Cyanidation leachate treatment device

Abstract

The invention discloses a cyanidation leachate treatment device which comprises a stock solution storage unit, an experimental reaction kettle and a pipeline system for conveying stock solution in the stock solution storage unit to the experimental reaction kettle, and further comprises a quantitative extraction unit arranged on the pipeline system and used for quantitatively extracting the stock solution, the experimental reaction kettle is communicated with the liquid outlet end of the quantitative extraction unit through a pipeline system; the recovery treatment unit is communicated with the experimental reaction kettle through a pipeline system and is used for treating waste liquid in the experimental reaction kettle; the filtering unit is arranged at the stock solution inlet end of the quantitative extraction unit, and when the stock solution is quantitatively extracted, metal in the stock solution is prevented from entering the quantitative extraction unit; the backwashing unit is arranged on the pipeline system, located between the liquid inlet end of the quantitative extraction unit and the filtering unit and used for driving the stock solution to reversely flow to the filtering unit, all the working units are matched, quantitative extraction and use of the stock solution are facilitated, and the production efficiency is improved while the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of gold ore smelting raw material treatment, and in particular to a cyanide leaching solution treatment device. Background Technology

[0002] Gold ore smelting typically involves several steps, including pretreatment, leaching, purification, and refining. In the leaching stage, the ground slurry is mixed with a cyanide solution, and other auxiliary solvents are added to dissolve the gold in the solution. During the purification process, the gold in the solution is adsorbed and purified for subsequent processing.

[0003] To detect the concentration of cyanide in the leachate and optimize the process, cyanide experiments are needed to determine the cyanide concentration in the cyanide leachate, or to treat cyanide-containing wastewater to reduce the cyanide content. However, with increasingly stringent environmental protection requirements and higher demands for resource utilization, the treatment technology of the raw solution during the experiment faces new challenges. Traditional methods suffer from significant waste of raw solution and low metal recovery rates during the experiment, which not only increases production costs but also poses environmental pollution risks.

[0004] For the aforementioned technologies, common solutions currently include: open-type stock solution extraction systems, which extract stock solutions using a simple siphon principle, but cannot accurately control the amount of liquid extracted, resulting in significant waste; disposable stock solution solutions, where waste liquid is directly discharged and treated after the experiment, which is simple in process but expensive; and fixed-volume samplers, which use containers of fixed capacity for sampling, which can quantify but lacks flexibility. Summary of the Invention

[0005] To address the aforementioned problems, this application provides a cyanide leaching solution treatment apparatus.

[0006] This application provides a cyanide leachate treatment device, which adopts the following technical solution: A cyanide leaching solution treatment device includes a raw solution storage unit, an experimental reactor, and a pipeline system for conveying the raw solution from the storage unit to the experimental reactor. It further includes: a quantitative extraction unit, installed on the pipeline system, for quantitatively extracting the raw solution; the experimental reactor is connected to the outlet of the quantitative extraction unit via the pipeline system; a recovery and treatment unit, connected to the experimental reactor via the pipeline system, for treating waste liquid in the experimental reactor; a filtration unit, installed at the raw solution inlet of the quantitative extraction unit, for preventing metals in the raw solution from entering the quantitative extraction unit during quantitative extraction; a backwashing unit, installed on the pipeline system and located between the inlet of the quantitative extraction unit and the filtration unit, for driving the raw solution to flow backwards towards the filtration unit; and a control system for controlling the connection and disconnection of the pipeline system between the various units.

[0007] By adopting the above technical solution, the control system controls the pipeline system, allowing any working unit to operate independently from the pipeline system when not in operation, preventing it from affecting the normal operation of other working units. When the quantitative extraction device is working, it quantitatively extracts the raw solution from the raw solution storage unit and transports it along the pipeline system to the experimental reactor for reaction. During extraction, the filtration unit filters the raw solution, preventing gold in the raw solution from the storage unit from entering the experimental reactor. After the raw solution completes the reaction in the experimental reactor, the remaining waste liquid is transported through the pipeline system to the recycling unit for recovery. After the experiment is completed, the backwashing unit operates, driving the raw solution in the pipeline system to flow towards the raw solution storage unit, thereby flushing away the gold adhering to the filtration unit and cleaning it. Each working unit can operate independently or cooperate with each other, and all can be independently disassembled and replaced. This achieves quantitative extraction and use of raw solution while reducing production costs and streamlining the workflow, offering flexibility and improving work efficiency.

[0008] Optionally, the recycling unit includes an activated carbon adsorption layer and an ion exchange resin layer. When treating waste liquid, the waste liquid is passed through the activated carbon adsorption layer and the ion exchange resin layer in sequence, and the volume ratio of the activated carbon adsorption layer to the ion exchange resin layer is 1:2.

[0009] By adopting the above technical solution, the activated carbon adsorption layer is used to remove organic matter and some heavy metals from the waste liquid, and the ion exchange resin layer is used to remove the main metal ions from the waste liquid. The waste liquid is recycled by combining the two.

[0010] Optionally, the backwashing unit includes a pulse cleaning device with an operating pressure of 0.3-0.5 MPa.

[0011] By adopting the above technical solution, the pulse cleaning device pushes the raw liquid to repeatedly impact the filter unit at a preset frequency when it is working, which helps to improve the cleaning effect on the filter unit.

[0012] Optionally, the inlet end of the backwashing unit is connected to the outlet end of the recovery treatment unit, for conveying the recovered raw liquid to the filtration unit.

[0013] By adopting the above technical solution, in the working state, the backwashing unit will transport the recovered raw liquid back to the raw liquid storage unit for circulation, which is conducive to improving the utilization rate of raw liquid and saving resources.

[0014] Optionally, it also includes: a quantitative unit located between the reaction vessel and the quantitative extraction unit. The quantitative unit has a quantitative chamber inside. When the raw liquid flows from the quantitative extraction unit to the experimental reaction vessel, it passes through the quantitative chamber. The quantitative unit is equipped with a drain restriction unit. Before the raw liquid fills the quantitative chamber, the drain restriction unit restricts the raw liquid from entering the experimental reaction vessel. During the process of the raw liquid entering the experimental reaction vessel, the drain restriction unit prevents the raw liquid in the pipeline system from entering the quantitative chamber.

[0015] By adopting the above technical solution, before the quantitative extraction unit delivers the stock solution to the experimental reactor, the quantitative unit temporarily stores the stock solution through the quantitative chamber. During this process, the draining restriction unit isolates the quantitative chamber from the experimental reactor until the stock solution fills the quantitative chamber. Afterward, the draining restriction unit prevents the stock solution in the pipeline system from continuing to enter the quantitative chamber. The quantitative chamber performs a second quantitative measurement of the stock solution. After the second quantitative measurement is completed, the draining restriction unit closes, allowing the stock solution in the quantitative chamber to flow into the experimental reactor.

[0016] Optionally, the metering unit includes a metering cylinder, a piston disc, and a pusher. The metering cylinder is connected between the experimental reactor and the piping system. The discharge limiting unit includes a first limiting part and a second limiting part. The piston disc is located inside the metering cylinder, and the metering cylinder is divided into two independent chambers with the piston disc as the center. The chamber between the piston disc and the experimental reactor is the metering chamber. The first limiting part is located at the lower end of the metering cylinder and is used to control the connection and disconnection between the metering chamber and the experimental reactor. A stop element is provided inside the metering cylinder to limit the maximum displacement of the piston disc. The pusher is provided on the metering cylinder and is used to push the piston disc to move along the axis. A flow guiding channel is opened inside the piston disc. The second limiting part is provided on the piston disc and is used to control the connection or disconnection between the flow guiding channel and the metering chamber. The piping system is provided with a flexible hose for connecting the flow guiding channel.

[0017] By adopting the above technical solution, in the initial state, the piston disc is located near the experimental reactor in the metering cylinder. The first limiting part disconnects the metering chamber from the experimental reactor. Under the action of the second limiting part, the flow channel is connected to the metering chamber. The pipeline system delivers the raw liquid to the metering chamber through the hose and the flow channel. The raw liquid in the metering chamber pushes the piston disc to move until the stop member blocks the piston disc. The second limiting part disconnects the flow channel from the metering chamber. At this time, the volume of the raw liquid in the metering chamber reaches the preset amount. The first limiting part opens, and the piston disc is pushed down by the pushing member, thereby pressing the raw liquid in the metering chamber into the experimental reactor to complete the secondary metering, which is beneficial to improving the metering accuracy of the raw liquid.

[0018] Optionally, the chamber between the piston disc and the quantitative extraction unit is set as a buffer chamber. The second limiting member controls the connection and disconnection between the flow guide channel and the buffer chamber. When the second limiting member is in operation, the flow guide channel is only connected to one of the quantitative chamber or the buffer chamber. The upper end of the piston disc is provided with a collection groove along the circumference. The liquid inlet end of the backwash unit is connected to a recovery pipe. The recovery pipe passes through the quantitative cylinder and extends into the collection groove.

[0019] By adopting the above technical solution, when the second limiting part disconnects the flow channel from the quantitative chamber and connects the flow channel to the buffer chamber, the residual raw liquid in the pipeline system enters the buffer chamber under the action of internal pressure and inertia, and gathers in the collection tank. When the backwashing unit is working, the excess raw liquid in the collection tank is sucked out through the recovery pipe and the raw liquid is transported back to the raw liquid storage unit, which is beneficial to improving the utilization rate of raw liquid.

[0020] Optionally, the upper end of the metering cylinder is connected to a buffer cylinder, which is made of a deformable material and is used to balance the air pressure inside the metering cylinder.

[0021] By adopting the above technical solution, the volume of the internal chamber of the metering cylinder changes during the movement of the piston disc. At this time, the volume of the buffer cylinder changes synchronously with the gas pressure, thereby balancing the gas pressure inside the metering cylinder.

[0022] In summary, this application includes at least one of the following beneficial technical effects: The control system manages the piping system, allowing any working unit to operate independently when not in use, preventing it from affecting the normal operation of other units. During operation, the quantitative extraction device extracts a fixed amount of raw material from the storage unit and transports it through the piping system to the experimental reactor for reaction. During extraction, a filtration unit filters the raw material, preventing gold from the storage unit from entering the reactor. After the reaction in the reactor, the remaining waste liquid is transported through the piping system to the recycling unit for recovery. After the experiment, a backwashing unit operates, drawing raw material from the piping system towards the storage unit, flushing away any gold adhering to the filtration unit and cleaning it. Each working unit can operate independently or in conjunction with others, and all can be independently disassembled and replaced. This system achieves quantitative extraction and use of raw material while reducing production costs and streamlining the workflow, offering flexibility and improving efficiency. Before the quantitative extraction unit delivers the stock solution to the experimental reactor, the quantitative unit temporarily stores the stock solution through the quantitative chamber. During this process, the discharge restriction unit isolates the quantitative chamber from the experimental reactor until the stock solution fills the quantitative chamber. Afterward, the discharge restriction unit prevents the stock solution in the pipeline system from entering the quantitative chamber. The quantitative chamber performs a second quantitative measurement of the stock solution. After the second quantitative measurement is completed, the discharge restriction unit closes, allowing the stock solution in the quantitative chamber to flow into the experimental reactor. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0024] Figure 2 This is a schematic diagram designed to highlight the internal structure of the recycling and processing unit.

[0025] Figure 3 This is a schematic diagram of the overall structure of Example 2.

[0026] Figure 4 This is a schematic diagram designed to highlight the location of quantitative units.

[0027] Figure 5 This is a schematic diagram designed to highlight the piston disc structure.

[0028] Figure 6 This is a schematic diagram designed to highlight the connection between the positioning block and the stop plate.

[0029] Explanation of reference numerals in the attached drawings: 1. Stock solution storage unit; 2. Experimental reaction vessel; 3. Quantitative extraction unit; 4. Recovery and treatment unit; 41. Box body; 42. Filter layer; 421. Activated carbon adsorption layer; 422. Ion exchange resin layer; 5. Filter unit; 6. Backwashing unit; 61. Recovery tube; 7. Quantitative unit; 71. Quantitative cylinder; 711. Flexible barrier tube; 712. Telescopic isolation tube; 72. Piston disc; 721. Flow guide channel; 722. Aggregating tank; 723. Piston rod; 724. Connecting rod; 725. Push block; 73. Pushing component; 731, Push ring; 732, Drive motor; 741, Baffle; 742, Slide rod; 743, Threaded rod; 744, Threaded cylinder; 75, Buffer cylinder; 761, Through hole; 762, Retaining ring; 811, Blocking plate one; 812, Elastic component one; 813, Stop block; 814, Drain hole; 815, Slot; 816, Movable block; 817, Elastic component two; 818, Receiving groove; 821, Blocking plate two; 822, Buffer hole; 823, Horizontal hole one; 824, Metering hole; 825, Horizontal hole two; 826, Elastic component three. Detailed Implementation

[0030] The present application will be further described in detail below with reference to all the accompanying drawings.

[0031] This application discloses a cyanide leachate treatment device. Example 1

[0032] Reference Figure 1 A cyanide leaching solution treatment device includes, in sequence, a raw solution storage unit 1, a filtration unit 5, a backwashing unit 6, a quantitative extraction unit 3, an experimental reaction vessel 2, and a recovery treatment unit 4. It also includes conveying pipelines connecting each working unit. All conveying pipelines cooperate to form a pipeline system. A control system is installed on the pipeline system. The control system includes solenoid valves and a control center. The solenoid valves are installed on the conveying pipelines between each working unit and are controlled to operate by the central control system.

[0033] The raw material storage unit 1 contains the leachate stock solution. When the quantitative extraction unit 3 is in operation, it extracts the stock solution from the storage unit 1 quantitatively and stably through a pipeline system. Specifically, the quantitative extraction unit 3 can be a precision metering pump with a flow control accuracy of ±0.5%, or it can be a peristaltic pump, designed according to actual needs. The filter unit 5 is connected to the outlet end of the raw material storage unit 1 to prevent gold from flowing out of the storage unit 1.

[0034] refer to Figure 1 and Figure 2 The experimental reactor 2 is connected to the outlet of the quantitative extraction unit 3. When the quantitative extraction unit 3 is working, it quantitatively and stably delivers the original solution into the experimental reactor 2 for the experiment. The recovery and treatment unit 4 includes an outer casing 41 and a filter layer 42 located inside the casing 41. In this embodiment, the filter layer 42 includes an activated carbon adsorption layer 421 and an ion exchange resin layer 422 arranged vertically, with a volume ratio of 1:2. After the experiment is completed, the waste liquid in the experimental reactor 2 is transported to the casing 41 through a delivery pipe and filtered through the filter layer 42. The activated carbon adsorption layer 421 removes organic matter and some heavy metals from the waste liquid, while the ion exchange resin layer 422 removes the main metal ions. Furthermore, the specific material of the filter layer 42 can be adjusted according to the composition of the original solution to suit different experimental requirements.

[0035] refer to Figure 1The backwashing unit 6 is installed on the pipeline system and connected to the raw liquid storage unit 1 via the pipeline system. In this embodiment, the backwashing unit 6 is specifically a pulse cleaning device with an operating pressure of 0.3-0.5 MPa. During the experiment, the backwashing unit 6 is in a stopped state and is isolated from other working units by cutting off the delivery pipeline, thereby reducing the impact on the flow of raw liquid. After the experiment is completed, the pulse cleaning device operates and pushes the raw liquid in the pipeline system to flow at a preset frequency. While cleaning the crystals inside the pipeline system, it also back-impacts the filter unit 5, thereby reducing the probability of blockage in the pipeline system or the filter unit 5. Furthermore, the backwashing unit 6 can also be directly connected to the liquid outlet of the recovery and treatment unit 4, so that the recovered raw liquid can be directly extracted and returned to the raw liquid storage unit 1 during operation.

[0036] The implementation principle of Example 1 is as follows: A control system controls the connection and disconnection of the conveying pipelines between each unit. When the quantitative extraction device is working, the raw liquid is quantitatively conveyed from the raw liquid storage unit 1 to the experimental reaction vessel 2. During the extraction process, the filtration unit 5 filters the raw liquid, preventing gold in the raw liquid in the raw liquid storage unit 1 from entering the experimental reaction vessel 2 along with the raw liquid. After the raw liquid completes the reaction in the experimental reaction vessel 2, the remaining waste liquid is conveyed along the pipeline system to the recycling unit 4 for recycling. When the backwashing unit 6 is working, it drives the remaining raw liquid in the pipeline system to flow back towards the raw liquid storage unit 1, thereby flushing away the gold adhering to the filtration unit 5 and the gold in the pipeline system. The various working units cooperate with each other, achieving quantitative extraction and use of the raw liquid while reducing production costs. The flexible operation process is beneficial for improving work efficiency. Example 2

[0037] Reference Figure 3 , Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that the device further includes a quantitative unit 7, which comprises a quantitative cylinder 71, a piston disc 72, and a pusher 73. The quantitative cylinder 71 is installed on the upper end of the experimental reaction vessel 2 and is connected to the experimental reaction vessel 2. The quantitative extraction unit 3 is connected to the upper end of the quantitative cylinder 71 through a delivery pipe. The piston disc 72 is located inside the quantitative cylinder 71 and is slidably connected to the quantitative cylinder 71 along the axial direction. The quantitative cylinder 71 is divided into two independent chambers by the piston disc 72. The chamber closer to the experimental reaction vessel 2 is designated as the quantitative chamber, and the chamber closer to the quantitative extraction unit 3 is designated as the buffer chamber.

[0038] Reference Figure 5 and Figure 6A drain restriction unit is also provided inside the metering cylinder 71. The drain restriction unit includes a first restriction part and a second restriction part. The first restriction part includes a blocking plate 811, an elastic element 812, and a stop block 813. The lower end of the metering cylinder 71 has a through hole 761 communicating with the experimental reaction vessel 2 along the axial direction. A retaining ring 762 is fixedly connected to the end of the metering cylinder 71 away from the experimental reaction vessel 761 along the circumference of the through hole 761. The blocking plate 811 is located inside the through hole 761 and is slidably connected to the inner wall of the through hole 761 along the axial direction. The blocking plate 811 has a drain hole 814 along the axial direction. The elastic element 812 is a spring and is disposed between the blocking plate 811 and the metering cylinder 71. In the natural state of the spring, the upper end of the blocking plate 811 is in contact with the retaining ring 762. At this time, the retaining ring 762 blocks the drain hole 814, and the through hole 761 is disconnected from the metering chamber.

[0039] Reference Figure 5 and Figure 6 The outer circumference of the first blocking plate 811 has a radial groove 815. A stop block 813 corresponds to each groove 815 and passes through the metering cylinder 71 along its length, slidingly connecting with the cylinder. A movable block 816 is vertically fixed to one side of the stop block 813 outside the metering cylinder 71. The movable block 816 extends towards the upper end of the metering cylinder 71, and an elastic element 817, also a spring, is provided between the movable block 816 and the metering cylinder 71. In its natural state, the elastic element 817 pushes the movable block 816 closer to the metering cylinder 71, thereby inserting the stop block 813 into the groove 815 and fixing the first blocking plate 811.

[0040] Reference Figure 5 and Figure 6 The pushing component 73 includes a push ring 731 and a drive motor 732. The push ring 731 is located outside the metering cylinder 71 and is slidably connected to the metering cylinder 71 along the axial direction. The upper end of the movable block 816 has a receiving groove 818 for placing the push ring 731. When the push ring 731 is located in the receiving groove 818, the movable block 816 is close to the metering cylinder 71, and the elastic element 1 812 and elastic element 2 817 are both in their natural state. The drive motor 732 is installed on the upper end of the metering cylinder 71, and a lead screw is coaxially fixed to the output shaft of the drive motor 732. The lead screw passes through the push ring 731 and is threadedly connected to the push ring 731. When the drive motor 732 is working, the push ring 731 is moved along the axial direction through the lead screw. The receiving groove 818 is inclined near the side wall of the stop block 813. When the push ring 731 contacts the inner wall of the receiving groove 818, it pushes the movable block 816 away from the metering cylinder 71. At this time, the stop block 813 moves out of the slot 815, thereby releasing the limit on the blocking plate 811.

[0041] Reference Figure 5 and Figure 6The piston disc 72 has a vertical hole along the axial direction. The second limiting part includes a second blocking disc 821 and an elastic element 826. The second blocking disc 821 is located in the vertical hole and is slidably connected to the piston disc 72 along the axial direction. The piston disc 72 also has a guide channel 721 that communicates with the vertical hole. A hose is connected between the pipeline system and the guide channel 721 of the piston disc 72. The raw liquid delivered by the quantitative extraction device enters the guide channel 721 along the hose.

[0042] Reference Figure 5 and Figure 6 The upper end of the second blocking plate 821 has a buffer hole 822 communicating with the buffer chamber along the axial direction, and the second blocking plate 821 has a horizontal hole 823 communicating with the buffer hole along the circumferential direction. The lower end of the second blocking plate 821 has a metering hole 824 communicating with the metering chamber, and a horizontal hole 825 communicating with the metering hole 824 along the transverse direction. The third elastic element 826 is located between the second blocking plate 821 and the piston plate 72. The third elastic element 826 can be a spring. In its natural state, the upper end of the second blocking plate 821 passes through the vertical hole and extends to the outside of the piston plate 72. At this time, the second horizontal hole 825 is directly opposite the guide channel 721. The original liquid in the guide channel 721 enters the metering chamber along the second horizontal hole 825 and the metering hole 824.

[0043] Reference Figure 5 and Figure 6 A piston rod 723 is fixedly connected to the upper end of the piston disc 72. The piston rod 723 passes through the metering cylinder 71 and extends to the outside of the metering cylinder 71. The movement of the piston disc 72 drives the piston rod 723 to move. A flexible barrier tube 711 is provided between the metering cylinder 71 and the piston disc 72. The flexible barrier tube 711 is made of corrosion-resistant material and covers the outside of the piston rod 723, thereby preventing the piston rod 723 from contacting the original liquid. A connecting rod 724 is fixedly connected to one end of the piston rod 723 that extends outside the metering cylinder 71. The connecting rod 724 is parallel to the piston rod 723 and located outside the metering cylinder 71. A push block 725 is fixedly connected to the end of the connecting rod 724 away from the piston rod 723. The push block 725 is located below the push ring 731.

[0044] Reference Figure 5 and Figure 6 The metering cylinder 71 is also equipped with a stop component, which includes a baffle 741, a sliding rod 742, a threaded rod 743, and a threaded cylinder 744. The baffle 741 is located inside the metering cylinder 71 and above the piston disc 72. A hollow ring directly opposite the blocking disc 821 is fixedly connected to the middle of the baffle 741. The sliding rod 742 and the threaded rod 743 are parallel to each other and are both fixedly connected to the upper end of the baffle 741. The sliding rod 742 and the threaded rod 743 both pass through the metering cylinder 71 and extend to the outside of the metering cylinder 71. The metering cylinder 71 guides the baffle 741 through the cooperation of the sliding rod 742 and the threaded rod 743, thereby guiding the baffle 741 to move vertically.

[0045] Reference Figure 5 and Figure 6 The threaded cylinder 744 is rotatably connected to the upper end of the metering cylinder 71, and is sleeved on the outside of the threaded rod 743 and threadedly connected to the threaded rod 743. Under the guidance of the sliding rod 742, when the operator rotates the threaded cylinder 744, the threaded cylinder 744 pushes the baffle 741 to move vertically through the threaded rod 743, thereby adjusting the position of the baffle 741. Furthermore, a telescopic isolation tube 712 is also provided inside the metering cylinder 71. The telescopic isolation tube 712 is sleeved on the outside of the sliding rod 742 and the threaded rod 743, thereby preventing the threaded rod 743 and the sliding rod 742 from contacting the original liquid.

[0046] Reference Figure 4 and Figure 6 Furthermore, the upper end of the metering cylinder 71 is connected to a buffer cylinder 75, which is made of a deformable material. When the piston disc 72 moves, the volume of the buffer chamber changes, and the volume of the buffer cylinder 75 changes synchronously with the buffer chamber, thereby balancing the air pressure inside the metering cylinder 71.

[0047] Reference Figure 5 and Figure 6 In the initial state, the piston disc 72 is positioned closest to the first plug disc 811, and the push ring 731 is located within the receiving groove 818, causing the stop block 813 to be positioned within the slot 815, thus positioning the first plug disc 811. The metering orifice 824 is connected to the flow guide channel 721, and the raw liquid flows into the metering chamber along the metering orifice 824. Since the metering chamber is in a sealed state, it pushes the piston disc 72 gradually away from the first plug disc 811 and causes the second plug disc 821 to move closer to the hollow ring.

[0048] Reference Figure 5 and Figure 6 The position of baffle 741 is adjusted according to a preset value. When piston disc 72 approaches baffle 741, the part of plug disc 821 extending from the vertical hole gradually contacts retaining ring 762. Piston disc 72 continues to move, and the retaining ring blocks plug disc 821, causing relative displacement between plug disc 821 and piston disc 72. This causes transverse hole 825 to gradually move away from guide channel 721. When piston disc 72 reaches its maximum displacement position, guide channel 721 connects with transverse hole 823. At this time, the remaining original liquid in the pipeline system enters the buffer chamber sequentially along transverse hole 823 and buffer hole under the action of gravity or inertia. After piston disc 72 reaches its maximum displacement position, the volume of metering chamber reaches the preset value, and then the original liquid in metering chamber is metered a second time.

[0049] Reference Figure 3 and Figure 5The control system cuts off the conveying pipe between the quantitative extraction unit 3 and the quantitative cylinder 71. The drive motor 732 drives the push ring 731 to move down, and then the sliding block drives the stop block 813 to disengage from the slot 815. At this time, the positioning of the blocking plate 811 is released. When the push ring 731 continues to move and comes into contact with the push block 725, the push block 725 drives the connecting rod 724 and the piston rod 723 to move, and then pushes the piston plate 72 down. The piston plate 72 applies a thrust to the blocking plate 811 through the original liquid. At this time, the blocking plate 811 gradually moves away from the retaining ring 762, so that the drain hole 814 is connected to the quantitative chamber. The original liquid, which has been quantitatively measured twice, enters the experimental reaction vessel 2 through the drain hole 814.

[0050] Reference Figure 3 and Figure 5 The backwash unit has a recovery pipe 61 connected to its inlet end. One end of the recovery pipe 61 passes through the metering cylinder 71 and is fixedly connected to the piston disc 72. The section of the recovery pipe 61 inside the positioning cylinder is made of flexible material. The upper end of the piston disc 72 has a collection groove 722, where excess raw liquid in the buffer chamber collects. When the backwash unit is working, the raw liquid in the collection groove 722 is extracted through the recovery pipe 61, and the excess raw liquid is returned to the raw liquid storage unit 1, which helps to improve the utilization rate of the raw liquid.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cyanide leaching solution treatment apparatus, comprising a stock solution storage unit (1), an experimental reactor (2), and a piping system for conveying the stock solution in the stock solution storage unit (1) to the experimental reactor (2), characterized in that, Also includes: The quantitative extraction unit (3) is installed on the pipeline system and is used to quantitatively extract the original liquid. The experimental reaction vessel (2) is connected to the liquid outlet of the quantitative extraction unit (3) through the pipeline system. The recycling unit (4) is connected to the experimental reactor (2) through a pipeline system and is used to treat the waste liquid in the experimental reactor (2); The filter unit (5) is set at the raw liquid inlet of the quantitative extraction unit (3) to prevent metals in the raw liquid from entering the quantitative extraction unit (3) when the raw liquid is quantitatively extracted. The backwashing unit (6) is installed on the pipeline system and is located between the liquid inlet of the quantitative extraction unit (3) and the filter unit (5). It is used to drive the raw liquid to flow back to the filter unit (5). A control system is used to control the connection and disconnection of the piping system between various units.

2. The cyanide leaching solution treatment apparatus according to claim 1, characterized in that: The recycling unit (4) includes an activated carbon adsorption layer (421) and an ion exchange resin layer (422). When treating waste liquid, the waste liquid is passed through the activated carbon adsorption layer (421) and the ion exchange resin layer (422) in sequence. The volume ratio of the activated carbon adsorption layer (421) and the ion exchange resin layer (422) is 1:

2.

3. The cyanide leaching solution treatment apparatus according to claim 1, characterized in that: The backwashing unit (6) includes a pulse cleaning device with a working pressure of 0.3-0.5 MPa.

4. The cyanide leaching solution treatment apparatus according to claim 1, characterized in that; The inlet end of the backwashing unit (6) is connected to the outlet end of the recovery treatment unit (4) to transport the recovered raw liquid to the filtration unit (5).

5. The cyanide leaching solution treatment apparatus according to claim 1, characterized in that, Also includes: The quantitative unit (7) is located between the reaction vessel and the quantitative extraction unit (3). The quantitative unit (7) has a quantitative chamber inside. When the raw liquid flows from the quantitative extraction unit (3) to the experimental reaction vessel (2), it passes through the quantitative chamber. The quantitative unit (7) is equipped with a drain restriction unit. Before the raw liquid fills the quantitative chamber, the drain restriction unit restricts the raw liquid from entering the experimental reaction vessel (2). During the process of the raw liquid entering the experimental reaction vessel (2), the drain restriction unit prevents the raw liquid in the pipeline system from entering the quantitative chamber.

6. The cyanide leaching solution treatment apparatus according to claim 5, characterized in that: The metering unit (7) includes a metering cylinder (71), a piston disc (72), and a pusher (73). The metering cylinder (71) is connected between the experimental reactor (2) and the piping system. The discharge restriction unit includes a first restriction part and a second restriction part. The piston disc (72) is located inside the metering cylinder (71). The metering cylinder (71) is divided into two independent chambers with the piston disc (72) as the center. The chamber between the piston disc (72) and the experimental reactor (2) is the metering chamber. The first restriction part is located at the lower end of the metering cylinder (71) and is used to control the flow of liquid. The connection and disconnection between the metering chamber and the experimental reactor (2) are determined. A stop is provided in the metering cylinder (71) to limit the maximum displacement of the piston disc (72). A pusher (73) is provided on the metering cylinder (71) to push the piston disc (72) to move along the axis. A flow channel (721) is opened inside the piston disc (72). A second limiting part is provided on the piston disc (72) to control the connection or disconnection between the flow channel (721) and the metering chamber. The pipeline system is provided with a flexible hose for connecting the flow channel (721).

7. A cyanide leaching solution treatment apparatus according to claim 6, characterized in that: The chamber between the piston disc (72) and the quantitative extraction unit (3) is set as a buffer chamber. The second limiting member controls the connection and disconnection between the flow channel (721) and the buffer chamber. When the second limiting member is in operation, the flow channel (721) is only connected to one of the quantitative chamber or the buffer chamber. The upper end of the piston disc (72) is provided with a collection groove (722) along the circumference. The liquid inlet end of the backwash unit (6) is connected to a recovery pipe (61). The recovery pipe (61) passes through the quantitative cylinder (71) and extends into the collection groove (722).

8. A cyanide leaching solution treatment apparatus according to claim 6, characterized in that: The upper end of the metering cylinder (71) is connected to a buffer cylinder (75), which is made of a deformable material and is used to balance the internal air pressure of the metering cylinder (71).

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