Preparation device of laterite nickel ore acid leaching liquid neutralizer

Abstract

The technical scheme of the present application provides a preparation device for a laterite nickel ore acid leaching solution neutralizer, comprising a preparation part, a buffer part and a partition part. The preparation part is used for mixing and preparing limestone slurry. The buffer part is used for storing the prepared limestone slurry. The partition part is connected to the preparation part at one end and to the buffer part at the other end, and is used for continuously outputting the slurry from the preparation part in a segmented manner into the buffer part, and for impacting the previously stored slurry from all directions by the subsequently injected slurry. The prepared limestone slurry from the preparation part is injected into the buffer part in a segmented manner through the partition part, and the subsequently injected slurry impacts the previously stored slurry from all directions. The segmented injection forms an impact on the already accumulated limestone slurry, avoids excessive precipitation of the limestone slurry caused by long-term standing, guarantees the quality of the limestone slurry stored in the buffer part, and stabilizes the performance of the limestone slurry as a neutralizer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of neutralizing agent preparation, and particularly relates to a preparation device for a neutralizing agent of a laterite nickel ore acid leaching solution. BACKGROUND

[0002] At present, in a laterite nickel ore hydrometallurgy process, the precipitation of nickel and cobalt generally includes first acid leaching of the laterite nickel ore, and then precipitating the nickel and cobalt in the acid leaching solution by using a limestone slurry or lime milk as a neutralizing agent to form a nickel and cobalt precipitation solution.

[0003] In the prior art, there are many devices for preparing the limestone slurry or lime milk. For example, the prior art with the announcement number CN102674714A provides a lime milk preparation device, which comprises a feeding unit, a nitration unit, a dissolving unit, a dust collection unit, a dust removal unit and a recovery unit, and the preparation of the lime milk is completed through the cooperation between the units.

[0004] However, in the preparation of the limestone slurry, most of the existing devices mainly mix the raw materials by using a mixing machine, then transport the limestone slurry and store it in a buffer tank for use. If the buffering time of the buffer tank is too long, the limestone slurry is prone to precipitation, which affects the quality of the limestone slurry. Therefore, in order to ensure the speed of following the production line and avoid the precipitation in the buffer, the preparation device for the limestone slurry is improved. SUMMARY

[0005] Therefore, it is necessary to provide a preparation device for a neutralizing agent of a laterite nickel ore acid leaching solution to solve the technical problem that the limestone slurry is prone to precipitation due to the long buffering time of the limestone slurry in the buffer tank in the prior art.

[0006] To achieve the above technical purposes, the technical scheme of the present application provides a preparation device for a neutralizing agent of a laterite nickel ore acid leaching solution, which comprises:

[0007] a preparation part for mixing and preparing the limestone slurry;

[0008] a buffer part for storing the prepared limestone slurry; and

[0009] a partition part, one end of which is connected to the preparation part and the other end of which is connected to the buffer part, for continuously outputting the slurry from the preparation part into the buffer part in a segmented manner, and for impacting the slurry stored in the buffer part from all directions by the subsequent slurry.

[0010] Further, the partition part comprises a partition, a control assembly, a conveying pipeline and a conveying pump, the conveying pump is arranged on the conveying pipeline and used for pumping the slurry in the partition and conveying the slurry to the buffer part, and the control assembly is used for controlling the communication between the partition and the conveying pipeline.

[0011] Further, the number of the compartments is two, the conveying pipeline is a three-way pipeline, three ends of the three-way pipeline are connected with the two compartments and the buffer part respectively, a three-way valve is arranged between the top of the two compartments, the three-way valve is used for being connected with the preparation part, the control assembly is used for controlling switching of the two compartments and the conveying pipeline in communication and switching of the three-way valve in communication between the preparation part and the compartments.

[0012] Further, the buffer part comprises a buffer tank and a shunt pipeline, a plurality of shunt pipelines are circumferentially arranged on the outer periphery of the buffer tank, the shunt pipelines are arranged on the inner side of the buffer tank at an angle with the inner wall of the buffer tank, the shunt pipelines extend upward at an elevation angle and are curved toward the circumferential distribution center.

[0013] Further, the compartments are arranged at the bottom of the buffer tank, a confluence box is arranged between the bottom ends of the plurality of shunt pipelines, the confluence box is connected and communicated with the output end of the compartment part.

[0014] Further, the control assembly comprises a liquid level monitoring member, a control member and control valves, the two control valves are arranged at the connection between the three-way pipeline and the corresponding compartments respectively, the control member opens and closes the control valves and controls switching of the passage of the three-way valve according to the liquid level feedback of the liquid level monitoring member.

[0015] Further, the liquid level monitoring member comprises a floating plate and a touch pressure frame, the floating plate is arranged to float in the compartment, the touch pressure frame is arranged on the top of the floating plate, and the touch pressure frame penetrates the compartment upward and is slidably connected with the compartment.

[0016] Further, the liquid level monitoring member comprises a liquid level sensor.

[0017] Further, the control member comprises a touch frame and control buttons, the two control buttons are arranged on the inner top wall and the inner bottom wall of the touch frame, the control button on the top is pressed to control the control valve at the liquid discharge of the corresponding side compartment to be opened and the three-way valve to switch the passage to the adjacent compartment, and the control button on the bottom is pressed to control the control valve at the liquid discharge of the corresponding side compartment to be closed.

[0018] Further, the control member comprises a programmable controller, the liquid level sensor, the three-way valve and the control valve are electrically connected with the programmable controller.

[0019] Compared with the prior art, the present application has the beneficial effects that: the limestone slurry prepared by the preparation part is segmentedly filled into the buffer part through the compartment part, and the slurry filled in the front is impacted from all directions by the subsequent filling of the slurry, the segmented filling is used to form the impact on the accumulated limestone slurry, the excessive precipitation of the limestone slurry caused by long-time standing is avoided, the quality of the limestone slurry stored in the buffer part is ensured, and the performance of the limestone slurry as a neutralizing agent in the subsequent stage is stabilized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of a laterite nickel ore acid leaching solution neutralizing agent preparation device according to an embodiment of the present application;

[0021] Figure 2 is a structural schematic view of a compartment part and a buffer part according to an embodiment of the present application;

[0022] Figure 3 is a three-dimensional view of a buffer part according to an embodiment of the present application;

[0023] Figure 4 is a bottom view of a buffer part according to an embodiment of the present application;

[0024] Figure 5 is a top view of a buffer part according to an embodiment of the present application;

[0025] Fig. 1, preparation part;

[0026] 2, compartment part; 21, compartment; 22, control assembly; 23, conveying pipeline; 24, conveying pump; 25, three-way valve;

[0027] 221, liquid level monitoring member; 2211, floating plate; 2212, touch pressure frame; 222, control member; 2221, touch frame; 2222, control button; 223, control valve;

[0028] 3, buffer part; 31, buffer tank; 32, shunt pipeline; 33, converging box. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, which form a part of this application. The accompanying drawings and the embodiments together illustrate the principles of the present application, but are not intended to limit the scope of the present application.

[0030] As Figures 1-5As shown, the present application provides a device for preparing a neutralizer for acid leaching solution of laterite nickel ore, which comprises a preparation part 1, a buffer part 3 and a partition part 2. The preparation part 1 is used for mixing and preparing limestone slurry. The buffer part 3 is used for storing the prepared limestone slurry. The preparation part 1 is connected to the buffer part 3 at one end and the other end, which is used to continuously output the slurry from the preparation part 1, and the slurry is segmentedly filled into the buffer part 3. The subsequent filling slurry impacts the previously stored slurry from all around, and the segmented filling forms an impact on the accumulated limestone slurry, which avoids excessive precipitation of limestone slurry caused by long-term standing, and ensures the quality of limestone slurry stored in the buffer part 3 and the performance of the subsequent neutralizer.

[0031] Specifically, the preparation part 1 prepares the limestone slurry according to the following process. The limestone raw material is conveyed to the feeder from the limestone feeding bin. The feeder supplies a preset amount of limestone raw material to the transmission belt within a unit time. The transmission belt transfers the limestone raw material to the elevator. The elevator delivers the limestone raw material to the mill. The mill grinds the limestone raw material into limestone powder and transmits the limestone powder to another elevator. The elevator delivers the limestone powder to the limestone powder storage tank. The rotor scale quantitatively weighs and grabs the limestone powder from the limestone powder storage tank. The limestone powder is mixed with water in the mixer to form a preliminary limestone slurry. The mixer mixes the limestone powder and water to form the limestone slurry. The delivery pump delivers the limestone slurry. Finally, the limestone slurry is delivered to the partition part 2. The limestone slurry is buffered in the partition part 2 and will not be buffered for a long time. The slurry is intermittently filled into the buffer part to form a segmented impact on the limestone slurry stored in the buffer part 3, which generates an impact on the internal limestone slurry and forms a turbulent flow.

[0032] In one embodiment, in order to form a basic segmented impact, the partition part 2 comprises a partition 21, a control assembly 22, a delivery pipeline 23 and a delivery pump 24. The delivery pump 24 is arranged on the delivery pipeline 23 and used to extract the slurry in the partition 21 and deliver it to the buffer part 3. The control assembly 22 is used to control the communication between the partition 21 and the delivery pipeline 23. According to the above components, it is known that if the control assembly 22 controls the communication interval between the partition 21 and the delivery pipeline 23, the segmented filling of the slurry can be formed. When the slurry is filled into the buffer part 3, a segmented impact is formed.

[0033] It can be understood that in the basic segmented impact, a time control switch can be used to set the interval time, and the delivery pipeline 23 and the delivery pump 24 can be opened synchronously. However, the basic segmented impact needs to be manually controlled when the production line is variable speed.

[0034] In one embodiment, in order to control the amount of slurry injected in each segment, the number of compartments 21 is two, and the capacity of one compartment 21 is the amount of slurry injected into the buffer 3 in one injection. The delivery pipeline 23 is a three-way pipeline, and the three ends of the three-way pipeline are connected to the two compartments 21 and the buffer 3, respectively. A three-way valve 25 is arranged between the top of the two compartments 21, and the three-way valve 25 is used to connect to the preparation part 1. The control assembly 22 is used to control the switching of the two compartments 21 and the delivery pipeline 23, and the switching of the three-way valve 25 between the preparation part 1 and the compartments 21. In use, the three-way valve 25 connects one side of the compartment 21 to the preparation part 1, and the preparation part 1 injects the slurry into the compartment 21. After the compartment 21 is filled, the control assembly 22 switches the preparation part 1 to connect to the other side of the compartment 21 to inject the slurry, so as to maintain continuous injection of the slurry and connect the production line for continuous production of the slurry. At the same time, after the slurry in one side of the compartment 21 is filled, the compartment 21 is connected to the delivery pipeline 23, and the slurry in the compartment 21 is injected into the buffer 3 in one injection. The amount of slurry injected into the buffer 3 in one injection is controlled according to the capacity of the compartment 21.

[0035] It can be understood that, in the two-compartment 21 switching injection, the capacity of the compartment 21 controls the amount of slurry injected in one injection. In variable-speed injection, only the delivery rate of the delivery pump 24 needs to be adjusted, and other factors do not need to be controlled. The compartment 21 is filled and pressurized to deliver the slurry, so as to obtain the segmented injection with stable flow rate when the production line is variable-speed, and the segmented injection is convenient to adjust adaptively with the variable speed of the production line. In this injection mode, the time-controlled switch is not used for control, and the liquid level is monitored for control.

[0036] Further, in order to match the liquid level monitoring of the compartment 21 and the control of the transfer of the slurry, the control assembly 22 includes a liquid level monitoring member 221, a control member 222, and control valves 223. The two control valves 223 are arranged at the connection between the three-way pipeline and the corresponding compartments 21, and are opened to be connected and closed to be disconnected. The control member 222 controls the opening and closing of the control valves 223 according to the liquid level feedback of the liquid level monitoring member 221, and controls the switching of the three-way valve 25. In use, when the compartment 21 is filled to a set liquid level, the corresponding control valve 223 is opened, the delivery pump 24 delivers the slurry, and the three-way valve 25 is switched to connect to the other side of the compartment 21 to inject the slurry into the other side of the compartment 21. The two compartments 21 are alternately used.

[0037] It can be understood that the time for filling the limestone slurry into the interval compartment 21 is the interval time for the segmented injection into the buffer part 3, when the production line limestone slurry production speed increases, the speed of filling the limestone slurry into the interval compartment 21 becomes faster, and the interval time is automatically shortened, and the automatic adaptive adjustment is performed following the change of the production line speed.

[0038] Optionally, in order to achieve the purpose of liquid level monitoring, the liquid level monitoring member 221 comprises a liquid level sensor for monitoring the highest point and the lowest point of the liquid level.

[0039] Further, the control member 222 comprises a programmable controller, and the liquid level sensor, the three-way valve 25 and the control valve 223 are electrically connected with the programmable controller.

[0040] It can be understood that the programmable controller controls the liquid level sensor, the three-way valve 25 and the control valve 223 by using the existing technology in the art for simple operation, which belongs to a simple existing control program.

[0041] It can be understood that although the liquid level sensor can achieve the purpose of liquid level monitoring, it is prone to failure after long-term use in the limestone slurry, and the use and maintenance cost is high.

[0042] Optionally, in order to facilitate maintenance and use, the liquid level monitoring member 221 comprises a floating plate 2211 and a touch pressure frame 2212, the floating plate 2211 is floatingly arranged in the interval compartment 21 and floats on the surface of the limestone slurry, the touch pressure frame 2212 is arranged on the top of the floating plate 2211, and the touch pressure frame 2212 penetrates the interval compartment 21 upward and is slidably connected with the interval compartment 21, and in the lifting of the floating plate 2211, the touch pressure frame 2212 is lifted.

[0043] Further, the control member 222 comprises a touch frame 2221 and control buttons 2222, two control buttons 2222 are arranged on the inner top wall and the inner bottom wall of the touch frame 2221 and correspond to the highest point and the lowest point of the liquid level respectively, and the control button 2222 on the top is pressed to control the control valve 223 at the liquid discharge position of the interval compartment 21 on the corresponding side to be opened, and the three-way valve 25 is switched to the adjacent interval compartment 21.

[0044] In use, limestone slurry is injected into the compartment 21, the floating plate 2211 rises, the touch pressure frame 2212 moves up, moves to the control button 2222 at the top of the touch pressure, thereby opening the control valve 223 on the compartment 21, connecting the three-way pipeline to inject slurry into the buffer part 3, and switching the three-way valve to the adjacent compartment 21 and the preparation part 1; after injecting the slurry, the floating plate 2211 descends, the touch pressure frame 2212 moves down, moves to the control button 2222 at the bottom of the touch pressure, thereby closing the control valve 223 at the slurry discharge of the compartment 21.

[0045] It can be understood that the controls of the control structure are all located outside the compartment 21, and the floating plate 2211 and the touch pressure frame 2212 are also not prone to failure in the compartment 21, and the cost is relatively low, which is more convenient for maintenance and use.

[0046] Among them, the tail end of each shunt pipeline 32 is provided with a one-way valve to prevent the backflow of limestone slurry.

[0047] In an embodiment, in order to form a spiral upward impingement turbulent flow, the buffer part 3 comprises a buffer tank 31 and a shunt pipeline 32, a plurality of shunt pipelines 32 are circumferentially distributed on the outer periphery of the buffer tank 31, and the shunt pipeline 32 has an included angle with the inner wall of the buffer tank 31 and is cut into the inner side of the buffer tank 31, and the shunt pipeline 32 has an upward angle and extends upward with an arc curvature towards the circumferentially distributed center, thereby forming an injection track extending upward along an inward arc line, forming a spiral upward impingement turbulent flow, thereby promoting the upward turbulent disturbance of the limestone slurry and reducing the sedimentation.

[0048] Optionally, the included angle of the cut-in is thirty degrees, the upward angle is thirty degrees, and the radian is twenty-five degrees.

[0049] Further, in order to evenly distribute and flow each shunt pipeline 32, the compartment 21 is arranged at the bottom of the buffer tank 31, a plurality of shunt pipelines 32 are arranged between the bottom ends of the shunt pipelines 32, and a flow box 33 is arranged between the bottom ends of the shunt pipelines 32, the flow box 33 is connected to and communicates with the output end of the compartment part, wherein the output end of the three-way pipeline is connected to the bottom of the flow box 33 and injects upward, and the shunt pipelines 32 are evenly distributed on the side surface of the flow box 33, thereby forming a pipeline distribution with the same conveying length at the shunt pipelines 32, and evenly distributing the flow rate and flow of each branch injected into the buffer tank 31.

[0050] The specific workflow of the present application: the preparation part 1 continuously prepares the limestone slurry to the compartment part 2, first injects the compartment 21 on one side, when the injection reaches the set height, the top control button 2222 is pressed by the touch pressure frame 2212, the bottom control valve 223 is opened, the slurry is transported to the buffer tank 31 by the delivery pump 24, and at the same time the three-way valve 25 is switched to the adjacent compartment 21, the slurry of the preparation part 1 is continuously switched to the other compartment 21, when the slurry in the compartment 21 for delivering slurry to the buffer tank 31 is empty, the bottom control valve 223 is closed, when the other compartment 21 is full of slurry, the above principle is followed to achieve the purpose of switching the slurry injection and output of the two compartments 21, and the buffer tank 31 is formed by segment injection; the shunt pipeline 32 is arranged around the buffer tank 31, which has a cutting angle cutting into the tank body, an elevation angle rising upward to the tank body and an arc bending into the tank body, under the cooperation of the limestone slurry injection of multiple circumferentially distributed shunt pipelines 32, the spiral upward turbulent flow is formed, and the limestone slurry precipitation in the buffer tank 31 is reduced.

[0051] The entire workflow is completed, and the contents not described in detail in the specification all belong to the prior art known to those skilled in the art.

[0052] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for preparing a neutralizer of an acid leaching solution of a laterite nickel ore, characterized in that, The application relates to a limestone slurry preparation system, which comprises a preparation part for mixing and preparing limestone slurry, a buffer part for storing the prepared limestone slurry, and a buffer part connected to one end of the preparation part and the other end of the buffer part, which is used for continuously outputting the slurry prepared by the preparation part into the buffer part in a segmented mode, and the subsequent slurry injection generates impact on the periphery of the previously stored slurry, wherein the buffer part comprises a buffer tank and a plurality of shunt pipelines which are circumferentially arranged on the outer periphery of the buffer tank, and the shunt pipelines are arranged on the inner side of the buffer tank at an angle with the inner wall of the buffer tank, and the shunt pipelines are upwardly extended at an angle and are curved towards the circumferential distribution center to form an injection track which is upwardly extended along an arc line. The number of the buffer tanks is two, the shunt pipeline is a three-way pipeline, the three ends of the three-way pipeline are connected with the two buffer tanks and the buffer part, a three-way valve is arranged between the top of the two buffer tanks, the three-way valve is used for being connected with the preparation part, the control assembly is used for switching the communication between the two buffer tanks and the shunt pipeline and switching the communication between the preparation part and the buffer tanks through the three-way valve. The buffer tank is arranged at the bottom of the buffer tank, a plurality of shunt pipelines are arranged between the bottom ends of the shunt pipelines, and a confluence box is arranged between the bottom ends of the shunt pipelines. The control assembly comprises a liquid level monitoring element, a control element and control valves, the control valves are arranged at the connection positions of the three-way pipeline and the corresponding buffer tanks, the control element opens and closes the control valves according to the liquid level feedback of the liquid level monitoring element, and the control element controls the switching of the passage of the three-way valve. The liquid level monitoring element comprises a floating plate and a touch pressure frame, the floating plate is arranged to float in the buffer tank, the touch pressure frame is arranged on the top of the floating plate, and the touch pressure frame penetrates the buffer tank upwardly and is slidably connected with the buffer tank. The liquid level monitoring element comprises a liquid level sensor. The control element comprises a touch frame and control buttons, the control buttons are arranged on the inner top wall and the inner bottom wall of the touch frame, the control buttons on the top are pressed to control the opening of the control valve at the liquid discharge position of the corresponding buffer tank and control the switching of the passage of the three-way valve to the adjacent buffer tank, and the control buttons on the bottom are pressed to control the closing of the control valve at the liquid discharge position of the corresponding buffer tank.

2. The laterite nickel ore acid leach liquor neutralizer preparation device according to claim 1, characterized by, The control element comprises a programmable controller, and the liquid level sensor, the three-way valve and the control valve are electrically connected with the programmable controller.

3. The laterite nickel ore acid leaching solution neutralizer preparation device according to claim 1, characterized in that, ​ 4. The laterite nickel ore acid leaching solution neutralizer preparation device according to claim 2, characterized in that, ​ 5. The laterite nickel ore acid leach solution neutralizer preparation device according to claim 4, characterized in that, ​ 6. The laterite nickel ore acid leaching solution neutralizer preparation device according to claim 4, characterized in that, ​ 7. The laterite nickel ore acid leach solution neutralizer preparation device according to claim 6, characterized in that, ​ 8. The laterite nickel ore acid leaching solution neutralizer preparation device according to claim 7, characterized in that, ​

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