CN101805116B - Process for producing superfine high-purity quartz glass pipe for high-temperature sensor - Google Patents
Process for producing superfine high-purity quartz glass pipe for high-temperature sensor Download PDFInfo
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- CN101805116B CN101805116B CN201010141153XA CN201010141153A CN101805116B CN 101805116 B CN101805116 B CN 101805116B CN 201010141153X A CN201010141153X A CN 201010141153XA CN 201010141153 A CN201010141153 A CN 201010141153A CN 101805116 B CN101805116 B CN 101805116B
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- hydrochloric acid
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000005406 washing Methods 0.000 claims abstract description 22
- 238000002791 soaking Methods 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 18
- 239000010453 quartz Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 13
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 25
- 239000011259 mixed solution Substances 0.000 claims description 20
- 238000005554 pickling Methods 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 20
- 238000005660 chlorination reaction Methods 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 13
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 12
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 12
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 12
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000005642 Oleic acid Substances 0.000 claims description 12
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 12
- 239000003350 kerosene Substances 0.000 claims description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims description 12
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 230000001476 alcoholic effect Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- 229950005499 carbon tetrachloride Drugs 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- 239000000460 chlorine Substances 0.000 claims description 5
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 5
- 238000010791 quenching Methods 0.000 abstract description 4
- 230000000171 quenching effect Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 239000006004 Quartz sand Substances 0.000 abstract 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 230000009172 bursting Effects 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- -1 roasting Substances 0.000 abstract 1
- 238000009991 scouring Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 238000009966 trimming Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004454 trace mineral analysis Methods 0.000 description 1
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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
The present invention relates to the production technique of a kind of production technique of quartz glass tube, particularly a kind of superfine high-purity quartz glass pipe for high-temperature sensor.
Background technology
In the prior art, the overcoat pillar of pyrostat is the ceramic coat pillar made from stupalith.The defective of traditional ceramic coat pillar is: its heat transfer rate is slower, the soaking poor-performing, and explosion easily under shock heating quenching conditions, anti-molten steel washes away with glass metal, corrosion resistance is relative relatively poor; Therefore, traditional ceramic coat pillar can not satisfy the requirements at the higher level that have pyrostat now.
Summary of the invention
Technical problem to be solved by this invention is at the deficiencies in the prior art, provide a kind of technology reasonable, workable, effectively improve the production technique of the superfine high-purity quartz glass pipe for high-temperature sensor of final product quality.
Technical problem to be solved by this invention is to realize by following technical scheme.The present invention is a kind of production technique of superfine high-purity quartz glass pipe for high-temperature sensor, is characterized in, its step is as follows:
(1) optimum break is 20-30mm, SiO
2Content is that the quartz wedge more than 99% is a raw material; With raw material drop in the hydrochloric acid that mass percent concentration is 10-30% soak 20-40 hour after, with pure water wash-out hydrochloric acid, until the electric conductivity of wash-out water less than 60us/cm; Get the quartzy material of pickling;
(2) the quartzy material of pickling is dropped in the stoving oven, at 850 ℃ of-900 ℃ of following roasting 3-5 hours, roasting was carried out shrend with pure water after finishing immediately, carries out mechanical disintegration again, sieve 40-140 order silica powder; With high magnetic machine silica powder being carried out deironing then handles;
(3) be to soak 4-6 days in the mixing acid formed of the hydrofluoric acid of the nitric acid of hydrochloric acid, 10-30% of 10-30% and 5-15% by mass percent concentration with the silica powder input after the deironing, the weight ratio of hydrochloric acid, nitric acid, hydrofluoric acid is 1-2: 1-2: 1-2; Soaking the back will soak slurry to be concentrated into concentration be 30-45% under 40-45 ℃; Must soak slurry;
(4) will soak slurry drops in the ultrasonoscope, adding the mixed solution of being made up of kerosene, oleic acid and ethanol again carries out high temperature and mixes and wash under 300-500 ℃ of condition, the weight of mixed solution is for soaking the 15-30% of slurry weight, mix when washing and regulate the pH value to 7.3-7.5 with ammoniacal liquor, kerosene, oleic acid, alcoholic acid weight ratio are 1-2: 1-2: 1-2 in the mixed solution; Must mix the pulp washing material;
(5) will mix the pulp washing material and drop in the chlorination reaction still, and carry out high-temp chlorination and handle mixing the pulp washing material under 500-1400 ℃ of condition, be that the hydrochloric acid of 10-30% carried out high-temperature chlorination 0.5-2.0 hour by chlorine, tetrachloromethane and mass percent concentration during processing; Dry after the reaction, deironing handles, the magneticstrength of high magnetic machine is 1800-2200KA/m during deironing; Get the glass sand of total impurities content less than 30ppm;
(6) after glass sand drops into and carries out melting in the quartz continuous melting furnace, be drawn into the quartz glass tube that diameter is 1.3-1.5; Get quartz glass tube then, using by mass percent concentration is that the mixed solution that the hydrofluoric acid of the hydrochloric acid of 10-30% and 5-15% is formed carries out pickling, and the weight ratio of hydrochloric acid, hydrofluoric acid is 2-3: 1; After the pickling quartz glass tube is cut, burns mouth, ultrasonic cleaning and deshydroxy and handle, get finished product.
In the production technology scheme of above-described superfine high-purity quartz glass pipe for high-temperature sensor:
1, in step (1), the time of soaking in the raw material input hydrochloric acid is preferably 24 hours.
2, in the mixing acid of step (3), the weight ratio of hydrochloric acid, nitric acid, hydrofluoric acid is preferably 1: 1: 1.
3, in step (4), kerosene, oleic acid, alcoholic acid weight ratio are preferably 1: 1: 1.
4, in step (6), the vacuum tightness when deshydroxy is really handled preferably is not less than 1 * 10
-4, temperature preferably is not less than 1500 ℃, soaking time and is preferably greater than 12 hours.
The metallogenic theory of technological basis quartz of the present invention, comprehensive physics removal of impurities (be generally and adopt artificial naked eyes fine purifiation raw material), chemical purification, high temperature is removed comprehensive purification methods such as gaseous impurities, produces the high-purity ground quartz that meets the product innovation demand.Adopt normal temperature salt acid soak, remove partial impurities; Adopt high-temperature roasting, Water Quenching, carry out high-temperature roasting by the high-temperature roasting stove, under the condition of high temperature, corollary failure quartz raw material intrinsic contaminants structure, make it progressively discharge impurity under the condition of high temperature, quartz raw material is shrend at high temperature, destroys quartzy crystalline structure, make it be easy to fragmentation, the data that instant trace analysis and test quartz raw material reduce through the high-temperature roasting rear impurity.Employing mixing acid soaks, and the multinomial impurity after chemical reaction in the silica powder is progressively reduced.Adopt ultrasonic wave multiple elements chemical medicament high temperature to mix and wash technology, further reduced impurity.Carry out high-temp chlorination and handle, make the impurity that is difficult in acid soak, get rid of, discharge by chloridized.Each treatment step of technology of the present invention complements each other, and interlocks step by step, removes the various impurity in the raw material effectively.
Compared with prior art; the quartz glass tube of explained hereafter of the present invention preparation has ultra-fine, ultra-thinly to be waited to levy; have that high temperature resistant, anti-molten steel and glass metal wash away, corrosion-resistant, heat transfer rate is fast, the soaking performance is good, intensity is big, long service life, technical characterstic such as not explosion under shock heating quenching conditions; technology is workable; but the big production of mass-producing meets the various performance index requirements as pyrostat overcoat pillar fully.
Embodiment
Below further describe concrete technical scheme of the present invention,, and do not constitute restriction its right so that those skilled in the art understands the present invention further.
Embodiment 1.A kind of production technique of superfine high-purity quartz glass pipe for high-temperature sensor, its step is as follows:
(1) optimum break is 20-30mm, SiO
2Content is that the quartz wedge more than 99% is a raw material; With raw material drop into mass percent concentration be soak 40 hours in 10% the hydrochloric acid after, with pure water wash-out hydrochloric acid, until the electric conductivity of wash-out water less than 60us/c m; Get the quartzy material of pickling;
(2) the quartzy material of pickling is dropped in the stoving oven, 850 ℃ of ℃ of following roastings 5 hours, roasting was carried out shrend with pure water after finishing immediately, carries out mechanical disintegration again, sieve 40-140 order silica powder; With high magnetic machine silica powder being carried out deironing then handles;
(3) be to soak 6 days in the mixing acid formed of the hydrofluoric acid of 10% hydrochloric acid, 10% nitric acid and 5% the silica powder input after the deironing by mass percent concentration, the weight ratio of hydrochloric acid, nitric acid, hydrofluoric acid is 1: 2: 1; Soaking the back will soak slurry to be concentrated into concentration be 30% under 40 ℃; Must soak slurry;
(4) will soak slurry drops in the ultrasonoscope, adding the mixed solution of being made up of kerosene, oleic acid and ethanol again carries out high temperature and mixes and wash under 300 ℃ of conditions, the weight of mixed solution is for soaking 15% of slurry weight, mix when washing and regulate pH value to 7.3 with ammoniacal liquor, kerosene, oleic acid, alcoholic acid weight ratio are 1: 2: 1 in the mixed solution; Must mix the pulp washing material;
(5) will mix the pulp washing material and drop in the chlorination reaction still, and carry out high-temp chlorination and handle mixing the pulp washing material under 500 ℃ of conditions, be that 10% hydrochloric acid carried out high-temperature chlorination 2.0 hours by chlorine, tetrachloromethane and mass percent concentration during processing; Dry after the reaction, deironing handles, the magneticstrength of high magnetic machine is 1800KA/m during deironing; Get the glass sand of total impurities content less than 30ppm;
(6) after glass sand drops into and to carry out melting in the quartz continuous melting furnace, be drawn into diameter and be 1.3 quartz glass tube; Get quartz glass tube then, using by mass percent concentration is that the mixed solution that the hydrofluoric acid of 10% hydrochloric acid and 5% is formed carries out pickling, and the weight ratio of hydrochloric acid, hydrofluoric acid is 2: 1; After the pickling quartz glass tube is cut, burns mouth, ultrasonic cleaning and deshydroxy and handle, get finished product.
Embodiment 2.A kind of production technique of superfine high-purity quartz glass pipe for high-temperature sensor, its step is as follows:
(1) optimum break is 20-30mm, SiO
2Content is that the quartz wedge more than 99% is a raw material; With raw material drop into mass percent concentration be soak 20 hours in 30% the hydrochloric acid after, with pure water wash-out hydrochloric acid, until the electric conductivity of wash-out water less than 60us/cm; Get the quartzy material of pickling;
(2) the quartzy material of pickling is dropped in the stoving oven, 900 ℃ of following roastings 3 hours, roasting was carried out shrend with pure water after finishing immediately, carries out mechanical disintegration again, sieve 40-140 order silica powder; With high magnetic machine silica powder being carried out deironing then handles;
(3) be to soak 4 days in the mixing acid formed of the hydrofluoric acid of 30% hydrochloric acid, 30% nitric acid and 15% the silica powder input after the deironing by mass percent concentration, the weight ratio of hydrochloric acid, nitric acid, hydrofluoric acid is 2: 1: 1; Soaking the back will soak slurry to be concentrated into concentration be 45% under 45 ℃; Must soak slurry;
(4) will soak slurry drops in the ultrasonoscope, adding the mixed solution of being made up of kerosene, oleic acid and ethanol again carries out high temperature and mixes and wash under 500 ℃ of conditions, the weight of mixed solution is for soaking 30% of slurry weight, mix when washing and regulate pH value to 7.5 with ammoniacal liquor, kerosene, oleic acid, alcoholic acid weight ratio are 2: 1: 1 in the mixed solution; Must mix the pulp washing material;
(5) will mix the pulp washing material and drop in the chlorination reaction still, and carry out high-temp chlorination and handle mixing the pulp washing material under 1400 ℃ of conditions, be that 30% hydrochloric acid carried out high-temperature chlorination 2.0 hours by chlorine, tetrachloromethane and mass percent concentration during processing; Dry after the reaction, deironing handles, the magneticstrength of high magnetic machine is 2200KA/m during deironing; Get the glass sand of total impurities content less than 30ppm;
(6) after glass sand drops into and to carry out melting in the quartz continuous melting furnace, be drawn into diameter and be 1.5 quartz glass tube; Get quartz glass tube then, using by mass percent concentration is that the mixed solution that the hydrofluoric acid of 30% hydrochloric acid and 15% is formed carries out pickling, and the weight ratio of hydrochloric acid, hydrofluoric acid is 3: 1; After the pickling quartz glass tube is cut, burns mouth, ultrasonic cleaning and deshydroxy and handle, get finished product.
Embodiment 3.A kind of production technique of superfine high-purity quartz glass pipe for high-temperature sensor, its step is as follows:
(1) optimum break is 20-30mm, SiO
2Content is that the quartz wedge more than 99% is a raw material; With raw material drop into mass percent concentration be soak 24 hours in 20% the hydrochloric acid after, with pure water wash-out hydrochloric acid, until the electric conductivity of wash-out water less than 60us/cm; Get the quartzy material of pickling;
(2) the quartzy material of pickling is dropped in the stoving oven, 880 ℃ of following roastings 4 hours, roasting was carried out shrend with pure water after finishing immediately, carries out mechanical disintegration again, sieve 40-140 order silica powder; With high magnetic machine silica powder being carried out deironing then handles;
(3) be to soak 5 days in the mixing acid formed of the hydrofluoric acid of 20% hydrochloric acid, 20% nitric acid and 10% the silica powder input after the deironing by mass percent concentration, the weight ratio of hydrochloric acid, nitric acid, hydrofluoric acid is 1: 1: 1; Soaking the back will soak slurry to be concentrated into concentration be 38% under 42 ℃; Must soak slurry;
(4) will soak slurry drops in the ultrasonoscope, adding the mixed solution of being made up of kerosene, oleic acid and ethanol again carries out high temperature and mixes and wash under 400 ℃ of conditions, the weight of mixed solution is for soaking 22% of slurry weight, mix when washing and regulate pH value to 7.4 with ammoniacal liquor, kerosene, oleic acid, alcoholic acid weight ratio are 1: 1: 1 in the mixed solution; Must mix the pulp washing material;
(5) will mix the pulp washing material and drop in the chlorination reaction still, and carry out high-temp chlorination and handle mixing the pulp washing material under 1000 ℃ of conditions, be that 20% hydrochloric acid carried out high-temperature chlorination 1 hour by chlorine, tetrachloromethane and mass percent concentration during processing; Dry after the reaction, deironing handles, the magneticstrength of high magnetic machine is 2000KA/m during deironing; Get the glass sand of total impurities content less than 30ppm;
(6) after glass sand drops into and to carry out melting in the quartz continuous melting furnace, be drawn into diameter and be 1.4 quartz glass tube; Get quartz glass tube then, using by mass percent concentration is that the mixed solution that the hydrofluoric acid of 20% hydrochloric acid and 10% is formed carries out pickling, and the weight ratio of hydrochloric acid, hydrofluoric acid is 2.5: 1; After the pickling quartz glass tube is cut, burns mouth, ultrasonic cleaning and deshydroxy and handle, get finished product; Vacuum tightness when deshydroxy is really handled is not less than 1 * 10
-4, temperature is not less than 1500 ℃, soaking time greater than 12 hours.
The finished product quartz glass tube of making is detected, and its key technical indexes is as follows: diameter:
(1.4 external diameter) mm; Wall thickness: 0.40mm; The no gas line bubble in surface; Lose circularity less than 0.01mm; Total impurities content: 15ppm; Hydroxy radical content: 3ppm; Good toughness, processability is good, the inwall cleaning.
Claims (5)
1. a pyrostat is characterized in that its step is as follows with the production technique of quartz glass tube:
(1) optimum break is 20-30mm, SiO
2Content is that the quartz wedge more than 99% is a raw material; With raw material drop in the hydrochloric acid that mass percent concentration is 10-30% soak 20-40 hour after, with pure water wash-out hydrochloric acid, until the electric conductivity of wash-out water less than 60us/cm; Get the quartzy material of pickling;
(2) the quartzy material of pickling is dropped in the stoving oven, at 850 ℃ of-900 ℃ of following roasting 3-5 hours, roasting was carried out shrend with pure water after finishing immediately, carries out mechanical disintegration again, sieve 40-140 order silica powder; With high magnetic machine silica powder being carried out deironing then handles;
(3) be to soak 4-6 days in the mixing acid formed of the hydrofluoric acid of the nitric acid of hydrochloric acid, 10-30% of 10-30% and 5-15% by mass percent concentration with the silica powder input after the deironing, the weight ratio of hydrochloric acid, nitric acid, hydrofluoric acid is 1-2: 1-2: 1-2; Soaking the back will soak slurry to be concentrated into concentration be 30-45% under 40-45 ℃; Must soak slurry;
(4) will soak slurry drops in the ultrasonoscope, adding the mixed solution of being made up of kerosene, oleic acid and ethanol again carries out high temperature and mixes and wash under 300-500 ℃ of condition, the weight of mixed solution is for soaking the 15-30% of slurry weight, mix when washing and regulate the pH value to 7.3-7.5 with ammoniacal liquor, kerosene, oleic acid, alcoholic acid weight ratio are 1-2: 1-2: 1-2 in the mixed solution; Must mix the pulp washing material;
(5) will mix the pulp washing material and drop in the chlorination reaction still, and carry out high-temp chlorination and handle mixing the pulp washing material under 500-1400 ℃ of condition, be that the hydrochloric acid of 10-30% carried out high-temperature chlorination 0.5-2.0 hour by chlorine, tetrachloromethane and mass percent concentration during processing; Dry after the reaction, deironing handles, the magneticstrength of high magnetic machine is 1800-2200KA/m during deironing; Get the glass sand of total impurities content less than 30ppm;
(6) after glass sand drops into and carries out melting in the quartz continuous melting furnace, be drawn into the quartz glass tube that diameter is 1.3-1.5; Get quartz glass tube then, using by mass percent concentration is that the mixed solution that the hydrofluoric acid of the hydrochloric acid of 10-30% and 5-15% is formed carries out pickling, and the weight ratio of hydrochloric acid, hydrofluoric acid is 2-3: 1; After the pickling quartz glass tube is cut, burns mouth, ultrasonic cleaning and deshydroxy and handle, get finished product.
2. pyrostat according to claim 1 is characterized in that with the production technique of quartz glass tube in step (1), it is 24 hours that raw material drops into the time of soaking in the hydrochloric acid.
3. the pyrostat according to claim 1 production technique of quartz glass tube, it is characterized in that: in the mixing acid of step (3), the weight ratio of hydrochloric acid, nitric acid, hydrofluoric acid is 1: 1: 1.
4. the pyrostat according to claim 1 production technique of quartz glass tube, it is characterized in that: in step (4), kerosene, oleic acid, alcoholic acid weight ratio are 1: 1: 1.
5. the pyrostat according to claim 1 production technique of quartz glass tube, it is characterized in that: in step (6), the vacuum tightness when deshydroxy is really handled is not less than 1 * 10
-4, temperature is not less than 1500 ℃, soaking time greater than 12 hours.
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| CN106082238A (en) * | 2016-06-01 | 2016-11-09 | 安徽晶晶石英科技有限公司 | A kind of method of purification of quartz sand |
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| CN106882918B (en) * | 2017-04-08 | 2023-07-21 | 贵州大学 | Micro-nano nozzle forging instrument and forging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186455A (en) * | 2007-12-17 | 2008-05-28 | 段其九 | Preparation method of quartz sand used for quartz crucible |
| CN101259963A (en) * | 2008-02-05 | 2008-09-10 | 锦州新世纪石英玻璃有限公司 | Method for producing solar energy stage polycrystalline silicon by using high-pure quartz sand as raw material |
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2010
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| CN101186455A (en) * | 2007-12-17 | 2008-05-28 | 段其九 | Preparation method of quartz sand used for quartz crucible |
| CN101259963A (en) * | 2008-02-05 | 2008-09-10 | 锦州新世纪石英玻璃有限公司 | Method for producing solar energy stage polycrystalline silicon by using high-pure quartz sand as raw material |
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