Chlorination roasting device for quartz sand purification

Abstract

The utility model provides a chloridizing roasting device for quartz sand purification, which relates to the technical field of quartz sand purification and comprises a mixing bin, a heating bin, a temperature control operation table, a tail gas absorption device, a tail gas treatment pond and a transmission device. The mixing bin is provided with two feeding ports which are used for feeding quartz sand and a solid chlorinating agent respectively, and a connecting pipe with the inclination angle larger than or equal to 30 degrees is arranged at the bottom of the mixing bin. And the heating bin is connected with the mixing bin through a connecting pipe. The temperature of the heating bin is controlled through a temperature control operation table, an alundum tube is arranged in the heating bin, the inner wall of the alundum tube is spiral, the alundum tube is driven by a motor to rotate, and uniform heating and continuous conveying of quartz sand are achieved. The tail gas absorption device is connected with the heating bin and is connected with the tail gas treatment tank through a gas conveying pipe, and the tail gas treatment tank consists of a plurality of continuous reaction tanks and is used for purifying tail gas. According to the utility model, the potential safety hazard in the transportation, storage and use processes of the gas chlorinating agent is solved, and the purification efficiency and the product quality of quartz sand are obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of quartz sand purification, in particular to a chlorination roasting device used for purifying high-purity quartz sand. Background Art

[0002] Chlorination roasting, as a common mineral smelting method, has been successfully applied in the selection and smelting of metal minerals. With the deepening of mineral processing technology, it has begun to develop in the direction of non-metallic mineral processing. In the purification of high-purity quartz sand, the chlorination roasting process can effectively reduce the content of impurities such as Al, alkali metal elements, and alkaline earth metal elements in quartz sand. With the increasing requirements for the purity of high-purity quartz sand in the field of high-tech, the development of chlorination roasting technology is particularly important. Traditional chlorination roasting methods mainly use gaseous chlorinating agents such as chlorine (Cl2) and hydrogen chloride (HCl), but these gases are toxic and there are high risks in handling and storage. In addition, gaseous chlorinating agents have high requirements for equipment and sites and are expensive. At temperatures below 1500°C, chlorine cannot react directly with metal oxides, and a carbonaceous reducing agent needs to be added for reaction, which makes the process complicated and difficult to remove impurities of special crystalline alumina.

[0003] The traditional gaseous chlorination process faces the following technical problems in industrial applications: gaseous chlorination agents are toxic and there is a risk of leakage during the treatment process, threatening the environment and the safety of operators; the reaction needs to be carried out at high temperatures, the process is complicated, impurities are not completely removed, the cost of industrial application is high, production is not continuous, efficiency is low, and quality is unstable. Utility Model Content

[0004] In order to overcome the above technical problems, the utility model proposes a chlorination roasting device for quartz sand purification suitable for solid chlorinating agent. The specific technical scheme is as follows:

[0005] A chlorination roasting device for quartz sand purification, which consists of a mixing bin, a heating bin, a temperature control operating table, a tail gas absorption device, a tail gas treatment pool and a transmission device; the mixing bin is provided with two feed ports, namely a quartz sand feed port and a solid chlorinating agent feed port, and the bottom outlet of the mixing bin is connected with a connecting pipe, which is an inclined cavity with an inclination angle of ≥30°;

[0006] The heating bin is arranged downstream of the mixing bin and connected to the mixing bin through a connecting pipe. The temperature of the heating bin is controlled by a temperature control operating table. A corundum tube is arranged in the heating bin. Both ends of the corundum tube extend outside the bin. One end of the corundum tube close to the mixing bin is rotatably sealed and connected to the connecting pipe.

[0007] The inner wall of the corundum tube is designed to be spiral-shaped to form a shaftless spiral conveying structure;

[0008] A motor is fixed on the upper part of the heating chamber, and the output shaft of the motor is connected to one end of the corundum tube in a transmission manner to ensure the rotation of the corundum tube when the heating chamber is working, so as to achieve uniform heating and transportation of the quartz sand in the corundum tube;

[0009] The downstream of the heating chamber is connected to the tail gas absorption device, and a gas pipeline is provided on the side of the tail gas absorption device, and the other end of the gas pipeline is inserted into the bottom of the tail gas treatment pool.

[0010] The tail gas absorption device is placed obliquely, and the tail is connected with a discharge port, and a transmission device is provided below the discharge port for conveying the quartz sand ore after chlorination roasting;

[0011] The gas transmission pipeline is connected with the tail gas absorption device and the tail gas treatment pool.

[0012] Furthermore, the connecting tube may be made of a high-purity quartz tube with a SiO2 content ≥ 99.9% or a high-purity silicon carbide tube with a purity greater than 98.5%.

[0013] Furthermore, both ends of the corundum tube are connected to the edges of the heating chamber through bearings.

[0014] Furthermore, the interior of the heating chamber is a hollow structure, and 4 to 8 silicon-molybdenum rods are installed inside to heat the corundum tube.

[0015] Furthermore, the tail gas treatment pool is composed of a plurality of continuous reaction pools, the reaction pools are provided with a sealable cover plate, the cover plate is provided with an exhaust pipe, and the purified gas is discharged through the exhaust pipe.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] The utility model uses a mixing bin to fully mix the solid chlorinating agent with high-purity quartz sand, thereby solving the hidden leakage risk during the transportation, storage and production of bottled chlorine and hydrogen chloride gas, and reducing the harm to people and the environment.

[0018] In the utility model, the heating chamber adopts silicon molybdenum rod electrode heating, the corundum tube is placed in the chamber and extends to the outside of the chamber, and the two ends are sealed and equipped with bearings. Compared with the heating coil wrapped on the quartz glass tube, microwave heating and other methods, the heating temperature is higher and easier to control. A motor is fixed on the upper part of the heating chamber, and the output shaft of the motor is connected to one end of the corundum tube in a transmission manner to ensure that the corundum tube rotates during the heating process, thereby realizing uniform heating and transportation of quartz sand during chlorination roasting.

[0019] The inner wall of the corundum tube is set to a spiral structure. The shaftless spiral conveying effect generated when the corundum tube rotates is used to make the quartz sand evenly heated while achieving continuous conveying of the quartz sand, ensuring full contact between the solid chlorinating agent and the quartz sand, improving the purification efficiency, and solving the problem of unstable quality.

[0020] The tail gas absorption device is connected to the tail gas treatment pool through an exhaust pipe. The tail gas treatment pool can be designed with multi-stage purification according to the type of chlorinating agent, thus achieving environmental friendliness.

[0021] In summary, the utility model provides an efficient, safe and environmentally friendly chlorination roasting device for quartz sand purification, which overcomes many shortcomings of the prior art and has important industrial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a connection diagram of the system in the embodiment of the utility model;

[0023] Figure 2 It is an axonometric view of the mixing bin in the embodiment of the utility model;

[0024] Figure 3 This is an isometric view of a heating chamber in an embodiment of the utility model;

[0025] Figure 4 yes Figure 3 Left view of the middle heating chamber;

[0026] Figure 5 It is a half-section view of the interior of the heating chamber in the embodiment of the utility model.

[0027] The figure numbers include: 1. mixing bin; 11. quartz sand feed port; 12. solid chlorination agent feed port; 13. connecting pipe; 2. heating bin; 21. temperature control operating table; 22. corundum tube; 23. motor; 24. bearing; 25. transmission belt; 26. silicon-molybdenum rod; 3. exhaust gas absorption device; 31. gas transmission pipe; 32. discharge port; 4. exhaust gas treatment tank; 41. reaction tank; 42. cover plate; 43. exhaust pipe; 5. transmission device. DETAILED DESCRIPTION

[0028] Hereinafter, the technology in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0029] Reference Figure 1 The device includes a mixing bin 1, a connecting pipe 13, a heating bin 2, a temperature control operation table 21, an exhaust gas absorption device 3, an exhaust gas treatment pool 4 and a transmission device 5. Through the reasonable configuration of each component, efficient purification of quartz sand is achieved.

[0030] The mixing bin 1 is provided with two feed ports, namely, a quartz sand feed port 11 and a solid chlorinating agent feed port 12. Quartz sand and solid chlorinating agent enter the mixing bin 1 through their respective feed ports. A connecting pipe 13 is connected to the bottom outlet of the mixing bin 1. The connecting pipe 13 is an inclined cavity with an inclination angle of ≥30°, which is conducive to conveying the mixed material to the heating bin 2. Three sets of impellers are provided in the mixing bin 1, which are driven by a transmission motor connected to a drive shaft to ensure sufficient mixing of the quartz sand and the solid chlorinating agent.

[0031] The heating bin 2 is arranged downstream of the mixing bin 1 and connected to the mixing bin 1 through the connecting pipe 13. The temperature of the heating bin 2 is controlled by the temperature control operation table 21. A corundum tube 22 is installed inside the heating bin 2. Both ends of the corundum tube 22 extend outside the bin. One end of the corundum tube 22 close to the mixing bin 1 is connected to the connecting pipe 13 for rotation and sealing. A motor 23 is fixed on the upper part of the heating bin 2. The output shaft of the motor 23 is connected to one end of the corundum tube 22 through a transmission belt 25 to ensure the rotation of the corundum tube 22 when the heating bin 2 is working. The inner wall of the corundum tube 22 is set to a spiral shape to form a shaftless spiral conveying structure to ensure that the material continues to move forward during the heating process. The rotation of the corundum tube 22 enables the quartz sand to be heated evenly and continuously conveyed.

[0032] The downstream of the heating bin 2 is connected to the tail gas absorption device 3, which is rotatably sealed and connected to the end of the corundum tube 22 away from the mixing bin 1. A gas delivery pipe 31 is provided on the side of the tail gas absorption device 3, and the other end of the gas delivery pipe 31 is inserted into the bottom of the tail gas treatment tank 4. The tail of the tail gas absorption device 3 is sealed and connected to a discharge port 32, and a transmission device 5 is provided below the discharge port 32 for conveying quartz sand concentrate after chlorination roasting. The tail gas treatment tank 4 is composed of a plurality of continuous reaction tanks 41, and a sealable cover plate 42 is provided on the reaction tank 41, and an exhaust pipe 43 is provided on the cover plate 42, and the purified gas is discharged through the exhaust pipe 43.

[0033] Preferably, the connecting tube 13 is a high-purity quartz tube (SiO2 content ≥ 99.9%) or a high-purity silicon carbide tube (purity > 98.5%) to ensure high temperature resistance and prevent the introduction of impurities.

[0034] Preferably, both ends of the corundum tube 22 are connected to the edges of the heating chamber 2 through bearings 24 to ensure the stability of its rotation.

[0035] Preferably, the interior of the heating chamber 2 is a hollow structure, and 4 to 8 silicon-molybdenum rods 26 are installed inside along the circumference of the corundum tube 22 to efficiently heat the corundum tube 22 and ensure a stable high-temperature environment so that the chlorinating agent and the high-purity quartz sand can fully react.

[0036] The working principle of this embodiment is as follows:

[0037] Quartz sand and solid chlorinating agent enter the mixing bin 1 through the quartz sand feed port 11 and the solid chlorinating agent feed port 12 respectively, and after being fully stirred and mixed by the impeller, enter the corundum tube 22 in the heating bin 2 through the inclined connecting pipe 13. The temperature is controlled by the temperature control operation table 21, and the motor 23 drives the corundum tube 22 to rotate. The spiral structure in the corundum tube 22 pushes the quartz sand to move forward continuously during the rotation process, and at the same time receives uniform high-temperature heating to achieve the chlorination roasting reaction.

[0038] When the chlorination roasting is completed, the quartz sand enters the tail gas absorption device 3 through the tail end of the corundum tube 22, and the tail gas generated by the chlorination reaction enters the tail gas treatment pool 4 through the gas pipe 31. The multi-stage reaction pool performs purification treatment, and the purified gas is discharged through the exhaust pipe 43. It should be noted that when the present embodiment is in operation, the tail gas is only generated in the heating bin 2. When the corundum tube 22 rotates rapidly, a potential energy difference is generated at both ends thereof, and the tail gas is transmitted to the tail gas absorption device 3 and enters the tail gas treatment pool 4 through the gas pipe 31, and the tail gas is then quickly absorbed.

Claims

1. A chlorination roasting device for quartz sand purification, characterized in that: It includes a mixing bin, a heating bin, a temperature control operating table, an exhaust gas absorption device, an exhaust gas treatment pool and a transmission device; the mixing bin is provided with two feed ports, namely a quartz sand feed port and a solid chlorinating agent feed port, and the bottom outlet of the mixing bin is connected with a connecting pipe, and the connecting pipe is an inclined cavity with an inclination angle of ≥30°; The heating bin is arranged downstream of the mixing bin and connected to the mixing bin through a connecting pipe. The heating bin is provided with a temperature control operating table. A corundum tube is arranged in the heating bin. Both ends of the corundum tube extend outside the bin. One end of the corundum tube close to the mixing bin is rotatably sealed and connected to the connecting pipe. The inner wall of the corundum tube is provided with a spiral structure. A motor is fixedly installed on the upper part of the heating bin, and the output shaft of the motor is drivingly connected to one end of the corundum tube. The tail gas absorption device is arranged downstream of the heating bin and is rotatably sealed and connected to one end of the corundum tube away from the mixing bin. An air supply pipe is provided on the side of the tail gas absorption device, and the other end of the air supply pipe is inserted into the bottom of the tail gas treatment tank. The tail gas absorption device is placed obliquely, and the tail is sealed and connected to a discharge port, and a transmission device is provided below the discharge port.

2. A chlorination roasting device for purifying quartz sand according to claim 1, characterized in that: The connecting tube is made of any one of a high-purity quartz tube with a SiO2 content of ≥99.9% or a high-purity silicon carbide tube with a purity greater than 98.5%.

3. A chlorination roasting device for purifying quartz sand according to claim 1, characterized in that: The two ends of the corundum tube are respectively connected to the edges of the heating chamber through bearings.

4. A chlorination roasting device for purifying quartz sand according to claim 1, characterized in that: The interior of the heating chamber is a hollow structure, and 4 to 8 silicon-molybdenum rods are installed inside, and the silicon-molybdenum rods are distributed along the circumference of the corundum tube.

5. A chlorination roasting device for purifying quartz sand according to claim 1, characterized in that: The tail gas treatment pool is composed of a plurality of continuous reaction pools, and a cover plate is sealed on the reaction pool, and an exhaust pipe is arranged on the cover plate.

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