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Process for producing superfine high-purity quartz glass pipe for high-temperature sensor

A quartz glass tube and high-temperature sensor technology, which is applied in glass forming, glass manufacturing equipment, radiation pyrometry, etc., can solve problems such as poor corrosion resistance, slow heat transfer speed, and poor heat uniformity, and achieve uniform heat Good performance, fast heat transfer and high strength

Active Publication Date: 2010-08-18
连云港市盛昌照明电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the traditional ceramic sheathing tube are: its heat transfer rate is slow, the heat uniformity is poor, it is easy to burst under sudden heat and sudden cooling conditions, and its resistance to molten steel and glass liquid erosion and corrosion resistance are relatively poor; therefore, the traditional The ceramic jacket protective tube can no longer meet the higher requirements of the existing high temperature sensor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1. A production process of ultra-fine high-purity quartz glass tubes for high-temperature sensors, the steps of which are as follows:

[0019] (1) The selected particle size is 20-30mm, SiO 2 Quartz blocks with a content of more than 99% are used as raw materials; the raw materials are put into hydrochloric acid with a concentration of 10% by mass and soaked for 40 hours, and then the hydrochloric acid is eluted with pure water until the conductivity of the eluted water is less than 60 us / cm; Quartz material;

[0020] (2) Put the pickling quartz material into the roasting furnace, and roast it at 850°C for 5 hours. After the roasting, immediately quench it with pure water, then mechanically pulverize it, and sieve it to obtain 40-140 mesh quartz powder; then use The high magnetic machine performs iron removal treatment on the quartz powder;

[0021] (3) drop the quartz powder after iron removal into the mixed acid that is 10% hydrochloric acid, 10% nitric aci...

Embodiment 2

[0025] Example 2. A production process of ultra-fine high-purity quartz glass tubes for high-temperature sensors, the steps of which are as follows:

[0026] (1) The selected particle size is 20-30mm, SiO 2 Quartz blocks with a content of more than 99% are used as raw materials; the raw materials are put into hydrochloric acid with a mass percentage concentration of 30% and soaked for 20 hours, and then the hydrochloric acid is eluted with pure water until the conductivity of the eluted water is less than 60us / cm; Quartz material;

[0027] (2) Put the acid-washed quartz material into the roasting furnace, and roast it at 900° C. for 3 hours. After the roasting, immediately quench it with pure water, then mechanically pulverize it, and sieve it to obtain 40-140 mesh quartz powder; The magnetic machine removes iron from the quartz powder;

[0028] (3) drop the quartz powder after iron removal into the mixed acid that is 30% hydrochloric acid, 30% nitric acid and 15% hydrofluo...

Embodiment 3

[0032] Example 3. A production process of ultra-fine high-purity quartz glass tubes for high-temperature sensors, the steps of which are as follows:

[0033] (1) The selected particle size is 20-30mm, SiO 2 Quartz blocks with a content of more than 99% are used as raw materials; the raw materials are put into hydrochloric acid with a mass percentage concentration of 20% and soaked for 24 hours, and then the hydrochloric acid is eluted with pure water until the conductivity of the eluted water is less than 60us / cm; Quartz material;

[0034] (2) Put the pickling quartz material into the roasting furnace, and roast it at 880°C for 4 hours. After the roasting, immediately quench it with pure water, then mechanically pulverize it, and sieve it to get 40-140 mesh quartz powder; The magnetic machine removes iron from the quartz powder;

[0035] (3) drop the quartz powder after iron removal into the mixed acid that is 20% hydrochloric acid, 20% nitric acid and 10% hydrofluoric acid...

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Abstract

The invention relates to a process for producing a superfine high-purity quartz glass pipe for a high-temperature sensor, which is characterized by comprising the following steps of: finely selecting quartz blocks as raw materials, wherein the particle size of the quartz blocks is 20-30 mm, and the content of SiO2 is above 99%; sequentially carrying out soaking in hydrochloric acid, roasting, water quenching, mechanical pulverization, iron removal, soaking in mixed acid, high-temperature stirring and washing and high-temperature chloridization on the raw materials to obtain high-purity quartz sand; then throwing the high-purity quartz sand in a quartz furnace for smelting, pulling into a quartz glass pipe, and then scouring, cutting, trimming, ultrasonic cleaning and dehydroxylating so that a finished product is obtained. The quartz glass pipe produced and prepared by the process has the superfine and ultrathin features, has the characteristics of high-temperature resistance, molten steel and glass liquid-washing resistance, corrosive resistance, high heat transfer speed, good soaking performance, large strength, long service life, no bursting under shock heating and cooling condition, strong process operability, scale production and the like, and completely accords with the requirements of various performance indexes of the quartz glass pipe used as an outer protective pipe of the high-temperature sensor.

Description

technical field [0001] The invention relates to a production process of a quartz glass tube, in particular to a production process of an ultrafine high-purity quartz glass tube for a high temperature sensor. Background technique [0002] In the prior art, the outer protective tube of the high temperature sensor is a ceramic outer protective tube made of ceramic material. The disadvantages of the traditional ceramic sheathing tube are: its heat transfer rate is slow, the heat uniformity is poor, it is easy to burst under sudden heat and sudden cooling conditions, and its resistance to molten steel and glass liquid erosion and corrosion resistance are relatively poor; therefore, the traditional The high-quality ceramic outer jacket can no longer meet the higher requirements of existing high-temperature sensors. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production process of an ultra-fine high-purity quartz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B20/00G01J5/02
Inventor 李玉生
Owner 连云港市盛昌照明电器有限公司
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