Oxygen pipe for introducing oxygen at top of autoclave and gas distribution device

Abstract

The utility model provides an oxygen pipe and gas distribution device for introducing oxygen at the top of an autoclave, which comprises the autoclave, the autoclave is horizontal and is divided into a first compartment, a second compartment, a third compartment and a fourth compartment according to the flow direction of a leaching medium, a stirrer is vertically arranged at the middle position of each compartment, and the other end of each compartment is provided with a gas inlet. A gas distribution ring is concentrically arranged below each stirrer, and a first oxygen pipe, a second oxygen pipe, a third oxygen pipe and a fourth oxygen pipe are sequentially arranged in the corresponding four compartments. The oxygen pipe can be individually designed according to the reaction degrees of different compartments of the autoclave, oxygen is introduced to be in contact with the oxygen distributor, so that the oxygen is uniformly distributed, the blocking frequency of the oxygen pipe is reduced, and the oxygen utilization rate and the autoclave operation rate are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrometallurgy equipment, and relates to an oxygen pipe and a gas distribution device for oxygen supply at the top of a pressure autoclave. Background Art

[0002] During the pressure oxygen leaching process of non-ferrous metals such as nickel and cobalt, the pressure autoclave often has problems such as low oxygen utilization rate, low leaching rate, incomplete hematite formation, and easy blockage of the oxygen pipe. How to improve the oxygen distribution effect in the pressure autoclave, increase the oxygen utilization rate and the leaching rate of valuable metals such as nickel and cobalt, make the hematite formation more complete, and the oxygen pipe not easily blocked is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an oxygen pipe and a gas distribution device for oxygen supply at the top of a pressure autoclave in view of the problems existing in the prior art, and solve the problems of low oxygen utilization rate and easy blockage of the oxygen pipe in the existing pressure autoclave.

[0004] Therefore, the utility model adopts the following technical solutions:

[0005] An oxygen pipe and a gas distribution device for oxygen supply at the top of a pressure autoclave, characterized in that: it includes a pressure autoclave, the pressure autoclave is horizontal, and the first, second, third, and fourth compartments are divided by a partition wall according to the flow direction of the leaching medium. A stirrer is vertically arranged at the middle position of each compartment. The first compartment is provided with a first oxygen pipe and a first gas distribution ring, the second compartment is provided with a second oxygen pipe and a second gas distribution ring, the third compartment is provided with a third oxygen pipe and a third gas distribution ring, and the fourth compartment is provided with a fourth oxygen pipe and a fourth gas distribution ring.

[0006] Further, the first oxygen pipe and the second oxygen pipe have the same diameter, the third oxygen pipe and the fourth oxygen pipe have the same diameter, and the diameter of the first oxygen pipe is larger than that of the third oxygen pipe.

[0007] Further, the stirrer is any one or a combination of a disk turbine stirrer, a paddle stirrer, and a propeller stirrer.

[0008] Further, the first gas distribution ring, the second gas distribution ring, the third gas distribution ring, and the fourth gas distribution ring are all cylindrical, the diameter of which is equal to or smaller than the diameter of the impeller of the corresponding compartment stirrer, and legs are provided at the bottom, and they are concentrically arranged directly below the corresponding compartment stirrer through the legs and fixedly connected to the autoclave body, and the lower edge is higher than the inner wall of the pressure autoclave.

[0009] Further, oxygen pipe holes are provided on both the first gas distribution ring and the second gas distribution ring. A first pipe support is provided in the oxygen pipe hole, and a first U-shaped pipe clamp is provided on the first pipe support. Second pipe supports are provided at the upper edges of the outer sides of the third gas distribution ring and the fourth gas distribution ring, and second U-shaped pipe clamps are provided on the second pipe supports.

[0010] Further, the first oxygen pipe is in a 90° arc shape near the first gas distribution ring, penetrates into the first gas distribution ring from the oxygen pipe hole towards the center line of the first gas distribution ring, with a penetration depth of 10 - 20 mm. The pipe orifice has a vertical cross-section and is fixed on the first gas distribution ring through the first pipe support and the first U-shaped pipe clamp. The arc radius of the first oxygen pipe is equal to the horizontal distance from the straight section of the first oxygen pipe to the oxygen pipe hole; the second oxygen pipe is arranged in the same way as the first oxygen pipe.

[0011] Further, the third oxygen pipe is at 135° near the third gas distribution ring, its bend is towards the center line of the third gas distribution ring, with a penetration depth of 10 - 20 mm. The pipe orifice has a 45° cross-section and is fixed on the third gas distribution ring through the second pipe support and the second U-shaped pipe clamp; the fourth oxygen pipe is arranged in the same way as the third oxygen pipe (4c).

[0012] In addition, the autoclave can be divided into four or more compartments according to the flow direction of the leaching medium. The additional compartment is located between the second compartment and the third compartment, and its oxygen pipe and gas distribution device are configured in the same way as those in the first compartment.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The present utility model can perform personalized design on the oxygen pipes in different compartments of the autoclave, realizing uniform distribution of oxygen, reducing the frequency of oxygen pipe blockage, and improving the oxygen utilization rate and the operation rate of the autoclave. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic connection structural diagram of the first oxygen pipe and the first gas distribution ring in the present utility model;

[0017] Figure 3 is a schematic connection structural diagram of the third oxygen pipe and the third gas distribution ring in the present utility model.

[0018] In the figure, 1 - autoclave, 2 - partition board, 3 - stirrer, 4a - first oxygen pipe, 4b - second oxygen pipe, 4c - third oxygen pipe, 4d - fourth oxygen pipe, 5a - first gas distribution ring, 5b - second gas distribution ring, 5c - third gas distribution ring, 5d - fourth gas distribution ring, 6 - support leg, 7 - oxygen pipe hole, 8a - first pipe support, 8b - second pipe support, 9a - first U-shaped pipe clamp, 9b - second U-shaped pipe clamp. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] As Figure 1 shown, an oxygen pipe and a gas distribution device for oxygen supply at the top of an autoclave include an autoclave 1. The autoclave 1 is horizontal and is divided into four compartments, namely the first, second, third, and fourth compartments, by a partition wall 2 according to the flow direction of the leaching medium. A stirrer 3 is vertically arranged at the middle position of each compartment. The first compartment is provided with a first oxygen pipe 4a and a first gas distribution ring 5a, the second compartment is provided with a second oxygen pipe 4b and a second gas distribution ring 5b, the third compartment is provided with a third oxygen pipe 4c and a third gas distribution ring 5c, and the fourth compartment is provided with a fourth oxygen pipe 4d and a fourth gas distribution ring 5d.

[0021] The first oxygen pipe 4a and the second oxygen pipe 4b have the same pipe diameter, the third oxygen pipe 4c and the fourth oxygen pipe 4d have the same pipe diameter, and the pipe diameter of the first oxygen pipe 4a is larger than that of the third oxygen pipe 4c.

[0022] The stirrer 3 is any one or a combination of a disk turbine stirrer, a paddle stirrer, and a propeller stirrer.

[0023] The first gas distribution ring 5a, the second gas distribution ring 5b, the third gas distribution ring 5c, and the fourth gas distribution ring 5d are all cylindrical, and their diameters are equal to or smaller than the blade diameter of the stirrer 3 in the corresponding compartment. Legs 6 are provided at the bottoms of the first gas distribution ring 5a, the second gas distribution ring 5b, the third gas distribution ring 5c, and the fourth gas distribution ring 5d, and they are concentrically arranged directly below the stirrer 3 in the corresponding compartment through the legs 6 and are fixedly connected to the body of the autoclave 1, and the lower edge is higher than the inner wall of the autoclave 1.

[0024] Oxygen pipe holes 7 are provided on both the first gas distribution ring 5a and the second gas distribution ring 5b. A first pipe support 8a is provided in the oxygen pipe hole 7, and a first U-shaped pipe clamp 9a is provided on the first pipe support 8a; second pipe supports 8b are provided at the upper outer edges of the third gas distribution ring 5c and the fourth gas distribution ring 5d, and second U-shaped pipe clamps 9b are provided on the second pipe supports 8b.

[0025] The first oxygen pipe 4a is in a 90° arc shape near the first gas distribution ring 5a, penetrates into the first gas distribution ring 5a from the oxygen pipe hole 7 towards the center line of the first gas distribution ring 5a, and the penetration depth is 10 - 20 mm. The pipe orifice has a vertical cross-section and is fixed on the first gas distribution ring 5a through the first pipe support 8a and the first U-shaped pipe clamp 9a. The arc radius of the first oxygen pipe 4a is equal to the horizontal distance from the straight section of the first oxygen pipe 4a to the oxygen pipe hole 7; the arrangement of the second oxygen pipe 4b is the same as that of the first oxygen pipe 4a.

[0026] The third oxygen pipe 4c is 135° near the third air distribution ring 5c, and is bent toward the center line of the third air distribution ring 5c. The penetration depth is 10-20mm, and the pipe mouth is a 45° cross-section. It is fixed on the third air distribution ring 5c by the second pipe support 8b and the second U-shaped pipe clamp 9b; the layout of the fourth oxygen pipe 4d is the same as the third oxygen pipe 4c.

[0027] In actual production applications, the autoclave 1 can be divided into four or more compartments according to the flow direction of the leaching medium. For the autoclave 1 with more than four compartments, the oxygen pipes and gas distribution devices of the two terminal compartments are configured the same as those of the third compartment, and the oxygen pipes and gas distribution devices of the remaining compartments are configured the same as those of the first compartment.

[0028] The use process of this utility model is as follows:

[0029] When different compartments of the autoclave 1 are filled with slurry and meet the oxygen pressure leaching conditions, oxygen is introduced into the first oxygen pipe 4a, the second oxygen pipe 4b, the third oxygen pipe 4c, and the fourth oxygen pipe 4d in sequence. At this time, the slurry leaching in the first compartment and the second compartment is incomplete, the oxygen consumption is large, and the viscosity is small. The larger diameters of the first oxygen pipe 4a and the second oxygen pipe 4b are conducive to ensuring that a larger amount of oxygen is introduced. The oxygen ejected from the first oxygen pipe 4a vertically rushes to the inner wall of the first air distribution ring 5a opposite, and is distributed circumferentially along the inner wall of the first air distribution ring 5a, and the axial flow The ore slurry is mixed, and the shear force of the stirrer 3 forms a uniform mixture of gas, liquid and solid phases, which accelerates the oxygen pressure leaching reaction speed and generates a small amount of goethite. When the oxygen tube pressure fluctuates and the ore slurry flows back into the first oxygen tube 4a, solid phase materials are easily deposited at the bottom of the first oxygen tube 4a, resulting in a decrease in the oxygen flow rate. At this time, by increasing the oxygen flow rate of the first oxygen tube 4a, the ore slurry that flows back into the first oxygen tube 4a is directly blown out of the tube from the root by the centrifugal force of the oxygen in the tube, avoiding the narrowing of the tube cavity or direct blockage caused by the deposition of solid phase materials. The use process of the second oxygen tube 4b is the same as that of the first oxygen tube 4a. The slurry in the third and fourth compartments is leached more completely, with less oxygen consumption, increased viscosity, and enhanced adhesion to the tube wall. The smaller diameters of the third oxygen tube 4c and the fourth oxygen tube 4d are conducive to ensuring the oxygen flow rate. The oxygen ejected from the third oxygen tube 4c is inclined to the inner wall of the third air distribution ring 5c opposite, and is distributed circumferentially along the inner wall of the third air distribution ring 5c, mixed with the axial flow slurry, and the shear force of the stirrer 3 forms a three-phase uniform mixture of gas, liquid and solid, which accelerates the formation rate of goethite. At the same time, the oxygen pressure leaches incomplete substances. When the oxygen tube pressure fluctuates, the slurry flows back into the third oxygen tube 4c, and the hematite adheres to the inner tube wall around the third oxygen tube 4c, resulting in a decrease in the oxygen flow rate. At this time, by increasing the oxygen flow rate of the third oxygen tube 4c, the hematite attached to the inner tube wall around is blown out of the tube to avoid narrowing or direct blockage of the tube cavity due to the attachment of hematite. The use process of the fourth oxygen tube 4d is the same as that of the third oxygen tube 4c.

Claims

1. An oxygen pipe and gas distribution device for oxygen supply at the top of an autoclave, characterized in that: It includes an autoclave (1), which is horizontal. According to the flow direction of the leaching medium, it is divided into four compartments, namely the first, second, third, and fourth compartments, by a partition wall (2). In the middle position of each compartment, a stirrer (3) is vertically arranged. The first compartment is provided with a first oxygen pipe (4a) and a first gas distribution ring (5a). The second compartment is provided with a second oxygen pipe (4b) and a second gas distribution ring (5b). The third compartment is provided with a third oxygen pipe (4c) and a third gas distribution ring (5c). The fourth compartment is provided with a fourth oxygen pipe (4d) and a fourth gas distribution ring (5d).

2. The oxygen pipe and gas distribution device for oxygen supply at the top of the autoclave according to claim 1, characterized in that: The first oxygen pipe (4a) and the second oxygen pipe (4b) have the same pipe diameter. The third oxygen pipe (4c) and the fourth oxygen pipe (4d) have the same pipe diameter, and the pipe diameter of the first oxygen pipe (4a) is larger than that of the third oxygen pipe (4c).

3. The oxygen pipe and gas distribution device for oxygen supply at the top of the autoclave according to claim 1, characterized in that: The stirrer (3) is any one or a combination of a disk turbine stirrer, a paddle stirrer, and a propeller stirrer.

4. The oxygen pipe and gas distribution device for oxygen supply at the top of the autoclave according to claim 1, characterized in that: The first gas distribution ring (5a), the second gas distribution ring (5b), the third gas distribution ring (5c), and the fourth gas distribution ring (5d) are all cylindrical. Their diameters are equal to or smaller than the paddle diameters of the stirrers (3) in the corresponding compartments. Legs (6) are provided at the bottoms, and they are concentrically arranged directly below the stirrers (3) in the corresponding compartments through the legs (6), and are fixedly connected to the body of the autoclave (1), and the lower edges are higher than the inner wall of the autoclave (1).

5. The oxygen pipe and gas distribution device for oxygen introduction at the top of the autoclave according to claim 4, characterized in that: Oxygen pipe holes (7) are provided on both the first gas distribution ring (5a) and the second gas distribution ring (5b). First pipe supports (8a) are provided on the oxygen pipe holes (7), and first U-shaped pipe clamps (9a) are provided on the first pipe supports (8a). Second pipe supports (8b) are provided at the upper outer edges of the third gas distribution ring (5c) and the fourth gas distribution ring (5d), and second U-shaped pipe clamps (9b) are provided on the second pipe supports (8b).

6. The oxygen pipe and gas distribution device for oxygen supply at the top of the autoclave according to claim 5, characterized in that: The first oxygen pipe (4a) is in a 90° arc shape near the first gas distribution ring (5a), penetrates into the first gas distribution ring (5a) from the oxygen pipe hole (7) towards the center line of the first gas distribution ring (5a), and the penetration depth is 10 - 20 mm. The pipe orifice has a vertical cross-section and is fixed on the first gas distribution ring (5a) through the first pipe support (8a) and the first U-shaped pipe clamp (9a). The arc radius of the first oxygen pipe (4a) is equal to the horizontal distance from the straight section of the first oxygen pipe (4a) to the oxygen pipe hole (7). The arrangement of the second oxygen pipe (4b) is the same as that of the first oxygen pipe (4a).

7. The oxygen pipe and gas distribution device for oxygen supply at the top of the autoclave according to claim 5, characterized in that: The third oxygen pipe (4c) is in a 135° bent shape near the third gas distribution ring (5c) and towards the center line of the third gas distribution ring (5c), and the penetration depth is 10 - 20 mm. The pipe orifice has a 45° cross-section and is fixed on the third gas distribution ring (5c) through the second pipe support (8b) and the second U-shaped pipe clamp (9b). The arrangement of the fourth oxygen pipe (4d) is the same as that of the third oxygen pipe (4c).

8. The oxygen pipe and gas distribution device for oxygen introduction at the top of the autoclave according to claim 1, characterized in that: The autoclave (1) can be divided into four or more compartments according to the flow direction of the leaching medium. The additional compartments are located between the second compartment and the third compartment, and their oxygen pipes and gas distribution devices are configured the same as those in the first compartment.

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