Device for extracting lithium by roasting lepidolite sulfate

Abstract

The utility model discloses a device for extracting lithium by roasting lepidolite sulfate, and relates to the technical field of extracting lithium from lepidolite. The roasting device comprises a top cover, a roasting device body, a sealing adsorption plate and an air pump, a limiting frame is fixedly welded to the bottom of the inner side of the roasting device body, an electromagnet is fixedly clamped to the top of the limiting frame, the top cover is fixedly clamped to the top of the roasting device body, and the sealing adsorption plate is slidably clamped to the inner side of the roasting device body; and an air pump is arranged on one side of the peripheral face of the roasting device body, and a filtering assembly is arranged at the top of the air pump. Through the arrangement of the top cover, the roasting device main body, the sealing adsorption plate and the air pump, the problems that a large amount of heat is lost due to direct treatment and exhaust of waste gas of a device for extracting lithium by roasting lepidolite sulfate, and the production cost is greatly increased due to circular treatment of the waste gas are solved; and the heating time of the device on the raw materials is often longer than the actually required time.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium extraction from lepidolite, and particularly relates to a device for extracting lithium by roasting lepidolite sulfate. Background Art

[0002] Lepidolite is the most common lithium mineral and an important mineral for extracting lithium. The existing lithium extraction processes of lepidolite mainly include sulfuric acid method, sulfate roasting method, limestone method, chlorination roasting method, pressure cooking method, alkali dissolution method, etc. Among them, the sulfate roasting method of lepidolite mainly involves mixing lepidolite with sulfates such as potassium sulfate, sodium sulfate or calcium sulfate and then roasting it at high temperature. The principle is high-temperature ion replacement, that is, using high temperature to destroy the mineral structure of lepidolite, making the lithium ore structure loose, and the sodium, potassium, etc. in the sulfate react with the aluminum and silicon in the lepidolite. The lithium ions near the acid salt nucleus undergo a high-temperature replacement reaction to replace lithium and transform it into soluble lithium sulfate, which is then leached with water or dilute acid and filtered to extract lithium. This method is suitable for processing various lithium ores. During separation, the aluminum in the minerals is hardly replaced. The leaching rate is high and the process is simple, so it is widely used. When extracting lithium through the lithium mica sulfate roasting method, it is usually necessary to use a kiln or other device to heat the raw materials such as lithium mica and sulfate at high temperature, but it still has the following disadvantages in actual use:

[0003] During the operation of lithium extraction method by roasting lithium mica sulfate, a large amount of fluorine and sulfide waste gas volatilization is often generated. In order to avoid environmental pollution caused by waste, the device for lithium extraction by roasting is usually equipped with a waste gas treatment structure to treat the waste gas generated. However, during the waste gas treatment process, the waste gas often contains a large amount of heat. Direct treatment and discharge of the waste gas will cause a large amount of heat loss. Although continuous recycling of the waste gas can reduce the heat loss, it greatly increases the production expenses.

[0004] When processing raw materials such as lepidolite and sulfate, the device for extracting lithium by roasting lepidolite sulfate often heats the raw materials at a fixed time to ensure that the raw materials can fully react. However, in actual use, it is often difficult to control the heating time. In order to avoid insufficient reaction, the heating time is often longer than the actual required time, reducing production efficiency. Utility Model Content

[0005] The utility model aims to provide a device for extracting lithium by roasting lithium mica sulfate. Through a top cover, a roasting device body, a sealed adsorption plate and an air pump, the utility model solves the problem that the device for extracting lithium by roasting lithium mica sulfate needs to filter the waste gas, but directly treating and discharging the waste gas will lead to a large loss of heat, and circulating the waste gas greatly increases production expenses, and the heating time of the device for raw materials is often longer than the actually required time.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] The utility model discloses a device for extracting lithium by roasting lithium mica sulfate, comprising a top cover, a roasting device body, a sealing adsorption plate and an air pump, wherein a limiting frame is welded and fixed at the bottom of the inner side of the roasting device body, an electromagnet is clamped and fixed at the top of the limiting frame, and a pressure sensor is arranged in the limiting frame. When the sealing adsorption plate moves downward and touches the electromagnet on the limiting frame, the pressure sensor monitors the pressure and controls the device to energize the electromagnet, so that the electromagnet adsorbs and fixes the sealing adsorption plate, so as to facilitate the smooth discharge of the processed raw materials. The top of the roasting device body is clamped and fixed, the sealing adsorption plate is slidably clamped at the inner side of the roasting device body, and an extrusion spring is clamped at the bottom of the sealing adsorption plate. When the raw materials are fed, the raw materials are poured into the inner side of the roasting device body through the top cover, and the raw materials squeeze the sealing adsorption plate and the extrusion spring to make them move downward for a certain distance. After the rated amount of raw materials is poured in, the raw materials are heated by the roasting device body. The waste gas generated during the reaction of the materials increases the air pressure on the sealed adsorption plate in the main body of the roasting device, and the sealed adsorption plate is squeezed by the air pressure to avoid safety hazards caused by excessive air pressure. After sufficient reaction and generation of a certain amount of gas, the sealed adsorption plate is attached to the upper side of the electromagnet to start discharging the materials, thereby avoiding the extension of the heating time and improving production efficiency. A stirring blade is arranged on the top of the sealed adsorption plate, and the raw materials can be stirred by the stirring blade to make the raw materials fully react with each other and improve the reaction efficiency. An air pump is arranged on one side of the outer peripheral surface of the main body of the roasting device, and a filter assembly is arranged on the top of the air pump. A sufficient amount of waste gas can be stored through the main body of the roasting device until the reaction of the raw materials is completed. When the reaction of the raw materials is completed and the materials are discharged, the waste gas in the raw materials can be quickly extracted by the air pump and processed by the filter assembly. The remaining gas is pumped back to the inside of the main body of the roasting device, thereby reducing heat loss and avoiding the continuous circulation of waste gas, which leads to increased production expenses.

[0008] Furthermore, a first electromagnetic valve is inserted through the top of the top cover, a hopper is fixedly inserted through the top of the first electromagnetic valve, and the hopper is connected to the main body of the roasting device through the first electromagnetic valve;

[0009] The hopper can facilitate the feeding of a large amount of raw materials, and the first solenoid valve can close the hopper when the raw materials are heated to avoid exhaust gas from being discharged through the hopper and ensure the normal increase of air pressure in the main body of the roasting device.

[0010] Furthermore, a support frame is welded and fixed to the bottom of the main body of the roasting device, a reflux pipe is welded through the top of the outer peripheral surface of the main body of the roasting device, and a one-way valve is clamped through the outer peripheral surface of the reflux pipe;

[0011] The treated waste gas and heat can be refluxed through the reflux pipe to avoid a large amount of heat loss and reduce production expenses. The one-way valve can prevent the waste gas from being discharged through the reflux pipe and affecting the normal increase of air pressure in the main body of the roasting device.

[0012] Furthermore, a discharge pipe is welded through the outer peripheral surface of the main body of the roasting device, a connecting pipe is welded through the other end of the discharge pipe, a second solenoid valve is clamped through the outer peripheral surface of the discharge pipe, and the discharge pipe is located between the electromagnet and the reflux pipe;

[0013] After the raw materials are heated, they can be discharged by opening the second solenoid valve. During the raw material discharging process, the raw materials fall through the bottom of the connecting pipe under the action of gravity, while the exhaust gas is processed and refluxed through the top of the connecting pipe. The sealing adsorption plate can be adsorbed and fixed by the electromagnet to ensure the stability of the sealing adsorption plate when the raw materials are discharged.

[0014] Furthermore, a stirring motor is clamped at the center of the bottom of the sealed adsorption plate, a rotating rod is clamped at the top of the stirring motor, the rotating rod is inserted through the top of the sealed adsorption plate, the stirring blade is welded and fixed to the outer peripheral surface of the rotating rod, a limiting rod is welded and fixed to the bottom of the sealed adsorption plate, the limiting rod is inserted through the bottom of the roasting device body, and the other end of the extrusion spring relative to the sealed adsorption plate is clamped at the bottom of the roasting device body;

[0015] The stirring motor can drive the stirring blade to rotate and stir the raw materials, so that various raw materials can fully react with each other, thereby improving production efficiency. When the raw materials are heated, the waste gas generated by the raw material reaction will increase the air pressure in the main body of the roasting device, and further squeeze the sealing adsorption plate and the extrusion spring to move the sealing adsorption plate downward, increasing the space to reduce the air pressure in the main body of the roasting device. When a certain amount of raw materials reacts fully and produces a certain amount of waste gas, the air pressure squeezes the sealing adsorption plate to fit the upper side of the electromagnet, and the material is discharged. There is no need to extend the heating time to ensure the full reaction of the raw materials, thereby improving production efficiency.

[0016] Furthermore, the air pump is clamped on the top of the connecting pipe, the outer peripheral surface of the air pump is penetrated and clamped with a heat preservation pipe, the other end of the heat preservation pipe is clamped on one side of the filter assembly, one end of the filter assembly is plugged with a filter element, and the other side of the filter assembly is penetrated and clamped on one end of the return pipe;

[0017] When discharging raw materials, the exhaust gas can be quickly pumped from the connecting pipe to the insulation pipe through the air pump, and then filtered through the filter assembly, and finally returned to the main body of the roasting device through the reflux pipe, thereby avoiding heat loss, reducing the use time of the air pump, and reducing expenses. At the same time, the flow of exhaust gas can accelerate the discharge of raw materials and improve production efficiency.

[0018] The utility model has the following beneficial effects:

[0019] The utility model solves the problem that a method for extracting lithium by roasting lithium mica sulfate often generates a large amount of fluorine and sulfide waste gas volatilization during operation by arranging a roasting device main body, a sealed adsorption plate and an air pump. In order to avoid environmental pollution caused by waste, a device for extracting lithium by roasting is usually provided with a waste gas treatment structure to treat the generated waste gas. However, in the waste gas treatment process, the waste gas often contains a large amount of heat. Direct treatment and discharge of the waste gas will lead to a large amount of heat loss. Although continuous circulation treatment of the waste gas can reduce the heat loss, it greatly increases the problem of production expenses. When the raw materials are heated at high temperature, the waste gas generated by the reaction increases the air pressure in the main body of the roasting device, so that the sealed adsorption plate moves downward to accommodate all the waste gas generated by the reaction. When the raw materials are discharged, the waste gas is evacuated by the air pump and treated by the filter component, so as to avoid a large amount of heat loss, reduce the use time of the air pump and reduce expenses.

[0020] The utility model solves the problem that, when a device for extracting lithium by roasting lithium mica sulfate and lithium mica is processing raw materials such as lithium mica and sulfate, the raw materials are often heated at a fixed time to ensure that the raw materials can fully react, but it is often difficult to control the heating time in actual use. In order to avoid insufficient reaction, the heating time is often longer than the actual required time, thereby reducing the production efficiency. When the raw materials are heated at high temperature, the waste gas generated by the reaction of the raw materials will increase the air pressure in the main body of the roasting device, and the sealing adsorption plate and the extrusion spring are further squeezed to move the sealing adsorption plate downward, thereby increasing the space and reducing the air pressure in the main body of the roasting device. When a certain amount of raw materials reacts fully and generates a certain amount of waste gas, the air pressure squeezes the sealing adsorption plate to fit the upper side of the electromagnet to start discharging. The amount of waste gas that can be generated by a certain amount of raw materials is relatively fixed, and then the heating and discharging time is controlled by air pressure, the heating time is relatively accurate, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural effect diagram of the utility model;

[0023] Figure 3 This is a structural diagram of the top cover of the utility model;

[0024] Figure 4 It is a cutaway view of the main body of the roasting device of the utility model;

[0025] Figure 5 This is a structural diagram of the sealing adsorption plate of the utility model;

[0026] Figure 6This is a bottom view of the sealing adsorption plate of the utility model;

[0027] Figure 7 It is the structural diagram of the air pump of the utility model.

[0028] Reference numerals:

[0029] 1. Top cover; 101. Hopper; 102. First solenoid valve; 2. Roasting device body; 201. Discharge pipe; 202. Reflux pipe; 203. Second solenoid valve; 204. One-way valve; 205. Connecting pipe; 206. Limiting frame; 207. Electromagnet; 208. Support frame; 3. Sealing adsorption plate; 301. Rotating rod; 302. Extrusion spring; 303. Stirring blade; 304. Limiting rod; 305. Stirring motor; 4. Air pump; 401. Filter assembly; 402. Insulation pipe; 403. Filter element. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] See also Figure 1-7As shown, the utility model is a device for extracting lithium by roasting lithium mica sulfate, including a top cover 1, a roasting device body 2, a sealed adsorption plate 3 and an air pump 4. A limit frame 206 is welded and fixed to the bottom of the inner side of the roasting device body 2, and an electromagnet 207 is fixed to the top of the limit frame 206. A pressure sensor is arranged in the limit frame 206. When the sealed adsorption plate 3 moves downward and touches the electromagnet 207 on the limit frame 206, until the pressure sensor monitors the rated air pressure and the control device energizes the electromagnet 207, the electromagnet 207 adsorbs and fixes the sealed adsorption plate 3, so that the processed raw materials can be discharged smoothly. The top of the roasting device body 2 is fixed with a top cover 1, and the inner side of the roasting device body 2 is slidably clamped with the sealed adsorption plate 3, and the bottom of the sealed adsorption plate 3 is clamped with an extrusion spring 302. When the raw materials are fed, the raw materials are poured into the inner side of the roasting device body 2 through the top cover 1, and the raw materials squeeze the sealed adsorption plate 3 and the extrusion spring 302. Move downward for a distance. After the rated amount of raw materials is poured in, the raw materials are heated by the roasting device main body 2. The exhaust gas generated during the reaction of the raw materials increases the air pressure on the sealed adsorption plate 3 in the roasting device main body 2, and the sealed adsorption plate 3 is squeezed by the air pressure to move downward, thereby increasing the space to reduce the air pressure. After the raw materials fully react and produce a certain amount of gas, the sealed adsorption plate 3 is adsorbed on the upper side of the electromagnet 207 and begins to discharge. A stirring blade 303 is provided on the top of the sealed adsorption plate 3. The raw materials are stirred by the rotation of the stirring blade 303 to ensure that the raw materials fully react with each other. An air pump 4 is provided on one side of the outer peripheral surface of the roasting device main body 2, and a filter component 401 is provided on the top of the air pump 4. A sufficient amount of exhaust gas is stored by the roasting device main body 2 until the reaction of the raw materials is completed. When the reaction of the raw materials is completed and the materials are discharged, the exhaust gas in the raw materials is quickly extracted by the air pump 4 and processed by the filter component 401, and the remaining gas is pumped back to the inner side of the roasting device main body 2.

[0032] Among them Figure 1-4 As shown, a first solenoid valve 102 is inserted through the top of the top cover 1, a hopper 101 is fixedly inserted through the top of the first solenoid valve 102, the hopper 101 is connected to the roasting device body 2 through the first solenoid valve 102, a support frame 208 is welded and fixed to the bottom of the roasting device body 2, a reflux pipe 202 is inserted through the top of the outer peripheral surface of the roasting device body 2, a one-way valve 204 is inserted through the outer peripheral surface of the reflux pipe 202, a discharge pipe 201 is inserted through the outer peripheral surface of the roasting device body 2, a connecting pipe 205 is inserted through the other end of the discharge pipe 201, a second solenoid valve 203 is inserted through the outer peripheral surface of the discharge pipe 201, and the discharge pipe 201 is located between the electromagnet 207 and the reflux pipe 202;

[0033] A certain amount of raw materials are poured into the roasting device body 2 through the hopper 101 and the first solenoid valve 102 and the second solenoid valve 203 are closed. After the sealing adsorption plate 3 is attached to the upper side of the electromagnet 207 and is adsorbed and fixed by the electromagnet 207, the second solenoid valve 203 is opened to allow the raw materials to be discharged through the discharge pipe 201, and the exhaust gas treated by the filter component 401 is further refluxed into the roasting device body 2 through the reflux pipe 202.

[0034] Among them Figure 1 , 2 As shown in , 5 and 6, a stirring motor 305 is clamped at the center of the bottom of the sealed adsorption plate 3, a rotating rod 301 is clamped at the top of the stirring motor 305, the rotating rod 301 penetrates and is inserted into the top of the sealed adsorption plate 3, the stirring blade 303 is welded and fixed to the outer circumferential surface of the rotating rod 301, a limiting rod 304 is welded and fixed to the bottom of the sealed adsorption plate 3, the limiting rod 304 penetrates and is inserted into the bottom of the roasting device body 2, and the other end of the extrusion spring 302 is clamped to the bottom of the roasting device body 2 relative to the sealed adsorption plate 3;

[0035] After feeding, the raw materials fall to the upper side of the sealed adsorption plate 3, and the extrusion spring 302 is squeezed to make it and the sealed adsorption plate 3 move downward a certain distance. During the heating process, the stirring motor 305 drives the rotating rod 301 to rotate, and further drives the stirring blade 303 to rotate to stir the raw materials, so that the various raw materials can fully react with each other. The waste gas generated by the raw material reaction increases the air pressure in the roasting device body 2, and further squeezes the sealed adsorption plate 3 and the extrusion spring 302 to move the sealed adsorption plate 3 downward, increasing the space to reduce the air pressure in the roasting device body 2. When a certain amount of raw materials reacts fully and generates a certain amount of waste gas, the air pressure squeezes the sealed adsorption plate 3 to fit the upper side of the electromagnet 207, and starts to discharge.

[0036] Among them Figure 1 , 2 As shown in , 7, the air pump 4 is clamped on the top of the connecting pipe 205, the outer peripheral surface of the air pump 4 is penetrated and clamped with a heat preservation pipe 402, the other end of the heat preservation pipe 402 is clamped on one side of the filter component 401, one end of the filter component 401 is plugged with a filter element 403, and the other side of the filter component 401 is penetrated and clamped on one end of the return pipe 202;

[0037] When the raw materials are discharged, the exhaust gas is quickly pumped from the connecting pipe 205 into the insulation pipe 402 through the air pump 4, and then filtered through the filter assembly 401 and the filter element 403. The high-temperature gas finally flows back into the roasting device body 2 through the reflux pipe 202.

[0038] The specific working principle of the utility model is as follows: the filter element 403 is plugged into the filter assembly 401, a certain amount of raw materials are poured into the roasting device body 2 through the hopper 101, and the first solenoid valve 102 and the second solenoid valve 203 are closed, the raw materials fall to the upper side of the sealing adsorption plate 3, and the extrusion spring 302 is squeezed to make it and the sealing adsorption plate 3 move downward a certain distance. During the heating process, the rotation of the rotating rod 301 is driven by the stirring motor 305, and the stirring blade 303 is further driven to rotate to stir the raw materials, so that the various raw materials are fully reacted. The exhaust gas generated by the raw material reaction increases the air pressure in the roasting device body 2, and further squeezes the sealing adsorption plate 3 and the extrusion spring 302. The sealing adsorption plate 3 is moved downward to increase the space to reduce the air pressure in the roasting device body 2. When a certain amount of raw materials react fully and produce a certain amount of waste gas, the sealing adsorption plate 3 happens to fit the upper side of the electromagnet 207. The electromagnet 207 is energized to adsorb and fix the sealing adsorption plate 3. The second solenoid valve 203 is opened and the air pump 4 is started. The waste gas is quickly pumped from the connecting pipe 205 to the insulation pipe 402 through the air pump 4, and then filtered through the filter assembly 401 and the filter element 403. The high-temperature gas finally flows back into the roasting device body 2 through the reflux pipe 202. After the discharge is completed, the electromagnet 207 is powered off to reset the sealing adsorption plate 3 under the action of the extrusion spring 302.

[0039] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A device for extracting lithium by roasting lepidolite sulfate, comprising a top cover (1), a roasting device body (2), a sealing adsorption plate (3) and an air pump (4), characterized in that: A limiting frame (206) is welded and fixed to the bottom of the inner side of the roasting device body (2), an electromagnet (207) is clamped and fixed to the top of the limiting frame (206), a top cover (1) is clamped and fixed to the top of the roasting device body (2), a sealing adsorption plate (3) is slidably clamped to the inner side of the roasting device body (2), a pressing spring (302) is clamped to the bottom of the sealing adsorption plate (3), a stirring blade (303) is arranged on the top of the sealing adsorption plate (3), an air pump (4) is arranged on one side of the outer peripheral surface of the roasting device body (2), and a filter assembly (401) is arranged on the top of the air pump (4).

2. The device for extracting lithium by roasting lepidolite sulfate according to claim 1, characterized in that: A first electromagnetic valve (102) is inserted through the top of the top cover (1) and is clamped and connected to the top of the first electromagnetic valve (102). A hopper (101) is clamped and fixed to the top of the first electromagnetic valve (102). The hopper (101) is connected through the first electromagnetic valve (102) and is connected to the inside of the roasting device body (2).

3. The device for extracting lithium by roasting lepidolite sulfate according to claim 1, characterized in that: A support frame (208) is welded and fixed to the bottom of the roasting device body (2), a return pipe (202) is welded through the top of the outer peripheral surface of the roasting device body (2), and a one-way valve (204) is clamped through the outer peripheral surface of the return pipe (202).

4. The device for extracting lithium by roasting lepidolite sulfate according to claim 3, characterized in that: A discharge pipe (201) is welded through the outer circumference of the roasting device body (2), a connecting pipe (205) is welded through the other end of the discharge pipe (201), a second electromagnetic valve (203) is clamped through the outer circumference of the discharge pipe (201), and the discharge pipe (201) is located between the electromagnet (207) and the reflux pipe (202).

5. The device for extracting lithium by roasting lepidolite sulfate according to claim 1, characterized in that: A stirring motor (305) is clamped at the center of the bottom of the sealing adsorption plate (3), a rotating rod (301) is clamped at the top of the stirring motor (305), the rotating rod (301) is inserted through the top of the sealing adsorption plate (3), the stirring blade (303) is welded and fixed to the outer peripheral surface of the rotating rod (301), a limiting rod (304) is welded and fixed to the bottom of the sealing adsorption plate (3), the limiting rod (304) is inserted through the bottom of the roasting device body (2), and the other end of the extrusion spring (302) relative to the sealing adsorption plate (3) is clamped to the inner bottom of the roasting device body (2).

6. The device for extracting lithium by roasting lepidolite sulfate according to claim 4, characterized in that: The air pump (4) is clamped on the top of the connecting pipe (205); a heat preservation pipe (402) is clamped through the outer peripheral surface of the air pump (4); the other end of the heat preservation pipe (402) is clamped on one side of the filter assembly (401); a filter element (403) is inserted into one end of the filter assembly (401); the other side of the filter assembly (401) is clamped through one end of the return pipe (202).

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