Preparation device for neutralizing agent for laterite nickel ore acid-leaching solution

Abstract

The technical solution of the present invention provides a preparation device for a neutralizing agent for a laterite nickel ore acid-leaching solution, comprising a preparation part, a buffer part, and a compartment part. The preparation part is used for mixing and preparing limestone slurry; the buffer part is used for storing the produced limestone slurry; and the compartment part has one end connected to the preparation part and the other end connected to the buffer part, and is used for stepwise pouring the slurry continuously produced by the preparation part into the buffer part and using the subsequently poured slurry to impact the previously stored slurry from the periphery. According to the present invention, the compartment part stepwise pours the limestone slurry prepared in the preparation part into the buffer part, and uses the subsequently poured slurry to impact the previously stored slurry from the periphery, namely, the stepwise injection forms impact on the stored limestone slurry, thereby avoiding excessive precipitation of the limestone slurry caused by long-time standing, guaranteeing the quality of the limestone slurry stored in the buffer part, and stabilizing the properties of the limestone slurry which serves as a neutralizing agent subsequently.

Description

A device for preparing a neutralizing agent for laterite nickel ore acid leaching solution Technical Field

[0001] The invention relates to the technical field of neutralizer preparation, in particular to a device for preparing a neutralizer for laterite nickel ore acid leaching solution. Background Art

[0002] Currently, in the laterite nickel ore wet smelting process, the precipitation of nickel and cobalt usually includes first acid leaching the laterite nickel ore, and then using limestone slurry or lime milk as a neutralizer to precipitate the nickel and cobalt in the acid leaching solution to form a nickel-cobalt precipitate.

[0003] In the prior art, there are many devices for preparing limestone slurry or lime milk. For example, prior art publication No. CN102674714A provides a lime milk preparation device comprising a feeding unit, a nitrification unit, a dissolution unit, a dust collection unit, a dust removal unit, and a recovery unit. The units cooperate to complete the preparation of lime milk.

[0004] However, in existing limestone slurry preparation, the raw materials are usually mixed in a mixer, the limestone slurry is then transported, and the slurry is stored in a buffer tank until it is used. If the buffer tank is kept for too long, it can easily cause sedimentation, affecting the quality of the limestone slurry. Therefore, in order to ensure sufficient follow-up production line speed during the mixing process and to avoid sedimentation in the buffer, an improvement is proposed in this paper to prepare limestone slurry.

[0005] Summary of the Invention

[0006] In view of this, it is necessary to provide a device for preparing a neutralizer for laterite nickel ore acid leaching solution to solve the technical problem in the prior art that the limestone slurry is buffered in a buffer tank for too long, which easily leads to precipitation.

[0007] In order to achieve the above technical objectives, the technical solution of the present invention provides a device for preparing a neutralizing agent for a laterite nickel ore acid leachate, comprising:

[0008] Preparation department, used for mixing and preparing limestone slurry;

[0009] Buffer section, used to store produced limestone slurry; and

[0010] The partition part has one end connected to the preparation part and the other end connected to the buffer part, and is used to pour the slurry continuously produced by the preparation part into the buffer part in sections, and use the subsequent slurry to impact the slurry stored in the front from all sides.

[0011] Furthermore, the partition portion includes a partition, a control component, a delivery pipeline and a delivery pump. The delivery pump is arranged on the delivery pipeline to extract the slurry in the partition and deliver it to the buffer portion. The control component is used to control the communication between the partition and the delivery pipeline.

[0012] Furthermore, the number of the partitions is two, the delivery pipeline is a three-way pipeline, the three ends of the three-way pipeline are respectively connected to the two partitions and the buffer part, a three-way valve is provided between the tops of the two partitions, the three-way valve is used to connect with the preparation part, and the control component is used to control the switching of the connection between the two partitions and the delivery pipeline, as well as the switching of the connection between the three-way valve between the preparation part and the partition.

[0013] Furthermore, the buffer portion includes a buffer tank and a diversion pipe, and several of the diversion pipes are arranged in a circular distribution on the outer circumference of the buffer tank, and the diversion pipes cut into the inner side of the buffer tank at an angle with the inner wall of the buffer tank, and the diversion pipes extend upward at an elevation angle and bend in an arc toward the center of the circumferential distribution circle.

[0014] Furthermore, the partition is arranged at the bottom of the buffer tank, and a junction box is provided between the bottom ends of a plurality of the branch pipelines, and the junction box is connected to and communicated with the output end of the partition.

[0015] Furthermore, the control component includes a liquid level monitoring component, a control component and a control valve. The two control valves are respectively arranged at the connection between the three-way pipeline and the corresponding compartment. The control component opens and closes the control valve according to the liquid level feedback of the liquid level monitoring component, and controls the path switching of the three-way valve.

[0016] Furthermore, the liquid level monitoring component includes a floating plate and a touch pressure frame, the floating plate is floated in the compartment, the touch pressure frame is arranged on the top of the floating plate, and the touch pressure frame upwardly penetrates the compartment and is slidably connected thereto.

[0017] Furthermore, the liquid level monitoring component includes a liquid level sensor.

[0018] Furthermore, the control component includes a touch frame and a control button, and the two control buttons are arranged on the inner top wall and the inner bottom wall of the touch frame. The top control button is pressed to control the control valve at the drainage of the corresponding compartment to open, and to control the three-way valve to switch the passage to the adjacent compartment. The bottom control button is pressed to control the control valve at the drainage of the corresponding compartment to close.

[0019] Furthermore, the control component includes a programmable controller, and the liquid level sensor, three-way valve and control valve are all electrically connected to the programmable controller.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the limestone slurry prepared in the preparation part is poured into the buffer part in sections through the partition part, and the slurry poured in subsequently impacts the previously stored slurry from all sides. The segmented injection is used to impact the accumulated limestone slurry, thereby avoiding excessive precipitation of the limestone slurry caused by long-term standing, ensuring the quality of the limestone slurry when stored in the buffer part, and stabilizing the performance of the limestone slurry as a neutralizer in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a device for preparing a neutralizing agent for laterite nickel ore acid leaching solution according to an embodiment of the present invention;

[0022] FIG2 is a schematic structural diagram of a partition portion and a buffer portion according to an embodiment of the present invention;

[0023] FIG3 is a three-dimensional diagram of the structure of the buffer portion according to an embodiment of the present invention;

[0024] FIG4 is a bottom view of a buffer portion according to an embodiment of the present invention;

[0025] FIG5 is a top view of a buffer portion according to an embodiment of the present invention;

[0026] In the figure: 1. Preparation department;

[0027] 2. Partition unit; 21. Partition; 22. Control assembly; 23. Delivery pipeline; 24. Delivery pump; 25. Three-way valve;

[0028] 221, liquid level monitoring component; 2211, floating plate; 2212, touch pressure frame; 222, control component; 2221, touch control frame; 2222, control button; 223, control valve;

[0029] 3. Buffer unit; 31. Buffer tank; 32. Diversion pipeline; 33. Junction box. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0031] As shown in Figures 1-5, the present invention provides a device for preparing a neutralizer for laterite nickel ore acid leachate, comprising a preparation part 1, a buffer part 3 and a compartment part 2, wherein the preparation part 1 is used for mixing and preparing limestone slurry; the buffer part 3 is used for storing the produced limestone slurry; the preparation part 1 is connected at one end to the preparation part 1 and at the other end to the buffer part 3, and is used to inject the slurry continuously produced by the preparation part 1 into the buffer part 3 in stages, and to use the subsequent injected slurry to impact the previously stored slurry from all sides, and utilize the staged injection to form an impact on the accumulated limestone slurry, thereby avoiding excessive precipitation of the limestone slurry caused by long-term standing, ensuring the quality of the limestone slurry when stored in the buffer part 3, and stabilizing its subsequent performance as a neutralizer.

[0032] Specifically, the preparation part 1 prepares limestone slurry according to the following process: the limestone lower hopper conveys the limestone raw material to the feeder, the feeder supplies a preset amount of limestone raw material to the transmission belt within unit time, the transmission belt transfers the limestone raw material to the elevator, the elevator conveys the limestone raw material to the grinding mill, the grinding mill grinds the limestone raw material into limestone powder, and conveys the limestone powder to another elevator, the elevator conveys the limestone powder to the limestone powder storage tank, the rotor scale quantitatively weighs the limestone powder storage tank quantitatively grabs the limestone powder, 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 limestone slurry, the delivery pump conveys the limestone slurry, and finally the limestone slurry is conveyed to the partition part 2. The limestone slurry in the compartment 2 is buffered and will not be buffered for a long time. The slurry is intermittently poured into the buffer part to form a segmented impact on the limestone slurry stored in the buffer part 3, which impacts the internal limestone slurry and forms turbulence.

[0033] In a certain embodiment, in order to form a basic segmented impact, the partition portion 2 includes a partition 21, a control component 22, a delivery pipeline 23 and a delivery pump 24. The delivery pump 24 is arranged on the delivery pipeline 23, and is used to extract the slurry in the partition 21 and deliver it to the buffer portion 3. The control component 22 is used to control the connection between the partition 21 and the delivery pipeline 23. According to the above components, it can be known that if the control component 22 controls the connection interval between the partition 21 and the delivery pipeline 23 for a period of time, a segmented injection of slurry can be formed, that is, when injecting into the buffer portion 3, a segmented impact is formed.

[0034] It is understandable that in the basic segmented impact, a time-controlled switch can be used to set the interval time and synchronously open the connection of the delivery pipeline 23 and the delivery pump 24. However, the basic segmented impact requires manual control when the production line changes speed.

[0035] In a certain embodiment, in order to facilitate the control of the amount of slurry injected in a single time during the segmented injection, the number of the partitions 21 is two, and the capacity of one partition 21 is the amount of limestone slurry injected into the buffer part 3 at one time, wherein the conveying pipeline 23 is a three-way pipeline, and the three ends of the three-way pipeline are respectively connected to the two partitions 21 and the buffer part 3, and a three-way valve 25 is provided between the tops of the two partitions 21, and the three-way valve 25 is used to connect with the preparation part 1, and the three-way valve 25 is used to switch the two partitions 21 to be connected to the preparation part 1 separately, and the control component 22 is used to control the switching of the connection between the two partitions 21 and the conveying pipeline 23, as well as the switching of the injected slurry of the three-way valve 25 between the preparation part 1 and the partition 21. During use, the three-way valve 25 connects the partition chamber 21 on one side with the preparation section 1, so that the preparation section 1 injects limestone slurry into the interior thereof. After the filling, the control component 22 switches the preparation section 1 to connect to the partition chamber 21 on the other side to inject the slurry, maintains continuous slurry injection, and connects the production line for continuous production of limestone slurry. At the same time, after the limestone slurry on one side is filled, the partition chamber 21 is connected with the conveying pipeline 23, and the limestone slurry inside it is injected into the buffer section 3 at one time, and the amount of limestone slurry injected into the buffer section 3 at a single time is controlled according to the capacity of the partition chamber 21.

[0036] It can be understood that when the two compartments 21 are switched for injection, the capacity of the compartment 21 controls the amount of a single injection. During variable speed injection, it is only necessary to adjust the delivery rate of the delivery pump 24 without additional control of other factors. When the compartment 21 is filled, pressurized delivery can be performed to obtain a segmented injection with a stable flow rate when the production line changes speed, which is convenient for adaptive adjustment as the production line changes speed. In this injection mode, a time-controlled switch is not used for control, and liquid level monitoring can be used for coordinated control.

[0037] Furthermore, in order to match the liquid level monitoring of the compartment 21 and the control of the limestone slurry transfer, the control assembly 22 includes a liquid level monitoring component 221, a control component 222, and a control valve 223. The two control valves 223 are respectively arranged at the connection between the three-way pipeline and the corresponding compartment 21. When opened, they are connected, and when closed, they are disconnected. The control component 222 opens and closes the control valve 223 according to the liquid level feedback of the liquid level monitoring component 221, and controls the path switching of the three-way valve 25. In use, when the compartment 21 is filled to the set liquid level height, the corresponding control valve 223 is opened, the limestone slurry is transported by the delivery pump 24, and the three-way valve 25 is switched to connect to the other side compartment 21 at the same time, and the limestone slurry is injected into the other side compartment 21. The two compartments 21 are operated alternately.

[0038] It can be understood that the time it takes for the partition chamber 21 to be filled with limestone slurry is the interval time of the segmented injection into the buffer section 3. When the production speed of the limestone slurry on the production line increases, the speed at which the limestone slurry fills the partition chamber 21 becomes faster, and the interval time is automatically shortened, and automatic adaptive adjustment is performed following the changes in the production line speed.

[0039] Optionally, in order to achieve the purpose of liquid level monitoring, the liquid level monitoring component 221 includes a liquid level sensor, which is used to monitor the highest point and the lowest point of the liquid level.

[0040] Furthermore, the control component 222 includes a programmable controller, and the liquid level sensor, three-way valve 25 and control valve 223 are all electrically connected to the programmable controller. The programmable controller receives the liquid level height signal of the liquid level sensor and controls the opening and closing of the three-way valve 25 and the control valve 223.

[0041] It is understandable that the programmable controller can simply control the liquid level sensor, the three-way valve 25 and the control valve 223 using existing technologies in the art, which is a simple existing control program.

[0042] It is understandable that although the liquid level sensor can achieve the purpose of liquid level monitoring, it is prone to malfunction during long-term use due to long-term immersion in limestone slurry, and the cost of use and maintenance is high.

[0043] This embodiment is optional. To facilitate maintenance and use, the liquid level monitoring component 221 includes a floating plate 2211 and a touch pressure frame 2212. The floating plate 2211 is floated in the partition 21 and floats on the surface of the limestone slurry. The touch pressure frame 2212 is set on the top of the floating plate 2211, and the touch pressure frame 2212 passes through the partition 21 upward and is slidably connected thereto. When the floating plate 2211 rises and falls, the touch pressure frame 2212 is driven to rise and fall.

[0044] Furthermore, the control component 222 includes a touch frame 2221 and a control button 2222. The two control buttons 2222 are arranged on the inner top wall and the inner bottom wall of the touch frame 2221, corresponding to the highest point and the lowest point of the liquid level respectively. The top control button 2222 is pressed to control the control valve 223 at the discharge of the partition 21 on the corresponding side to open, and controls the three-way valve 25 to switch the passage to the adjacent partition 21. The bottom control button 2222 is pressed to control the control valve 223 at the discharge of the partition 21 on the corresponding side to close.

[0045] During use, limestone slurry is injected into the partition 21, causing the float 2211 to rise, the pressure frame 2212 to move upward, and move to the control button 2222 at the top to press, thereby opening the control valve 223 on the partition 21, connecting the three-way pipeline to inject slurry into the buffer part 3, and switching the three-way valve to connect the adjacent partition 21 with the preparation part 1; after the slurry is injected, the float 2211 descends, the pressure frame 2212 moves downward, and moves to the control button 2222 at the bottom to press, thereby closing the control valve 223 at the drainage of the partition 21.

[0046] It can be understood that the control components of the control structure are all located outside the compartment 21, and the floating plate 2211 and the contact pressure frame 2212 are less likely to malfunction inside the compartment 21, and the cost is low, which is easier to maintain and use.

[0047] A one-way valve is provided at the tail end of each branch pipe 32 to prevent the limestone slurry from flowing back.

[0048] In a certain embodiment, in order to form a spiral upward impact turbulence, the buffer portion 3 includes a buffer tank 31 and a diversion pipe 32, and several of the diversion pipes 32 are arranged in a circular distribution on the outer circumference of the buffer tank 31, and the diversion pipes 32 and the inner wall of the buffer tank 31 have an angle and cut into the inner side of the buffer tank 31, and the diversion pipes 32 extend upward at an elevation angle and bend in a circular arc toward the center of the circumferential distribution circle, thereby forming an injection track extending upward in an inward arc, and forming a spiral upward impact turbulence with multiple injected slurry flow paths, thereby promoting upward turbulent disturbance of the limestone slurry and reducing precipitation.

[0049] Optionally, the included angle of the cut is thirty degrees, the elevation angle is thirty degrees, and the arc is twenty-five degrees.

[0050] Furthermore, in order to uniformly distribute and flow each diversion pipeline 32, the partition chamber 21 is arranged at the bottom of the buffer tank 31, and a junction box 33 is provided between the bottom ends of several of the diversion pipelines 32. The junction box 33 is connected and communicated with the output end of the partition chamber, wherein the output end of the three-way pipeline is connected to the bottom of the junction box 33 and injected upward, while the diversion pipelines 32 are evenly distributed on the side of the junction box 33, thereby forming a pipeline distribution with the same delivery length at the diversion pipeline 32, uniformizing the flow rate and flow of each branch injected into the buffer tank 31.

[0051] The specific working process of the present invention is as follows: the preparation part 1 continuously prepares limestone slurry to the compartment part 2, and first injects it into the compartment 21 on one side. When the injection reaches the set height, the pressure frame 2212 presses the top control button 2222 to open the bottom control valve 223, and 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 used to switch to the adjacent compartment 21, and the slurry of the preparation part 1 is continuously switched to the other compartment 21 for injection. When the slurry in the compartment 21 that transports the slurry to the buffer tank 31 reaches the bottom, the bottom control valve 223 is closed. The control valve 223 is turned on, and when the other compartment 21 is filled with slurry, the process is carried out according to the above principle to achieve the purpose of switching the two compartments 21 to inject slurry and output slurry, forming a segmented injection of the buffer tank 31; a diversion pipeline 32 is arranged around the buffer tank 31, which has a cutting angle cutting into the tank body, an elevation angle rising toward the tank body and an arc bending into the tank body. With the cooperation of the limestone slurry injection of multiple circumferentially distributed diversion pipelines 32, a spiral upward turbulence is formed to reduce the precipitation of the limestone slurry in the buffer tank 31.

[0052] The entire workflow is complete, and all contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A preparation device for a neutralizing agent of laterite nickel ore acid leaching solution, Characterized in that, Comprising: A preparation part for mixing and preparing limestone slurry; A buffer part for storing the produced limestone slurry; And A partition part, one end of which is connected to the preparation part and the other end is connected to the buffer part, for pouring the slurry continuously produced by the preparation part into the buffer part in a segmented manner, and using the subsequently poured slurry to impact the previously stored slurry from all around.

2. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 1, Characterized in that, The partition part includes a partition, a control component, a conveying pipeline and a conveying pump. The conveying pump is arranged on the conveying pipeline for pumping the slurry in the partition and conveying it to the buffer part, and the control component is used to control the connection between the partition and the conveying pipeline.

3. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 2, Characterized in that, The number of the partitions is two, the conveying pipeline is a three-way pipeline, three ends of the three-way pipeline are respectively connected to the two partitions and the buffer part, a three-way valve is arranged between the tops of the two partitions, the three-way valve is used to connect to the preparation part, and the control component is used to control the switching of the connection between the two partitions and the conveying pipeline, and the switching of the connection between the preparation part and the three-way valve of the partition.

4. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 1, Characterized in that, The buffer part includes a buffer tank and a shunt pipeline. A plurality of the shunt pipelines are arranged on the outer periphery of the buffer tank in a circumferential distribution, and the shunt pipeline cuts into the inner side of the buffer tank at an angle with the inner wall of the buffer tank, and the shunt pipeline extends upward with an elevation angle and bends in an arc shape towards the center of the circumferential distribution.

5. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 4, Characterized in that, The partition is arranged at the bottom of the buffer tank, a confluence box is arranged between the bottom ends of a plurality of the shunt pipelines, and the confluence box is connected and communicated with the output end of the partition part.

6. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 3, Characterized in that, The control component includes a liquid level monitoring piece, a control piece and a control valve. The two control valves are respectively arranged at the connection between the three-way pipeline and the corresponding partition. The control piece opens and closes the control valve according to the liquid level feedback of the liquid level monitoring piece, and controls the passage switching of the three-way valve.

7. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 6, Characterized in that, The liquid level monitoring piece includes a floating plate and a touch pressure frame. The floating plate floats in the partition, the touch pressure frame is arranged on the top of the floating plate, and the touch pressure frame penetrates upward through the partition and is slidably connected with it.

8. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 6, Characterized in that, The liquid level monitoring piece includes a liquid level sensor.

9. The preparation device for a neutralizing agent of laterite nickel ore acid leaching solution according to claim 7, Characterized in that, The control member includes 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. Pressing the control button at the top controls the opening of the control valve at the liquid discharge of the corresponding side of the bin, and controls the three-way valve to switch the passage to the adjacent bin. Pressing the control button at the bottom controls the closing of the control valve at the liquid discharge of the corresponding side of the bin.

10. The laterite nickel ore acid leaching solution neutralizing agent preparation device according to claim 8, characterized in that the control member includes a programmable logic controller, and the liquid level sensor, the three-way valve and the control valve are all electrically connected to the programmable logic controller.

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