阅读说明：本技术 一种新型石英炉管生产工艺 (Novel quartz furnace tube production process ) 是由 陈小三 于 2020-12-02 设计创作，主要内容包括：本发明公开了一种新型石英炉管生产工艺,生产工艺如下：步骤一：SiO_2含量在99.95％以上的石英原石通过颚式破碎机进行破碎,破碎后对石英颗粒加热,加热后将石英颗粒倒入水中进行冷却；步骤二：冷却后对石英颗粒进行过滤并干燥,干燥后,干燥后进行研磨,研磨出的细砂送入制浆机中,制成砂浆；步骤三：将砂浆送入脱泥机中进行脱泥,脱泥后送入水力分级机进行分级；本发明的有益效果是：破碎后对石英颗粒加热,加热后将石英颗粒倒入水中进行冷却,较大的温度变化和热胀冷缩作用使石英颗粒中的气泡和杂质被移动清除,有助于使得石英颗粒产生均匀的裂纹,便于后期进行研磨；经过多道工序进一步增加除杂效果,降低了生产能耗,提高制备石英炉管的品质。(The invention discloses a novel quartz furnace tube production process, which comprises the following steps: the method comprises the following steps: SiO 2 2 Crushing the quartz stone with the content of more than 99.95% by using a jaw crusher, heating quartz particles after crushing, pouring the heated quartz particles into water, and cooling; step two: cooling, filtering and drying the quartz particles, drying, grinding, and sending the ground fine sand into a pulping machine to prepare mortar; step three: conveying the mortar into a desliming machine for desliming, and conveying the deslimed mortar into a hydraulic classifier for classification; the invention has the beneficial effects that: heating the quartz particles after crushing, pouring the quartz particles into water for cooling after heating, and removing bubbles and impurities in the quartz particles by movement under the action of large temperature change and thermal expansion and cold contraction, thereby being beneficial to generating uniform cracks on the quartz particles,the grinding at the later stage is convenient; and the impurity removal effect is further improved through a plurality of processes, the production energy consumption is reduced, and the quality of the quartz furnace tube is improved.)

1. A novel quartz furnace tube production process is characterized in that: the production process comprises the following steps:

the method comprises the following steps: SiO 2₂Crushing the quartz stone with the content of more than 99.95% by using a jaw crusher, heating quartz particles after crushing, pouring the heated quartz particles into water, and cooling;

step two: cooling, filtering and drying the quartz particles, drying, grinding, and sending the ground fine sand into a pulping machine to prepare mortar;

step three: conveying the mortar into a desliming machine for desliming, and conveying the deslimed mortar into a hydraulic classifier for classification;

step four: sending the classified quartz particles into a magnetic separator, and removing metal impurities in the quartz particles;

step five: after magnetic separation, immersing the magnetic-separation-type magnetic-separation material into acid liquor for acid washing, and after acid washing, carrying out flotation by adopting a flotation machine;

step six: washing and dewatering after flotation;

step seven: after dehydration, irradiating by using microwave to obtain high-purity quartz powder;

step eight: feeding high-purity quartz powder into a graphite rod heating furnace for melting;

step nine: and starting the variable-frequency tractor to control the pipe diameter and the speed of the quartz furnace tube molding until the quartz tube molding is achieved.

2. The novel quartz furnace tube production process of claim 1, wherein: in the first step, the quartz particles are heated to 900 ℃ of 700 ℃ after being crushed, and the quartz particles are poured into water for cooling after being heated.

3. The novel quartz furnace tube production process of claim 1, wherein: in the second step, the water content after drying is less than 6%.

4. The novel quartz furnace tube production process of claim 1, wherein: in the fourth step, the magnetic field intensity of the magnetic separator is 16000-.

5. The novel quartz furnace tube production process of claim 1, wherein: in the fifth step, the acid is washed by a mixed aqueous solution of 15% hydrochloric acid, 10% nitric acid and 5% HF.

6. The novel quartz furnace tube production process of claim 1, wherein: in the seventh step, during microwave irradiation, the frequency of the microwave is 2x 1010-2 x 1011 Hz, and the treatment time is 1-3 h.

7. The novel quartz furnace tube production process of claim 1, wherein: in the step eight, the high-purity quartz powder is sent into a graphite rod heating furnace to be melted for 5-9h at 2000-2200 ℃.

Technical Field

The invention belongs to the technical field of quartz furnace tubes, and particularly relates to a novel production process of a quartz furnace tube.

Background

According to different requirements, a plurality of glasses are made into a plurality of special glasses with certain strength and are used in a plurality of common glasses which cannot reach special fields. Such as colored glass, coated glass, hollow glass, tempered glass, wired glass, laminated glass, etc., and so on, it can be said that the operation of any industry is related to glass at present. The development of the glass is further improved by a step due to the appearance of the quartz glass.

The most original glass product is developed to the extent that glass becomes an indispensable product in our lives, even the most original glass product is used in all trades, and the traveling of quartz glass brings great significance to people.

The quartz glass has high chemical stability, can resist the corrosion of various acids, aqua regia, neutral salt, sulfur and carbon at normal temperature and high temperature besides hydrofluoric acid and hot phosphoric acid, has the chemical stability 150 times larger than that of the nickel-chromium alloy and the ceramic, and is a good acid-resistant material.

Quartz glass is an acidic substance, is inferior in alkali resistance and alkali resistance, and can form soluble silicate with this type of reagent, so that it is not suitable for use in an apparatus for producing a strongly alkaline reaction. Below 800 ℃, quartz glass is virtually free from metal oxide attack except for PbO; reacting with ZnO and R2O (R represents alkali metal) at 800 deg.C or above; more than 900 ℃ with BaO, MgO and Fe₂O₃Reacting with AI at a temperature of over 1000 ℃₂O₃CaO reacts. The molten metal has different corrosivity to quartz glass, and quartz furnace tubes are purchased, are resistant to corrosion by Ag, Au, Cd, Hg, Pt, Mo, Sn, W and Zn, are good, react with Ca at a temperature of above 600 ℃, react with Al, Le and Mg at a temperature of above 800 ℃ and react with Li at a temperature of above 250 ℃.

Quartz glass tubes are special industrial technical glass made of silica and are a very good base material. The quartz glass has a series of excellent physical and chemical properties. The softening point temperature of the quartz glass is about 1730 ℃, the quartz glass can be used for a long time at 1100 ℃, the short-time use temperature can reach 1450 ℃, the quartz glass hardly has chemical reaction with other acid substances except hydrofluoric acid, the acid resistance of the quartz glass is 30 times that of ceramic and 150 times that of stainless steel, and the chemical stability of the quartz glass at high temperature is incomparable with that of any other engineering materials.

In order to reduce production energy consumption and improve the quality of a quartz furnace tube, a novel quartz furnace tube production process is provided.

Disclosure of Invention

The invention aims to provide a novel quartz furnace tube production process, which reduces the production energy consumption and improves the quality of the prepared quartz furnace tube.

In order to achieve the purpose, the invention provides the following technical scheme: a novel quartz furnace tube production process comprises the following steps:

the method comprises the following steps: SiO 2₂Crushing the quartz stone with the content of more than 99.95% by using a jaw crusher, heating quartz particles after crushing, pouring the heated quartz particles into water, and cooling;

step two: cooling, filtering and drying the quartz particles, drying, grinding, and sending the ground fine sand into a pulping machine to prepare mortar;

step three: conveying the mortar into a desliming machine for desliming, and conveying the deslimed mortar into a hydraulic classifier for classification;

step four: sending the classified quartz particles into a magnetic separator, and removing metal impurities in the quartz particles;

step five: after magnetic separation, immersing the magnetic-separation-type magnetic-separation material into acid liquor for acid washing, and after acid washing, carrying out flotation by adopting a flotation machine;

step six: washing and dewatering after flotation;

step seven: after dehydration, irradiating by using microwave to obtain high-purity quartz powder;

step eight: feeding high-purity quartz powder into a graphite rod heating furnace for melting;

step nine: and starting the variable-frequency tractor to control the pipe diameter and the speed of the quartz furnace tube molding until the quartz tube molding is achieved.

As a preferable technical scheme of the invention, in the step one, the quartz particles are heated to 900 ℃ after being crushed, and then poured into water for cooling after being heated.

In a preferred embodiment of the present invention, in the second step, the moisture content after drying is less than 6%.

As a preferred technical solution of the present invention, in the fourth step, the magnetic field strength of the magnetic separator is 16000-.

In a preferred embodiment of the present invention, in the fifth step, the acid is washed with an aqueous solution of a mixture of 15% hydrochloric acid, 10% nitric acid, and 5% HF.

In the seventh step, the frequency of the microwave is 2x 1010 to 2x 1011 Hz and the treatment time is 1 to 3 hours.

In the eighth step, the high-purity quartz powder is fed into a graphite rod heating furnace to be melted for 5-9h at 2000-2200 ℃.

Compared with the prior art, the invention has the beneficial effects that:

(1) heating the quartz particles after crushing, pouring the quartz particles into water for cooling after heating, and removing bubbles and impurities in the quartz particles by movement under the action of large temperature change and expansion and contraction, so that the quartz particles can generate uniform cracks and are convenient to grind at the later stage;

(2) and the impurity removal effect is further improved through a plurality of processes, the production energy consumption is reduced, and the quality of the quartz furnace tube is improved.

Drawings

FIG. 1 is a flow chart of the production process of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the present invention provides a technical solution: a novel quartz furnace tube production process comprises the following steps:

the method comprises the following steps: SiO 2₂The content is more than 99.95 percentThe quartz stone is crushed by a jaw crusher, quartz particles are heated to 700 ℃ after being crushed, the quartz particles are poured into water for cooling after being heated, and bubbles and impurities in the quartz particles are removed by large temperature change and expansion and contraction, so that the quartz particles can generate uniform cracks, and the later grinding is facilitated;

step two: cooling, filtering and drying the quartz particles, wherein the water content after drying is less than 6%, grinding after drying, and sending the ground fine sand into a pulping machine to prepare mortar;

step three: conveying the mortar into a desliming machine for desliming, and conveying the deslimed mortar into a hydraulic classifier for classification;

step four: sending the classified quartz particles into a magnetic separator, and removing metal impurities in the quartz particles, wherein the magnetic field intensity of the magnetic separator is 16000 GS;

step five: after magnetic separation, immersing the magnetic-separation-free magnetic-separation device into acid liquor for acid washing, and after acid washing, carrying out flotation by using a flotation machine, wherein the acid washing is a mixed aqueous solution of 15% hydrochloric acid, 10% nitric acid and 5;

step six: washing and dewatering after flotation;

step seven: after dehydration, using microwave to irradiate to obtain high-purity quartz powder, wherein the frequency of the microwave is 2x 1010 Hz during microwave irradiation, the treatment time is 3h, and the microwave energy is used for enabling the quartz powder to generate fine cracks so that bubbles, vacuoles and impurities deeply hidden in the quartz powder are removed;

step eight: feeding the high-purity quartz powder into a graphite rod heating furnace to be melted for 9 hours at 2000 ℃;

step nine: and starting the variable-frequency tractor to control the pipe diameter and the speed of the quartz furnace tube molding until the quartz tube molding is achieved.

Example 2

Referring to fig. 1, the present invention provides a technical solution: a novel quartz furnace tube production process comprises the following steps:

the method comprises the following steps: SiO 2₂Crushing crude quartz stone with content of more than 99.95% by a jaw crusher, and heating quartz particles to room temperatureThe quartz particles are poured into water for cooling after being heated at 800 ℃, and bubbles and impurities in the quartz particles are removed by large temperature change and expansion and contraction, so that the quartz particles are beneficial to generating uniform cracks and are convenient to grind at the later stage;

step two: cooling, filtering and drying the quartz particles, wherein the water content after drying is less than 6%, grinding after drying, and sending the ground fine sand into a pulping machine to prepare mortar;

step three: conveying the mortar into a desliming machine for desliming, and conveying the deslimed mortar into a hydraulic classifier for classification;

step four: sending the classified quartz particles into a magnetic separator, and removing metal impurities in the quartz particles, wherein the magnetic field intensity of the magnetic separator is 18000 GS;

step five: after magnetic separation, immersing the magnetic-separation-free magnetic-separation device into acid liquor for acid washing, and after acid washing, carrying out flotation by using a flotation machine, wherein the acid washing is a mixed aqueous solution of 15% hydrochloric acid, 10% nitric acid and 5;

step six: washing and dewatering after flotation;

step seven: after dehydration, using microwave to irradiate to obtain high-purity quartz powder, wherein the frequency of the microwave is 2x 1010 Hz during microwave irradiation, the treatment time is 2h, and the microwave energy is used for enabling the quartz powder to generate fine cracks so that bubbles, vacuoles and impurities deeply hidden in the quartz powder are removed;

step eight: feeding the high-purity quartz powder into a graphite rod heating furnace to be melted for 7 hours at 2100 ℃;

step nine: and starting the variable-frequency tractor to control the pipe diameter and the speed of the quartz furnace tube molding until the quartz tube molding is achieved.

Example 3

Referring to fig. 1, the present invention provides a technical solution: a novel quartz furnace tube production process comprises the following steps:

the method comprises the following steps: SiO 2₂Crushing crude quartz stone with content of more than 99.95% by a jaw crusher, heating quartz particles to 900 deg.C after crushing, pouring the heated quartz particles into water for cooling, and changing temperature greatlyThe action of expansion with heat and contraction with cold enables bubbles and impurities in the quartz particles to be removed, so that uniform cracks are generated in the quartz particles, and the later grinding is facilitated;

step two: cooling, filtering and drying the quartz particles, wherein the water content after drying is less than 6%, grinding after drying, and sending the ground fine sand into a pulping machine to prepare mortar;

step three: conveying the mortar into a desliming machine for desliming, and conveying the deslimed mortar into a hydraulic classifier for classification;

step four: sending the classified quartz particles into a magnetic separator, and removing metal impurities in the quartz particles, wherein the magnetic field intensity of the magnetic separator is 20000 GS;

step five: after magnetic separation, immersing the magnetic-separation-free magnetic-separation device into acid liquor for acid washing, and after acid washing, carrying out flotation by using a flotation machine, wherein the acid washing is a mixed aqueous solution of 15% hydrochloric acid, 10% nitric acid and 5;

step six: washing and dewatering after flotation;

step seven: after dehydration, using microwave to irradiate to obtain high-purity quartz powder, wherein the frequency of the microwave is 2x 1011 Hz during microwave irradiation, the treatment time is 1h, and the microwave energy is used for enabling the quartz powder to generate fine cracks so that bubbles, vacuoles and impurities deeply hidden in the quartz powder are removed;

step eight: feeding the high-purity quartz powder into a graphite rod heating furnace to be melted for 5 hours at 2200 ℃;

step nine: and starting the variable-frequency tractor to control the pipe diameter and the speed of the quartz furnace tube molding until the quartz tube molding is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.