Nickel carbonate continuous preparation device

Abstract

The utility model discloses a continuous nickel carbonate preparation device which comprises a plurality of preparation tanks which are connected in series, flow guide pipes are arranged at internal outlets of the preparation tanks, and the preparation tanks are connected through external circulating pipelines; a tank cover is arranged at the top of the preparation tank; a stirring device, a steam inlet, a tank opening thermometer, a tank opening pH meter, a tank opening liquid level meter, a sodium carbonate pipeline, a compressed air pipe for stirring and a compressed air pipe for lifting are mounted on the tank cover; a compressed air pipe for stirring enters the preparation tank from the side surface, and an umbrella-shaped spray head is arranged at the tail end and is positioned in the center of the bottom of the preparation tank; a compressed air pipe for lifting enters the bottom of the preparation tank from the top of the tank cover; a sampling opening, a pH meter, a quick-switching valve, a quick-closing blind plate and a quick-opening blind plate are arranged on the outer circulating pipeline; wherein the sampling port, the pH meter and the quick switching valve are mounted at the tail end of the outer circulating pipeline.

Description

Technical Field

[0001] The utility model belongs to the field of hydrometallurgy equipment, and particularly relates to a device for continuously preparing nickel carbonate. Background Art

[0002] In the wet production process of nickel and cobalt, in order to keep the sodium ion concentration in the electrolyte within a certain range and balance the solution volume, a certain amount of anolyte is pumped out every day to produce nickel carbonate to remove sodium salts and reduce the volume. The existing technology is to pump the electrowinning anolyte into an air stirring tank, add sodium carbonate solution at the same time, and stir with air blast, controlling a certain temperature and pH value. Nickel ions produce nickel carbonate, and sodium ions are discharged with the supernatant. The tanks of this device are connected by series pipelines between each other. Repairing or dealing with one of the tanks requires the entire system to stop, and continuous production cannot be achieved; the interlock control of temperature, pH and flow rate adjustment has not been realized, and manual adjustment has a large error, and the key parameters cannot be accurately controlled, resulting in unstable quality of nickel carbonate; compressed air is directly added through pipelines without a stirring device, which is unevenly distributed in the tank and has poor stirring effect. Studying a device to realize the continuous preparation of nickel carbonate and improve the quality of nickel carbonate is the purpose of our research. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a device for continuously preparing nickel carbonate, aiming to solve the problem that in the existing production process of nickel carbonate, due to the lack of a stirring device, the production effect and product quality are not high.

[0004] For this purpose, the utility model adopts the following technical solutions:

[0005] A device for continuously preparing nickel carbonate includes a plurality of preparation tanks, which are in series, and a diversion pipe is provided at the internal outlet. The preparation tanks are connected by an external circulation pipeline;

[0006] The top of the preparation tank is provided with a tank cover, and a stirring device, a steam inlet, a tank mouth thermometer, a tank mouth pH meter, a tank mouth liquid level meter, a sodium carbonate pipeline, a compressed air pipe for stirring, and a compressed air pipe for lifting are installed on the tank cover;

[0007] The compressed air pipe for stirring enters the preparation tank from the side, and an umbrella-shaped nozzle is provided at the end, and the umbrella-shaped nozzle is located at the center of the bottom of the preparation tank; the compressed air pipe for lifting enters the bottom of the preparation tank from the top of the tank cover;

[0008] The external circulation pipeline is provided with a sampling port, a pH meter, a quick cut valve, a quick closing blind plate, and a quick opening blind plate; among them, the sampling port, the pH meter, and the quick cut valve are installed at the end of the external circulation pipeline.

[0009] Further, the stirring device includes a speed reducer, a transmission shaft, a motor, a speed reducer bracket, and stirring blades.

[0010] Further, it also includes a main compressed air pipe, which is connected to the compressed air pipe for stirring and the compressed air pipe for lifting.

[0011] Further, the quick-cut valve is a pneumatic control valve; pneumatic control valves are installed on the anolyte inlet pipe, steam inlet, sodium carbonate pipe, compressed air pipe for stirring, compressed air pipe for lifting, and main compressed air pipe.

[0012] Further, the thermometer at the tank mouth is interlocked with the steam inlet control valve; the pH meter at the tank mouth is interlocked with the flow control valve of the sodium carbonate pipe; the liquid level gauge at the tank mouth is interlocked with the control valve of the compressed air pipe for stirring.

[0013] The beneficial effects of the present utility model are as follows: It realizes the continuous production without stopping the tank by switching the blind plate during a fault; it sets a cooperation mode of the stirring device, compressed air and umbrella-shaped nozzles to achieve uniform distribution of the three-phase medium; it sets an interlocking and automatic adjustment control to achieve precise control of flow rate, temperature and pH value, and improve the quality of nickel carbonate. Description of the Drawings

[0014] Figure 1 It is the main structural view of the present utility model;

[0015] Figure 2 It is the schematic diagram of the monomer structure of the present utility model;

[0016] Figure 3 It is the top view of the structure of the present utility model;

[0017] In the figure: 1. Preparation tank; 2. External circulation pipe; 3. Anolyte inlet pipe; 4. Reducer; 5. Transmission shaft; 6. Motor; 7. Sampling port; 8. pH meter; 9. Quick-cut valve; 10. Quick-close blind plate; 11. Quick-open blind plate; 12. Reducer support; 13. Safety railing; 14. Steam inlet; 15. Thermometer at the tank mouth; 16. pH meter at the tank mouth; 17. Liquid level gauge at the tank mouth; 18. Sodium carbonate pipe; 19. Compressed air pipe for stirring; 20. Umbrella-shaped compressed air nozzle; 21. Compressed air pipe for lifting; 22. Stirring device; 23. Stirring paddle; 24. Main compressed air pipe; 25. Tank cover; 26. Diversion pipe. Detailed Embodiments

[0018] The following further illustrates the present utility model in conjunction with the drawings and specific embodiments:

[0019] It includes a preparation tank 1, an external circulation pipeline 2, an anolyte inlet pipe 3, a speed reducer 4, a transmission shaft 5, a motor 6, a sampling port 7, a pH meter 8, a quick cut-off valve 9, a quick closing blind plate 10, a quick opening blind plate 11, a speed reducer support 12, a safety railing 13, a steam inlet 14, a tank mouth thermometer 15, a tank mouth pH meter 16, a tank mouth level gauge 17, a sodium carbonate pipeline 18, a compressed air pipe for stirring 19, an umbrella-shaped nozzle 20, a compressed air pipe for lifting 21, a stirring device 22, a stirring paddle 23, a compressed air main pipe 24, a tank cover 25, and a diversion pipe 26.

[0020] The preparation tanks 1 are connected in series, and the tanks are connected by the external circulation pipeline 2, which is located in the upper middle part of the preparation tank.

[0021] The top of the preparation tank 1 is connected with a tank cover 27, on which a stirring device 22, a safety railing 13, a steam inlet 14, a tank mouth thermometer 15, a tank mouth pH meter 16, a tank mouth level gauge 17, a sodium carbonate pipeline 18, a compressed air pipe for stirring 19, a compressed air pipe for lifting 21, and a compressed air main pipe 24 are installed.

[0022] The stirring device 22 includes a speed reducer 4, a transmission shaft 5, a motor 6, a speed reducer support 12, and a stirring paddle 23.

[0023] The external circulation pipeline 2 is provided with a sampling port 7, a pH meter 8, a quick cut-off valve 9, a quick closing blind plate 10, and a quick opening blind plate 11; among them, the sampling port 7, the pH meter 8, and the quick cut-off valve 9 are installed at the end of the external circulation pipeline 2.

[0024] The compressed air main pipe 24 is divided into a compressed air pipe for stirring 19 and a compressed air pipe for lifting 21; the compressed air pipe for stirring 19 enters the preparation tank 1 from the side, and an umbrella-shaped nozzle 20 is provided at the end, and the umbrella-shaped nozzle 20 is located at the center of the bottom of the preparation tank; the compressed air pipe for lifting 21 enters the bottom of the diversion pipe 26 in the preparation tank 1 from the top of the tank cover 25.

[0025] The quick cut-off valve 9 is a pneumatic control valve; the anolyte inlet pipe 3, the steam inlet 14, the sodium carbonate pipeline 18, the compressed air pipe for stirring 19, the compressed air pipe for lifting 21, and the compressed air main pipe 24 are all installed with pneumatic control valves;

[0026] The tank mouth thermometer 15 is interlocked and controlled with the steam inlet 14 control valve; the tank mouth pH meter 16 is interlocked and controlled with the sodium carbonate pipeline flow control valve 18; the tank mouth level gauge 17 is interlocked and controlled with the compressed air pipe for lifting 21 control valve.

[0027] The working principle of the present utility model is as follows:

[0028] Jog the motor 6 to start the stirring device 22; open the anolyte inlet pipe 3 to inject anolyte, and sequentially open the sodium carbonate pipeline 18, the steam inlet 14, the compressed air main pipe 24, and the compressed air pipe 19 for stirring.

[0029] Close the quick-closing blind plate 10 and open the quick-opening blind plate 11.

[0030] Precisely control the key parameters. According to the display of the tank mouth thermometer 15, the tank mouth pH meter 16, and the tank mouth liquid level gauge 17, using interlock control, adjust the liquid level in the preparation tank to 80% of the tank body height through the regulating valve of the anolyte inlet pipe 3; adjust the temperature in the first tank to 75°C through the regulating valve of the steam inlet 14; adjust the pH value in the first tank to 7.0 through the regulating valve of the sodium carbonate pipeline 18.

[0031] Open the compressed air 21 for lifting to make the mixed solution flow into the next-stage preparation tank 1. Through the automatic interlock control system, control the temperature in the tank to 80°C and the pH value to 7.5.

[0032] The mixed solution flows into the next-stage preparation tank 1 in sequence through the outer circulation pipeline 2 until the last stage to produce qualified nickel carbonate solution. At this time, control the temperature to 85°C and the pH value to 7.8.

[0033] Set a sampling port 7 and a pH meter 8 at the end of the outer circulation pipeline 2 as the final quality inspection safeguard measure. The pH value of the nickel carbonate supernatant is 7.8 - 9.0, and the nickel content in the supernatant is less than 10 mg / l.

[0034] There is no need to stop the vehicle when dealing with a faulty tank. When overhauling one of the faulty preparation tanks 1, it is necessary to open the quick-closing blind plate 10 and close the quick-opening blind plate 11 to make the mixed solution not enter the faulty preparation tank 1 but short-circuit into the next stage.

[0035] If the nickel carbonate finished product liquid is unqualified, immediately jog to close the quick-cut valve 9 to prevent it from flowing into the thickener.

Claims

1. A continuous preparation device for nickel carbonate, characterized in that, It includes a plurality of preparation tanks (1), the plurality of preparation tanks (1) are connected in series, a diversion pipe (26) is provided at the internal outlet, and the preparation tanks (1) are connected by an external circulation pipeline (2); The top of the preparation tank (1) is provided with a tank cover (25), and a stirring device (22), a steam inlet (14), a tank mouth thermometer (15), a tank mouth pH meter (16), a tank mouth liquid level gauge (17), a sodium carbonate pipeline (18), a compressed air pipe for stirring (19), and a compressed air pipe for lifting (21) are installed on the tank cover (25); The compressed air pipe for stirring (19) enters the preparation tank (1) from the side, and an umbrella-shaped nozzle is provided at the end, and the umbrella-shaped nozzle is located at the center of the bottom of the preparation tank (1); the compressed air pipe for lifting (21) enters the bottom of the preparation tank (1) from the top of the tank cover (25); The external circulation pipeline (2) is provided with a sampling port (7), a pH meter (8), a quick-cut valve (9), a quick-close blind plate (10), and a quick-open blind plate (11); among them, the sampling port (7), the pH meter (8), and the quick-cut valve (9) are installed at the end of the external circulation pipeline (2).

2. The continuous preparation device of nickel carbonate according to claim 1, characterized in that, The stirring device (22) includes a speed reducer (4), a transmission shaft (5), a motor (6), a support for the speed reducer (4), and a stirring blade (23).

3. The continuous nickel carbonate preparation device according to claim 1, characterized in that, It further includes a compressed air main pipe (24), and the compressed air main pipe (24) is connected to the compressed air pipe for stirring (19) and the compressed air pipe for lifting (21).

4. The continuous preparation device of nickel carbonate according to claim 1, wherein, The quick-cut valve (9) is a pneumatic control valve; the anolyte inlet pipe (3), the steam inlet (14), the sodium carbonate pipeline (18), the compressed air pipe for stirring (19), the compressed air pipe for lifting (21), and the compressed air main pipe (24) are all installed with pneumatic control valves.

5. The continuous preparation device of nickel carbonate according to claim 1, characterized in that, The tank mouth thermometer (15) is interlocked and controlled with the steam inlet (14) control valve; the tank mouth pH meter (16) is interlocked and controlled with the flow control valve of the sodium carbonate pipeline (18); the tank mouth liquid level gauge (17) is interlocked and controlled with the control valve of the compressed air pipe for stirring (19).

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