CN217973362U

CN217973362U - Manganese sulfate leaching system

Info

Publication number: CN217973362U
Application number: CN202221858687.9U
Authority: CN
Inventors: 蔡鸿雁; 肖宏; 马成; 李林海; 肖地闻; 黄炎善; 赵思思; 陈凯琳
Original assignee: Guangxi Esokai New Material Technology Co ltd
Current assignee: Guangxi Esokai New Material Technology Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-12-06
Anticipated expiration: 2032-07-19

Abstract

The utility model relates to a manganese sulfate leaching system, including level four reation kettle and corresponding level four leaching device, wherein the first order reation kettle connects pyrolusite thick liquid inlet pipe, and the discharge gate of each grade reation kettle is connected with the feed inlet of the leaching device of the same level, and the discharge gate of the last level leaching device is connected with the feed inlet of the next level reation kettle, and the discharge gate of the fourth level leaching device obtains the leachate finished product; the fourth-stage reaction kettle is connected with a reducing gas inlet pipe, and a gas outlet of the next-stage reaction kettle is connected with a gas inlet of the previous-stage reaction kettle. The utility model discloses can effectively reduce the remaining of accessory substance manganese dithionate, make the reaction more abundant thoroughly to effectively improve the leaching rate, more accord with industrial production's needs.

Description

Manganese sulfate leaching system

Technical Field

The utility model relates to a manganese sulfate leaches production technical field, specifically is a manganese sulfate leaches system.

Background

Manganese sulfate is an important raw material of a battery anode material, at present, a production mode of manganese sulfate is to produce battery-grade manganese sulfate by electrolyzing manganese sheets, and the method has the advantages that the produced manganese sulfate product is high in purity and few in impurities, however, the manganese sheet price rises to bring large cost pressure to the production of manganese sulfate, and meanwhile, the energy consumption amount in the production process is large, and the production cost is high; in addition, manganese-containing mineral products such as pyrolusite and rhodochrosite are used as raw materials, then high-temperature reduction and sulfuric acid leaching are carried out to produce a manganese sulfate crude solution, and the manganese sulfate crude solution is purified and decontaminated to prepare battery-grade high-purity manganese sulfate.

Therefore, the utility model aims at developing a novel manganese sulfate leaching system to reduce the formation of impurity such as the in-process accessory substance that leaches manganese sulfate from pyrolusite, and improve the leaching rate, and more accord with the needs of industrial production processing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a manganese sulfate leaching system to solve the shortcoming in the above-mentioned background art.

The utility model discloses the technical problem who solves adopts following technical scheme to realize:

a manganese sulfate leaching system comprises four stages of reaction kettles and corresponding four stages of leaching devices, wherein the first stage of reaction kettle is connected with a pyrolusite slurry feeding pipe, a discharge port of each stage of reaction kettle is connected with a feed port of the leaching device at the same stage, a discharge port of the leaching device at the previous stage is connected with a feed port of the leaching device at the next stage, and a finished leaching solution is obtained at a discharge port of the fourth stage of leaching device; the fourth-stage reaction kettle is connected with a reducing gas inlet pipe, and a gas outlet of the next-stage reaction kettle is connected with a gas inlet of the previous-stage reaction kettle.

In the utility model, each stage of reaction kettle is provided with an air return pipe which connects the air outlet of the reaction kettle with the air inlet; each stage of leaching device is provided with a return pipe, and the return pipe is connected with a feed inlet of the reaction kettle corresponding to the stage of leaching device.

The utility model discloses in, be provided with the spray set who is connected with this level of reation kettle's feed inlet in each level of reation kettle.

The utility model discloses in, each grade reation kettle's air inlet and reation kettle's tangent setting of inner wall to make the reducing gas who gets into in the reation kettle form the vortex air current, the vortex air current with the liquid reverse contact that spray set sprayed out and react.

The utility model discloses in, set up the buffer board in the reation kettle, the reducing gas pass through the buffer board with spray set sprays the liquid contact that comes out.

The utility model discloses in, set up the hole that the aperture is 10 ~ 100 microns on the buffer board, the porosity of buffer board is 30 ~ 50%, the gas permeability of buffer board 0.5 ~ 1.5m ³ /m ² ·min。

The utility model discloses in, the buffer board is adapted to the reation kettle setting and with the feeding zone on reation kettle internal partitioning for upper portion and the intake zone of lower part, the elastic component is connected to the buffer board bottom, and the buffer board is along reation kettle's inner wall elevating and reciprocating motion along with the elastic component, and top thick liquids accumulate when making the buffer board descend to given position, form the breach between the inner wall of buffer board and reation kettle, and the thick liquids at buffer board top pass through the breach gets into the feeding zone of lower part from the feeding zone on reation kettle upper portion.

The utility model discloses in, elasticity subassembly includes the telescopic link and sets up in the outside spring of telescopic link.

Has the advantages that: manganese sulfate system of leaching, absorb and react the multistage circulation after absorbing through the multistage circulation reaction of reducing gas and leach, effectively reduce the remaining of accessory substance manganous dithionate, also can reduce reducing gas's concentration step by step simultaneously, reduce the tail gas treatment degree of difficulty.

Manganese sulfate leach system, continue the reaction in reaction back some reducing gas gets into last order reation kettle to reducing the gaseous concentration of reducing in the reation kettle step by step, do benefit to the formation of further control accessory substance manganous dithionate.

Manganese sulfate leaching system, reducing gas is more comprehensive with pyrolusite thick liquid contact, reacts more fully thoroughly to effectively improve the leaching rate.

Drawings

Fig. 1 is a schematic structural diagram of a system for efficient leaching of sulfuric acid from pyrolusite.

Fig. 2 is a schematic diagram of the connection of a reaction kettle and a leaching device in a system for efficiently leaching sulfuric acid from pyrolusite.

FIG. 3 is a schematic diagram of the formation of a swirling gas flow in a system for efficient leaching of sulfuric acid from pyrolusite.

Fig. 4 is a schematic view (one) of the installation of a buffer plate in a system for efficiently leaching sulfuric acid from pyrolusite.

Fig. 5 is a schematic view (two) of the installation of the buffer plate in the system for efficiently leaching the sulfuric acid from the pyrolusite.

Wherein: 1. a first-stage reaction kettle; 2. a second-stage reaction kettle; 3. a third-stage reaction kettle; 4. a fourth-stage reaction kettle; 5. a pyrolusite pulp feeding pipe; 6. a pyrolusite slurry storage tank; 7. a reducing gas inlet pipe; 8. a leachate storage tank; 9. a first stage leaching agitation tank; 10. a second stage leaching agitation tank; 11. a third stage leaching agitation tank; 12. a fourth stage leaching agitation tank; 13. a return pipe; 14. an air return pipe; 15. a spraying device; 16. a buffer plate; 17. an air inlet; 18. mounting a plate; 19. a telescopic rod; 20. a spring; 21. and (4) a notch.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Referring to fig. 1 to 5, the system for efficiently leaching manganese sulfate from pyrolusite according to the present invention includes four-stage reaction vessels and corresponding four-stage leaching devices, namely a first-stage reaction vessel 1, a second-stage reaction vessel 2, a third-stage reaction vessel 3, and a fourth-stage reaction vessel 4, wherein the leaching devices are leaching agitation tanks, namely a first-stage leaching agitation tank 9, a second-stage leaching agitation tank 10, a third-stage leaching agitation tank 11, and a fourth-stage leaching agitation tank 12. The first order reation kettle 1 is connected pyrolusite thick liquid inlet pipe 5, pyrolusite thick liquid inlet pipe 5 is connected with pyrolusite thick liquid storage tank 6, every grade of reation kettle's discharge gate and the feed inlet of same stage leaching device are connected to the pyrolusite thick liquid that makes after the completion of reaction in reation kettle gets into the same stage leaching device and further leaches, the discharge gate of last order leaching device is connected with next stage reation kettle's feed inlet, thereby the pyrolusite thick liquid after leaching gets into next stage reation kettle and continues to react with reducing gas. A finished leachate is obtained at a discharge hole of the fourth-stage leaching stirring tank 12, and the finished leachate enters a leachate storage tank 8 for storage; fourth order reation kettle 4 connects reducing gas intake pipe 7, consequently, reducing gas begins to get into from fourth order reation kettle 4, and next-stage reation kettle's gas outlet is connected with last one-level reation kettle's air inlet 17, thereby gas after the completion of reaction in the next-stage reation kettle further gets into and continues the reaction in the last one-level reation kettle, and the setting of accessible check valve, guarantee gas conveying direction, and guarantee to reduce gradually from fourth order reation kettle 4 to the reducing gas concentration in the first order reation kettle 1.

As shown in fig. 2, a spraying device 15 connected with the feed inlet is arranged in each stage of the reaction kettle, and the spraying device 15 enables pyrolusite slurry to be fully dispersed in the reaction kettle, so that the pyrolusite slurry can be better contacted with reducing gas. As shown in fig. 3, the air inlet 17 of each stage of reaction kettle is arranged tangentially to the inner wall of the reaction kettle and jets air at a high speed in a single direction at an upward oblique angle, the jet speed range is 1-10 m/s, so that the reducing gas entering the reaction kettle forms a vortex air flow, and the vortex air flow reversely contacts the liquid sprayed by the spraying device 15 to react. As shown in fig. 2, the spraying device 15 is disposed at the middle upper part of the reaction kettle, the top of the spraying device 15 is further provided with a defogging device, the spraying device 15 comprises a plurality of spraying heads, the openings of the spraying heads face downwards, and liquid sprayed by the spraying heads is sprayed from top to bottom and contacts with vortex airflow moving from bottom to top.

In some preferred embodiments, as shown in fig. 2, a buffer plate 16 is disposed in the reaction kettle, the reducing gas contacts the slurry sprayed by the spraying device 15 through the buffer plate 16, a hole through which the slurry is difficult to permeate and the gas easily passes is disposed on the buffer plate 16, specifically, a hole with a pore diameter of 10-100 μm is disposed on the buffer plate, the porosity of the buffer plate is about 40%, and the gas permeability of the buffer plate is 0.8m ³ /m ² Min. The reducing gas can be fully contacted with the sprayed pyrolusite slurry through the buffer plate 16 after forming vortex gas flow, and can promote the dispersion movement of pyrolusite slurry liquid molecules accumulated on the upper part of the buffer plate 16, prolong the contact time and the path, and ensure that the pyrolusite slurry and the reducing gas are more fully reacted.

In some embodiments, the buffer plate 16 is an automatic discharge buffer plate 16. As shown in fig. 4 and 5, the buffer plate 16 is adapted to the reaction kettle and is horizontally arranged, the buffer plate 16 divides the interior of the reaction kettle into an upper feeding area and a lower air inlet area, the bottom of the buffer plate 16 is connected with an elastic component, and the elastic component includes an expansion link 19 and a spring 20 arranged outside the expansion link 19. Elastic component bottom is fixed in on mounting panel 18, and mounting panel 18 is fixed in the reation kettle inner wall, and buffer board 16 is along the inner wall lifting reciprocating motion of reation kettle under top thick liquid pressure effect, and top thick liquids accumulation makes buffer board 16 descend to when the given position under the action of gravity, forms breach 21 between buffer board 16 and reation kettle's inner wall, and the thick liquids at buffer board 16 top pass through breach 21 gets into the intake zone of lower part from the intake zone on reation kettle upper portion, further gets into the homophase agitator tank that leaches after contacting with vortex air current, and unload and reset under spring 20's effect after accomplishing, and automatic discharge can be realized to buffer board 16's lifting reciprocating motion, and can prolong the thick liquids that spray and reducing gas's contact time, make more absorption reaction gas of thick liquids and react.

In the invention, each stage of reaction kettle is provided with the air return pipe 14, the air return pipe 14 is provided with the one-way valve, and the air return pipe 14 connects the air outlet of the reaction kettle with the air inlet 17, so that one part of reducing gas after the reaction in each stage of reaction kettle is completed enters the previous stage of reaction kettle, and the other part of reducing gas flows back and forms a vortex airflow again through the air inlet 17 to enter the reaction kettle for continuous reaction. Each stage of leaching device is provided with a return pipe 13, the return pipe 13 is also provided with a one-way valve, and the return pipe 13 is connected with the feeding hole of the reaction kettle corresponding to the stage of leaching device, so that the leaching solution can circularly enter the reaction kettle through the spraying device 15 to continue to react with the reducing gas, the full proceeding of the reaction is ensured, and the generation of byproducts is reduced.

The system provided by the invention is applied to leaching manganese sulfate from pyrolusite pulp, the leaching rate of the obtained manganese sulfate is as high as 97.9%, and the content of impurity manganese sulfate in the leaching solution is as low as 0.8%. The subsequent treatment difficulty can be reduced, and the quality of the final product is improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A manganese sulfate leaching system is characterized by comprising four stages of reaction kettles and corresponding four stages of leaching devices, wherein the first stage of reaction kettle is connected with a pyrolusite slurry feeding pipe, a discharging port of each stage of reaction kettle is connected with a feeding port of the leaching device at the same stage, a discharging port of the leaching device at the previous stage is connected with a feeding port of the reaction kettle at the next stage, and a discharging port of the fourth stage leaching device obtains a leaching solution finished product; the fourth-stage reaction kettle is connected with a reducing gas inlet pipe, and a gas outlet of the next-stage reaction kettle is connected with a gas inlet of the previous-stage reaction kettle.

2. The manganese sulfate leaching system according to claim 1, wherein each stage of reaction kettle is provided with an air return pipe, and the air return pipe connects an air outlet and an air inlet of the reaction kettle; each stage of leaching device is provided with a return pipe, and the return pipe is connected with a feed inlet of the reaction kettle corresponding to the stage of leaching device.

3. The manganese sulfate leaching system of claim 1, wherein each stage of reaction kettle is provided with a spray device connected with the feed inlet of the stage of reaction kettle.

4. The manganese sulfate leaching system according to claim 3, wherein the gas inlet of each stage of reaction kettle is tangential to the inner wall of the reaction kettle, so that the reducing gas entering the reaction kettle forms a vortex gas flow, and the vortex gas flow reversely contacts the liquid sprayed by the spraying device to react.

5. The manganese sulfate leaching system of claim 3, wherein a buffer plate is arranged in the reaction kettle, and the reducing gas is in contact with the liquid sprayed by the spraying device through the buffer plate.

6. The manganese sulfate leaching system of claim 5, wherein the buffer plate is provided with pores with a pore diameter of 10-100 microns, the porosity of the buffer plate is 30-50%, and the air permeability of the buffer plate is 0.5-1.5 m ³ /m ² ·min。

7. The manganese sulfate leaching system according to claim 5, wherein the buffer plate is adapted to be arranged in the reaction kettle and divides the interior of the reaction kettle into an upper feeding area and a lower gas inlet area, the bottom of the buffer plate is connected with the elastic component, the buffer plate moves up and down along the inner wall of the reaction kettle along with the elastic component in a reciprocating mode, when slurry at the top is accumulated to enable the buffer plate to descend to a preset position, a gap is formed between the buffer plate and the inner wall of the reaction kettle, and the slurry at the top of the buffer plate enters the lower gas inlet area from the upper feeding area of the reaction kettle through the gap.

8. The manganese sulfate leaching system of claim 7, wherein the resilient assembly comprises a telescoping rod and a spring disposed outside of the telescoping rod.