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Method for producing low-hydroxyl-group quartz glass tube

A technology for quartz glass tubes and production methods, which is applied in glass forming, glass forming, vertical drawing of molten glass, etc., can solve problems such as low production efficiency, high hydroxyl content, poor controllability of production process, etc., and achieve production High efficiency, good product quality and easy operation

Inactive Publication Date: 2006-10-25
单军成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The quartz glass tubes produced by the production method of quartz glass tubes in the prior art are all colorless quartz glass tubes. The controllability of the production process is poor, and the hydroxyl content is high, which cannot meet the needs of some special industries. For intermittent production, the production efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1. A method for producing low hydroxyl quartz glass tube, the steps are as follows:

[0021] (1) Raw material processing, select SiO-containing 2 =99.90%, impurity content is 30ppm, 60 mesh high-purity quartz powder, mixed with 0.1% coloring agent copper nitrate with a weight of high-purity quartz powder, mixed evenly, and dried;

[0022] (2) Add the above-mentioned treated raw materials into a continuous fused quartz furnace for melting, open the vent hole at the furnace mouth to discharge gas impurities, and the melted raw materials are drawn into a dark red quartz glass tube by a tractor blanking and drawing tube;

[0023] (3) Put the dark red quartz glass tube into the dehydration furnace for dehydroxylation treatment to obtain a magenta red quartz glass tube.

Embodiment 2

[0024] Example 2. A method for producing low hydroxyl quartz glass tube, the steps are as follows:

[0025] (1) Raw material processing, select SiO-containing 2 = 99.99%, impurity content is 20ppm, 220 mesh high-purity quartz powder, mixed with 1.0% coloring agent magnesium oxide with a weight of high-purity quartz powder, mixed evenly, and dried;

[0026] (2) Add the above-mentioned treated raw materials into a continuous fused quartz furnace for melting, open the vent hole at the furnace mouth to discharge gas impurities, and the melted raw materials are drawn into a dark red quartz glass tube by a tractor blanking and drawing tube;

[0027] (3) Put the dark red quartz glass tube into the dehydration furnace for dehydroxylation treatment to obtain a magenta red quartz glass tube.

Embodiment 3

[0028] Example 3. A kind of production method of low hydroxyl quartz glass tube, its step is as follows,

[0029] (1) Raw material processing, select SiO-containing 2 =99.98%, impurity content less than 20ppm, 180 mesh high-purity quartz powder, mixed with 0.4% coloring agent by weight of high-purity quartz powder, the coloring agent is cerium oxide, after mixing evenly, add quartz continuously and dry The furnace is continuously dried, and the temperature in the drying furnace is 500°C;

[0030] (2) Add the above-mentioned treated raw materials into the continuous melting quartz furnace for melting, open the vent hole at the furnace mouth to discharge gas impurities, and sink the continuously melted raw materials into the bottom of the furnace. Red quartz glass tube; during continuous melting, the temperature in the fused quartz furnace is kept at 1800°C.

[0031] (3) Put the dark red quartz glass tube into a dehydroxylation furnace to obtain a magenta quartz glass tube af...

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Abstract

The invention is a method for producing a low-hydroxyl quartz glass tube, characterized in that it selects 60-220 mesh high-purity quartz powder containing SiO2 >=99.90%, and impurities less than 30ppm, and dopes colorizing agent in 0.1-1.0% of the weight of the high-purity quartz powder, where the colorizing agent selects at least one of the copper nitrate, magnesia and cerium oxide, mixed uniformly and dried; it adds the processed raw materials into a continuous melting quartz furnace and melts them, opens the gas outlet at the furnace mouth and discharges gas impurities, feeding the melted raw materials into a drawer for making tube drawing forming and draws them into wine quartz glass tubes; feeds the wine quartz glass tubes into a de-hydroxylation furnace for de- hydroxylation and obtaining the finished products-red quartz glass tubes. The hydroxyl content of the red quartz glass tubes is generally lower than 1ppm and the products have good quality, and can be applied to special industries; and the process of the invention can implement continuous quartz glass tube production, having high productivity.

Description

technical field [0001] The invention relates to a production method of a quartz glass tube, in particular to a production method of a low-hydroxyl quartz glass tube. Background technique [0002] The quartz glass tubes produced by the production method of quartz glass tubes in the prior art are all colorless quartz glass tubes. The controllability of the production process is poor, and the hydroxyl content is high, which cannot meet the needs of some special industries. For intermittent production, the production efficiency is low. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production method of a low-hydroxyl quartz glass tube with a simple production process in view of the deficiencies of the prior art, by which a red quartz glass tube with low hydroxyl content and good quality can be produced . [0004] The technical problem to be solved by the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/06C03B15/14C03B20/00C03C1/04C03C4/02
CPCC03B17/04C03B32/00C03B2201/075C03C3/06
Inventor 单军成
Owner 单军成
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