Chlorination roasting device

Abstract

The invention provides a chloridizing roasting device. The chloridizing roasting device comprises a base, a quartz tube, blades, a discharging scraping plate, a transmission mechanism, an air inlet pipe and a heating mechanism. The blades are arranged in the quartz tube, when the quartz tube rotates, the blades can effectively bring quartz sand at the bottom of the quartz tube to the upper portion of the quartz tube, then the quartz sand is thrown down from the upper portion of the quartz tube by means of the gravity of the quartz sand, and in the throwing process, the surface of the quartz sand makes full contact with chlorine serving as a chlorinating agent to react; the technical problem that in the prior art, quartz sand at the bottom of a quartz tube cannot make full contact with chlorinating agent chlorine is solved. And meanwhile, the quartz sand accumulated at the bottom of the discharging end of the quartz tube can be effectively guided out by utilizing the discharging scraper arranged in the quartz tube, so that the discharging efficiency is improved. Therefore, the effect of effectively removing impurities in the quartz sand can be achieved, and the purity of the quartz sand is improved.

Description

Technical Field

[0001] The present application relates to the technical field of quartz ore processing equipment, and in particular to a chlorination roasting device. Background Art

[0002] As the market demand for quartz sand increases, the purity requirements for quartz sand are also getting higher and higher. The IOTA standard quartz sand requires that the total amount of alkali metal elements is no more than 2.4×10-6. The high-purity quartz sand required for process tubes, silicon wafer processing, quartz blocks, and semiconductor crucibles for extracting single crystal silicon requires that the total amount of alkali metal elements is no more than 1.4×10-6. The high-purity quartz sand required for CZ-type crucibles requires that the total amount of alkali metal elements is no more than 0.5×10-6. The high-purity quartz sand required for 12-inch or larger silicon wafers requires that the total amount of alkali metal elements is no more than 0.08×10-6.

[0003] In the prior art, physical purification cannot remove quartz ore impurities, and chemical deep purification is required. Chemical deep purification mainly includes acid (alkali, salt) treatment and heat treatment. Acid (alkali, salt) treatment mainly removes impurities that exist on the surface of quartz sand particles in the form of inclusions or embedded in particles. Heat treatment mainly uses high temperature to remove isomorphous impurities in inclusions or lattices. Among them, chlorination roasting is the most important and effective method to remove quartz lattice impurities, alkali metals and other interstitial atomic impurities. Since the heating temperature of chlorination roasting is high (above 1200°C), the heating container of chlorination roasting generally adopts quartz tube. At present, ordinary cylindrical quartz tubes are used in the market. When the quartz tube rotates, the quartz sand inside is driven to roll, which allows the quartz sand to fully react with the chlorinating agent and moves forward along the inclined quartz tube wall. Since the quartz sand has a very fine particle size and good fluidity, the quartz sand inside cannot be fully driven to roll when the quartz tube rotates. The quartz sand is always deposited at the bottom of the quartz tube, resulting in the chlorinating agent only reacting with a layer of quartz sand on the surface, which seriously affects the actual chlorination efficiency and fails to achieve the effect of removing alkali metal impurities.

[0004] In view of this, the present application provides a chlorination roasting device which can effectively improve the efficiency of the chlorination reaction. Summary of the invention

[0005] In order to solve the above technical problems, the chlorination roasting device provided in the present application installs multiple blades on the inner wall of the quartz tube. The multiple blades drive the quartz sand in the quartz tube to roll and scatter, so that the quartz sand can fully contact with the chlorinating agent chlorine to react, effectively solving the technical problem in the prior art that the quartz sand in the quartz tube cannot fully contact with the chlorinating agent.

[0006] The present application embodiment provides a chlorination roasting device, comprising:

[0007] Pedestal;

[0008] A quartz tube, wherein the quartz tube is rotatably connected to the base, and a feed inlet and a discharge outlet are respectively provided at both ends of the quartz tube;

[0009] A plurality of blades, wherein the plurality of blades are fixedly connected to the inner wall of the quartz tube and are used to turn over the material inside the quartz tube;

[0010] A discharging scraper, which is fixedly arranged in an inclined manner in the quartz tube and located at one end of the discharging port, and is used to bring out the quartz sand after the reaction at the bottom of the inner side of the quartz tube;

[0011] A transmission mechanism, the transmission mechanism is connected to the quartz tube and is used to drive the quartz tube to rotate on the base;

[0012] An air inlet pipe, the air inlet end of which passes through the end of the quartz tube and is placed inside the quartz tube;

[0013] A heating mechanism is located outside the quartz tube and is used to heat the quartz tube.

[0014] In some embodiments, the plurality of blades are evenly distributed on the inner wall of the quartz tube along the circumferential direction.

[0015] In some embodiments, a plurality of the discharging scrapers are provided, and the plurality of discharging scrapers are arranged in a ring shape inside the quartz tube and form a necking structure corresponding to the discharging port.

[0016] In some embodiments, a support plate for supporting the air inlet pipe is fixedly connected to the interior of the quartz tube, and the support plate and the blades are staggered.

[0017] In some embodiments, two supporting wheels are symmetrically connected to the base, and both ends of the quartz tube are rotatably connected to the two supporting wheels respectively.

[0018] In some embodiments, a feed pipe and a discharge pipe are also included, wherein the feed pipe is connected to the feed port, the discharge pipe is connected to the discharge port, and the outer side of the feed pipe is connected to a feed sleeve fixedly set on the base, and the outer side of the discharge pipe is connected to a discharge sleeve fixedly set on the base.

[0019] In some embodiments, a cooling pipe is further included, wherein the cooling pipe is connected to the discharge pipe for cooling the discharged material.

[0020] In some embodiments, a heat-insulating layer is further included, which is located on the machine base and covers the outer sides of the quartz tube and the heating mechanism.

[0021] In some embodiments, the heating mechanism is uniformly arranged heating rods or heating coils.

[0022] In some embodiments, the plurality of blades are obliquely disposed on the inner wall of the quartz tube, or the plurality of blades are disposed on the inner wall of the quartz tube parallel to the central axis of the quartz tube.

[0023] Compared with the prior art, the chlorination roasting device provided by the present application is provided with a plurality of blades in the quartz tube. When the quartz tube rotates, the plurality of blades can effectively bring the quartz sand at the bottom of the quartz tube to the upper part of the quartz tube, and then the quartz sand is thrown down from the upper part of the quartz tube by its own gravity. During the throwing process, the surface of the quartz sand is fully in contact with the chlorinating agent chlorine gas and then reacts, which solves the technical problem that the quartz sand at the bottom of the quartz tube cannot be fully in contact with the chlorinating agent chlorine gas in the prior art; at the same time, the quartz sand accumulated at the bottom of the quartz tube discharging end can be effectively guided out by using the discharging scraper provided in the quartz tube, thereby improving the discharging efficiency. Therefore, the present application can effectively remove the effect of quartz sand impurities and improve the purity of quartz sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only used for the purpose of illustrating some embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0025] Figure 1 The structure cross-sectional view of the chlorination roasting device provided in the present application is shown;

[0026] Figure 2 shows a three-dimensional perspective view of the quartz tube provided by the present application,

[0027] Figure 3 shows a front view of the quartz tube provided by the present application,

[0028] Figure 4 yes Figure 3 AA section view,

[0029] Figure 5 yes Figure 3 BB cross-sectional view.

[0030] The reference numerals in the specific implementation manner are as follows:

[0031] 1. Base, 2. Quartz tube, 21. Blade, 22. Discharge scraper, 23. Support plate, 3. Inlet pipe, 4. Support wheel, 5. Feed pipe, 6. Discharge pipe, 7. Feed sleeve, 8. Discharge sleeve, 9. Cooling pipe, 10. Heating rod, 11. Insulation layer. DETAILED DESCRIPTION

[0032] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and so on should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the description of this specification, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0034] See also Figure 1-Figure 5 As shown, a chlorination roasting device provided in an embodiment of the present application includes:

[0035] Base 1;

[0036] A quartz tube 2, wherein the quartz tube 2 is rotatably connected to the base 1, and a feed port and a discharge port are respectively provided at both ends of the quartz tube 2;

[0037] A plurality of blades 21, wherein the plurality of blades 21 are fixedly connected to the inner wall of the quartz tube 2 and are used to turn over the material inside the quartz tube 2;

[0038] A discharging scraper 22, which is fixedly disposed in an inclined manner in the quartz tube 2 and located at one end of the discharging port, and is used to carry out the quartz sand after the reaction at the bottom of the inner side of the quartz tube 2;

[0039] A transmission mechanism (not shown in the figure), which is connected to the quartz tube 2 and is used to drive the quartz tube 2 to rotate on the base 1;

[0040] An air inlet pipe 3, the air inlet end of the air inlet pipe 3 passes through the end of the quartz tube 2 and is placed inside the quartz tube 2;

[0041] A heating mechanism is located outside the quartz tube 2 and is used for heating the quartz tube 2 .

[0042] In the above embodiment, the quartz tube 2 is rotatably connected to the base 1, and a plurality of blades 21 are arranged in the quartz tube 2. When the quartz tube 2 rotates on the base 1, the plurality of blades 21 can effectively bring the quartz sand at the bottom of the quartz tube 2 to the upper part of the quartz tube 2, and then the quartz sand is thrown down from the upper part of the quartz tube 2 by its own gravity. During the throwing process, the surface of the quartz sand is fully contacted with the chlorinating agent chlorine gas and then reacts. The generated gas chloride can be discharged through the external exhaust system, thereby achieving the effect of removing quartz sand impurities. The device solves the technical problem that the quartz sand at the bottom of the quartz tube 2 cannot be fully contacted with the chlorinating agent chlorine gas in the prior art; at the same time, the quartz sand accumulated at the bottom of the discharging end of the quartz tube 2 can be effectively led out by using the discharging scraper 22 arranged in the quartz tube 2, thereby improving the discharging efficiency. Therefore, the present application can effectively remove the effect of quartz sand impurities and improve the purity of quartz sand.

[0043] In the above embodiment, the blade 21 can be made into a whole, or can be made into a component composed of several sections connected into a whole, which can be specifically determined according to the manufacturing process of the quartz tube.

[0044] In some embodiments, the plurality of blades 21 are evenly distributed on the inner wall of the quartz tube 2 along the circumferential direction.

[0045] In the above embodiment, the number and size of the blades 21 in the quartz tube 2 can be determined according to the manufacturing process of the quartz tube 2 and the actual use effect, and are generally 3 to 8, and are evenly distributed along the circumferential direction of the quartz tube 2. Among them, the plurality of blades 21 can be arranged parallel to the central axis of the quartz tube 2, or can be obliquely arranged on the inner wall of the quartz tube 2, so that the blades 21 and the inner wall of the quartz tube 2 form a certain inclination angle, thereby adjusting the residence time of the quartz sand in the quartz tube 2, and further providing a guarantee for the purification of the quartz sand.

[0046] In some embodiments, a plurality of the discharging scrapers 22 are provided, and the plurality of discharging scrapers 22 are arranged in a ring shape inside the quartz tube 2 and form a necking structure corresponding to the discharging port.

[0047] In the above embodiment, a plurality of discharge scrapers 22 are evenly arranged in a ring shape inside the quartz tube 2 and form a necking structure, based on which the quartz sand at one end of the discharge port is guided, and the reacted quartz sand is brought out of the quartz tube 2.

[0048] In some embodiments, a support plate 23 for supporting the air inlet pipe 3 is fixedly connected to the interior of the quartz tube 2 , and the support plate 23 and the blades 21 are staggered.

[0049] In the above embodiment, the support plate 23 is fixedly arranged inside the quartz tube 2, so that the air inlet pipe 3 extending into the quartz tube 2 can be supported by the support plate 23, thereby preventing the slender air inlet pipe 3 from being broken due to the impact of falling quartz sand at high temperature.

[0050] In some embodiments, two supporting wheels 4 are symmetrically connected to the base 1 , and both ends of the quartz tube 2 are rotatably connected to the two supporting wheels 4 .

[0051] In the above embodiment, each supporting wheel 4 is connected to a bearing, and both ends of the quartz tube 2 are rotatably connected to the corresponding supporting wheel 4 through corresponding bearings, which can effectively reduce the friction between the end of the quartz tube 2 and the supporting wheel 4, thereby extending the service life of the component.

[0052] In some embodiments, a feed pipe 5 and a discharge pipe 6 are also included, wherein the feed pipe 5 is connected to the feed port, and the discharge pipe 6 is connected to the discharge port, and the outer side of the feed pipe 5 is connected to a feed sleeve 7 fixedly set on the base 1, and the outer side of the discharge pipe 6 is connected to a discharge sleeve 8 fixedly set on the base 1.

[0053] In the above embodiment, the feed pipe 5 and the feed sleeve 7 are used to transport the quartz sand to be processed from the feed port to the quartz tube 2, and the quartz sand after the reaction can be taken out from the discharge port through the discharge pipe 6 and the discharge sleeve 8, which is beneficial to the operator's feeding and discharging operations.

[0054] In some embodiments, a cooling pipe 9 is further included, and the cooling pipe 9 is connected to the discharge pipe 6 for cooling the discharged material.

[0055] In the above embodiment, by providing a cooling pipe 9 connected to the discharge pipe 6, the cooling pipe 9 can be used to cool the quartz sand entering the cooling pipe 9, thereby providing a prerequisite for subsequent processes.

[0056] In some embodiments, a heat-insulating layer 11 is further included. The heat-insulating layer 11 is located on the machine base 1 and covers the outer sides of the quartz tube 2 and the heating mechanism.

[0057] In the above embodiment, the heating mechanism is uniformly arranged heating rods 10, and the quartz tube 2 can be heated by using multiple heating rods 10 so that the internal temperature of the quartz tube 2 reaches the desired temperature value; the insulation layer 11 can insulate the heating rods 10 and the quartz tube 2 to prevent heat loss from affecting the chlorination reaction inside the quartz tube 2. In other embodiments, the heating mechanism can also be a heating coil placed under the quartz tube 2 (not shown in the figure), or a heating coil wrapped around the outside of the quartz tube 2 (not shown in the figure).

[0058] The above is a detailed introduction to a chlorination roasting device provided by the present application. Specific examples are used in this article to illustrate the principle and implementation method of the present application. The description of the above embodiments is only used to help understand the core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A chlorination roasting device, characterized in that: include: Pedestal; A quartz tube, wherein the quartz tube is rotatably connected to the base, and a feed inlet and a discharge outlet are respectively provided at both ends of the quartz tube; A plurality of blades, wherein the plurality of blades are fixedly connected to the inner wall of the quartz tube and are used to turn over the material inside the quartz tube; A discharging scraper, which is fixedly arranged in an inclined manner in the quartz tube and located at one end of the discharging port, and is used to bring out the quartz sand after the reaction at the bottom of the inner side of the quartz tube; A transmission mechanism, the transmission mechanism is connected to the quartz tube and is used to drive the quartz tube to rotate on the base; An air inlet pipe, the air inlet end of which passes through the end of the quartz tube and is placed inside the quartz tube; A heating mechanism is located outside the quartz tube and is used to heat the quartz tube.

2. The chlorination roasting device according to claim 1, characterized in that: The plurality of blades are evenly distributed on the inner wall of the quartz tube along the circumferential direction.

3. The chlorination roasting device according to claim 2, characterized in that: There are multiple discharging scrapers, which are arranged in a ring shape inside the quartz tube and form a constriction structure corresponding to the discharging port.

4. The chlorination roasting device according to claim 3, characterized in that: A support plate for supporting the air inlet pipe is fixedly connected inside the quartz tube, and the support plate and the blades are staggered.

5. The chlorination roasting device according to claim 4, characterized in that: The base is symmetrically connected to two supporting wheels, and both ends of the quartz tube are rotatably connected to the two supporting wheels respectively.

6. The chlorination roasting device according to claim 5, characterized in that: It also includes a feed pipe and a discharge pipe, wherein the feed pipe is connected to the feed port, the discharge pipe is connected to the discharge port, and the outside of the feed pipe is connected to a feed sleeve fixedly arranged on the base, and the outside of the discharge pipe is connected to a discharge sleeve fixedly arranged on the base.

7. The chlorination roasting device according to claim 5, characterized in that: It also includes a cooling pipe, which is connected to the discharge pipe and is used to cool the discharged material.

8. The chlorination roasting device according to claim 5, characterized in that: The machine also comprises a heat-insulating layer, which is located on the machine base and covers the outer sides of the quartz tube and the heating mechanism.

9. The chlorination roasting device according to claim 5, characterized in that: The heating mechanism is uniformly arranged heating rods or heating coils.

10. The chlorination roasting device according to claim 1, characterized in that: A plurality of blades are arranged on the inner wall of the quartz tube in an inclined manner, or a plurality of blades are arranged on the inner wall of the quartz tube in parallel with the central axis of the quartz tube.

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