pentoxide, 4-6 parts of binder, no Solve the problem that fused silica will cause crystallization of fused silica when it is used under high temperature for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of high-purity fused silica: the vein quartz raw ore is first graded and washed to remove clay, and then crushed to a particle size range of 4-25mm, and the crushed quartz particles are acid-treated to obtain high-purity quartz raw materials; for high-purity quartz The raw materials are melted to obtain fused silica bulk materials; the fused silica bulk materials are manually crushed and sorted to remove obvious impurities, and then crushed by a centrifugal crusher to the required particle size range of 1-10 mm; the crushed fused silica Quartz powder is processed by magnetic separation to obtain high-purity fused silica powder;

[0046] (2) Ingredients: the high refractory fused silica mainly includes the following components in parts by mass: 50 parts of high-purity fused silica powder, 45 parts of binder, 22 parts of cordierite, and 13 parts of sillimanite; The particle gradation ratio of the high-purity fused silica powder is 20-30 mesh: 30-60 mesh: 6...

Embodiment 2

[0064] (1) Preparation of high-purity fused silica: the vein quartz raw ore is first graded and washed to remove clay, and then crushed to a particle size range of 4-25mm, and the crushed quartz particles are acid-treated to obtain high-purity quartz raw materials; for high-purity quartz The raw materials are melted to obtain fused silica bulk materials; the fused silica bulk materials are manually crushed and sorted to remove obvious impurities, and then crushed by a centrifugal crusher to the required particle size range of 1-10 mm; the crushed fused silica Quartz powder is processed by magnetic separation to obtain high-purity fused silica powder;

[0065] (2) Ingredients: The high refractory fused silica mainly includes the following components in parts by mass: 55 parts of high-purity fused silica powder, 40 parts of binder, 20 parts of cordierite, and 10 parts of sillimanite; The particle gradation ratio of the high-purity fused silica powder is 20-30 mesh: 30-60 mesh: 6...

Embodiment 3

[0083] (1) Preparation of high-purity fused silica: the vein quartz raw ore is first graded and washed to remove clay, and then crushed to a particle size range of 4-25mm, and the crushed quartz particles are acid-treated to obtain high-purity quartz raw materials; for high-purity quartz The raw materials are melted to obtain fused silica bulk materials; the fused silica bulk materials are manually crushed and sorted to remove obvious impurities, and then crushed by a centrifugal crusher to the required particle size range of 1-10 mm; the crushed fused silica Quartz powder is processed by magnetic separation to obtain high-purity fused silica powder;

[0084] (2) Ingredients: The high refractory fused silica mainly includes the following components in parts by mass: 53 parts of high-purity fused silica powder, 40 parts of binder, 25 parts of cordierite, and 15 parts of sillimanite; The particle gradation ratio of the high-purity fused silica powder is 20-30 mesh: 30-60 mesh: 6...

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Abstract

The invention discloses a preparation process of high-fire-resistance fused quartz. The preparation process comprises the following steps: (1) preparing high-purity fused quartz; (2) burdening: on thebasis that the fused quartz with high fire resistance mainly comprises the following components in parts by mass: 50-60 parts of high-purity fused quartz powder, 40-50 parts of a binding agent, 20-30parts of cordierite and 10-15 parts of sillimanite, preparing the raw materials according to the mass parts of the components in the formula; (3) pretreatment: carrying out crushing, sieving and grading operations on the high-purity fused quartz powder, and respectively carrying out wet ball milling, granulation, sieving, granulation and aging on the binding agent, cordierite and sillimanite; (4)mixing the raw materials; (5) forming the semiproduct; (6) drying the semiproduct; and (7) firing the semiproduct. According to the preparation process of the high-fire-resistance fused quartz, the preparation process is simple and efficient, the formula design is reasonable, and the prepared fused quartz has high fire resistance, excellent thermal shock resistance, good chemical stability, smallexpansion coefficient, low thermal conductivity and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of fused silica preparation, and in particular relates to a preparation process of high refractory fused silica. Background technique [0002] Quartz is a non-metallic mineral mainly composed of silicon dioxide, widely distributed in nature. As an important industrial raw material, quartz is mainly used in traditional industries such as glass, ceramics, refractory materials, mechanical casting, metallurgy and chemical industry. With the advancement of science and technology and the development of the national economy, quartz raw materials are also widely used in high-tech industries, such as aerospace, aviation, navigation, military, electrical engineering, electronics, telecommunications, and automobiles. [0003] Refractories are defined as inorganic non-metallic materials with a refractoriness not lower than 1580°C, where the refractoriness refers to the highest temperature at which the cone shape of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/66C04B35/622
CPCC04B35/14C04B35/66C04B35/622C04B2235/3481C04B2235/3463C04B2235/96C04B2235/9607
Inventor 季明光
Owner 徐州赛诺石英有限公司
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