Low-loss manganese sulfate leaching system

Abstract

The utility model discloses a low-loss manganese sulfate leaching system which comprises a first feeding device for feeding manganese monoxide, a second feeding device for feeding mother liquor, a third feeding device for feeding sulfuric acid, a reaction device, an adjusting device for feeding calcium carbonate and a cleaning device for supplying clear water, the first feeding device comprises a feeding hopper, a conveying belt and a slurrying pool, the feeding hopper is connected with the conveying belt, and the discharging end of the conveying belt is connected with the slurrying pool; the slurrying tank is also connected with the second feeding device; the slurrying tank, the third feeding device, the adjusting device and the cleaning device are all connected with the reaction device, and the reaction device is a closed reaction container. The device can realize fine processing production of continuous pyrolusite leaching, the process is controllable, the manganese content of slag is reduced, the manganese leaching rate is effectively improved, and the device has a good application prospect.

Description

Technical Field

[0001] This utility model relates to the field of manganese sulfate production technology, specifically a low-loss manganese sulfate leaching system. Background Technology

[0002] Manganese sulfate is a crucial raw material for battery cathodes. Currently, conventional manganese sulfate leaching production systems involve grinding pyrolusite into powder, reducing the powder with carbon at high temperatures, and then leaching with concentrated sulfuric acid to obtain a high-concentration manganese sulfate coarse filtrate. This coarse filtrate is then purified and crystallized to produce high-purity battery-grade manganese sulfate material. However, this manganese sulfate leaching production system suffers from drawbacks such as excessive heat consumption, excessive consumption of acid and other auxiliary materials, excessive manganese carryover in the slag, inability to achieve continuous and refined processing, and uncontrollable process characteristics, resulting in low overall extraction rates and high costs. Therefore, this invention aims to develop a low-loss manganese sulfate leaching system to better achieve energy conservation, reduce consumption, and improve manganese leaching rates. Utility Model Content

[0003] The technical problem solved by this invention is to provide a low-loss manganese sulfate leaching system to overcome the shortcomings in the aforementioned background technology.

[0004] The technical problem solved by this utility model is achieved by the following technical solution:

[0005] A low-loss manganese sulfate leaching system includes a first feeding device for manganese monoxide, a second feeding device for mother liquor, a third feeding device for sulfuric acid, a reaction device, a regulating device for calcium carbonate, and a cleaning device for water supply.

[0006] The first feeding device includes a feeding hopper, a conveyor belt, and a pulping tank. The feeding hopper is connected to the conveyor belt, and the discharge end of the conveyor belt is connected to the pulping tank. The pulping tank is also connected to the second feeding device.

[0007] The pulping tank, the third feeding device, the regulating device, and the cleaning device are all connected to the reaction device, which is a closed reaction vessel.

[0008] The feed hopper is equipped with a feed control valve; the slurry tank, the third feed device, the regulating device, and the cleaning device are all connected to the reaction device through pipelines, and the pipelines are equipped with flow meters and electric regulating valves. The feed control valve, flow meters, and electric regulating valves are all electrically connected to the controller.

[0009] In this invention, the regulating device is a pH regulating device, which includes a calcium carbonate storage tank and a calcium carbonate slurry tank connected to the calcium carbonate storage tank. The calcium carbonate slurry tank is connected to the reaction device and the cleaning device through pipes.

[0010] In this invention, the connecting pipes of the third feeding device and the calcium carbonate slurry tank both extend into the interior of the reaction device, and each pipe end is equipped with a nozzle structure.

[0011] In this invention, stirring mechanisms are provided in the slurry tank, the second feeding device, the reaction device, and the calcium carbonate slurry tank.

[0012] In this invention, a liquid level sensor is installed in the slurry tank, and the liquid level sensor is connected to the controller.

[0013] In this invention, the reaction device is a closed reaction vessel, with a steam pipe and an exhaust pipe provided on the reaction vessel, and a one-way valve provided on the exhaust pipe.

[0014] In this invention, the reaction device is equipped with a pH sensor, a pressure sensor, and a temperature sensor, all of which are electrically connected to the controller.

[0015] In this invention, the reaction device is provided with an external heat insulation layer.

[0016] Beneficial effects: The low-loss manganese sulfate leaching system described in this utility model can realize the automatic and continuous processing of manganese sulfate leaching, reduce manual labor, improve production efficiency, ensure accurate and uniform feeding, reduce waste of auxiliary materials, achieve refined operation, reduce the manganese content of slag, and achieve a manganese leaching rate of up to 90%. Compared with the traditional process, the manganese leaching rate is increased by about 10%, which has good practical promotion and application value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the top structure of the reaction device in a preferred embodiment of the present invention.

[0019] The components include: 1. First feeding device; 11. Feed hopper; 12. Conveyor belt; 13. Slurry tank; 14. Stirring mechanism; 2. Second feeding device; 3. Third feeding device; 4. Reaction device; 41. Nozzle structure; 42. Steam pipe; 43. Exhaust pipe; 5. Adjustment device; 51. Calcium carbonate storage tank; 52. Calcium carbonate slurry tank; 6. Cleaning device. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0021] See Figures 1-2As shown, a low-loss manganese sulfate leaching system includes a first feeding device 1 for manganese monoxide feed, a second feeding device 2 for mother liquor feed (the mother liquor is manganese sulfate solution), a third feeding device 3 for sulfuric acid feed, a reaction device 4, a regulating device 5 for calcium carbonate feed, and a cleaning device 6 for water supply.

[0022] like Figure 1 The first feeding device 1 includes a feeding hopper 11, a conveyor belt 12, and a slurry tank 13. The feeding hopper 11 is connected to the conveyor belt 12, and the discharge end of the conveyor belt 12 is connected to the slurry tank 13. The slurry tank 13 is also connected to the second feeding device 2. The feeding hopper 11 is equipped with a feeding control valve, and both the slurry tank 13 and the second feeding device 2 are equipped with a stirring mechanism 14. Manganese monoxide powder is fed through the feeding hopper 11 and then conveyed to the slurry tank 13 through the conveyor belt 12. The manganese monoxide and the mother liquor react and are stirred simultaneously in the slurry tank 13.

[0023] In some preferred embodiments, a liquid level sensor is installed in the slurry tank 13, and the liquid level sensor is connected to a controller to achieve precise control of the liquid level in the slurry tank 13. In actual processing, by setting the feeding amounts of the first feeding device 1 and the second feeding device 2, automatic and uniform feeding and feeding can be achieved to react and provide a stable slurry for the next reaction.

[0024] The pulping tank 13, the third feeding device 3, the regulating device 5, and the cleaning device 6 are all connected to the reaction device 4, which is a closed reaction vessel.

[0025] The reaction apparatus 4 is a sealed reactor. The third feed device 3, the regulating device 5, and the cleaning device 6 are all connected to the reaction apparatus 4 via pipelines. Each pipeline is equipped with a flow meter and an electric regulating valve. The feed control valve, flow meter, and electric regulating valve are all electrically connected to the controller. Both the reaction apparatus 4 and the calcium carbonate slurry tank 52 are equipped with a stirring mechanism 14, which is used to promote a more complete and uniform reaction.

[0026] The slurry in the pulping tank 13 and the sulfuric acid from the third feeding device 3 react in the reaction device 4. The connecting pipe of the third feeding device 3 extends into the reaction device 4, and a nozzle structure 41 is provided at the end of the pipe. This nozzle structure 41 is an atomizing nozzle, which adds sulfuric acid by atomizing and spraying. Figure 2As shown, the reaction device 4 is a sealed reaction vessel with a steam pipe 42 and an exhaust pipe 43. A one-way valve is installed on the exhaust pipe 43, and an insulation layer is installed on the outside of the reaction vessel. The reaction device 4 is equipped with a pH sensor, a pressure sensor, and a temperature sensor. The pH sensor, pressure sensor, and temperature sensor are all electrically connected to the controller. During the reaction, the device is heated by steam, and the external insulation layer reduces heat loss. During the reaction, the temperature and pressure inside the reaction device 4 are controlled in real time by the temperature sensor and the pressure sensor. When the internal pressure is too high, the pressure is released through the exhaust pipe 43. When the reaction temperature is insufficient, the steam input is increased through the steam pipe 42, thereby ensuring the accuracy and safety of the reaction process.

[0027] In this invention, the adjusting device 5 is a pH adjusting device 5, which includes a calcium carbonate storage tank 51 and a calcium carbonate slurry tank 52 connected to the calcium carbonate storage tank 51. The calcium carbonate slurry tank 52 is connected to the reaction device 4 and the cleaning device 6 via pipes. Calcium carbonate in the calcium carbonate storage tank 51 is quantitatively discharged into the calcium carbonate slurry tank 52 and slurryed in the tank to obtain calcium carbonate slurry. After the slurry in the reaction device 4 reacts with sulfuric acid, the calcium carbonate slurry enters the reaction device 4 for pH adjustment and impurity removal. The connecting pipe of the calcium carbonate slurry tank 52 extends into the interior of the reaction device 4, and a nozzle structure 41 is also provided at the end of the pipe. The nozzle structure 41 is a hollow columnar nozzle. The calcium carbonate slurry enters the liquid in the reaction device 4 in a columnar manner to react. The pH sensor in the reaction device 4 monitors and determines whether the calcium carbonate slurry has been added sufficiently. The carbon dioxide gas generated in this step increases the pressure in the reaction vessel, which can also be released through the exhaust pipe 43. When the calcium carbonate slurry is added and the pH value of the liquid in the reaction vessel reaches the set value, the calcium carbonate slurry tank 52 stops adding material.

[0028] In this invention, the cleaning device 6 can provide water for the pulping tank 13 and the regulating device 5, and can also provide water for cleaning the pulping tank 13, the reaction device 4, the regulating device 5 and the pipeline.

[0029] The manganese sulfate leaching system described in this invention is applied to leaching manganese sulfate from pyrolusite slurry, and the manganese sulfate leaching rate can reach 90%, which is 10% higher than the traditional method, thus improving the automation and economic benefits of pyrolusite leaching.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., 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.

[0033] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

1. A low-loss manganese sulfate leaching system, characterized in that, It includes a first feeding device for manganese monoxide, a second feeding device for mother liquor, a third feeding device for sulfuric acid, a reaction device, a regulating device for calcium carbonate, and a cleaning device for water supply. The first feeding device includes a feeding hopper, a conveyor belt, and a pulping tank. The feeding hopper is connected to the conveyor belt, and the discharge end of the conveyor belt is connected to the pulping tank. The pulping tank is also connected to the second feeding device. The pulping tank, the third feeding device, the regulating device, and the cleaning device are all connected to the reaction device, which is a closed reaction vessel. The feed hopper is equipped with a feed control valve; the slurry tank, the third feed device, the regulating device, and the cleaning device are all connected to the reaction device through pipelines, and the pipelines are equipped with flow meters and electric regulating valves. The feed control valve, flow meters, and electric regulating valves are all electrically connected to the controller.

2. The low-loss manganese sulfate leaching system according to claim 1, characterized in that, The regulating device is a pH regulating device, which includes a calcium carbonate storage tank and a calcium carbonate slurry tank connected to the calcium carbonate storage tank. The calcium carbonate slurry tank is connected to the reaction device and the cleaning device through pipelines.

3. The low-loss manganese sulfate leaching system according to claim 2, characterized in that, The connecting pipes of the third feeding device and the calcium carbonate slurry tank both extend into the interior of the reaction device, and each pipe end is equipped with a nozzle structure.

4. The low-loss manganese sulfate leaching system according to claim 2, characterized in that, The slurry tank, the second feeding device, the reaction device, and the calcium carbonate slurry tank are all equipped with stirring mechanisms.

5. The low-loss manganese sulfate leaching system according to claim 1, characterized in that, A liquid level sensor is installed in the slurry tank and is connected to the controller.

6. The low-loss manganese sulfate leaching system according to claim 1, characterized in that, The reaction device is a closed reaction vessel, with a steam pipe and an exhaust pipe on the reaction vessel, and a one-way valve on the exhaust pipe.

7. The low-loss manganese sulfate leaching system according to claim 6, characterized in that, The reaction device is equipped with a pH sensor, a pressure sensor, and a temperature sensor, all of which are electrically connected to the controller.

8. The low-loss manganese sulfate leaching system according to claim 6, characterized in that, The reaction device is equipped with an external heat insulation layer.

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