Nickel electrolysis anode slime cleaning and recycling system

Abstract

The invention discloses a nickel electrolysis anode slime tank cleaning and recycling system which comprises a discharge pipeline subsystem, a nickel electrolysis anode slime tank cleaning subsystem and a nickel electrolysis anode slime tank cleaning subsystem, an anode mud filtering subsystem; a nickel sulfate recovery subsystem; wherein the discharge pipeline subsystem comprises a plurality of anode slime vertical pipes, and a nickel electrolytic bath is mounted at the inlet end of the top of each anode slime vertical pipe through a valve; the anode mud branch pipe is arranged on the ground through a supporting frame, a plurality of feeding ports are formed in the upper side of the anode mud branch pipe, each feeding port is correspondingly provided with one anode mud vertical pipe, and a discharging port is formed in the lower side of the anode mud branch pipe; the anode mud header pipe is arranged at the lower part of the anode mud branch pipe, and the top inlet end of the anode mud header pipe is connected with the discharge hole of the anode mud branch pipe; the anode mud filtering subsystem comprises a filtering device, and the inlet end of the filtering device is connected with the outlet end of the bottom of an anode mud header pipe. The anode mud in the electrolytic tank can be automatically removed through the electrolytic tank and the discharge pipeline subsystem, manual tank cleaning is replaced, and the problem that equipment and facilities are corroded due to the fact that the anode mud falls to the ground and splashes during traditional slotting is solved.

Description

Technical Field

[0001] The invention relates to the technical field of hydrometallurgical equipment, and in particular to a nickel electrolytic anode mud cleaning tank recovery system. Background Art

[0002] In the nickel-cobalt electrolytic refining process, the soluble anode diaphragm electrolysis process is widely used because of its mature technology and stable products. The nickel anode plate used in the soluble anode diaphragm electrolysis process is a high-sulfur anode plate, which mainly contains Ni, Cu, Fe, S, precious metals and platinum group metals. During the anode dissolution process, part of the cobalt, iron hydroxide, metallic copper, all precious metals and platinum group metals are transferred into the anode mud. Due to the high sulfur content of the anode plate, the anode mud output is large, reaching 20%-25% of the original weight of the anode. The anode mud gradually accumulates in the electrolytic cell, which reduces the effective volume of the cell body, easily causes sticking of the plate, increases the cell voltage, and increases power consumption. For this reason, nickel electrolysis requires regular cleaning of the cell.

[0003] The traditional method of cleaning the electrolytic cell is to manually pull out the rubber plug at the bottom of the electrolytic cell, allowing the mixed slurry of electrolyte and anode mud to fall into the ground, and then manually load it into a truck with a shovel and transport it away. This method has the problems of difficult removal of the rubber plug, splashing of anode mud on the ground and corroding equipment and facilities, failure to separate anode mud and anode liquid, failure to directly recycle the anode liquid, and high nickel content in the anode mud. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a nickel electrolysis anode mud cleaning and recovery system.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows: A nickel electrolysis anode mud cleaning and recovery system, comprising: Discharge piping subsystem; Anode mud filtration subsystem; Nickel sulfate recovery subsystem; Among them, the discharge pipeline subsystem includes: Several anode mud risers, each with a nickel electrolytic cell installed on its top inlet end through a valve; The anode mud branch pipe is set on the ground through a support frame, and a plurality of feed ports are set on its upper side. Each feed port is correspondingly installed with an anode mud riser, and a discharge port is set on its lower side; The anode mud main pipe is arranged at the lower part of the anode mud branch pipe, and its top inlet end is connected to the discharge port of the anode mud branch pipe; Among them, the anode mud filtration subsystem includes: A filtering device, the inlet end of which is connected to the outlet end at the bottom of the anode mud main pipe; The filtered liquid pool is installed outside the filtering device and is used to receive the filtrate filtered by the filtering device; The inlet end of the anolyte outlet pipe is connected to the bottom outlet of the filtered liquid pool; Among them, the nickel sulfate recovery subsystem includes: liquid storage tank; An anolyte filter tank is arranged on the top of the inner wall of the liquid storage tank, and its inlet end is connected to the outlet end of the anolyte outlet pipe; A liquid level gauge, arranged on the top of the liquid storage tank; The anode liquid recovery pump is arranged on the top of the liquid storage tank, the liquid inlet pipe of which is arranged in the liquid storage tank, and the liquid level meter is interlocked with the anode liquid recovery pump.

[0006] The valves on the top inlet end of the anode mud riser are an anode mud manual ball valve and an anode mud pneumatic regulating valve.

[0007] Anode liquid flushing pipes are respectively arranged at both ends of the anode mud branch pipe, and an anode liquid pneumatic regulating valve is arranged on the anode liquid flushing pipe; a branch pipe density meter and a branch pipe viewing window are arranged on the anode mud branch pipe.

[0008] The anode mud main pipe is provided with a main pipe viewing window.

[0009] The anode mud filtering subsystem further includes: The splash-proof cover plate is arranged on the bottom outlet end of the anode mud main pipe and covers the inlet end of the filter device; Main pipe density meter is installed on the anode mud main pipe.

[0010] The filtering device comprises: A filter bucket, the upper part of which is provided with a lifting lug; The filter screen is horizontally arranged in the filter bucket; The anode liquid outlet is arranged on the side wall at the bottom of the filter bucket.

[0011] A transfer trolley is arranged at the bottom of the filter bucket, and wheels are arranged at the bottom of the transfer trolley.

[0012] The beneficial effects of the present invention are as follows: the present invention effectively solves the problems of difficult removal of rubber plugs, corrosion of equipment and facilities caused by anode mud splashing on the ground, failure to separate anode mud from nickel sulfate, failure to directly recycle anode liquid, and high nickel content in anode mud. The present invention can automatically remove anode mud in the electrolytic cell through the electrolytic cell and discharge pipe subsystem, replacing manual cleaning of the cell, and solves the problem of corrosion of equipment and facilities caused by anode mud splashing on the ground during traditional cell excavation; the present invention separates anode liquid from nickel anode mud through the anode mud filtering subsystem, reducing the nickel content of nickel anode mud to less than 1%; the present invention allows the anode liquid to enter the production system for recycling through the recovery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 Rear view of Figure 3 for Figure 1 Side view of Figure 4 It is a schematic structural diagram of the filtering device of the present invention.

[0014] In the figure: 1-discharge pipeline subsystem, 2-anode mud filtration subsystem, 3-nickel sulfate recovery subsystem, 1.1-nickel electrolytic cell, 1.2-anode mud manual ball valve, 1.3-anode mud pneumatic regulating valve, 1.4-anode mud riser, 1.5-anode mud branch pipe, 1.51-anode liquid flushing pipe, 1.52-anode liquid pneumatic regulating valve, 1.53-branch pipe density meter, 1.6-support frame, 1.7-branch pipe window, 1.8-anode mud main pipe , 1.9-main pipe window, 2.1-filter device, 2.2-splash-proof cover, 2.3-filtered liquid pool, 2.4-anode liquid outlet pipe, 2.5-main pipe density meter, 3.1-anode liquid filter tank, 3.2-liquid level meter, 3.3-anode liquid recovery pump, 3.4-liquid storage tank, 2.11-filter bucket, 2.12-transfer trolley, 2.13-wheels, 2.14-anode liquid outlet, 2.15-filter screen, 2.16-lifting ear. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0016] like Figures 1 to 4As shown, a nickel electrolysis anode mud cleaning tank recovery system comprises: a discharge pipeline subsystem 1; an anode mud filtering subsystem 2; a nickel sulfate recovery subsystem 3; wherein the discharge pipeline subsystem 1 comprises: a plurality of anode mud risers 1.4, each of which has a nickel electrolytic cell 1.1 installed on its top inlet end through a valve; an anode mud branch pipe 1.5, which is arranged on the ground through a support frame 1.6, and has a plurality of feed ports arranged on its upper side, each of which has an anode mud riser 1.4 installed corresponding to the feed port, and has a discharge port arranged on its lower side; an anode mud main pipe 1.8, which is arranged at the lower part of the anode mud branch pipe 1.5, and its top inlet end is connected to the discharge port of the anode mud branch pipe 1.5; wherein the anode mud filtering subsystem 2 comprises: a filtering device The inlet end of the filter device 2.1 is connected to the bottom outlet end of the anode mud main pipe 1.8; the filtered liquid pool 2.3 is installed outside the filter device 2.1 and is used to receive the filtrate filtered by the filter device 2.1; the anode liquid outlet pipe 2.4, the inlet end of which is connected to the bottom outlet of the filtered liquid pool 2.3; wherein the nickel sulfate recovery subsystem 3 includes: a liquid storage tank 3.4; an anode liquid filter tank 3.1, which is arranged on the top of the inner wall of the liquid storage tank 3.4, and its inlet end is connected to the outlet end of the anode liquid outlet pipe 2.4; a liquid level meter 3.2, which is arranged on the top of the liquid storage tank 3.4; an anode liquid recovery pump 3.3, which is arranged on the top of the liquid storage tank 3.4, and its liquid inlet pipe is arranged in the liquid storage tank 3.4, and the liquid level meter 3.2 is interlocked with the anode liquid recovery pump 3.3. The valves on the top inlet end of the anode mud riser 1.4 are the anode mud manual ball valve 1.2 and the anode mud pneumatic regulating valve 1.3. Anode liquid flushing pipes 1.51 are respectively provided at both ends of the anode mud branch pipe 1.5, and an anode liquid pneumatic regulating valve 1.52 is provided on the anode liquid flushing pipe 1.51; a branch pipe density meter 1.53 and a branch pipe window 1.7 are provided on the anode mud branch pipe 1.5. A main pipe window 1.9 is provided on the anode mud main pipe 1.8. The anode mud filtering subsystem 2 also includes: a splash-proof cover plate 2.2, which is provided on the bottom outlet end of the anode mud main pipe 1.8 and covers the inlet end of the filtering device 2.1; a main pipe density meter 2.5, which is provided on the anode mud main pipe 1.8. The filtering device 2.1 includes: a filter bucket 2.11, a lifting ear 2.16 is provided on the upper part of the filter bucket 2.11; a filter screen 2.15, which is horizontally provided in the filter bucket 2.11; and an anode liquid outlet 2.14, which is provided on the bottom side wall of the filter bucket 2.11. A transfer trolley 2.12 is disposed at the bottom of the filter bucket 2.11, and wheels 2.13 are disposed at the bottom of the transfer trolley 2.12.

[0017] Comparative Example The nickel anode plate contains Ni67% and S23.5%, the current is 13000A, the anode slotting cycle is 140 days, and the rubber plugs at the bottom of the electrolytic cell are pulled out one by one with an auxiliary tool iron hook. The mixed slurry of anode mud and anode liquid falls on the electrolytic ground and splashes on the equipment and facilities. The electrolytic cells are manually washed one by one with tap water pipes. After that, the anode mud on the ground is cleaned up manually with shovels and brooms, and pulled out with agricultural vehicles and piled in outdoor material yards for exposure for more than 6 months. The anode mud is desulfurized and contains about 4-10% nickel. The anode liquid is not separated and cannot be recycled.

[0018] Example 1 Nickel anode plate contains Ni67%, S23.5%, current 13000A, anode slotting cycle 140 days, refer to Figure 1-Figure 4 As shown, it includes an electrolytic cell and discharge pipeline subsystem 1, an anode mud filtering subsystem 2, and an anode liquid recovery system 3.

[0019] When the nickel electrolytic cell 1.1 is being cleaned, the anode mud manual ball valve 1.2 is in the normally open state and is closed during system maintenance. The anode mud pneumatic regulating valve 1.3 is closed during normal production and is opened when the cell is being cleaned. The anode mud riser 1.4 is inserted into the anode mud branch pipe 1.5. The anode mud main pipe 1.8 connects the anode mud branch pipe 1.5 with the filter device 2.1. The branch pipe window 1.7 and the main pipe window 1.9 are used to observe the flow of anode mud in the pipe. If the anode mud flows poorly, observe the values ​​of the branch pipe density meter 1.53 and the main pipe density meter 2.5. When the density exceeds the limit, the anode liquid pneumatic regulating valve 1.52 automatically opens, and the anode liquid solution enters the anode liquid flushing pipe 1.51.

[0020] Anode mud enters anode mud filtering subsystem 2 through main pipe 1.8, splash-proof cover plate 2.2 prevents anode mud from splashing out, filter bucket 2.11 sits on transfer trolley 2.12, wheels 2.13 are used to move the trolley out of filtering device 2.1, filter net 2.15 is arranged in filter bucket 2.11, polypropylene filter cloth is covered on corrosion-resistant grid plate, lifting lug 2.16 is used to lift the dried anode mud in filter bucket 2.11 to anode mud transport vehicle for unloading, and anode mud contains about 0.3-1% nickel.

[0021] The filtered anode liquid enters the filtered liquid pool 2.3, and enters the anode liquid filter tank 3.1 through the anode liquid outlet pipe 2.4 to filter out the trace anode mud solid particles entrained. The liquid level meter 3.2 is used to detect the anode liquid level and is interlocked with the anode liquid recovery pump 3.3. The anode liquid is pumped into the production system anode liquid storage tank for recycling.

[0022] Example 2 Nickel anode plate contains Ni67%, S23.5%, current 13000A, anode slotting cycle 140 days, refer to Figure 1-Figure 4 As shown, it includes an electrolytic cell and discharge pipeline subsystem 1, an anode mud filtering subsystem 2, and a nickel sulfate recovery subsystem 3.

[0023] When the nickel electrolytic cell 1.1 is being cleaned, the anode mud manual ball valve 1.2 is in the normally open state and is closed during system maintenance. The anode mud pneumatic regulating valve 1.3 is closed during normal production and is opened during the cleaning. The anode mud riser 1.4 is inserted into the anode mud branch pipe 1.5. The anode mud main pipe 1.8 connects the anode mud branch pipe 1.5 with the filter device 2.1. The branch pipe window 1.7 and the main pipe window 1.9 are used to observe the flow of anode mud in the pipe. If the anode mud flows poorly, observe the values ​​of the branch pipe density meter 1.53 and the main pipe density meter 2.5. When the density exceeds the limit, the anode liquid pneumatic regulating valve 1.52 automatically opens, and the anode liquid enters the anode liquid flushing pipe 1.51.

[0024] The anode mud mixed slurry directly enters the anode liquid filter tank 3.1 to filter out the anode mud solid particles. Since the anode liquid filter tank is immersed in the anode liquid, the anode mud contains about 10-40% nickel. The liquid level meter 3.2 is used to detect the anode liquid level and is linked with the anode liquid recovery pump 3.3. The anode liquid is pumped into the anode liquid storage tank of the production system for recycling.

[0025] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A nickel electrolysis anode mud cleaning and recovery system, characterized in that: include: Discharge piping subsystem (1); Anode mud filtration subsystem (2); Nickel sulfate recovery subsystem (3); The discharge pipe subsystem (1) includes: A plurality of anode mud risers (1.4), each having a nickel electrolytic cell (1.1) installed on its top inlet end through a valve; The anode mud branch pipe (1.5) is arranged on the ground through a support frame (1.6), and a plurality of feed ports are arranged on the upper side thereof, each feed port is correspondingly installed with an anode mud riser (1.4), and a discharge port is arranged on the lower side thereof; An anode mud main pipe (1.8) is arranged at the lower part of the anode mud branch pipe (1.5), and its top inlet end is connected to the discharge port of the anode mud branch pipe (1.5); The anode mud filtering subsystem (2) comprises: A filtering device (2.1), the inlet end of which is connected to the outlet end at the bottom of the anode mud main pipe (1.8); A filtered liquid pool (2.3) is installed outside the filtering device (2.1) and is used to receive the filtrate filtered by the filtering device (2.1); An anode liquid outlet pipe (2.4), the inlet end of which is connected to the bottom outlet of the filtered liquid pool (2.3); The nickel sulfate recovery subsystem (3) includes: Liquid storage tank (3.4); An anolyte filter tank (3.1) is arranged on the top of the inner wall of the liquid storage tank (3.4), and its inlet end is connected to the outlet end of the anolyte outlet pipe (2.4); A liquid level meter (3.2) is arranged on the top of the liquid storage tank (3.4); The anolyte recovery pump (3.3) is arranged on the top of the liquid storage tank (3.4), and its liquid inlet pipe is arranged in the liquid storage tank (3.4). The liquid level meter (3.2) is interlocked with the anolyte recovery pump (3.3).

2. A nickel electrolysis anode mud cleaning and recovery system according to claim 1, characterized in that: The valves on the top inlet end of the anode mud riser (1.4) are an anode mud manual ball valve (1.2) and an anode mud pneumatic regulating valve (1.3).

3. A nickel electrolysis anode mud cleaning and recovery system according to claim 1, characterized in that: Anode liquid flushing pipes (1.51) are respectively provided at both ends of the anode mud branch pipe (1.5), and an anode liquid pneumatic regulating valve (1.52) is provided on the anode liquid flushing pipe (1.51); and a branch pipe density meter (1.53) and a branch pipe viewing window (1.7) are provided on the anode mud branch pipe (1.5).

4. A nickel electrolysis anode mud cleaning and recovery system according to claim 1, characterized in that: The anode mud main pipe (1.8) is provided with a main pipe viewing window (1.9).

5. A nickel electrolysis anode mud cleaning and recovery system according to claim 1, characterized in that: The anode mud filtering subsystem (2) further comprises: An anti-splash cover plate (2.2) is arranged on the bottom outlet end of the anode mud main pipe (1.8) and covers the inlet end of the filtering device (2.1); The main pipe density meter (2.5) is installed on the anode mud main pipe (1.8).

6. A nickel electrolysis anode mud cleaning and recovery system according to claim 1, characterized in that: The filtering device (2.1) comprises: A filter bucket (2.11) having a lifting lug (2.16) disposed on the upper portion thereof; A filter screen (2.15) is horizontally arranged in the filter bucket (2.11); The anolyte outlet (2.14) is arranged on the bottom side wall of the filter bucket (2.11).

7. A nickel electrolysis anode mud cleaning and recovery system according to claim 6, characterized in that: A transfer trolley (2.12) is provided at the bottom of the filter bucket (2.11), and wheels (2.13) are provided at the bottom of the transfer trolley (2.12).

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