Nickel-cobalt mineral raw material deep leaching reactor

Abstract

The utility model discloses a nickel-cobalt mineral raw material deep leaching reactor which is characterized in that a jet device and a mixed leaching unit are arranged, a gaseous catalyst is forcibly brought into a negative pressure cavity formed after slurry is pressed into the jet device, meanwhile, the internal negative pressure can effectively prevent the gaseous catalyst from overflowing, and the reactor is environment-friendly; the problem that gas cannot be introduced due to insufficient gas pressure is avoided, multi-stage rapid and sufficient mixing reaction is realized through the jet device, the flow barrier impeller, the mixing impeller and the turbulent flow impeller, nickel-cobalt raw materials and a catalyst are in sufficient contact and have flash reaction, the leaching efficiency of the nickel-cobalt raw materials and the utilization rate of the catalyst are greatly improved, the use cost of the catalyst is reduced, and the cost is reduced. And moreover, the method has good adaptability in the process of leaching nickel and cobalt raw materials by introducing a gaseous catalyst.

Description

Technical Field

[0001] The utility model belongs to the field of reactors, in particular to a nickel-cobalt mineral raw material deep leaching reactor. Background Art

[0002] The nickel-cobalt nonferrous metal leaching and extraction process and equipment have been widely and maturely applied in the hydrometallurgical industry. Traditional leaching equipment is mainly composed of a reactor and an agitator. In the industrial production process, raw materials, sulfuric acid, water, and steam are added to the reactor, and the reaction is continuously mixed by stirring. In the traditional leaching process, the yield of nickel and cobalt valuable metals in the mineral raw materials is low, and the slag contains high nickel and cobalt, which seriously affects the operating efficiency of the enterprise. Therefore, in recent years, the industry has been exploring the addition of reducing catalysts to improve the efficiency of nickel and cobalt metal leaching. However, in the process of industrial promotion of reducing catalysts (gaseous), when the traditional leaching device is introduced into the gaseous catalyst, it is unable to pass due to insufficient gas pressure, and it cannot meet the requirements of effective introduction, efficient utilization, full mixing, and rapid reaction of the gaseous reducing catalyst. At the same time, there is a phenomenon of large-scale catalyst overflow, which affects the working environment. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the defects that the leaching equipment cannot meet the requirements of effective introduction, efficient utilization, full mixing and rapid reaction of gaseous reducing catalysts, and there is a large amount of catalyst overflow, the utility model provides a nickel-cobalt mineral raw material deep leaching reactor to make up for the above defects.

[0004] The technical scheme adopted by the utility model is as follows: a nickel-cobalt mineral raw material deep leaching reactor, comprising an ejector and a mixed leaching unit, wherein the ejector is sequentially provided with an inlet outer cylinder section, a contraction section, a throat, and a conical diffusion section, an inlet inner cylinder section is arranged inside the inlet outer cylinder section, a conical contraction section is arranged at the end of the inlet inner cylinder section, a negative pressure chamber is formed between the inlet outer cylinder section and the inlet inner cylinder section, one end of the inlet inner cylinder section away from the conical contraction section is a liquid inlet, a gaseous catalyst introduction interface is arranged on the inlet outer cylinder section, a jet barrier impeller is arranged inside the conical diffusion section, the mixed leaching unit comprises a mixed leaching cylinder body and a mixing impeller and a turbulent impeller arranged inside the mixed leaching cylinder body, an overflow outlet is arranged on the mixed leaching cylinder body, the lower end of the mixed leaching cylinder body is connected to the conical diffusion section, a cover is arranged on the upper end of the mixed leaching cylinder body, the jet barrier impeller, the mixing impeller and the turbulent impeller are all arranged on a stirring shaft, and the upper end of the stirring shaft passes through the cover to connect to a power system.

[0005] A further technical solution is that the inlet inner barrel section and the inlet inner barrel section are connected to a first flange together, the first flange is connected to a propeller, the propeller includes a propeller barrel and a propulsion turbine located inside the propeller barrel, a slurry inlet is arranged on the propeller barrel, the end of the propeller barrel is connected to the first flange and the propeller barrel is connected to the inlet inner barrel section, a fixed stirring shaft positioning frame is arranged at the other end of the propeller barrel, the end of the stirring shaft is rotatably connected to the stirring shaft positioning frame, and the propulsion turbine is arranged on the stirring shaft.

[0006] A further technical solution is that the cross-sectional area of ​​the ejector conical contraction section is ≤ 50% of the cross-sectional area of ​​the ejector inlet inner cylinder section.

[0007] A further technical solution is that the jet barrier flow impeller is formed by N groups of barrier flow blade groups uniformly distributed along the axial direction, each barrier flow blade group includes a plurality of blades, and the angle between the blades and the stirring shaft is 45°.

[0008] A further technical solution is that the propulsion turbine, the jet barrier impeller, the mixing impeller and the stirring shaft are all connected by threaded pins.

[0009] A further technical solution is that the materials of the stirring shaft positioning frame, the propeller cylinder, the slurry inlet, the ejector, the mixed leaching cylinder, and the overflow outlet are all CPVC.

[0010] A further technical solution is that the propulsion turbine, the jet barrier impeller, the mixing impeller, the turbulent impeller, the threaded pin and the stirring shaft are all made of C22 alloy.

[0011] A further technical solution is that the stirring shaft and the stirring shaft positioning frame 1 are assembled through a sleeve, and the sleeve is made of polytetrafluoroethylene.

[0012] A further technical solution is that the slurry inlet, the gaseous catalyst introduction interface and the overflow outlet are all flange short sections.

[0013] A further technical solution is that the power system includes a bracket, a motor, a reducer, and a bearing seat. The motor is fixed to the bracket, the output shaft of the motor is connected to the reducer, the output shaft of the reducer is connected to the stirring shaft through a coupling, the bearing seat is fixed to the bracket, and the stirring shaft is rotatably connected to the bearing seat.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] By setting up an ejector and a mixed leaching unit, the negative pressure chamber formed after the slurry is forced into the ejector can realize the forced introduction of the gaseous catalyst. At the same time, the internal negative pressure can effectively prevent the gaseous catalyst from overflowing, which is environmentally friendly. There will be no problem of being unable to pass due to insufficient gas pressure. The ejector and the barrier flow impeller, the mixing impeller and the turbulence impeller can realize multi-stage rapid and sufficient mixing reaction, so that the nickel-cobalt raw materials are fully in contact with the catalyst and react at a flash speed, which greatly improves the leaching efficiency of the nickel-cobalt raw materials and the utilization rate of the catalyst, reduces the cost of the catalyst, has significant economic benefits, and has good adaptability in the process of introducing the gaseous catalyst for leaching the nickel-cobalt raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the ejector of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the barrier flow impeller of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the mixed leaching unit of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the mixing impeller of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the turbulent impeller of the utility model;

[0022] Figure 7 It is a structural schematic diagram of the power system of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the propeller of the utility model;

[0024] Fig. 9 It is a structural schematic diagram of the stirring shaft positioning frame of the utility model;

[0025] Fig.10 yes Fig. 9 Schematic diagram of the top view of the stirring shaft positioning frame in the shown state. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1-Figure 10A deep leaching reactor for nickel-cobalt mineral raw materials comprises an ejector 3 and a mixed leaching unit 5, wherein the ejector 3 is provided with an inlet outer cylinder section 3-1, a contraction section, a throat 3-6, and a conical diffusion section 3-7 in sequence, an inlet inner cylinder section 3-2 is provided inside the inlet outer cylinder section 3-1, a conical contraction section 3-3 is provided at the end of the inlet inner cylinder section 3-2, a negative pressure chamber 3-4 is formed between the inlet outer cylinder section 3-1 and the inlet inner cylinder section 3-2, an end of the inlet inner cylinder section 3-2 away from the conical contraction section 3-3 is a liquid inlet, a gaseous catalyst introduction interface 3-5 is provided on the inlet outer cylinder section 3-1, a jet barrier impeller 4 is provided inside the conical diffusion section 3-7, and the mixed leaching unit 5 comprises a mixed leaching cylinder 5-1 and a mixing impeller 5-2 and a turbulent impeller 5-3 provided inside the mixed leaching cylinder 5-1, and an overflow outlet 6 is provided on the mixed leaching cylinder 5-1 The lower end of the mixed leaching cylinder 5-1 is connected to the conical diffusion section 3-7, and the upper end of the mixed leaching cylinder 5-1 is provided with a cover 8. The jet barrier impeller 4, the mixing impeller 5-2 and the turbulent impeller 5-3 are all arranged on the stirring shaft 7-6, and the upper end of the stirring shaft 7-6 passes through the cover and is connected to the power system 7.

[0028] When in use, the slurried nickel-cobalt raw material slurry is pressed into the ejector 3 from the liquid inlet. When the slurry enters the conical contraction section 3-3 of the ejector 3, the flow cross-sectional area is greatly reduced, the slurry flow rate increases, and a negative pressure (Venturi effect) is formed nearby, that is, a negative pressure chamber 3-4 is formed between the inlet outer cylinder section 3-1 and the inlet inner cylinder section 3-2. At this time, the low-pressure gaseous catalyst in the gaseous catalyst introduction interface 3-5 is forced to be sucked into the slurry. The catalyst and slurry mixture enters the conical diffusion section 3-7 through the throat 3-6 of the ejector 3, and is sprayed and diffused to the jet barrier impeller 4, where collision and mixing occur. Then the mixed slurry enters the mixed leaching unit 5, and is further mixed and stirred by the mixing impeller 5-2 and the turbulent impeller 5-3. The fully reacted slurry enters the slurry kettle from the overflow outlet 6, and the slurry inside the slurry kettle continues to enter the nickel-cobalt mineral raw material deep leaching reactor from the slurry inlet 2-3. This cycle is repeated to promote the full and efficient mixing reaction of the slurry and the gaseous catalyst. The utility model is applicable to the field of nickel-cobalt mineral raw material leaching, and has the effect of forcibly inhaling low-pressure reducing gas and spraying flash reaction on the mixture. The innovative application of the nickel-cobalt mineral raw material deep leaching reactor technically improves the structural form and working principle of the traditional leaching device, and effectively solves the problem that the traditional leaching device cannot be introduced due to insufficient gas pressure when the gaseous catalyst is introduced, and realizes the full contact and flash reaction between the nickel-cobalt raw material and the catalyst, and improves the leaching efficiency. At the same time, the internal negative pressure structure design can effectively prevent the gaseous catalyst from overflowing, which is environmentally friendly.

[0029] The inlet inner barrel section 3-2 is connected to the first flange together with the inlet inner barrel section 3-2, and the first flange is connected to the propeller 2. The propeller 2 includes a propeller barrel 2-1 and a propulsion turbine 2-2 located inside the propeller barrel 2-1. A slurry inlet 2-3 is arranged on the propeller barrel 2-1, and the end of the propeller barrel 2-1 is connected to the first flange and the propeller barrel 2-1 is connected to the inlet inner barrel section 3-2. A fixed stirring shaft 7-6 positioning frame 1 is arranged at the other end of the propeller barrel 2-1, and the end of the stirring shaft 7-6 is rotatably connected to the stirring shaft 7-6 positioning frame 1, and the propulsion turbine 2-2 is arranged on the stirring shaft 7-6.

[0030] When the slurry is passed into the slurry inlet 2-3 and the power system 7 drives the stirring shaft 7-6 to rotate, the propulsion turbine 2-2 lifts the slurry into the ejector 3. Flanges are provided at both the upper and lower ends of the propeller cylinder 2-1 for connecting the first flange and the stirring shaft 7-6 positioning frame 1 respectively. The stirring shaft 7-6 positioning frame 1 also has the function of sealing the lower end of the propeller cylinder 2-1.

[0031] The cross-sectional area of ​​the conical contraction section 3-3 of the ejector 3 is ≈50% of the cross-sectional area of ​​the inner cylinder section 3-2 at the inlet of the ejector 3. This can not only ensure the generation of the Venturi effect, promote the formation of negative pressure in the negative pressure chamber 3-4, but also balance the flow rate of the inner cylinder section 3-2.

[0032] The jet barrier flow impeller 4 is formed by N groups of barrier flow blades evenly distributed along the axial direction. Each barrier flow blade group includes multiple blades. The angle between the blades and the stirring shaft 7-6 is about 45°, which ensures efficient collision and mixing between the jet barrier flow impeller 4 and the slurry, while avoiding too small flow rate of the ejector 3 in this area.

[0033] The connection modes of the propulsion turbine 2-2, the jet barrier flow impeller 4, the mixing impeller 5-2 and the stirring shaft 7-6 are all threaded pin connections, so that the propulsion turbine 2-2, the jet barrier flow impeller 4, the mixing impeller 5-2 and the stirring shaft 7-6 can be fixedly connected. The turbulence impeller 5-3 is composed of an inner ring, an outer ring and turbulence blades, and the angle between the blades and the inner and outer rings is 45°. The stirring shaft 7-6 only passes through the inner ring of the turbulence impeller 5-3 and there is no connection between the two. The turbulence impeller 5-3 only needs to be fixed inside the mixed leaching cylinder 5-1. The mixed leaching cylinder 5-1 can be divided into an upper and lower cylinder, and the upper and lower cylinders are connected by flanges. The first clamping ring is fixed in the upper cylinder, and the second clamping ring is fixed in the lower cylinder. The turbulence impeller 5-3 is located between the first clamping ring and the second clamping ring, so that the turbulence impeller 5-3 is fixed. The blades in the turbulence impeller 5-3 can change the flow direction of the paddle liquid and increase the mixing effect.

[0034] The materials of the stirring shaft 7-6, the positioning frame 1, the propeller cylinder 2-1, the slurry inlet 2-3, the ejector 3, the mixed leaching cylinder 5-1, and the overflow outlet 6 are all CPVC, which has good corrosion resistance.

[0035] The propulsion turbine 2-2, the jet barrier impeller 4, the mixing impeller 5-2, the turbulent impeller 5-3, the threaded pin, and the stirring shaft 7-6 are all made of C22 alloy.

[0036] The stirring shaft 7-67-6 and the stirring shaft 7-6 positioning frame 11 are assembled through a sleeve, and the sleeve is made of polytetrafluoroethylene.

[0037] The slurry inlet 2-3, the gaseous catalyst introduction interface 3-5, and the overflow outlet 6 are all flange short sections, which are convenient for connecting the slurry supply pipeline and the gaseous catalyst pipeline.

[0038] The power system 7 includes a bracket 9, a motor 7-1, a reducer 7-2, and a bearing seat 7-4. The motor 7-1 is fixed to the bracket, the output shaft of the motor 7-1 is connected to the reducer 7-2, the output shaft of the reducer 7-2 is connected to the stirring shaft 7-6 through a coupling 7-3, the bearing seat 7-4 is fixed to the bracket, the stirring shaft 7-6 is rotatably connected to the bearing seat 7-4, the stirring shaft 7-6 passes through the cover 8 and a seal 7-5 is set at the connection, and the seal 7-5 is a labyrinth seal.

[0039] The above are only preferred embodiments of the present invention.

Claims

1. A nickel-cobalt mineral raw material deep leaching reactor, characterized in that: The invention comprises an ejector and a mixed leaching unit. The ejector (3) is provided with an inlet outer cylinder section (3-1), a contraction section, a throat (3-6), and a conical diffusion section (3-7) in sequence. An inlet inner cylinder section (3-2) is provided inside the inlet outer cylinder section (3-1). A conical contraction section (3-3) is provided at the end of the inlet inner cylinder section (3-2). A negative pressure chamber (3-4) is formed between the inlet outer cylinder section (3-1) and the inlet inner cylinder section (3-2). One end of the inlet inner cylinder section (3-2) away from the conical contraction section (3-3) is a liquid inlet. A gaseous catalyst introduction interface (3-5) is provided on the inlet outer cylinder section (3-1). The conical diffusion section (3-2) is provided with a gaseous catalyst introduction interface (3-5). 7) a jet barrier impeller (4) is arranged inside the mixing leaching unit, the mixing leaching unit comprises a mixing leaching cylinder (5-1) and a mixing impeller (5-2) and a turbulent impeller (5-3) arranged inside the mixing leaching cylinder (5-1), an overflow outlet (6) is arranged on the mixing leaching cylinder (5-1), the lower end of the mixing leaching cylinder (5-1) is connected to the conical diffusion section (3-7), and a cover is arranged on the upper end of the mixing leaching cylinder (5-1), the jet barrier impeller (4), the mixing impeller (5-2) and the turbulent impeller (5-3) are all arranged on the stirring shaft (7-6), and the upper end of the stirring shaft (7-6) passes through the cover and is connected to the power system (7).

2. A nickel-cobalt mineral raw material deep leaching reactor according to claim 1, characterized in that: The inlet inner barrel section (3-2) and the inlet inner barrel section (3-2) are connected to a first flange, the first flange is connected to a propeller (2), the propeller (2) comprises a propeller barrel (2-1) and a propulsion turbine (2-2) located inside the propeller barrel (2-1), a slurry inlet (2-3) is arranged on the propeller barrel (2-1), the end of the propeller barrel (2-1) is connected to the first flange and the propeller barrel (2-1) is connected to the inlet inner barrel section (3-2), a fixed stirring shaft positioning frame (1) is arranged at the other end of the propeller barrel (2-1), the end of the stirring shaft (7-6) is rotatably connected to the stirring shaft positioning frame (1), and the propulsion turbine (2-2) is arranged on the stirring shaft (7-6).

3. A nickel-cobalt mineral raw material deep leaching reactor according to claim 1, characterized in that: The cross-sectional area of ​​the ejector conical contraction section (3-3) is ≤ 50% of the cross-sectional area of ​​the ejector inlet inner cylinder section (3-2).

4. A nickel-cobalt mineral raw material deep leaching reactor according to claim 1, characterized in that: The jet barrier flow impeller (4) is formed by N groups of barrier flow blade groups evenly distributed along the axial direction, each barrier flow blade group includes a plurality of blades, and the angle between the blades and the stirring shaft is 45 degrees.

5. A nickel-cobalt mineral raw material deep leaching reactor according to claim 2, characterized in that: The propulsion turbine (2-2), the jet barrier impeller (4), the mixing impeller (5-2) and the stirring shaft (7-6) are all connected by threaded pins.

6. A nickel-cobalt mineral raw material deep leaching reactor according to claim 2, characterized in that: The materials of the stirring shaft positioning frame (1), the propeller cylinder (2-1), the slurry inlet (2-3), the ejector (3), the mixed leaching cylinder (5-1), and the overflow outlet (6) are all CPVC.

7. A nickel-cobalt mineral raw material deep leaching reactor according to claim 2, characterized in that: The propulsion turbine (2-2), the jet barrier impeller (4), the mixing impeller (5-2), the turbulent impeller (5-3), the threaded pin, and the stirring shaft (7-6) are all made of C22 alloy.

8. A nickel-cobalt mineral raw material deep leaching reactor according to claim 2, characterized in that: The stirring shaft (7-6) and the stirring shaft positioning frame (1) are assembled via a shaft sleeve, and the shaft sleeve is made of polytetrafluoroethylene.

9. A nickel-cobalt mineral raw material deep leaching reactor according to claim 2, characterized in that: The slurry inlet (2-3), the gaseous catalyst introduction interface (3-5), and the overflow outlet (6) are all flange short sections.

10. A nickel-cobalt mineral raw material deep leaching reactor according to claim 1, characterized in that: The power system (7) comprises a bracket, a motor (7-1), a reducer (7-2), and a bearing seat (7-4); the motor (7-1) is fixed to the bracket; the output shaft of the motor (7-1) is connected to the reducer (7-2); the output shaft of the reducer (7-2) is connected to the stirring shaft (7-6) via a coupling (7-3); the bearing seat (7-4) is fixed to the bracket; and the stirring shaft (7-6) is rotationally connected to the bearing seat (7-4).

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