A device for oxygen leaching in a mixing center of high-grade nickel matte slurry.

Abstract

This utility model discloses a device for oxygen leaching of high-grade nickel matte slurry in a stirring center. It includes a leaching tank, a stirring mechanism, and a ventilation mechanism. The leaching tank has a feed inlet and an exhaust outlet at the top, and a discharge outlet at the bottom. The stirring mechanism includes a motor, a reducer, a stirring shaft, and stirring blades. The motor is connected to the stirring shaft via the reducer. The stirring shaft is vertically positioned at the center of the leaching tank. The stirring blades are turbine-type blades mounted on the stirring shaft. A through-hole ventilation chamber is provided within the stirring shaft and stirring blades. The ventilation mechanism includes an oxygen tank and a ventilation pipe connected to the oxygen tank. The ventilation pipe is connected to the ventilation chamber inside the stirring shaft. An exhaust port is provided at the end of the stirring blades. This utility model improves oxygen utilization, increases leaching efficiency, and enhances stirring effect. It has a simple structure, is easy to operate, and is readily automated.

Description

Technical Field

[0001] This utility model belongs to the field of hydrometallurgical technology, specifically relating to a device for oxygen leaching in the mixing center of high nickel matte ore slurry. Background Technology

[0002] High-grade nickel matte is an intermediate product in nickel smelting and is typically treated with hydrometallurgical leaching processes to extract valuable metals such as nickel, copper, and cobalt. Traditional leaching processes often employ mechanically stirred tanks, using agitation to ensure thorough contact between the slurry and the leaching agent, while simultaneously introducing air or oxygen for oxidative leaching. However, these traditional processes have the following drawbacks:

[0003] 1. Low oxygen utilization: In traditional mixing tanks, oxygen is introduced from the side wall or bottom of the tank. The bubbles are relatively large, resulting in a small contact area with the slurry and a short residence time, which leads to low oxygen utilization and increases production costs.

[0004] 2. Low leaching efficiency: Due to low oxygen utilization, the leaching reaction rate is slow, the leaching time is long, and the leaching efficiency is low.

[0005] 3. Poor mixing effect: The design of the mixing blades in traditional mixing tanks is unreasonable, which can easily cause the slurry to settle and affect the leaching effect. Utility Model Content

[0006] To address the aforementioned problems, this invention provides an oxygen-assisted leaching device for a mixing center of high-grade nickel matte slurry, thereby solving the problems of low oxygen utilization, low leaching efficiency, and poor mixing effect in the prior art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An apparatus for oxygen leaching of high-grade nickel matte slurry with a stirring center includes a leaching tank, a stirring mechanism, and a ventilation mechanism. The leaching tank has a feed inlet and an exhaust outlet at the top and a discharge outlet at the bottom. The stirring mechanism includes a motor, a reducer, a stirring shaft, and stirring blades. The motor is connected to the stirring shaft via the reducer. The stirring shaft is vertically positioned at the center of the leaching tank. The stirring blades are turbine-type stirring blades mounted on the stirring shaft. A through-ventilation cavity is provided inside the stirring shaft and the stirring blades. The ventilation mechanism includes an oxygen tank and a ventilation pipe connected to the oxygen tank. The ventilation pipe is connected to the ventilation cavity inside the stirring shaft. An exhaust port is provided at the end of the stirring blades.

[0009] In a further technical solution, the leaching tank is cylindrical with a conical bottom.

[0010] In a further technical solution, a pressure reducing valve and a flow meter are installed on the vent pipe.

[0011] In a further technical solution, the number of stirring blades is two sets, which are respectively set at the bottom and middle of the stirring shaft.

[0012] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0013] 1. Improved oxygen utilization: This invention adopts a central oxygenation method, in which oxygen is ejected from the air outlet on the stirring blade, forming microbubbles, which increases the contact area between oxygen and slurry, prolongs the residence time of oxygen in slurry, and improves oxygen utilization.

[0014] 2. Improve leaching efficiency: Due to the increased oxygen utilization, the leaching reaction rate is accelerated, the leaching time is shortened, and the leaching efficiency is improved.

[0015] 3. Improved stirring effect: This utility model adopts multi-layer turbine-type stirring blades, which have high stirring intensity, uniform mixing of slurry, and are not prone to sedimentation, thus improving the leaching effect.

[0016] 4. Simple structure and easy operation: This utility model has a simple structure, is easy to operate, and is easy to automate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] In the diagram: 1. Leaching tank; 11. Feed inlet; 12. Exhaust outlet; 13. Discharge outlet; 2. Stirring mechanism; 21. Motor; 22. Reducer; 23. Stirring shaft; 24. Stirring blades; 25. Vent; 3. Ventilation mechanism; 31. Oxygen tank; 32. Ventilation pipe; 33. Pressure reducing valve; 34. Flow meter. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] like Figure 1 As shown, the present invention provides an oxygen leaching device for a stirring center of high nickel matte ore slurry, comprising a leaching tank 1, a stirring mechanism 2, and an aeration mechanism 3.

[0021] The leaching tank 1 is provided with a feed inlet 11 and an exhaust outlet 12 at the top. The leaching tank 1 is cylindrical and conical at the bottom, with a discharge outlet 13 at the bottom.

[0022] The stirring mechanism 2 includes a motor 21, a reducer 22, a stirring shaft 23, and stirring blades 24. The motor 21 is connected to the stirring shaft 23 through the reducer 22. The stirring shaft 23 is vertically arranged in the center of the leaching tank 1. The stirring blades 24 are multi-layer turbine-type stirring blades and are arranged on the stirring shaft 23. A through-ventilation cavity is provided in the stirring shaft 23 and the stirring blades 24. An air outlet 25 is provided at the end of the stirring blades 24.

[0023] The ventilation mechanism 3 includes an oxygen tank 31 and a ventilation pipe 32 connected to the oxygen tank 31. The ventilation pipe 32 is connected to the ventilation cavity inside the stirring shaft 23. A pressure reducing valve 33 and a flow meter 34 are provided on the ventilation pipe 32.

[0024] Preferably, there are two sets of stirring blades 24, which are respectively set at the bottom and middle of the stirring shaft 23.

[0025] Working principle:

[0026] High-grade nickel matte ore slurry and leaching agent are added to leaching tank 1 through feed inlet 11. The stirring mechanism 2 is started, and the valve of oxygen tank 31 is opened simultaneously. Oxygen enters the vent pipe 32 through pressure reducing valve 33 and flow meter 34, and is ejected from the vent hole 25 on the stirring blade 24, forming microbubbles that fully contact the ore slurry for oxidation leaching. After leaching is complete, the leaching solution is discharged from discharge port 13.

[0027] It should be noted that, since the upper end of the stirring shaft 23 of this device needs to be connected to the air pipe 32, the motor 21 and the reducer 22 are eccentrically positioned relative to the stirring shaft 23 to facilitate the introduction of oxygen into the stirring shaft 23. Figure 1 As shown, a gearbox is installed between the reducer 22 and the stirring shaft 23, and transmission is achieved through a gear structure. The reducer 22 serves as a conventional motor speed reducer. The motor 21 transmits power to the stirring shaft 23 via the gear structure through the reducer 22, driving the stirring shaft 23 to rotate. The above driving method is prior art, and details will not be elaborated further. Other prior art structures that can achieve this function are also applicable to this patent.

[0028] Furthermore, regarding the connection between the vent pipe 32 and the stirring shaft 23, the stirring shaft 23 can rotate while the vent pipe 32 does not rotate. This can be achieved by setting a flange bearing inside the stirring shaft 23. The oxygen vent pipe 32 is sealed to the intermediate bearing, and the intermediate flange remains stationary for 360 degrees. Then, when the stirring shaft 23 rotates, the flange interface remains stationary relative to the stirring shaft 23, thus achieving the above function. Other existing structures that can achieve this function are also applicable to this patent.

[0029] In addition, a water seal can be installed at the connection between the vent pipe 32 and the stirring shaft 23 to prevent gas from escaping.

[0030] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An apparatus for oxygen pressure leaching of a high-ice nickel ore slurry in an agitated vessel, characterised in that, The leaching tank (1), stirring mechanism (2), and aeration mechanism (3) are included. The top of the leaching tank (1) is provided with a feed inlet (11) and an exhaust outlet (12), and the bottom is provided with a discharge outlet (13). The stirring mechanism (2) includes a motor (21), a reducer (22), a stirring shaft (23), and stirring blades (24). The motor (21) is connected to the stirring shaft (23) through the reducer (22), and the stirring shaft (23) is vertically arranged in the leaching tank (1). The stirring blade (24) is a turbine-type stirring blade, which is mounted on the stirring shaft (23). A through-ventilation cavity is provided inside the stirring shaft (23) and the stirring blade (24). The ventilation mechanism (3) includes an oxygen tank (31) and a ventilation pipe (32) connected to the oxygen tank (31). The ventilation pipe (32) is connected to the ventilation cavity inside the stirring shaft (23). An air outlet (25) is provided at the end of the stirring blade (24).

2. A device for oxygen injection into the center of a stirred high-ice nickel ore slurry leaching according to claim 1, characterized in that, The leaching tank (1) is cylindrical with a conical bottom.

3. A device for oxygen injection into the center of a stirred high-ice nickel ore slurry according to claim 1, characterized in that, The vent pipe (32) is equipped with a pressure reducing valve (33) and a flow meter (34).

4. A device for oxygen injection into the center of a stirred high-ice nickel ore slurry according to claim 1, characterized in that, The number of stirring blades (24) is two sets, which are respectively set at the bottom and middle of the stirring shaft (23).

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