Ore grinding pulp solution chemical on-line monitoring and regulation system

Abstract

The invention discloses a chemical on-line monitoring and regulating system for an ore grinding pulp solution. The chemical on-line monitoring and regulating system comprises a grinding machine system and a control system, wherein the grinding machine system is used for grinding ores to form the pulp solution; the ore pulp circulating system is connected with the input end and the output end of the mill system and combined to form a closed loop; the solution monitoring system is arranged at the output end of the mill system and is connected with the ore pulp circulating system; and the solution regulation and control system is arranged at the input end of the mill system and is connected with the ore pulp circulating system. Compared with the prior art, the technical scheme disclosed by the invention is simple in structure and low in manufacturing cost, can monitor and regulate the chemical properties of the ore pulp solution in real time, and is suitable for exploration and research of a suitable ore grinding system of the multi-metal sulfide ore, so that the flotation separation effect of the multi-metal sulfide ore is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical property monitoring of grinding solutions, and more specifically, to an online monitoring and control system for the chemistry of grinding slurry solutions. Background Art

[0002] In nature, key metals such as copper, gold, nickel, and molybdenum mainly exist in the form of sulfide ores, and the main method for treating polymetallic sulfide ores is flotation, the principle of which is to utilize and expand the hydrophobicity differences of different mineral surfaces to achieve separation of minerals. Before flotation, the ore must be crushed and ground to reduce the particle size of the target mineral to a suitable particle size for flotation; during flotation, the addition of a regulator adsorbs on the surface of non-target minerals to make them hydrophilic and remain at the bottom of the flotation pulp, and the addition of a collector selectively adsorbs the target mineral to make its surface hydrophobic and rise to the surface of the pulp, so that the target mineral and the non-target mineral are separated. It can be seen that the key to achieving efficient flotation separation of polymetallic sulfide ores lies in the selective adsorption of flotation reagents on the surfaces of different sulfide minerals. However, the adsorption of flotation reagents on the surface of sulfide minerals depends not only on the chemical or electrochemical properties of the mineral surface, but also on the chemical conditions of the pulp solution, and the chemical or electrochemical properties of the mineral surface and the chemical properties of the pulp solution are directly affected by the front-end operation of flotation - grinding. For example, sulfide ores usually have semiconductor properties. When they come into contact with iron grinding media during the grinding process, an electrochemical reaction will occur. The electrostatic potential of sulfide ores is lower than that of iron grinding media. Therefore, they act as cathodes during the electrochemical reaction, while the grinding media act as anodes, causing anodic corrosion and producing a large amount of iron ions. Under neutral and alkaline conditions, these iron ions non-selectively cover the surface of sulfide ores in the form of hydroxyl oxides or hydroxides, affecting the flotation behavior of minerals. In addition, various chemical or electrochemical reactions occurring during the grinding process also affect the pH, slurry potential (Eh) and dissolved oxygen content (DO) of the slurry solution, directly affecting the flotation effect and separation efficiency of sulfide ores.

[0003] At present, due to the lack of appropriate research methods, traditional grinding equipment can only regulate or detect the chemical properties of the grinding product pulp solution before and after the grinding operation, and cannot achieve real-time regulation and monitoring of the chemical properties of the pulp solution, which makes it difficult to determine the appropriate grinding system for polymetallic sulfide ores. As flotation regulation becomes more and more refined, the influence of the chemical properties of the solution such as pulp potential and pH on flotation will not be ignored. System equipment that can monitor and regulate the chemical properties of the grinding pulp solution online will greatly improve the flotation process level, so it is urgent to improve the existing grinding equipment in the laboratory or design a new grinding system.

[0004] Therefore, how to provide an online monitoring and control system for the chemistry of grinding slurry solution with a simple structure and low manufacturing cost, capable of real-time monitoring and control of the chemical properties of the slurry solution, suitable for the exploration and research of suitable grinding systems for polymetallic sulfide ores, thereby improving the flotation separation effect of polymetallic sulfide ores, has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an online monitoring and control system for the chemistry of grinding slurry solution, which has a simple structure and low manufacturing cost, can monitor and control the chemical properties of the slurry solution in real time, and is suitable for the exploration and research of suitable grinding systems for polymetallic sulfide ores, thereby improving the flotation separation effect of polymetallic sulfide ores.

[0006] The technical solution provided by the present invention is as follows:

[0007] The present invention provides an online monitoring and control system for the chemistry of a grinding slurry solution, comprising: a mill system for crushing and grinding ore to form a slurry solution; a slurry circulation system connected to an input end and an output end of the mill system to form a closed loop; a solution monitoring system arranged at the output end of the mill system and connected to the slurry circulation system; a solution control system arranged at the input end of the mill system and connected to the slurry circulation system;

[0008] The solution monitoring system comprises:

[0009] seat body;

[0010] A monitoring slot disposed on the seat;

[0011] A detection plug disposed on the top surface of the monitoring slot;

[0012] A monitoring meter connected to the detection plug;

[0013] A bracket disposed on the seat body;

[0014] A slurry stirring drive motor disposed on the support;

[0015] One end is connected to the output shaft of the slurry stirring drive motor, and the other end extends to the stirring rod in the monitoring tank;

[0016] A stirring blade disposed in the monitoring tank and connected to the stirring rod;

[0017] The stirring blade is arranged below the detection plug.

[0018] Further, in a preferred embodiment of the present invention, the mill system comprises:

[0019] Including rack;

[0020] A driving mechanism disposed on the frame;

[0021] A first transmission roller and a second transmission roller rotatably mounted on the frame and transmission-connected to the driving mechanism;

[0022] The first transmission roller and the second transmission roller are arranged side by side, and the rotation directions of the first transmission roller and the second transmission roller are opposite;

[0023] A grinding cylinder body disposed on the first transmission roller and the second transmission roller;

[0024] Pipe joints are arranged at both ends of the grinding cylinder, and the pipe joints on both sides of the grinding cylinder are respectively provided with a slurry inlet and a slurry outlet, and the slurry inlet and the slurry outlet are connected to the slurry circulation system.

[0025] Furthermore, in a preferred embodiment of the present invention, the monitoring tank is a cylindrical tank body, and a slurry solution chamber is provided inside the cylindrical tank body;

[0026] The bottom side wall of the cylindrical tank body is provided with a slurry solution inlet and a slurry solution outlet which are communicated with the slurry solution chamber;

[0027] The top surface of the cylindrical tank body is provided with an inspection socket, and the lower end of the detection plug passes through the inspection socket and extends into the slurry solution chamber.

[0028] Furthermore, in a preferred embodiment of the present invention, the monitoring meter includes: a pH meter, a potentiometer (Eh) and a dissolved oxygen meter (DO).

[0029] Furthermore, in a preferred embodiment of the present invention, the slurry circulation system comprises:

[0030] One end is connected to the slurry outlet, and the other end is connected to the first circulation pipeline of the monitoring tank;

[0031] A first delivery pump disposed on the first circulation pipeline;

[0032] One end is connected to the monitoring tank, and the other end is connected to the second circulation pipeline of the slurry inlet;

[0033] A second delivery pump is arranged on the second circulation pipeline.

[0034] Furthermore, in a preferred embodiment of the present invention, the first delivery pump and the second delivery pump are specifically peristaltic pumps.

[0035] Furthermore, in a preferred embodiment of the present invention, the solution control system comprises:

[0036] a reagent adding pipe connected to the second circulation pipe;

[0037] A medicine adding mechanism disposed at the input end of the medicine adding pipe;

[0038] an air filling pipe connected to the second circulation pipe;

[0039] An inflation mechanism is arranged at the input end of the inflation tube.

[0040] Furthermore, in a preferred embodiment of the present invention, the pipe joints are arranged at the center of the two sides of the grinding cylinder;

[0041] The pipeline joint is a cylindrical joint, and a slurry outlet pipeline and a slurry inlet pipeline are arranged in the cylindrical joint;

[0042] The slurry outlet pipeline and the slurry inlet pipeline are connected to the first circulation pipeline and the second circulation pipeline respectively;

[0043] The slurry discharge pipeline and the slurry inlet pipeline are connected to the internal chamber of the grinding cylinder, and the bottom ends of the slurry discharge pipeline and the slurry inlet pipeline are both located below the slurry water surface.

[0044] Furthermore, in a preferred embodiment of the present invention, the mill system further comprises:

[0045] The perforated sieve plates are arranged on both sides of the grinding cylinder.

[0046] Beneficial effects of the present invention:

[0047] The present invention provides an online monitoring and control system for the chemistry of a grinding slurry solution, comprising: a mill system for crushing ore to form a slurry solution; a slurry circulation system connected to the input and output ends of the mill system to form a closed loop; a solution monitoring system arranged at the output end of the mill system and connected to the slurry circulation system; and a solution control system arranged at the input end of the mill system and connected to the slurry circulation system. The grinding slurry solution chemical online monitoring and control system mainly consists of the mill system, the slurry circulation system, the solution monitoring system and the solution control system. The mill system and the slurry circulation system are combined to form a closed loop. The solution monitoring system and the solution control system are connected to the slurry circulation system and added to the closed loop. The mill system is used to crush ore to form a slurry solution. The polymetallic sulfide ore and the grinding medium are placed in the mill system. The polymetallic sulfide ore is struck and ground by the grinding medium. The slurry circulation system is used to drive the slurry solution to circulate in the closed loop. The input end and the output end of the mill system are respectively connected to the slurry circulation system. Through the action of the slurry circulation system, the slurry solution in the mill system is extracted for online monitoring and control, and then flows back to the mill system through the circulation pipeline. The solution monitoring system is arranged in the solution output loop of the slurry circulation system to monitor the chemical properties of the slurry solution in real time, and the solution control system is arranged in the solution return loop of the slurry circulation system to achieve real-time control of the solution properties by adding reagents and gases. It can be seen that compared with the prior art, the technical solution involved in the present invention has a simple structure and low manufacturing cost, can monitor and regulate the chemical properties of the slurry solution in real time, improve the flotation separation effect of polymetallic sulfide ores, and is suitable for the exploration and research of suitable grinding systems for polymetallic sulfide ores. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A schematic diagram of the structure of the grinding slurry solution chemical online monitoring and control system provided in an embodiment of the present invention;

[0050] Figure 2 A circulation flow diagram of the ore pulp solution in the grinding ore pulp solution chemical online monitoring and control system provided in an embodiment of the present invention;

[0051] Figure 3A schematic structural diagram of the grinding mill system provided in an embodiment of the present invention;

[0052] Figure 4 A schematic diagram of the structure of the solution monitoring system provided in an embodiment of the present invention;

[0053] Figure 5 A schematic diagram of the structure of the slurry circulation system provided in an embodiment of the present invention;

[0054] Figure 6 A schematic diagram of the structure of the solution control system provided in an embodiment of the present invention;

[0055] Figure 7 A cross-sectional view of the grinding cylinder provided in an embodiment of the present invention;

[0056] Figure 8 A graph showing real-time changes in chemical properties of the copper-nickel sulfide ore slurry solution provided in an embodiment of the present invention;

[0057] Fig. 9 A diagram of the staged chemical and electrochemical reaction processes of the copper-nickel sulfide ore slurry solution provided in an embodiment of the present invention.

[0058] Description of reference numerals:

[0059] Mill system 1; driving mechanism 1-1; frame 1-2; first transmission roller 1-3; second transmission roller 1-4; grinding cylinder 1-5; pipe joint 1-6; slurry circulation system 2; first circulation pipeline 2-1; first delivery pump 2-2; second circulation pipeline 2-3; second delivery pump 2-4; solution monitoring system 3; seat body 3-1; monitoring slot 3-2; detection plug 3-3; monitoring meter 3-4; bracket 3-5; driving motor 3-6; stirring rod 3-7; solution inlet 3-8; solution control system 4; reagent adding pipe 4-1; reagent adding mechanism 4-2; inflation pipe 4-3; inflation mechanism 4-4; perforated sieve plate 5; slurry outlet pipeline 6; slurry inlet pipeline 7. DETAILED DESCRIPTION

[0060] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0062] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0064] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0065] like Figures 1 to 7 As shown, an embodiment of the present invention provides an online monitoring and control system for the chemistry of a grinding slurry solution, which specifically includes: a mill system 1 for crushing ore to form a slurry solution; a slurry circulation system 2 connected to the input and output ends of the mill system 1 to form a closed loop; a solution monitoring system 3 arranged at the output end of the mill system 1 and connected to the slurry circulation system 2; and a solution control system 4 arranged at the input end of the mill system 1 and connected to the slurry circulation system 2.

[0066] Specifically, Figure 3As shown, in a specific embodiment of the present invention, the mill system 1 includes: a frame 1-2; a driving mechanism 1-1 arranged on the frame 1-2; a first drive roller 1-3 and a second drive roller 1-4 rotatably arranged on the frame 1-2 and transmission-connected to the driving mechanism 1-1; a grinding cylinder 1-5 arranged on the first drive roller 1-3 and the second drive roller 1-4; the first drive roller 1-3 and the second drive roller 1-4 are arranged side by side, and the rotation directions of the first drive roller 1-3 and the second drive roller 1-4 are opposite; pipe joints 1-6 are arranged at both ends of the grinding cylinder 1-5, and the pipe joints 1-6 on both sides of the grinding cylinder 1-5 are respectively provided with a slurry inlet and a slurry outlet, and the slurry inlet and the slurry outlet are connected to the slurry circulation system 2.

[0067] In the embodiment of the present invention, the grinding system 1 is used to crush the ore body and dissociate the mineral particles; wherein the driving mechanism 1-1 adopts a servo motor for providing rotational power; under the action of the driving mechanism 1-1, the first transmission roller 1-3 and the second transmission roller 1-4 rotate in opposite directions; the grinding cylinder 1-5 is used to place the polymetallic sulfide ore and the grinding medium, and the filling rate of the grinding medium is adjustable. The side wall of the grinding cylinder 1-5 abuts against the first transmission roller 1-3 and the second transmission roller 1-4. When the first When the driving roller 1-3 and the second driving roller 1-4 rotate on a fixed axis, they can drive the grinding cylinder 1-5 to rotate together, causing the grinding medium inside the grinding cylinder 1-5 to move, thereby generating a grinding effect to dissociate the mineral particles, and the rotation rate of the grinding cylinder 1-5 can also be adjusted according to the driving mechanism 1-1; combined with the slurry circulation system 2, the slurry solution in the grinding cylinder 1-5 can flow out from the slurry outlet, and the outflowing slurry solution is monitored and regulated and then flows back from the slurry inlet to form a circulation loop.

[0068] Specifically, Figure 4 As shown, in a specific embodiment of the present invention, the solution monitoring system 3 includes: a seat body 3-1; a monitoring slot 3-2 arranged on the seat body 3-1; a detection plug 3-3 arranged on the top surface of the monitoring slot 3-2; a monitoring meter 3-4 connected to the detection plug 3-3; a bracket 3-5 arranged on the seat body 3-1; a slurry stirring drive motor 3-6 arranged on the bracket 3-5; a stirring rod 3-7 having one end connected to the output shaft of the slurry stirring drive motor 3-6 and the other end extending into the monitoring slot 3-2; a stirring blade arranged in the monitoring slot 3-2 and connected to the stirring rod 3-7; the stirring blade is arranged below the detection plug 3-3.

[0069] Specifically, in a specific embodiment of the present invention, the monitoring meter 3-4 includes: a pH detector, a potentiometer and a dissolved oxygen meter.

[0070] In the embodiment of the present invention, the solution monitoring system 3 is used to monitor the chemical properties of the slurry solution in real time; wherein the monitoring tank 3-2, the detection plug 3-3 and the monitoring meter 3-4 are combined to form a monitoring device to realize real-time monitoring of the slurry solution, and the seat body 3-1, the bracket 3-5, the stirring rod 3-7, the slurry stirring drive motor 3-6 and the stirring blade are combined to form a stirring device to stir the slurry solution in the monitoring tank 3-2 to ensure the uniformity of the slurry during monitoring, wherein the seat body 3-1 and the bracket 3-5 are combined into a mounting frame for mounting the slurry stirring drive motor 3-6, the output of the slurry stirring drive motor 3-6 The output shaft is installed vertically downward, and the upper end of the stirring rod 3-7 is connected to the output shaft through a coupling, while the lower end of the stirring rod 3-7 extends downward and extends all the way to the monitoring tank 3-2. The stirring blades are evenly installed at the lower end, and the installation position of the stirring blades is located below the detection plug 3-3 to avoid the stirring blades from rotating and damaging the detection plug 3-3, resulting in inaccurate monitoring data; for the monitoring meter 3-4, it includes a pH meter, a potentiometer and a dissolved oxygen meter, etc. In a specific experiment, different types of monitoring meters 3-4 can be selected according to experimental needs to carry out real-time monitoring of the chemical properties of the slurry solution, so as to complete the experimental purpose of exploring the suitable grinding system for polymetallic sulfide ores.

[0071] Specifically, Figure 4 As shown, in a specific embodiment of the present invention, the monitoring tank 3-2 is a cylindrical tank body, and a slurry solution chamber is arranged inside the cylindrical tank body; a solution inlet 3-8 and a solution outlet connected to the slurry solution chamber are arranged on the side wall of the bottom end of the cylindrical tank body; an inspection socket is arranged on the top surface of the cylindrical tank body, and the lower end of the detection plug 3-3 passes through the inspection socket and extends into the slurry solution chamber.

[0072] In a specific embodiment of the present invention, the monitoring tank 3-2 is used as a liquid storage container to temporarily store the slurry solution to be monitored; the slurry can utilize inertial self-circulation to prevent mineral deposition and block the solution inlet and outlet.

[0073] Specifically, Figure 1 , Figure 5 As shown, in a specific embodiment of the present invention, the slurry circulation system 2 includes: a first circulation pipeline 2-1 having one end connected to the slurry outlet and the other end connected to the monitoring tank 3-2; a first delivery pump 2-2 arranged on the first circulation pipeline 2-1; a second circulation pipeline 2-3 having one end connected to the monitoring tank 3-2 and the other end connected to the slurry inlet; and a second delivery pump 2-4 arranged on the second circulation pipeline 2-3.

[0074] In a specific embodiment of the present invention, the slurry circulation system 2 is used to transport the slurry solution flowing out of the mill system 1 to the monitoring tank 3-2, and then transport the slurry solution in the monitoring tank 3-2 back to the mill system 1; wherein the first delivery pump 2-2 and the second delivery pump 2-4 both adopt peristaltic pumps, and the first circulation pipeline 2-1 and the second circulation pipeline 2-3 are specifically hoses, and the peristaltic pump rollers alternately squeeze and release the hoses to pump the slurry to achieve the conveying effect; the first circulation pipeline 2-1 is a solution output loop, and the slurry solution in the grinding cylinder 1-5, under the action of the peristaltic pump, flows out of the grinding cylinder 1-5 and is transported to the monitoring tank 3-2; and the second circulation pipeline 2-3 is a solution return loop, and after the monitoring of the monitoring tank 3-2 is completed, the slurry solution flows back to the grinding cylinder 1-5 through the second circulation pipeline 2-3 under the action of the peristaltic pump.

[0075] Specifically, Figure 6 As shown, in a specific embodiment of the present invention, the solution regulating system 4 includes: a drug adding pipe 4-1 connected to the second circulation pipe 2-3; a drug adding mechanism 4-2 arranged at the input end of the drug adding pipe 4-1; an inflation pipe 4-3 connected to the second circulation pipe 2-3; and an inflation mechanism 4-4 arranged at the input end of the inflation pipe 4-3.

[0076] In an embodiment of the present invention, the reagent adding pipe 4-1 is combined with the reagent adding mechanism 4-2, and is used to add different types of regulating reagents to the solution return loop according to experimental requirements. The inflation pipe 4-3 is combined with the inflation mechanism 4-4, and the inflation mechanism 4-4 adopts an inflation tank, which is used to fill different types of gases into the solution return loop to regulate the chemical properties of the slurry solution in the mill.

[0077] Specifically, Figure 7 As shown, in a specific embodiment of the present invention, the pipe joint 1-6 is arranged at the center of the circle on both sides of the grinding cylinder 1-5; the pipe joint 1-6 is a cylindrical joint, and a slurry outlet pipeline 6 and a slurry inlet pipeline 7 are arranged in the cylindrical joint; the slurry outlet pipeline 6 and the slurry inlet pipeline 7 are respectively connected to the first circulation pipeline 2-1 and the second circulation pipeline 2-3; the slurry outlet pipeline 6 and the slurry inlet pipeline 7 are connected to the internal chamber of the grinding cylinder 1-5, and the bottom ends of the slurry outlet pipeline 6 and the slurry inlet pipeline 7 are both located below the slurry water surface to ensure that the peristaltic pump can pump the slurry normally.

[0078] Specifically, Figure 7As shown, in a specific embodiment of the present invention, the grinding system 1 also includes: a perforated sieve plate 5 arranged on both sides of the grinding cylinder 1-5; the grinding medium and large particle ore body in the grinding cylinder are isolated from the slurry inlet pipeline 7 and the slurry outlet pipeline 6, which can effectively prevent large-sized particles and grinding medium from being pumped out into the hose and causing blockage.

[0079] The technical solution of the present invention is specifically described below in conjunction with specific embodiments:

[0080] In this embodiment, 500 g of copper-nickel sulfide ore is weighed, the weight of the grinding medium steel ball is 3 kg, and the amount of water added is 1.5 L. They are placed in the grinding cylinder 1-5 in the mill system 1, the mill speed is 300 r / min, and the ore sample is subjected to an online monitoring test of the grinding slurry solution chemistry.

[0081] In this embodiment, the copper-nickel sulfide ore forms a copper-nickel sulfide ore solution in the grinding cylinder 1-5. Under the action of the peristaltic pump, the copper-nickel sulfide ore solution enters the monitoring tank 3-2. The monitoring tank 3-2 is equipped with a pH detector, a potentiometer and a dissolved oxygen meter to perform online real-time monitoring of the chemical properties of the solution.

[0082] like Figure 8 As shown in the figure, the real-time chemical change information of the slurry solution shows that with the increase of grinding time, the chemical pH, potential and dissolved oxygen content of the copper-nickel sulfide ore grinding slurry solution show large fluctuations, indicating that pentlandite and chalcopyrite undergo complex chemical and electrochemical reactions at different stages of grinding. The following is a detailed description of the changes in the chemical properties of the solution according to time:

[0083] 15 minutes before grinding, the pH of the slurry solution dropped from 7.4 to 6.9, and the dissolved oxygen content gradually decreased, indicating that the main processes occurring at this stage were: oxidation of pentlandite and chalcopyrite, as shown in formula (1), and hydrolysis of copper, iron, and nickel ions dissolved in the slurry, as shown in formula (2).

[0084] (1)

[0085] (2)

[0086] In this stage, the potential of the slurry solution did not change significantly, but the dissolved oxygen content in the slurry gradually decreased, indicating that in the initial stage of grinding, the galvanic effect between the mineral particles and the grinding medium was not obvious. The main reaction in this stage was the self-oxidation reaction of pentlandite and chalcopyrite, which consumed the dissolved oxygen in the slurry.

[0087] Within 15-30 minutes of the grinding process, the pH of the copper-nickel sulfide ore solution slowly increases and the pulp potential slowly decreases, indicating that the generation rate of hydroxide ions in the solution is greater than the generation rate of hydrogen ions, and at this time the electrochemical effect between the mineral particles and the grinding medium is enhanced, and the reduction process of dissolved oxygen in the pulp is more obvious. The chemical equation is shown in formula (3).

[0088] (3)

[0089] After 30 minutes of grinding, the dissolved oxygen content in the slurry dropped to 0, the pH increased sharply, and the potential decreased sharply, indicating that the main reaction at this stage was the galvanic effect between the mineral and the grinding medium. , which oxidizes the surface of the iron medium. This process does not require the participation of oxygen. The chemical equation is shown in Equation (4), resulting in the formation of an alkaline environment and a strong reducing environment.

[0090] (4)

[0091] It can be seen that the grinding process of copper-nickel sulfide ore can be roughly divided into three stages. The chemical and electrochemical reaction processes occurring in these three stages in this embodiment are as follows: Fig. 9 As shown; 0-15 minutes, pentlandite and chalcopyrite are oxidized, and copper, iron and nickel ions are hydrolyzed; 15-30 minutes, the oxygen reduction process is enhanced; 30-50 minutes, the galvanic effect between the mineral and the grinding medium is enhanced; by analyzing these changing laws, we can systematically study the changes in the mineral surface chemistry and the chemical properties of the slurry solution during the grinding process of copper-nickel sulfide ores, systematically study the influence of grinding and grinding conditions on its flotation, draw the grinding slurry chemical area suitable for copper-nickel flotation separation, and guide the actual flotation separation conditions and systems of copper-nickel ores.

[0092] As described above, an embodiment of the present invention involves an online monitoring and control system for the chemistry of a grinding slurry solution, which is intended to solve the technical problems that traditional grinding equipment can only control or detect the chemistry of the grinding product slurry solution before and after the grinding operation, and cannot realize real-time control and monitoring of the chemical properties of the slurry solution, and that traditional laboratories lack equipment systems for exploring suitable grinding systems for polymetallic sulfide ores; the grinding slurry solution chemistry online monitoring and control system, its main body is composed of the mill system 1, the slurry circulation system 2, the solution monitoring system 3 and the solution control system 4, the mill system 1 and the slurry circulation system 2 are combined to form a closed loop, the solution monitoring system 3 and the solution control system 4 are connected to the slurry circulation system 2 and added to the closed loop; wherein, the mill system 1 It is used to crush and grind ore to form a slurry solution. The polymetallic sulfide ore and the grinding medium are placed in the mill system 1, and the polymetallic sulfide ore is struck and ground by the grinding medium; the slurry circulation system 2 is used to drive the slurry solution to circulate in a closed loop. The input end and the output end of the mill system 1 are respectively connected to the slurry circulation system 2. Through the action of the slurry circulation system 2, the slurry solution in the mill system 1 is extracted for online monitoring and regulation, and then flows back to the mill system 1 through the circulation pipeline; the solution monitoring system 3 is arranged in the solution output loop of the slurry circulation system 2 to monitor the chemical properties of the slurry solution in real time, and the solution regulation system 4 is arranged in the solution return loop of the slurry circulation system 2 to achieve real-time regulation of the solution properties by adding reagents and gases. Specifically, for the actual application of the grinding slurry solution chemical online monitoring and control system, during the grinding process, the grinding cylinder 1-5 moves, which drives the internal grinding medium to move and thus produce a grinding effect, and a slurry solution is formed in the cylinder. Subsequently, the peristaltic pump extracts part of the slurry solution in the mill and pumps it into a sealed monitoring tank 3-2. The monitoring tank 3-2 has a hole on the top and is equipped with a stirring device. pH, potential (Eh), dissolved oxygen (DO) meters, etc. are set at the top opening to monitor the changes in the chemical properties of the slurry solution online. Then, after the slurry solution passes through the monitoring tank 3-2, it is pumped back to the grinding cylinder 1-5 by the peristaltic pump to realize circulation. In the slurry return loop, the reagent addition pipe 4-1 and the charging mechanism 4-4 are connected to control the chemical properties of the grinding slurry solution in real time according to actual needs. It can be seen that compared with the prior art, the technical solution involved in the present invention has a simple structure and low manufacturing cost, can monitor and regulate the chemical properties of the slurry solution in real time, improve the flotation separation effect of polymetallic sulfide ores, and is suitable for the exploration and research of suitable grinding systems for polymetallic sulfide ores.

[0093] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grinding slurry solution chemical online monitoring and control system, characterized in that: include: A mill system for crushing ore to form a slurry solution; Connected with the input and output ends of the grinding mill system to form a closed-loop slurry circulation system; A solution monitoring system provided at the output end of the mill system and connected to the slurry circulation system; A solution control system provided at the input end of the mill system and connected to the slurry circulation system; The solution monitoring system comprises: seat body; A monitoring slot disposed on the seat; A detection plug disposed on the top surface of the monitoring slot; A monitoring meter connected to the detection plug; A bracket disposed on the seat body; A slurry stirring drive motor disposed on the support; One end is connected to the output shaft of the slurry stirring drive motor, and the other end extends to the stirring rod in the monitoring tank; A stirring blade disposed in the monitoring tank and connected to the stirring rod; The stirring blade is arranged below the detection plug.

2. The grinding slurry solution chemical online monitoring and control system according to claim 1 is characterized in that: The mill system comprises: frame; A driving mechanism disposed on the frame; A first transmission roller and a second transmission roller rotatably mounted on the frame and transmission-connected to the driving mechanism; The first transmission roller and the second transmission roller are arranged side by side, and the rotation directions of the first transmission roller and the second transmission roller are opposite; A grinding cylinder body disposed on the first transmission roller and the second transmission roller; Both ends of the grinding cylinder are provided with pipe joints, and the pipe joints on both sides of the grinding cylinder are respectively provided with a slurry inlet and a slurry outlet, and the slurry inlet and the slurry outlet are connected to the slurry circulation system.

3. The grinding slurry solution chemical online monitoring and control system according to claim 2 is characterized in that: The monitoring tank is a cylindrical tank body, and a slurry solution chamber is arranged inside the cylindrical tank body; The bottom side wall of the cylindrical tank body is provided with a slurry solution inlet and a slurry solution outlet which are communicated with the slurry solution chamber; The slurry solution inlet and the slurry solution outlet are arranged in parallel along the tangent direction of the monitoring tank wall and in the same direction; The top surface of the cylindrical tank body is provided with an inspection socket, and the lower end of the detection plug passes through the inspection socket and extends into the slurry solution chamber.

4. The grinding slurry solution chemical online monitoring and control system according to claim 2 is characterized in that: The monitoring meter includes: a pH meter, a potentiometer and a dissolved oxygen meter.

5. The grinding slurry solution chemical online monitoring and control system according to claim 2 is characterized in that: The slurry circulation system comprises: One end is connected to the slurry outlet, and the other end is connected to the first circulation pipeline of the monitoring tank; A first delivery pump disposed on the first circulation pipeline; One end is connected to the monitoring tank, and the other end is connected to the second circulation pipeline of the slurry inlet; A second delivery pump is arranged on the second circulation pipeline.

6. The grinding slurry solution chemical online monitoring and control system according to claim 5 is characterized in that: The first delivery pump and the second delivery pump are specifically peristaltic pumps.

7. The grinding slurry solution chemical online monitoring and control system according to claim 5 is characterized in that: The solution control system comprises: a reagent adding pipe connected to the second circulation pipe; A medicine adding mechanism disposed at the input end of the medicine adding pipe; an air filling pipe connected to the second circulation pipe; An inflation mechanism is arranged at the input end of the inflation tube.

8. The grinding slurry solution chemical online monitoring and control system according to claim 5 is characterized in that: The pipe joints are arranged at the center of the two sides of the grinding cylinder; The pipeline joint is a cylindrical joint, and a slurry outlet pipeline and a slurry inlet pipeline are arranged in the cylindrical joint; The slurry outlet pipeline and the slurry inlet pipeline are connected to the first circulation pipeline and the second circulation pipeline respectively; The slurry discharge pipeline and the slurry inlet pipeline are connected to the internal chamber of the grinding cylinder, and the bottom ends of the slurry discharge pipeline and the slurry inlet pipeline are both located below the slurry water surface.

9. The grinding slurry solution chemical online monitoring and control system according to claim 2 is characterized in that: The mill system also includes: The perforated sieve plates are arranged on both sides of the grinding cylinder.

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