A slag flotation reagent dosing device

Abstract

This utility model provides a slag flotation reagent dosing device, comprising: a material conveying mechanism for conveying slag; a detection mechanism disposed on the conveying path of the material conveying mechanism for detecting the composition of the slag; a flotation cell located at the discharge end of the material conveying mechanism; a reagent dosing mechanism for adding flotation reagents to the flotation cell, the reagent dosing mechanism including a regulating valve for adjusting the dosing rate; and a controller, the signal input port of the controller being electrically connected to the detection mechanism, and the signal output port of the controller being electrically connected to the regulating valve. The real-time closed-loop control system composed of the detection mechanism, the controller, and the reagent dosing mechanism not only improves the accuracy of the flotation reagent addition and the metal recovery rate, but also avoids reagent waste, solves the pain point of lagging control in traditional flotation processes, and promotes the flotation process from experience-driven to data-driven intelligence. In addition, it also saves labor costs.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, and in particular to a slag flotation reagent dosing device. Background Technology

[0002] my country produces over ten million tons of slag annually from copper pyrometallurgical processes. This slag contains native copper, small amounts of copper oxide and copper sulfide, and some even contains precious metals such as lead, cobalt, nickel, gold, and silver. Flotation is currently the primary method for copper slag beneficiation. It involves adding flotation reagents to a flotation cell, where the copper ore slurry and reagents react fully to produce a large amount of foam. The foam containing minerals is then transported to the next stage for concentration, sedimentation, and drying to obtain the final product, ore powder. Flotation is not only highly efficient and energy-saving, but it also removes iron tetroxide impurities from copper slag, maximizing the recovery of copper and precious metals. Currently, the elemental composition concentration of the copper slag to be floated is manually tested approximately every twelve hours to adjust the addition rate and amount of flotation reagents. This lack of real-time monitoring not only affects the grade and recovery rate of the recovered metals but also potentially wastes reagents and increases labor costs. Utility Model Content

[0003] This utility model provides a slag flotation reagent dosing device to solve the technical problems of reduced grade and recovery rate of recovered metals, waste of reagents and increased labor costs caused by the inability to adjust the addition rate and amount of flotation reagents in real time according to the composition of the slag to be flotated.

[0004] This utility model provides a slag flotation reagent dosing device comprising: a material conveying mechanism for conveying slag; a detection mechanism disposed on the conveying path of the material conveying mechanism for detecting the composition of the slag; a flotation cell located at the discharge end of the material conveying mechanism; a reagent dosing mechanism for adding flotation reagents to the flotation cell, the reagent dosing mechanism including a regulating valve for adjusting the dosing rate; and a controller, the signal input port of the controller being electrically connected to the detection mechanism, and the signal output port of the controller being electrically connected to the regulating valve.

[0005] In one embodiment of the present invention, the regulating valve includes a regulating valve body and a driving mechanism. The regulating valve body includes a valve core and a valve seat that are slidably connected. The valve core is connected to the driving mechanism, and the driving mechanism is electrically connected to the signal output port of the controller. The driving mechanism can drive the valve core to produce a lifting motion relative to the valve seat.

[0006] In one embodiment of the present invention, the driving mechanism includes a motor and a transmission unit. The motor and the signal output port of the controller are electrically connected. The transmission unit includes a lead screw. One end of the lead screw is fixedly connected to the output shaft of the motor, and the other end is slidably connected to the valve core through a meshing thread to form a lead screw and nut pair.

[0007] In one embodiment of this utility model, the detection mechanism is a neutron detector.

[0008] In one embodiment of the present invention, the dosing device further includes a weight sensor, which is installed on the material conveying mechanism and is used to detect the weight of the material carried by the material conveying mechanism. The weight sensor is electrically connected to the signal input port of the controller.

[0009] In one embodiment of the present invention, the material conveying mechanism is a belt conveyor mechanism, the weight sensor is a belt scale weight sensor installed on the belt conveyor mechanism, and the belt scale weight sensor is electrically connected to the signal input port of the controller.

[0010] In one embodiment of the present invention, the dosing device includes at least two sets of dosing mechanisms, and the regulating valve of each set of dosing mechanisms is electrically connected to the signal output port of the controller.

[0011] In an optional embodiment of the present invention, the dosing device includes three sets of dosing mechanisms, which can respectively add a collector, an inhibitor, and a frother to the flotation tank.

[0012] In one embodiment of the present invention, the dosing mechanism is suspended above the flotation cell, and the dosing mechanism further includes a vertically arranged dosing pipe, and the regulating valve is connected to the dosing pipe.

[0013] In one embodiment of the present invention, the dosing device further includes an injector, the inlet end of which is fixedly connected to the outlet of the dosing pipe, and the outlet end of which faces the flotation cell.

[0014] The beneficial effects of this utility model are as follows: The detection mechanism, controller, and dosing mechanism of the slag flotation reagent dosing device provided by this utility model constitute a closed-loop feedback control system. The controller dynamically calculates the reagent demand in real time through the control algorithm model, converts the calculated reagent addition amount into an electrical signal, and transmits it to the regulating valve through a signal cable. The opening degree of the regulating valve changes the cross-sectional size of the reagent liquid channel, thereby regulating and controlling the reagent addition rate. This not only improves the accuracy of flotation reagent addition and increases the metal recovery rate, but also avoids reagent waste, solves the pain point of lagging control in traditional flotation processes, and promotes the flotation process from experience-driven to data-driven intelligence. In addition, it also saves labor costs. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the overall structure of a slag flotation reagent addition device provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the regulating valve provided in one embodiment of the present invention;

[0019] Figure 3 This is a longitudinal sectional view of the regulating valve provided in one embodiment of the present invention;

[0020] Figure 4 These are the three sets of dosing mechanisms provided in one embodiment of this utility model;

[0021] The attached figures are labeled as follows:

[0022] 100. Belt conveyor mechanism; 200. Neutron detector; 300. Flotation cell; 310. Material discharge pipe; 400. Control valve; 410. Valve core; 420. Valve seat; 430. Motor; 440. Lead screw; 450. Coupling; 460. Dosing pipe; 470. Mounting bracket; 500. Controller; 510. Signal cable; 600. Belt scale weight sensor; 700. Mounting bracket; 800. Injector; 900. Connecting bracket. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] This utility model provides a slag flotation reagent dosing device to solve the problem of existing technologies that rely on manual, intermittent testing of the elemental composition concentration of copper slag to be flotated to adjust the addition rate and amount of flotation reagents. This lack of real-time monitoring not only affects the grade and recovery rate of the recovered metal but also may lead to reagent waste and increased labor costs. The technical solution of this utility model is described in detail below with reference to specific embodiments:

[0026] Please see Figures 1-4 The slag flotation reagent dosing device provided by this utility model includes: a material conveying mechanism for conveying slag; in a specific embodiment, a conveying mechanism such as an elevator can be used to convey slag with a suitable particle size received from the grinding mill to the reagent dosing device; a detection mechanism, set on the conveying path of the material conveying mechanism, for detecting the composition of the copper slag; in a specific embodiment, the composition can be the type and concentration of various metals in the slag; and a flotation cell 300, located at the discharge end of the material conveying mechanism. In a specific embodiment, in order to conveniently discharge the flotation foam or tailings containing metals from the flotation into the flotation cell 300, a device such as... can be installed on the flotation cell 300. Figure 1 The material discharge pipe 310; the dosing mechanism, used to add flotation reagents to the flotation tank 300, the dosing mechanism including a regulating valve 400 for adjusting the dosing rate; and a controller 500, the signal input port of the controller 500 being electrically connected to the detection mechanism, and the signal output port of the controller 500 being electrically connected to the regulating valve 400, such as using a communication cable (CAN cable). In a specific embodiment, the controller 500 can be a microcontroller or a PLC. The controller 500 should include a storage unit and a data processing unit. A program edited according to certain algorithm rules is pre-stored in the controller 500 to establish a positive correlation between the concentration of the detected relevant elements and the amount of reagent added. Based on the concentration range of the detected relevant elements, the amount of reagent added is divided into several levels, and the amount of reagent added is finely adjusted in real time according to the slight changes in the concentration of the detected elements.

[0027] The detection mechanism, controller 500, and dosing mechanism constitute a closed-loop feedback control system. The controller 500 dynamically calculates the reagent demand in real time through the control algorithm model, converts the calculated reagent addition amount into an electrical signal, and transmits it to the regulating valve 400 through the signal cable 510. The opening degree of the regulating valve 400 changes the cross-sectional size of the reagent liquid channel, thereby regulating and controlling the reagent addition rate. The reagent addition rate is changed from once every twelve hours by manual testing to once every ten minutes or even five minutes. This not only improves the accuracy of flotation reagent addition and increases the metal recovery rate, but also avoids reagent waste, solves the pain point of lagging control in traditional flotation processes, and promotes the flotation process from experience-driven to data-intelligent driven. In addition, it also saves labor costs.

[0028] In one embodiment of this utility model, the detection mechanism is a neutron detector 200. In a specific embodiment, to facilitate the installation of the neutron detector 200, a mounting frame 700 can be set up to cover the material conveying mechanism. The neutron generator, detector array, polyethylene moderator block, boron-containing polyethylene shielding block and other components of the neutron detector 200 are installed on the mounting frame 700. When the slag to be floated passes through the neutron detector 200, it is bombarded by neutrons and excited by characteristic gamma rays. After photoelectric conversion, the gamma rays are recorded in the form of energy spectrum data. The type and content of elements contained in the slag to be floated can be accurately identified by the algorithm for spectrum analysis, thereby providing an accurate feedforward input signal to the controller 500.

[0029] Please see Figure 2 , Figure 3 In one embodiment of the present invention, the regulating valve 400 includes a regulating valve 400 body and a driving mechanism. The regulating valve 400 body includes a valve core 410 and a valve seat 420 that are slidably connected. The valve core 410 is connected to the driving mechanism, and the driving mechanism is electrically connected to the signal output port of the controller 500. The driving mechanism can drive the valve core 410 to produce a lifting motion relative to the valve seat 420. In a specific embodiment, the driving mechanism can adopt a hydraulically driven or pneumatically driven telescopic rod structure. The end of the telescopic rod is connected to the valve core 410, and the solenoid valve in the hydraulic or pneumatic circuit is electrically connected to the signal output port of the controller 500.

[0030] By making the drive mechanism and the regulating valve 400 body into an integrated structure, the integration level of the dosing device is improved and the installation steps of the dosing device are simplified.

[0031] Please see Figure 2 , Figure 3In one embodiment of this utility model, the driving mechanism includes a motor 430 and a transmission unit. In a specific embodiment, a servo motor 430 can be used to improve the motion accuracy of the driving mechanism as much as possible, thereby improving the opening accuracy of the regulating valve 400. The motor 430 and the signal output port of the controller 500 are electrically connected. The transmission unit includes a lead screw 440. One end of the lead screw 440 is fixedly connected to the output shaft of the motor 430 through a coupling 450, and the other end is slidably connected to the valve core 410 through a meshing thread to form a lead screw and nut pair. In a specific embodiment, the top of the valve core 410 can be... The valve core 410 is machined into a rectangular shape, and a groove adapted to the rectangular shape is machined on the inner wall of the valve seat 420, thereby playing a guiding and limiting role in restricting the rotation of the valve core 410. An internal thread that meshes with the thread of the lead screw 440 is machined inside the top of the valve core 410, so that the lead screw 440 and the valve core 410 form a lead screw and nut pair. In addition, in order to facilitate the installation of the lead screw 440 and the motor 430, and to provide a sealing protection to prevent dust and other debris from entering the output shaft of the lead screw 440 and the motor 430, a long cylindrical mounting bracket 470 that can accommodate the output shaft of the lead screw 440 and the motor 430 can be fixedly connected to the valve seat 420.

[0032] Compared with hydraulic or pneumatic drives, the drive mechanism using motor 430 does not need to consider the leakage of liquid or gas. More importantly, it has a faster millisecond-level response speed, which further ensures the real-time performance of the dosing device. The screw and nut pair consisting of the transmission unit and the valve core 410 can reliably convert the rotational motion of the output shaft of motor 430 into the lifting motion of valve core 410.

[0033] In one embodiment of the present invention, the dosing device further includes a weight sensor, which is installed on the material conveying mechanism and is used to detect the weight of the material carried by the material conveying mechanism. The weight sensor is electrically connected to the signal input port of the controller 500.

[0034] When the controller 500 accurately determines that the slag flow on the material conveying mechanism is interrupted based on the detection signal from the weight sensor, it can promptly shut down the neutron detector 200 to reduce safety risks such as radiation.

[0035] In one embodiment of this utility model, please refer to Figure 1 The material conveying mechanism is a belt conveyor 100, and the weight sensor is a belt scale weight sensor 600 installed on the belt conveyor 100. The belt scale weight sensor 600 is electrically connected to the signal input port of the controller 500. Compared with material conveying mechanisms such as elevators, the belt conveyor 100 has better transport continuity. In addition, it can make the material spread more evenly on the transport surface, which is more conducive to the detection mechanism to detect the composition of the material.

[0036] Please see Figure 1 , Figure 4 In one embodiment of this utility model, the dosing device includes at least two sets of dosing mechanisms. The regulating valve 400 of each set of dosing mechanisms is electrically connected to the signal output port of the controller 500. The controller 500 can control the addition rate of different types of reagents by controlling the opening of the regulating valve 400 of each set of dosing mechanisms, so as to achieve the most suitable reagent ratio and dosage for the slag in the flotation cell 300 at present. This allows the copper minerals and precious metals in the slag to fully react with the reagents, be encapsulated by foam, float to the flotation cell 300, and then be discharged to the concentration, sedimentation and drying process.

[0037] In one embodiment of this utility model, the dosing device may employ three sets of dosing mechanisms. Each set of dosing mechanisms adds a collector, a depressant, and a frother to the flotation cell 300. The collector can alter the hydrophobicity of the mineral surface, enhance the adhesion between copper ore particles and air bubbles, making them easier to float. By selectively adsorbing onto the copper ore surface, it forms a hydrophobic layer, promoting the adhesion between ore particles and air bubbles. The depressant is used to suppress the floating of non-target minerals such as iron(III) oxide, reducing impurity interference. During the flotation process, the depressant weakens the floatability of non-copper minerals, ensuring the purity of the copper ore. The frother is used to reduce the surface tension of the liquid phase, generating a stable foam layer, providing an attachment carrier for the copper ore particles. The frother and collector work synergistically to enhance the flotation separation effect.

[0038] In one embodiment of this utility model, please refer to Figure 1 The dosing mechanism is suspended above the flotation tank 300. The dosing mechanism also includes a vertically arranged dosing pipe 460, and the regulating valve 400 is connected to the dosing pipe 460.

[0039] Compared to placing the dosing mechanism on the side or bottom of the flotation cell 300, the dosing mechanism suspended above the flotation cell 300 can utilize gravity to allow the reagent to fall naturally into the flotation cell 300, which can reduce the use of hydraulic pumps or reduce the energy consumption of hydraulic pumps, thereby reducing the operating cost of the dosing device.

[0040] In one embodiment of this utility model, the dosing device further includes an injector 800. The inlet end of the injector 800 is fixedly connected to the outlet of the dosing pipe 460, and the outlet end faces the flotation cell 300. The injector can powerfully spray the reagent into the flotation cell 300, ensuring the reliability of the dosing device. In a specific embodiment, when multiple dosing mechanisms are included, in order to simplify the component structure and installation steps, a method such as... Figure 4 The multi-pass injector shown is a multi-injector 800 vertically arranged and mounted on the connecting frame 900.

[0041] In summary, the detection mechanism, controller 500, and dosing mechanism constitute a closed-loop feedback control system. The controller 500 dynamically calculates the reagent demand in real time using its algorithm model, converts the calculated reagent addition amount into an electrical signal, and transmits it to the regulating valve 400 via signal cable 510. The opening of the regulating valve 400 changes the cross-sectional area of ​​the reagent liquid channel, thereby regulating the reagent addition rate. This not only improves the accuracy of flotation reagent addition and increases metal recovery rate but also avoids reagent waste, solving the problem of lag control in traditional flotation processes and promoting the transition from experience-driven to data-driven intelligent processes. Furthermore, it saves labor costs. The dosing device includes at least two sets of dosing mechanisms, and the regulating valve 400 of each dosing mechanism is electrically connected to the signal output port of the controller 500. The controller 500 can control the regulating valve 400 of each dosing mechanism separately. The opening size of 00 controls the addition rate of different types of reagents to achieve the most suitable reagent ratio and dosage for the slag in the flotation cell 300. Compared with hydraulic or pneumatic drive, using the drive mechanism of motor 430 to drive the lifting and lowering of valve core 410 eliminates the problem of liquid or gas leakage. More importantly, it has a faster millisecond-level response speed, further ensuring the real-time performance of the dosing device. The screw and nut pair composed of the transmission unit and valve core 410 can reliably convert the rotational motion of the output shaft of motor 430 into the lifting and lowering motion of valve core 410. The detection mechanism of neutron detector 200 can accurately identify the types and contents of elements contained in the slag to be flotated, thereby providing accurate feedforward input signals to controller 500. According to industry experience, it is estimated that after using the above dosing device, the reagent dosage can be reduced by 20%, the copper recovery rate can be increased by 3%, and the copper content in tailings can be reduced by 30%.

[0042] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A mineral slag flotation dosing device, characterized by, include: Material conveying mechanism, used for conveying slag; A detection mechanism is installed on the conveying path of the material conveying mechanism to detect the composition of the slag; A flotation cell, located at the discharge end of the material conveying mechanism; A dosing mechanism for adding flotation reagents to the flotation cell, the dosing mechanism including a regulating valve for adjusting the dosing rate; The controller has its signal input port electrically connected to the detection mechanism and its signal output port electrically connected to the regulating valve.

2. The slag floating and dosing device according to claim 1, characterized in that The detection mechanism is a neutron detector.

3. The slag floating and dosing device according to claim 1, characterized in that, The regulating valve includes a regulating valve body and a drive mechanism. The regulating valve body includes a valve core and a valve seat that are slidably connected. The valve core is connected to the drive mechanism, and the drive mechanism is electrically connected to the signal output port of the controller. The drive mechanism can drive the valve core to produce a lifting and lowering motion relative to the valve seat.

4. The slag floating and dosing device according to claim 3, characterized in that The drive mechanism includes a motor and a transmission unit. The motor and the signal output port of the controller are electrically connected. The transmission unit includes a lead screw. One end of the lead screw is fixedly connected to the output shaft of the motor, and the other end is slidably connected to the valve core through a meshing thread to form a lead screw and nut pair.

5. The slag floatation dosing device according to claim 1, characterized in that, It also includes a weight sensor, which is installed on the material conveying mechanism to detect the weight of the material being conveyed by the material conveying mechanism. The weight sensor is electrically connected to the signal input port of the controller.

6. The slag floating and dosing device according to claim 5, characterized in that The material conveying mechanism is a belt conveyor, and the weight sensor is a belt scale weight sensor installed on the belt conveyor. The belt scale weight sensor is electrically connected to the signal input port of the controller.

7. The slag flotation reagent dosing device according to claim 1, characterized in that, It includes at least two sets of the dosing mechanism, and the regulating valve of each set of the dosing mechanism is electrically connected to the signal output port of the controller.

8. The slag floatation dosing device according to claim 7, characterized in that It includes three sets of dosing mechanisms, which can respectively add collectors, inhibitors, and frothers to the flotation tank.

9. The slag floatation dosing device according to claim 1, characterized in that, The dosing mechanism is suspended above the flotation cell, and the dosing mechanism also includes a vertically arranged dosing pipe, with the regulating valve connected to the dosing pipe.

10. The slag floatation dosing device according to claim 9, characterized in that It also includes an injector, the inlet end of which is fixedly connected to the outlet of the dosing pipe, and the outlet end of which faces the flotation cell.

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