High-purity quartz sand oxygen-free chlorination roasting equipment

Abstract

The utility model discloses high-purity quartz sand oxygen-free chlorination roasting equipment which comprises a roasting section provided with a heat preservation furnace body and a heater, the heat preservation furnace body is arranged on the periphery of the heater in a sleeved mode, the two ends of the heater are respectively provided with a ventilation connector which reacts with sand inside the heater, and the heater maintains an internal oxygen-free environment through the ventilation connectors. Relates to the technical field of quartz sand oxygen-free chlorination roasting. Compared with traditional high-temperature chloridizing roasting equipment, the high-temperature chloridizing roasting equipment has the advantages of being high in heating speed, high in heating efficiency, capable of saving electricity and energy, even in heating, capable of achieving selective heating, good in environmental protection, capable of improving labor conditions, small in occupied area, capable of saving investment, low in maintenance cost and the like, and meanwhile the yield, quality and grade of products can be improved. Meanwhile, new impurities can be prevented from being introduced in the reaction process, and oxidation reaction is avoided.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic chlorination roasting technology for quartz sand, specifically a high-purity quartz sand anaerobic chlorination roasting equipment. Background Technology

[0002] High-purity quartz sand is an indispensable and irreplaceable functional material for high-tech industries such as semiconductors, photovoltaics, precision optics, fiber optic communications, and high-end lighting. Structural impurities in quartz crystals are mainly divided into two categories: lattice substitution impurities and charge compensation impurities. These trace impurities are difficult to activate due to the stable structure of the silicon-oxygen tetrahedron, and therefore are difficult to remove using conventional purification techniques such as flotation, magnetic separation, and acid leaching.

[0003] In the existing technology, "high-iron alkali-alumina type" quartz contains approximately 1000x10-6 lattice Al. Lattice impurities result in poor quality of these quartz deposits, mainly due to chlorination and volatilization of chlorinated impurities during the chlorination roasting process. These impurities can exist in almost any form of chemical substance (e.g., oxides, metals, or other non-volatile salts). Therefore, an oxygen-free environment can prevent the formation of stable and difficult-to-remove oxides, while also preventing micro-contaminants from entering the reaction zone, thereby avoiding the introduction of new impurities during the reaction process.

[0004] Therefore, this application proposes an anaerobic chlorination roasting technology to address this technical challenge. Utility Model Content

[0005] The purpose of this invention is to provide a high-purity quartz sand oxygen-free chlorination roasting equipment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-purity quartz sand oxygen-free chlorination roasting equipment, comprising a roasting section having an insulated furnace body and a heater, wherein the insulated furnace body is fitted around the heater, and both ends of the heater are provided with ventilation ports for reacting with the sand inside, and the heater maintains an oxygen-free environment inside through the ventilation ports.

[0007] As a further embodiment of this utility model: a high-purity quartz sand anaerobic chlorination roasting device, wherein the air inlet includes an inlet section and a outlet section, the inlet section includes a first high-purity inert gas inlet, and a material conveying section is connected between the inlet section and the roasting section, the first high-purity inert gas inlet, the material conveying section and the heater are sequentially connected; the outlet section includes a second high-purity inert gas inlet and a high-purity chlorine gas inlet, a gas distribution section is connected between the roasting section and the outlet section, and the heater, the gas distribution section and the outlet section are sequentially connected.

[0008] As a further embodiment of this utility model: a high-purity quartz sand anaerobic chlorination roasting equipment, further comprising a front baffle, a first rear baffle, and a second rear baffle, wherein the front baffle, the first rear baffle, and the second rear baffle are all one-way valve structures, and the front baffle provides one-way ventilation to the inlet section and the material passage section, while the first rear baffle and the second rear baffle provide one-way ventilation to the rear inlet section and the gas distribution section.

[0009] As a further embodiment of this utility model: a high-purity quartz sand anaerobic chlorination roasting equipment, wherein the material passage section includes a feeding hopper and a feeder connected to the feeding hopper, and the feeder is connected to a first high-purity inert gas inlet to form a gas self-circulation passage.

[0010] As a further embodiment of this utility model: a high-purity quartz sand anaerobic chlorination roasting equipment, wherein the gas distribution section includes a gas splitter, and the gas splitter is connected to a second high-purity inert gas inlet and a high-purity chlorine gas inlet for gas distribution and processing.

[0011] As a further embodiment of this utility model: a high-purity quartz sand anaerobic chlorination roasting equipment, which also includes a silo cover plate, wherein the silo cover plate is disposed inside the feed silo and the feeder and controls the feed switch.

[0012] As a further embodiment of this utility model: a high-purity quartz sand anaerobic chlorination roasting equipment, further comprising a sealing cap, the sealing cap including a front sealing cap and a rear sealing cap, the front sealing cap being disposed between the material conveying section and the roasting section and for switching control of the material conveying section and the roasting section, and the rear sealing cap being disposed between the gas distribution section and the roasting section and for switching control of the gas distribution section and the roasting section.

[0013] As a further embodiment of this utility model: a high-purity quartz sand anaerobic chlorination roasting equipment, which also includes a waste gas collector, wherein the waste gas collector is used to collect waste gas input from the roasting section to the air inlet section.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Compared to traditional high-temperature chlorination roasting equipment, this application offers advantages such as rapid heating, high heating efficiency, energy saving, uniform heating, selective heating, environmental protection, improved working conditions, small footprint, reduced investment, and low maintenance costs. It can also increase product yield, quality, and grade. Furthermore, it avoids introducing new impurities and oxidation reactions during the reaction process. Its significant advantages are:

[0016] 1. By setting an inlet section and a outlet section at both ends of the heater and simultaneously introducing inert gas, the interior of the heater can be filled with inert gas and a slightly positive pressure environment can be formed. In addition, by using a gas splitting device to separate the inert gas and chlorine gas in the outlet section into the heater, the inert gas and chlorine gas can be used for reaction protection and the reaction of quartz sand respectively, without interference between them.

[0017] 2. Due to the slightly positive pressure environment inside the heater, the middle part of the heater can maintain an oxygen-free environment under the combined action of the front baffle, the first rear baffle, and the second rear baffle, ensuring the normal progress of the quartz sand reaction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the structure and principle of a high-purity quartz sand oxygen-free chlorination roasting equipment according to the present invention.

[0019] In the diagram: 1. Insulation furnace body; 2. Heater; 3. First high-purity inert gas inlet; 4. Second high-purity inert gas inlet; 5. High-purity chlorine gas inlet; 6. Front baffle; 7. First rear baffle; 8. Second rear baffle; 9. Feed hopper; 10. Feeder; 11. Gas distributor; 12. Hopper cover; 13. Front cap; 14. Rear cap; 15. Waste gas collector. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0022] Please see Figure 1In this embodiment of the present invention, a high-purity quartz sand anaerobic chlorination roasting device includes a roasting section comprising an insulated furnace body 1 and a heater 2. The roasting section contains sand. The insulated furnace body 1 is fitted around the heater 2. Both ends of the heater 2 are provided with ventilation ports for reacting with the sand inside. The heater 2 maintains an anaerobic environment inside through the ventilation ports. The ventilation ports include an inlet section and a outlet section. The inlet section includes a first high-purity inert gas inlet 3. A material handling section bridges the inlet section and the roasting section. The first high-purity inert gas inlet 3, the material handling section, and the heater 2 are sequentially connected. The outlet section includes a second high-purity inert gas inlet 4 and a high-purity chlorine gas inlet 5. A bridging section connects the roasting section and the outlet section. The gas distribution section, the heater 2, the gas distribution section and the rear gas inlet section are connected in sequence. The material passage section includes a feed hopper 9 and a feeder 10 connected to the feed hopper 9. The feeder 10 is connected to the first high-purity inert gas inlet 3 and forms a gas self-circulation passage. The gas distribution section includes a gas splitter 11. The gas splitter 11 is connected to the second high-purity inert gas inlet 4 and the high-purity chlorine gas inlet 5 for gas distribution processing. Specifically, by inputting inert gas into the front gas inlet section through the first high-purity inert gas inlet 3 and inert gas into the rear gas inlet section through the second high-purity inert gas inlet 4, the heater 2 can be filled with protective inert gas and the heater 2 can be maintained in a slightly positive pressure environment. At the same time, chlorine gas can react with sand and carry out the chlorination roasting operation of sand.

[0023] Other embodiments of this utility model: A high-purity quartz sand oxygen-free chlorination roasting device, further comprising a front baffle plate 6, a first rear baffle plate 7, and a second rear baffle plate 8. The front baffle plate 6, the first rear baffle plate 7, and the second rear baffle plate 8 are all one-way valve structures. Therefore, the front baffle plate 6, the first rear baffle plate 7, and the second rear baffle plate 8 can only supply inert gas or chlorine gas to the heater 2 in one direction and maintain the oxygen-free roasting of quartz sand in the heater 2. The front baffle plate 6 supplies one-way ventilation to the inlet section and the material passage section, and the first rear baffle plate 7 and the second rear baffle plate 8 supply one-way ventilation to the rear inlet section and the gas distribution section.

[0024] Other embodiments of this utility model: A high-purity quartz sand anaerobic chlorination roasting equipment, further comprising a hopper cover plate 12 and a sealing cap. The hopper cover plate 12 is disposed inside the feed hopper 9 and the feeder 10 and controls the feed switch, and can independently adjust the input amount of quartz sand. The sealing cap includes a front sealing cap 13 and a rear sealing cap 14. The front sealing cap 13 is disposed between the material passage section and the roasting section and is controlled by the switch between the material passage section and the roasting section. The rear sealing cap 14 is disposed between the gas distribution section and the roasting section and is controlled by the switch between the gas distribution section and the roasting section.

[0025] Other embodiments of this utility model: A high-purity quartz sand anaerobic chlorination roasting equipment, further comprising a waste gas collector 15, wherein the waste gas collector 15 is used to collect waste gas input from the roasting section to the air inlet section, thereby avoiding indiscriminate discharge and environmental pollution.

[0026] The working principle of this invention is as follows: by setting an inlet section and a outlet section at both ends of the heater 2 and simultaneously introducing inert gas, the interior of the heater 2 can be filled with inert gas and a slightly positive pressure environment can be formed. In addition, the inert gas and chlorine gas in the outlet section are separated and introduced into the heater 2 through the gas diversion device 11, so that the inert gas and chlorine gas can separately carry out reaction protection and the reaction operation of quartz sand without interference.

[0027] Due to the slightly positive pressure environment inside heater 2, the middle part of heater 2 can maintain an oxygen-free environment under the combined action of front baffle 6, first rear baffle 7 and second rear baffle 8, ensuring the normal progress of the quartz sand reaction.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-purity quartz sand anaerobic chlorination roasting equipment, characterized in that, The furnace includes a calcination section with a heat-insulating furnace body (1) and a heater (2). The heat-insulating furnace body (1) is fitted around the outer periphery of the heater (2). Both ends of the heater (2) are provided with ventilation ports that react with the sand inside. The heater (2) maintains an oxygen-free environment inside through the ventilation ports.

2. A high purity quartz sand oxygen-free chloridizing roasting apparatus according to claim 1, characterized in that, The ventilation interface includes an inlet section and a outlet section. The inlet section includes a first high-purity inert gas inlet (3). The inlet section and the roasting section are connected by a feed section. The first high-purity inert gas inlet (3), the feed section and the heater (2) are connected in sequence. The rear air intake section includes a second high-purity inert gas inlet (4) and a high-purity chlorine gas inlet (5). A gas distribution section is connected between the roasting section and the rear air intake section. The heater (2), the gas distribution section and the rear air intake section are connected in sequence.

3. The high-purity quartz sand anaerobic chlorination roasting equipment according to claim 2, characterized in that, It also includes a front baffle (6), a first rear baffle (7) and a second rear baffle (8). The front baffle (6), the first rear baffle (7) and the second rear baffle (8) are all one-way valve structures. The front baffle (6) provides one-way airflow to the inlet section and the material passage section, and the first rear baffle (7) and the second rear baffle (8) provide one-way airflow to the rear inlet section and the air distribution section.

4. The high-purity quartz sand anaerobic chlorination roasting equipment according to claim 3, characterized in that, The material passage section includes a feed hopper (9) and a feeder (10) connected to the feed hopper (9). The feeder (10) is connected to the first high-purity inert gas inlet (3) and forms a gas self-circulation passage.

5. A high purity quartz sand oxygen-free chloridizing roasting apparatus according to claim 4, characterized in that, The gas splitting section includes a gas splitter (11), which is connected to the second high-purity inert gas inlet (4) and the high-purity chlorine gas inlet (5) for gas splitting processing.

6. A high purity quartz sand non-oxygen chlorination roasting apparatus according to claim 5, wherein It also includes a hopper cover (12), which is located inside the feed hopper (9) and the feeder (10) and controls the feed switch.

7. The high-purity quartz sand anaerobic chlorination roasting equipment according to claim 6, characterized in that, It also includes a sealing cap, which includes a front sealing cap (13) and a rear sealing cap (14). The front sealing cap (13) is located between the material passage section and the roasting section and is used for the switching control of the material passage section and the roasting section. The rear sealing cap (14) is located between the gas distribution section and the roasting section and is used for the switching control of the gas distribution section and the roasting section.

8. The high-purity quartz sand anaerobic chlorination roasting equipment according to claim 7, characterized in that, It also includes an exhaust gas collector (15) for collecting exhaust gas input from the roasting section to the intake section.

Images