Device for preparing nickel sulfate solution through continuous leaching

Abstract

The utility model relates to the technical field of non-ferrous metal hydrometallurgy leaching, in particular to a device for preparing nickel sulfate solution through continuous leaching, which comprises a dissolving kettle, a water tank, a delivery pump prefilter, a delivery pump, a transfer kettle and a filter pressing pump, a supernatant pipeline is fixedly communicated between the dissolving kettle and the water tank, a siphon pipeline is fixedly communicated between the supernatant pipeline and the conveying pump, a conveying pipeline is fixedly communicated between the conveying pump and the transfer kettle, and a sediment filter pressing pipeline is fixedly communicated on the conveying pipeline; by arranging the dissolving kettle, the water tank and the siphon pipeline, supernate in the dissolving kettle is continuously pumped into the transfer kettle according to the siphon principle, mineral raw materials in the dissolving kettle are continuously leached through continuous operation of cooperation of the double kettles, the continuous and efficient leaching effect is achieved, the production efficiency is improved, and the yield of valuable metal is increased; and meanwhile, the delivery pump pre-filter is arranged to filter large-particle materials, so that the failure rate of the delivery pump is greatly reduced, and the service life of the system is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of nonferrous metal hydrometallurgy leaching, in particular to a device for preparing nickel sulfate solution by continuous leaching. Background Art

[0002] Leaching equipment for nickel-cobalt metal hydrometallurgy has been maturely and widely used. Traditional reactors are made of steel-lined bricks or steel-lined rubber, and the stirring is paddle-type stirring. The equipment has a simple structure, excellent corrosion resistance, and is easy to repair and maintain. It is a commonly used leaching equipment in the hydrometallurgical leaching field. However, traditional reactors can only perform single-pot intermittent operations and cannot achieve continuous leaching operations, resulting in low production efficiency. At the same time, single-pot intermittent operations cannot achieve continuous leaching of mineral raw materials, and the yield of valuable metals is low. Therefore, seeking to optimize and improve traditional reactors to achieve continuous and efficient leaching, while increasing the yield of valuable metals, is an important issue for enterprises to improve their operating efficiency. Utility Model Content

[0003] The utility model provides a device for preparing nickel sulfate solution by continuous leaching, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that traditional reactors can only perform single-reactor intermittent operation and cannot realize continuous leaching operation, resulting in low production efficiency.

[0004] In order to solve the above problems, the utility model discloses a device for preparing nickel sulfate solution by continuous leaching, comprising a dissolving kettle, a water tank, a delivery pump prefilter, a delivery pump, a transfer kettle and a filter press pump; a supernatant pipeline is fixedly connected between the dissolving kettle and the water tank, a siphon pipeline is fixedly connected between the supernatant pipeline and the delivery pump, a delivery pipeline is fixedly connected between the delivery pump and the transfer kettle, and a sediment filter press pipeline is fixedly connected on the delivery pipeline; a delivery pump prefilter is fixedly connected to the bottom of the dissolving kettle, and the outlet end of the delivery pump prefilter is fixedly connected to the siphon pipeline; a filter press pump prefilter is fixedly connected to the bottom of the transfer kettle, and the outlet end of the filter press pump prefilter is fixedly connected to the filter press pump, and the outlet end of the filter press pump is fixedly connected to the filter press pipeline; a supernatant outlet ball valve is fixedly installed on the outside of the supernatant pipeline between the dissolving kettle and the siphon pipeline; a water injection ball valve is fixedly installed on the outside of the supernatant pipeline between the water tank and the siphon pipeline.

[0005] A delivery pump inlet ball valve is fixedly installed on the outside of the above-mentioned siphon pipe; a slag discharge ball valve is fixedly installed between the siphon pipe and the delivery pump pre-filter; a delivery pump outlet ball valve is fixedly installed on the outside of the delivery pipe between the sediment filter press pipe and the delivery pump; a sediment ball valve is fixedly installed on the outside of the sediment filter press pipe; a transfer kettle inlet ball valve is fixedly installed on the outside of the delivery pipe between the sediment filter press pipe and the transfer kettle; a transfer kettle outlet ball valve is fixedly installed between the filter press pump and the filter press pump pre-filter; and filter press pump outlet ball valves are fixedly installed on the outside of the filter press pipes.

[0006] The above also includes a stirring device, which is installed on the dissolving kettle and the transfer kettle. The stirring device includes a motor, a reduction mechanism, a stirring shaft and a stirring impeller, and the motor, the reduction mechanism, the stirring shaft and the stirring impeller are connected in sequence from top to bottom.

[0007] The above-mentioned delivery pump pre-filter and filter press pump pre-filter have the same structure. The delivery pump pre-filter includes a filter pipe and a connecting flange. One end of the filter pipe is located inside the dissolving kettle, and a blind plate is fixed at the port. The other end of the filter pipe is fixedly installed with a connecting flange. The outside of the filter pipe located inside the dissolving kettle is provided with a plurality of filter holes that penetrate inside and outside.

[0008] One end of the supernatant pipeline connected to the dissolving kettle is inserted into the inner side of the dissolving kettle, and the insertion depth is less than or equal to 2 / 5 of the height of the dissolving kettle.

[0009] The volume of the water tank is greater than the volume of the siphon pipe.

[0010] The utility model provides a dissolving kettle, a water tank and a siphon pipe, and utilizes the siphon principle to continuously extract the supernatant in the dissolving kettle to the transfer kettle. Through the continuous operation of the two kettles, the mineral raw materials in the dissolving kettle are continuously leached, thereby achieving the effect of continuous and efficient leaching, improving production efficiency, and increasing the yield of valuable metals. At the same time, a pre-filter of the delivery pump is provided to filter large particle materials, thereby greatly reducing the failure rate of the delivery pump and increasing the service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0012] Figure 1 It is a schematic diagram of the device structure of the utility model.

[0013] Figure 2 for Figure 1 Schematic diagram of the structure of the pre-filter of the delivery pump.

[0014] In the figure: 1-dissolving kettle; 2-supernatant liquid pipeline; 3-supernatant liquid outlet ball valve; 4-water tank; 5-water injection ball valve; 6-siphon pipeline; 7-filtration pipeline; 8-slag discharge ball valve; 9-delivery pump inlet ball valve; 10-delivery pump; 11-delivery pump outlet ball valve; 12-sediment filter press pipeline; 13-delivery pipeline; 14-transfer kettle inlet ball valve; 15-transfer kettle; 16-transfer kettle outlet ball valve; 17-filter pressure pump; 18-filter pressure pump outlet ball valve; 19-filter pressure pipeline; 20-sediment ball valve; 21-motor; 22-reduction mechanism; 23-agitation shaft; 24-agitation impeller; 25-connecting flange; 26-filter hole. DETAILED DESCRIPTION

[0015] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0016] The present invention is further described below in conjunction with the embodiments and drawings:

[0017] like Figure 1 As shown, a device for preparing nickel sulfate solution by continuous leaching comprises a dissolving kettle 1, a water tank 4, a pre-filter of a delivery pump, a delivery pump 10, a transfer kettle 15, and a filter press pump 17; a supernatant pipeline 2 is fixedly connected between the dissolving kettle 1 and the water tank 4, a siphon pipeline 6 is fixedly connected between the supernatant pipeline 2 and the delivery pump 10, a delivery pipeline 13 is fixedly connected between the delivery pump 10 and the transfer kettle 15, and a sediment filter press pipeline 12 is fixedly connected to the delivery pipeline 13; a delivery pipeline 13 is fixedly connected to the bottom of the dissolving kettle 1 A pump pre-filter, the outlet end of the delivery pump pre-filter is fixedly connected to the siphon pipe 6; a filter press pump pre-filter is fixedly connected to the bottom of the transfer kettle 15, a filter press pump 17 is fixedly connected to the outlet end of the filter press pump pre-filter, and a filter press pipe 19 is fixedly connected to the outlet end of the filter press pump 17; a supernatant outlet ball valve 3 is fixedly installed on the outside of the supernatant pipe 2 between the dissolving kettle 1 and the siphon pipe 6; a water injection ball valve 5 is fixedly installed on the outside of the supernatant pipe 2 between the water tank 4 and the siphon pipe 6.

[0018] During operation, the nickel hydroxide mineral raw material is added from the feeding port of the dissolving kettle 1, and sulfuric acid, new water, steam, etc. are introduced for leaching reaction. At the same time, new water is injected into the water tank 4. After the slurry on the upper part of the dissolving kettle 1 turns green, the water injection ball valve 5 is opened, and water is injected into the siphon pipe 6. After the water injection is completed, the water injection ball valve 5 is closed, the delivery pump 10 is started, and the supernatant outlet ball valve 3 is opened. After the delivery pump 10 discharges the new water in the siphon pipe 6, a negative pressure is formed inside the siphon pipe 6, so that the supernatant in the dissolving kettle 1 is sucked into the siphon pipe 6 by the negative pressure, and then the delivery pump 10 delivers the supernatant to the transfer kettle 15 through the delivery pipe 13; after the supernatant is extracted, the dissolving kettle 1 continues to be charged with hydrogen and oxygen. Nickel is dissolved, sulfuric acid, new water, steam, etc. are introduced, and the original mineral residue in the dissolving kettle 1 continues to react with the newly added materials. After the slurry on the upper part of the dissolving kettle 1 turns green, the above operation is repeated, thereby realizing continuous leaching operation. At the same time, the mineral raw materials in the kettle realize multiple rounds of repeated leaching, and the metal yield is greatly improved; the nickel content of the discharged supernatant is detected by an external detection device. After detecting that the nickel content is lower than the process setting index, the delivery pump 10 and the filter pressure pump 17 are started, and the slag discharge and filtration are started. At this time, the delivery pump pre-filter and the filter pressure pump pre-filter filter the large particles to avoid the delivery pump 10 and the filter pressure pump 17 from wear and failure, reduce the equipment failure rate, and ensure the continuous operation of the system.

[0019] In summary, the utility model sets a dissolving kettle 1, a water tank 4 and a siphon pipe 6, and utilizes the siphon principle to continuously extract the supernatant in the dissolving kettle 1 to the transfer kettle 15. Through the continuous operation of the two kettles, the mineral raw materials in the dissolving kettle 1 are continuously leached, thereby achieving the effect of continuous and efficient leaching, improving production efficiency, and increasing the yield of valuable metals; at the same time, by setting a pre-filter for the delivery pump to filter large particles, the failure rate of the delivery pump 10 is greatly reduced, and the service life of the system is increased.

[0020] like Figure 1 As shown, a delivery pump inlet ball valve 9 is fixedly installed on the outside of the siphon pipe 6; a slag discharge ball valve 8 is fixedly installed between the siphon pipe 6 and the delivery pump pre-filter; a delivery pump outlet ball valve 11 is fixedly installed on the outside of the delivery pipe 13 between the sediment filter press pipe 12 and the delivery pump 10; a sediment ball valve 20 is fixedly installed on the outside of the sediment filter press pipe 12; a transfer kettle inlet ball valve 14 is fixedly installed on the outside of the delivery pipe 13 between the sediment filter press pipe 12 and the transfer kettle 15; a transfer kettle outlet ball valve 16 is fixedly installed between the filter press pump 17 and the filter press pump pre-filter; and a filter press pump outlet ball valve 18 is fixedly installed on the outside of the filter press pipe 19.

[0021] The above-mentioned delivery pump inlet ball valve 9 and delivery pump outlet ball valve 11 are used to control the liquid inlet and outlet of the delivery pump 10; the slag discharge ball valve 8 is used to control the on-off between the delivery pump pre-filter and the siphon pipe 6. During the leaching operation, the slag discharge ball valve 8 is in a closed state, and during the slag discharge filter press operation, the slag discharge ball valve 8 is in an open state; the sediment ball valve 20 is used to start the filter press operation when the slag discharge filter press is in progress; the transfer kettle inlet ball valve 14 is used to control the liquid inlet of the transfer kettle 15; the transfer kettle outlet ball valve 16 is used to control the liquid outlet of the transfer kettle 15 and the slag discharge filter press operation; the filter press pump outlet ball valve 18 is used to control the liquid outlet of the filter press pump 17.

[0022] like Figure 1 As shown, the stirring device is also included. The stirring device is installed on both the dissolving kettle 1 and the transfer kettle 15. The stirring device includes a motor 21, a speed reduction mechanism 22, a stirring shaft 23 and a stirring impeller 24. The motor 21, the speed reduction mechanism 22, the stirring shaft 23 and the stirring impeller 24 are sequentially connected from top to bottom. Among them, the speed reduction mechanism 22 is a known technology; when working, the lower end of the stirring shaft 23 and the connected stirring impeller 24 are both located in the corresponding dissolving kettle 1 or the transfer kettle 15, thereby facilitating the stirring of the slurry in the dissolving kettle 1 and the transfer kettle 15.

[0023] like Figure 1 , 2As shown, the delivery pump pre-filter and the filter press pump pre-filter have the same structure. The delivery pump pre-filter includes a filter pipe 7 and a connection flange 25. One end of the filter pipe 7 is located inside the dissolving kettle 1, and a blind plate is fixed at the port. The other end of the filter pipe 7 is fixedly installed with a connection flange 25. The outside of the filter pipe 7 located inside the dissolving kettle 1 is provided with a plurality of filter holes 26 that penetrate inside and outside. Therefore, the filter pipe 7 can be a titanium metal pipe, which has the characteristics of high strength and light weight, and excellent corrosion resistance.

[0024] like Figure 1 As shown, one end of the supernatant pipe 2 connected to the dissolving kettle 1 is inserted into the inner side of the dissolving kettle 1, and the insertion depth is less than or equal to 2 / 5 of the height of the dissolving kettle 1. Thus, during the siphoning process, the medium entering the supernatant pipe 2 is ensured to be nickel sulfate solution, preventing the slag at the bottom of the dissolving kettle 1 from entering the pipe.

[0025] like Figure 1 As shown, the volume of the water tank 4 is greater than the volume of the siphon pipe 6. Thus, it can be ensured that the water in the water tank 4 can fill the siphon pipe, promoting the system to produce 100% siphon effect.

Claims

1. A device for preparing nickel sulfate solution by continuous leaching, characterized in that: It includes a dissolving kettle, a water tank, a delivery pump pre-filter, a delivery pump, a transfer kettle and a filter press pump; a supernatant pipeline is fixedly connected between the dissolving kettle and the water tank, a siphon pipeline is fixedly connected between the supernatant pipeline and the delivery pump, a delivery pipeline is fixedly connected between the delivery pump and the transfer kettle, and a sediment filter press pipeline is fixedly connected on the delivery pipeline; a delivery pump pre-filter is fixedly connected to the bottom of the dissolving kettle, and the outlet end of the delivery pump pre-filter is fixedly connected to the siphon pipeline; a filter press pump pre-filter is fixedly connected to the bottom of the transfer kettle, and the outlet end of the filter press pump pre-filter is fixedly connected to the filter press pump, and the outlet end of the filter press pump is fixedly connected to the filter press pipeline; a supernatant outlet ball valve is fixedly installed on the outside of the supernatant pipeline between the dissolving kettle and the siphon pipeline; a water injection ball valve is fixedly installed on the outside of the supernatant pipeline between the water tank and the siphon pipeline.

2. The device for preparing nickel sulfate solution by continuous leaching according to claim 1, characterized in that: A delivery pump inlet ball valve is fixedly installed on the outside of the siphon pipe; a slag discharge ball valve is fixedly installed between the siphon pipe and the delivery pump pre-filter; a delivery pump outlet ball valve is fixedly installed on the outside of the delivery pipe between the sediment filter press pipe and the delivery pump; a sediment ball valve is fixedly installed on the outside of the sediment filter press pipe; a transfer kettle inlet ball valve is fixedly installed on the outside of the delivery pipe between the sediment filter press pipe and the transfer kettle; a transfer kettle outlet ball valve is fixedly installed between the filter press pump and the pre-filter of the filter press pump; and filter press pump outlet ball valves are fixedly installed on the outside of the filter press pipes.

3. A device for preparing nickel sulfate solution by continuous leaching according to claim 1 or 2, characterized in that: It also includes a stirring device. The dissolving kettle and the transfer kettle are both equipped with the stirring device. The stirring device includes a motor, a reduction mechanism, a stirring shaft and a stirring impeller. The motor, the reduction mechanism, the stirring shaft and the stirring impeller are connected in sequence from top to bottom.

4. A device for preparing nickel sulfate solution by continuous leaching according to claim 1 or 2, characterized in that: The delivery pump pre-filter and the filter press pump pre-filter have the same structure. The delivery pump pre-filter includes a filter pipe and a connecting flange. One end of the filter pipe is located inside the dissolving kettle, and a blind plate is fixed at the port. The other end of the filter pipe is fixedly installed with a connecting flange. The outside of the filter pipe located inside the dissolving kettle is provided with a plurality of filter holes that pass through inside and outside.

5. The device for preparing nickel sulfate solution by continuous leaching according to claim 3, characterized in that: The delivery pump pre-filter and the filter press pump pre-filter have the same structure. The delivery pump pre-filter includes a filter pipe and a connecting flange. One end of the filter pipe is located inside the dissolving kettle, and a blind plate is fixed at the port. The other end of the filter pipe is fixedly installed with a connecting flange. The outside of the filter pipe located inside the dissolving kettle is provided with a plurality of filter holes that pass through inside and outside.

6. The device for preparing nickel sulfate solution by continuous leaching according to claim 1, 2 or 5, characterized in that: One end of the supernatant liquid pipeline connected to the dissolving kettle is inserted into the inner side of the dissolving kettle, and the insertion depth is less than or equal to 2 / 5 of the height of the dissolving kettle.

7. The device for preparing nickel sulfate solution by continuous leaching according to claim 3, characterized in that: One end of the supernatant liquid pipeline connected to the dissolving kettle is inserted into the inner side of the dissolving kettle, and the insertion depth is less than or equal to 2 / 5 of the height of the dissolving kettle.

8. The device for preparing nickel sulfate solution by continuous leaching according to claim 4, characterized in that: One end of the supernatant liquid pipeline connected to the dissolving kettle is inserted into the inner side of the dissolving kettle, and the insertion depth is less than or equal to 2 / 5 of the height of the dissolving kettle.

9. The device for preparing nickel sulfate solution by continuous leaching according to claim 1 or 2 or 5 or 7 or 8, characterized in that: The volume of the water tank is greater than the volume of the siphon pipe.

10. The device for preparing nickel sulfate solution by continuous leaching according to claim 6, characterized in that: The volume of the water tank is greater than the volume of the siphon pipe.

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