A Chlorine-Leached Nickel Concentrate Production Unit with Improved Chlorine Reaction Rate

Abstract

This invention provides a chlorination leaching nickel concentrate production apparatus for improving chlorine reaction rate. The apparatus includes a chlorination leaching tank filled with a mixture, into which a material mixing reaction tube and a mechanical stirring device are inserted. The material mixing reaction tube has an inlet and an outlet at both ends, and an outlet in the middle. An inlet control valve and an outlet control valve are respectively installed on both sides of the outlet. A circulation pump is located on the side of the chlorination leaching tank, and its inlet is connected to the chlorination leaching tank via a circulation pump feed pipe, which is equipped with an inlet control valve. This invention employs a multi-stage circulating mixing reaction, resulting in a more complete chlorine reaction, better mixing effect, improved production efficiency, and prevention of chlorine spillage and environmental pollution.

Description

Technical Field

[0001] This utility model belongs to the field of chlorine leaching of nickel-containing materials and stirring production technology, and relates to a chlorine leaching nickel concentrate production device that improves the chlorine reaction rate. Background Technology

[0002] In the hydrometallurgical workshops of nickel smelters, chlorine leaching of nickel concentrate and other nickel-containing materials is commonly used to supplement nickel and chlorine in the production system. This involves using chlorine leaching to control process conditions such as leaching potential, liquid-solid ratio, and temperature to recover and extract valuable metals such as nickel, copper, and cobalt from the concentrate or copper-containing precipitates. The leaching solution is first sent to the smelting solution for copper removal before entering the production system.

[0003] The existing chlorination nickel concentrate production unit in the hydrometallurgical workshop of a nickel smelter uses a single-machine, single-control device. Chlorine gas is directly inserted into the bottom of the chlorination tank via a straight pipe in a "single-point" manner. A mechanical agitator is installed at the top of the chlorination tank to stir the reaction, ensuring maximum contact and reaction between the material and chlorine gas. Chlorine gas that does not react is directly absorbed by an alkaline tail gas absorption system connected to the top of the chlorination tank. The drawbacks of this technology are poor gas-liquid mixing, increased chlorine consumption, low nickel-containing material output, waste of significant chlorine resources, and high alkaline consumption, increasing product costs and severely limiting production efficiency. Therefore, this invention proposes a chlorination nickel concentrate production unit with improved chlorine reaction rate to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a chlorine leaching nickel concentrate production device that improves the chlorine reaction rate, thus solving the problems of poor gas-liquid mixing effect, large chlorine consumption, and low nickel-containing material output of existing equipment.

[0005] Therefore, the present invention adopts the following technical solution:

[0006] A chlorine leaching nickel concentrate production apparatus for improving chlorine gas reaction rate includes a chlorine leaching tank, wherein a mixture is loaded into the chlorine leaching tank, and a material mixing reaction tube and a mechanical stirring device are inserted into the mixture.

[0007] The material mixing reaction tube is provided with an inlet and a return outlet at both ends, and an outlet in the middle. An inlet control valve and an outlet control valve are provided on both sides of the outlet.

[0008] The chlorine leaching tank is equipped with a circulation pump on its side. The circulation pump has a circulation pump inlet and a circulation pump outlet. The circulation pump inlet is connected to the chlorine leaching tank through a circulation pump feed pipe, and the circulation pump feed pipe is equipped with a pump inlet self-control valve. The circulation pump outlet is connected to the outlet end of the material mixing pipe through a circulation pump discharge pipe, and the circulation pump discharge pipe is equipped with a pump outlet self-control valve.

[0009] The material mixing reaction tube is also equipped with a potential detection device, a chlorine gas drainage pipe, and a steam purging pipe.

[0010] Furthermore, the chlorine mixing reactor includes a chlorine reactor cylinder, a fixed shaft is provided inside the chlorine reactor cylinder, and a number of fan-shaped dispersion plates are provided on the side of the fixed shaft, with both ends connected to the chlorine reactor cylinder through bearing support plates.

[0011] Furthermore, the steam purging pipe is provided with a steam purging pipe protective sleeve, the chlorine gas drainage pipe is provided with a chlorine gas drainage pipe protective sleeve, the potential detection device is provided with a potential detection device protective sleeve, and a potential probe cleaning nozzle is provided on the side.

[0012] Furthermore, the circulating pump is driven by a circulating pump geared motor.

[0013] Furthermore, the chlorination tank is equipped with a solid particulate material inlet and a general liquid material inlet. Solid particulate material is fed into the solid particulate material inlet, and general liquid material is fed into the general liquid material inlet.

[0014] Furthermore, a stirring reduction motor is provided above the mechanical stirring device, and the two are connected in a transmission manner.

[0015] Furthermore, the chlorine gas drainage tube is L-shaped.

[0016] Furthermore, the potential detection device, chlorine gas inlet pipe, steam purging pipe and material mixing reaction pipe are all equipped with connecting flanges at both ends.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention employs a multi-cycle mixing method involving mechanical stirring, chlorine mixing, and pipe-sealed circulation mixing. This results in a more complete chlorine reaction, better mixing effect, significantly improved production efficiency, and reduced environmental pollution from chlorine spills and increased alkali consumption in tail gas treatment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the chlorine reaction cylinder in this utility model.

[0021] In the diagram, 1-chlorine leaching tank, 2-mechanical stirring device, 3-stirring geared motor, 4-solid granular material feed port, 5-solid granular material, 6-ordinary liquid material feed pipe, 7-ordinary liquid material, 8-pump inlet automatic control valve, 9-circulating pump, 10-circulating pump inlet, 11-circulating pump outlet, 12-circulating pump geared motor, 13-circulating pump feed pipe, 14-pump outlet automatic control valve, 15-circulating pump discharge pipe, 16-liquid inlet automatic control valve, 17-liquid outlet automatic control valve, 18-return liquid outlet, 19-material mixing. 20 - Material mixing reaction tube inlet end; 21 - Material mixing tube outlet end; 22 - Steam purging tube; 23 - Steam purging tube protective sleeve; 24 - Chlorine gas drainage tube; 25 - Chlorine gas drainage tube protective sleeve; 26 - Potential detection device; 27 - Potential detection device protective sleeve; 28 - Potential probe cleaning nozzle; 29 - Connecting flange; 30 - Mixed material; 31 - Chlorine gas mixing reactor; 32 - Chlorine gas reactor cylinder; 33 - Fan-shaped dispersion plate; 34 - Fixed shaft; 35 - Bearing support plate. Detailed Implementation

[0022] The technical solution of this utility model will be described below with reference to the accompanying drawings and implementation methods.

[0023] like Figure 1 As shown, a chlorine leaching nickel concentrate production device for improving chlorine reaction rate includes a chlorine leaching tank 1, a mixture 30 is loaded into the chlorine leaching tank 1, and a material mixing reaction tube 19 and a mechanical stirring device 2 are inserted into the mixture 30. A stirring reduction motor 3 is provided above the mechanical stirring device 2, and the two are connected in a transmission manner.

[0024] The material mixing reaction tube 19 has an inlet end 20 and a return outlet 18 at both ends, and an outlet end 21 in the middle. An inlet control valve 16 and an outlet control valve 17 are respectively provided on both sides of the outlet end 21.

[0025] A circulating pump 9 is provided on the side of the chlorination tank 1. The circulating pump 9 is driven by the circulating pump reduction motor 12. The circulating pump 9 is provided with a circulating pump inlet 10 and a circulating pump outlet 11. The circulating pump inlet 10 is connected to the chlorination tank 1 through the circulating pump feed pipe 13, and the circulating pump feed pipe 13 is provided with a pump inlet self-control valve 8. The circulating pump outlet 11 is connected to the material mixing pipe outlet end 21 through the circulating pump discharge pipe 15, and the circulating pump discharge pipe 15 is provided with a pump outlet self-control valve 14.

[0026] The material mixing reaction tube 19 is equipped with a potential detection device 26, a chlorine gas inlet pipe 24, and a steam purging pipe 22. All three are existing technologies, so their working principles and usage will not be described in detail. The chlorine gas inlet pipe 24 is L-shaped and is used to change the airflow direction. In addition, the potential detection device 26, the chlorine gas inlet pipe 24, and the steam purging pipe 22 are all connected to both ends of the material mixing reaction tube 19 through connecting flanges 29.

[0027] The steam purging pipe 22 is provided with a steam purging pipe protective sleeve 23, the chlorine gas drainage pipe 24 is provided with a chlorine gas drainage pipe protective sleeve 25, the potential detection device 26 is provided with a potential detection device protective sleeve 27, and a potential probe cleaning nozzle 28 is provided on the side. The potential probe cleaning nozzle 28 is used to periodically start cleaning the potential detection probe.

[0028] like Figure 2 As shown, the chlorine mixing reactor 31 includes a chlorine reactor cylinder 32. A fixed shaft 34 is provided inside the chlorine reactor cylinder 32. Three fan-shaped dispersion plates 33 are provided on the side of the fixed shaft 34, and both ends are connected to the chlorine reactor cylinder 32 through bearing support plates 35. Specifically, the three fan-shaped dispersion plates 33 are installed in different directions to achieve forward and reverse rotation, which is used to accelerate the dispersion of solid-liquid mixture.

[0029] The chlorine immersion tank 1 is equipped with a solid particulate material feeding port 4 and a general liquid material feeding pipe 6. Solid particulate material 5 is loaded into the solid particulate material feeding port 4, and general liquid material 7 is loaded into the general liquid material feeding pipe 6.

[0030] The usage process of this utility model is as follows:

[0031] First, solid particulate materials 5 such as concentrate and copper-containing precipitate are added into chlorination tank 1 through feed port 4, and ordinary liquid materials 7 such as industrial water are added into chlorination tank 1 through ordinary liquid material feed pipe 6.

[0032] Secondly, when the solid particulate material 5 and the ordinary liquid material 7 are detected to have reached the specified loading value, the feeding is automatically stopped, the mechanical stirring device 2 is started, and the stirring reduction motor 3 is turned on. After repeated circulation stirring by the mechanical stirring device 2, a first mixing reaction is achieved to obtain the mixed material 30. Simultaneously, the pump inlet automatic control valve 8, the pump outlet automatic control valve 14, and the liquid inlet automatic control valve 16 are opened, and the liquid outlet automatic control valve 17 is closed. At this time, the circulation pump motor reducer 12 is turned on, so that the mixed material 30 in the chlorine leaching tank 1 enters the circulation pump outlet pipe 15 through the circulation pump inlet pipe 13, and then enters the material mixing reaction pipe 19 through the circulation pump outlet pipe 15 for pipe-sealed circulation mixing to achieve a second mixing reaction.

[0033] Next, the chlorine gas inlet pipe 24 is opened. Relying on the negative pressure of the pipe, the chlorine gas comes into contact with the mixture 30. The two are fully mixed and reacted again through the three sets of positive and negative combination self-rotating fan-shaped dispersion plates 33 in the chlorine gas mixing reactor 31. The mixture enters the chlorine immersion tank from the material mixing pipe inlet 20, forming a closed circulation chain.

[0034] Finally, when the potential value detected by the potential detection device 26 reaches the specified value, that is, the reaction is complete and nickel-containing material that meets the production requirements is generated, the liquid inlet automatic control valve 16 is closed and the liquid outlet automatic control valve 17 is opened, and the qualified nickel-containing material flows out from the return outlet 18 and enters the next process.

Claims

1. A device for producing nickel concentrate by chlorination with improved chlorine reaction rate, characterized in that, Includes a chlorine immersion tank (1), which is filled with a mixture (30), and the mixture (30) is equipped with a material mixing reaction tube (19) and a mechanical stirring device (2). The material mixing reaction tube (19) is provided with a material mixing reaction tube inlet end (20) and a return liquid outlet (18) at both ends, and a material mixing tube outlet end (21) in the middle. The material mixing tube outlet end (21) is provided with an inlet self-control valve (16) and an outlet self-control valve (17) on both sides. The chlorine immersion tank (1) is equipped with a circulation pump (9) on its side. The circulation pump (9) is equipped with a circulation pump inlet (10) and a circulation pump outlet (11). The circulation pump inlet (10) is connected to the chlorine immersion tank (1) through a circulation pump feed pipe (13), and the circulation pump feed pipe (13) is equipped with a pump inlet self-control valve (8). The circulation pump outlet (11) is connected to the material mixing pipe outlet end (21) through a circulation pump discharge pipe (15), and the circulation pump discharge pipe (15) is equipped with a pump outlet self-control valve (14). The material mixing reaction tube (19) is also equipped with a potential detection device (26), a chlorine gas drainage tube (24) and a steam purging tube (22).

2. The apparatus for producing nickel concentrate by chlorination with improved chlorine reaction rate according to claim 1, characterized in that, It also includes a chlorine mixing reactor (31); The chlorine mixing reactor (31) includes a chlorine reactor cylinder (32), and a fixed shaft (34) is provided inside the chlorine reactor cylinder (32). The fixed shaft (34) has several fan-shaped dispersion plates (33) on its side and is connected to the chlorine reactor cylinder (32) at both ends through bearing support plates (35).

3. The apparatus for producing nickel concentrate by chlorination with improved chlorine reaction rate according to claim 1, characterized in that, The steam purging pipe (22) is provided with a steam purging pipe protective sleeve (23), the chlorine gas drainage pipe (24) is provided with a chlorine gas drainage pipe protective sleeve (25), the potential detection device (26) is provided with a potential detection device protective sleeve (27) and a potential probe cleaning nozzle (28) on the side.

4. The apparatus for producing nickel concentrate by chlorination with improved chlorine reaction rate according to claim 1, characterized in that, The circulating pump (9) is driven by the circulating pump geared motor (12).

5. A nickel concentrate production apparatus for improving chlorine gas reaction rate according to claim 1, characterized in that, The chlorine immersion tank (1) is provided with a solid particulate material feeding port (4) and a general liquid material feeding pipe (6). Solid particulate material (5) is loaded into the solid particulate material feeding port (4), and general liquid material (7) is loaded into the general liquid material feeding pipe (6).

6. The apparatus for producing nickel concentrate by chlorination with improved chlorine reaction rate according to claim 2, characterized in that, The mechanical stirring device (2) is equipped with a stirring reduction motor (3) above it, and the two are connected in a transmission manner.

7. The apparatus for producing nickel concentrate by chlorination with improved chlorine reaction rate according to claim 1, characterized in that, The chlorine gas drainage tube (24) is L-shaped.

8. A nickel leaching concentrate production apparatus for improving chlorine gas reaction rate according to claim 1, characterized in that, The potential detection device (26), chlorine gas drainage pipe (24), steam purging pipe (22) and material mixing reaction pipe (19) are all connected by connecting flanges (29).

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