System for efficiently recovering scheelite and fluorite from multi-metal mud ore

Abstract

The system comprises a crushing box, a magnetic separation tank I, a magnetic separation tank II, a mixing tank I, a flotation machine I, a mixing tank II, a flotation machine II and a centrifugal unit, and scheelite concentrate and fluorite concentrate are obtained. According to the method, magnetic separation and flotation are conducted in sequence, corrosion of ore pulp acidity to magnetic separation equipment is reduced, meanwhile, the ore pulp is acid through oxalic acid pickling, and oxalic acid serves as organic acid, has high chelation capacity and reducibility and can effectively react with oxides and pollutants on the surfaces of minerals, and the oxides and the pollutants are removed from the surfaces of the minerals. Meanwhile, oxalic acid can also react with sulfide minerals to change the surface properties of the sulfide minerals, so that the sulfide minerals are more easily captured and recycled in the flotation process. Under an acidic condition, oxalic acid can more effectively react with metal ions on the surface of fluorite to form a stable complex. The hydrophobicity of fluorite particles is enhanced, the fluorite particles are captured by a flotation agent and float to the surface of ore pulp, fluorite flotation is enhanced, and interference to scheelite flotation is reduced.

Description

Technical Field

[0001] The invention belongs to the field of ore dressing technology, and in particular relates to a system for efficiently recovering scheelite and fluorite from polymetallic mud ore. Background Art

[0002] Tungsten is one of the irreplaceable basic materials for the national economy and modern national defense. It is an important strategic material and is widely used in important fields such as aerospace, machinery manufacturing, and national defense industry. Therefore, the country attaches great importance to the development and utilization of tungsten resources.

[0003] At present, the difficulty in recovering scheelite lies in the fact that fluorite is associated with non-ferrous metals and rare metals such as tungsten and molybdenum, the mineral co-existence relationship is complex, the gangue minerals are diverse, fluorite is difficult to enrich efficiently, oleic acid anion collectors have poor selectivity, weak adaptability, and insufficient low-temperature resistance. It is difficult to overcome the effects of calcium-containing gangue minerals, temperature, water quality, impurity ions and other factors on fluorite flotation, resulting in low recovery efficiency of associated fluorite and serious waste of resources.

[0004] Most of the existing mineral processing technologies use neutral or alkaline conditions to select single scheelite. Due to the oxidation and surface denaturation problems in the raw ore, the flotation of sulfide ore is incomplete, which affects the subsequent selection grade of scheelite and fluorite. Secondly, the conventional mineral processing technology first performs flotation and then magnetic separation, which makes it easy to cause equipment corrosion during magnetic separation. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to solve the problem that the existing mineral processing technology cannot efficiently recover scheelite fluorite.

[0006] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0007] A system for efficiently recovering scheelite and fluorite from polymetallic mud ore, comprising:

[0008] Crushing box, with a discharge port, a crushing tooth roller and a roller grinding roller are arranged in the crushing box, a plurality of crushing tooth blocks are installed circumferentially of the crushing tooth roller, the crushing tooth blocks are used for raw ore crushing, and the roller grinding roller grinds the crushed raw ore to a particle size of -74μm accounting for 80%-95% of the total weight;

[0009] A magnetic separation tank is provided with a feed port 1, a discharge port 1 and a tailings port 1. The feed port 1 is connected to the discharge port of the crushing box. A weak magnetic group with a magnetic field strength of 4000 Gauss is installed in the magnetic separation tank. The weak magnetic group performs magnetic separation on the slurry to select magnetite and demagnetized ore.

[0010] Magnetic separation tank 2, which is provided with feeding port 2, unloading port 2 and tailing port 2. Feeding port 2 and tailing port 1 are connected. A strong magnetic group with a magnetic field strength of 1.0-1.3 Tesla is installed in the magnetic separation tank 2. The strong magnetic group performs magnetic separation on the demagnetized slurry to select wolframite and demagnetized ore.

[0011] A mixing tank, wherein an ore inlet and an ore outlet are provided on the mixing tank, the ore inlet and the tailings outlet are connected, and a stirrer, an oxalic acid addition pipe and a reagent addition pipe are installed in the mixing tank, and the stirrer is used to fully mix the components to obtain the pickling slurry;

[0012] Flotation machine 1, flotation machine 1 is used to float the acid-washed slurry to obtain sulfide ore and desulfurized ore. Flotation machine 1 is provided with a flotation inlet 1, a flotation outlet 1 and a flotation tail outlet 1, and the flotation inlet 1 is connected to the ore outlet 1;

[0013] A second mixing tank is provided with a second ore inlet and a second ore outlet, the second ore inlet is connected to a flotation tail outlet, a second stirrer, a second oxalic acid addition pipe and a second reagent addition pipe are installed in the second mixing tank, and the second stirrer is used to fully mix the components to obtain a pickling mixed ore pulp;

[0014] The second flotation machine is equipped with a flotation device for flotation of scheelite fluorite mixed ore and tailings. The second flotation machine is provided with a second flotation inlet, a second flotation outlet and a second flotation tail outlet. The second flotation inlet is connected to the second ore outlet.

[0015] The centrifuge unit is connected to the flotation outlet for re-selection of scheelite concentrate and fluorite concentrate.

[0016] In this solution, in order to solve the problem that the bolt holes are blocked when the tooth plates are replaced, which makes it impossible to quickly replace the tooth plates, preferably, four pressure-bearing shaft strips are arranged in the circumferential direction of the outer side of the crushing tooth roller, the pressure-bearing shaft strips are 3-8 mm thick and rectangular in cross section, and an adapter groove is arranged on the side of the crushing tooth block relative to the crushing tooth roller, and the adapter groove and the pressure-bearing shaft strip are installed with clearance fit;

[0017] The tooth-breaking blocks are divided into tooth-breaking blocks 1 and tooth-breaking blocks 2. Two tooth-breaking blocks 1 are symmetrically arranged up and down, and two tooth-breaking blocks 2 are symmetrically arranged up and down. The sides of the tooth-breaking blocks 1 and 2 fit each other.

[0018] The first crushing tooth block and the second crushing tooth block are both radially installed on the outer side of the crushing tooth roller.

[0019] Preferably, a sink groove is provided in the middle of one side of the crushing tooth block relative to the crushing tooth roller, a fixed block is installed in the sink groove, a blind hole is provided on one side of the fixed block relative to the crushing tooth block, a magnetic moving block is slidably matched in the blind hole, a fine hole is provided at the root of the blind hole, a connecting main rope is installed in the fine hole, and the connecting main rope is connected to the magnetic moving block;

[0020] A connector is integrally provided on the side of the fixed block facing away from the tooth-breaking block, and a fine hole penetrates the connector. At least two groups of symmetrically distributed vertical holes are arranged on the side of the connector and communicate with the fine hole. A connecting auxiliary rope connected to the connecting main rope is installed in the vertical hole. An external expansion hole is arranged at one end of the vertical hole away from the fine hole. A limit pin and a spring located on the side of the limit pin close to the fine hole are slidably matched in the external expansion hole. The connecting auxiliary rope penetrates the spring and is connected to the limit pin. The end of the limit pin away from the spring is partially exposed on the outside of the connector.

[0021] The pressure bearing shaft is provided with a socket corresponding to the position of the fixed block, and the side of the socket is provided with a track groove that slides with the limit pin. The track groove includes a deep groove at the end and a shallow groove at the socket groove and connected to the deep groove.

[0022] Preferably, a vertical dovetail slot is provided on one side of the tooth-breaking block, and vertical dovetail blocks are provided on two sides of the tooth-breaking block. The vertical dovetail slot and the vertical dovetail blocks are installed in a vertical socket-fitting manner.

[0023] In this solution, in order to solve the problem that the scraping bubbles are not cleaned in time, resulting in condensation on the scraper surface and dripping and adhering to the connection between the rotating shaft and the bearing, causing wear or affecting the selection operation, preferably, the flotation machine includes a slurry tank, a driver 1 and a driver 2 are installed on the top of the slurry tank, and a flow stabilizer is provided at the bottom of the slurry tank;

[0024] The flotation mechanism comprises a flotation tube, a driving shaft is installed inside the flotation tube, the top of the driving shaft is connected to the driver, a mixing sleeve is arranged at the bottom of the flotation tube, a flow divider is arranged at the bottom of the driving shaft, and the flow divider is located at the inner bottom of the mixing sleeve;

[0025] An air inlet pipe, which is arranged obliquely downward and has a bottom connected to the flotation pipe and a top higher than the liquid level of the slurry tank;

[0026] The ore pipe is connected with the flotation pipe, and the mixture of ore, reagent and air is dispersed outward by the distributing fluid;

[0027] A recovery tank, which is arranged on one side of the slurry tank;

[0028] The bubble scraping mechanism comprises a bubble scraping plate, which is connected to the driver via a rotating shaft and is used to clean the bubbles into a recovery tank.

[0029] Preferably, the bubble scraper plate includes a connecting plate and a movable plate, one end of the connecting plate is fixed on the rotating shaft, and the other end of the connecting plate is socket-slidably fitted on the movable plate, the movable plate is a hollow plate, a movable bin is provided on one side of the movable plate and a limiting plate is installed on the end of the movable bin, the connecting plate is slidably fitted in the movable bin and the maximum extension stroke is limited by the limiting plate.

[0030] Preferably, the scraping mechanism also includes a flushing pipe, a guide wheel and a pulling plate. The flushing pipe is used to flush the foam on the surface of the movable plate. Rotating disks are installed at both ends of the flushing pipe. The rotating disks are rotatably installed on the inner side of the slurry tank. The guide wheel is installed on the side of the slurry tank. An arc groove is provided on the inner side of the slurry tank. The center of the arc groove is located on the axis of the rotating shaft. The inner side of the arc groove slides with the pulling plate. The pulling plate is connected to the rotating disk via a connecting rope and the connecting rope is wound around the guide wheel. The pulling plate includes a sliding body and a rotating body. The sliding body slides in the arc groove. The rotating body is rotatably installed on the sliding body and a torsion spring is installed on the rotating node. An elastic limit pin 1 is installed inside the arc groove to limit the sliding body. An elastic limit pin 2 is installed on the inner side of the slurry tank to limit the deflection angle of the rotating disk.

[0031] In the present solution, in order to solve the problem of mixing dead corners that are easily generated when the components are mixed in the mixing tank, preferably, the agitator one and the agitator two both include a stirring head and a stirring rod rotatably mounted on the side of the stirring head, a gear plate is mounted on the top of the stirring head, a sphere is mounted on the body of the stirring head, an independently arranged fixing hoop is mounted on the outside of the sphere, the sphere is rotatably mounted in the fixing hoop, a gear body is independently meshed on the outside of the gear plate, and the gear body is powered by an independently arranged servo motor.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention reduces the corrosion of the acidity of the pulp to the magnetic separation equipment by adopting magnetic separation before flotation. At the same time, the pulp is acidic by oxalic acid pickling. Oxalic acid, as an organic acid, has strong chelating ability and reducing property, and can effectively react with oxides and pollutants on the surface of the mineral to remove them from the surface of the mineral. At the same time, oxalic acid can also react with sulfide minerals to change the properties of their surfaces, making them easier to be captured and recovered during the flotation process. After pickling, the recovery rates of molybdenum and bismuth reach 62.55% and 15.94%, respectively, which are 16.12 and 5.13 percentage points higher than the un-pickling process. At the same time, the mixed scheelite-fluorite ore is floated under acidic conditions. Under acidic conditions, oxalic acid can more effectively react with metal ions on the surface of fluorite to form a stable complex. It helps to enhance the hydrophobicity of fluorite particles, making them easier to be captured by the flotation agent and float to the surface of the pulp. The flotation effect of fluorite is enhanced, while the interference with the flotation of scheelite is minimized.

[0034] 2. The present invention also makes structural improvements to the crushing mechanism used in the crushing process. The tooth roller of the tooth roller crusher needs to be replaced after long-term operation due to wear. However, in the past, the tooth roller of the tooth roller crusher was equipped with an axial dovetail socket to prevent radial shedding and then bolted. This requires complicated operations to complete the replacement of the crushing tooth plate. At the same time, when crushing minerals, it is easy to cause blockage of the dense installation hole, which is a burden for subsequent replacement operations. The present application combines a group of toothed ring parts that cannot be passively opened radially through a direct radial installation and circumferential adaptation method. During subsequent replacement, it only needs to cooperate with the external magnetic block to overcome the spring force and remove the limit pin from the socket to easily complete the replacement operation.

[0035] 3. The present invention adopts a new scraper cleaning method, using a flushing pipe to flush the front and back of the scraper at different points to prevent the surface from sticking to the flotation minerals, polluting the rotating shaft and the bearing assembly position, and in serious cases affecting the normal operation of the scraper and the surface agglomeration. By timely flushing the front and back and making appropriate adjustments to the flushing direction at different times, it is possible to achieve a cleaning after each scraping, thereby solving the problem of surface sticking to the flotation minerals and causing agglomeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0037] Figure 2 for Figure 1 Schematic diagram of the crushing tooth roller structure in the middle crushing box;

[0038] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0039] Figure 4 for Figure 3 A diagram showing the connection relationship between the middle connector and the socket;

[0040] Figure 5 It is a connection relationship diagram between the broken tooth block 1 and the broken tooth block 2;

[0041] Figure 6 It is a schematic diagram of the structure inside the mixing tank;

[0042] Figure 7 This is the internal structure diagram of the flotation machine;

[0043] Figure 8 for Figure 7 The structural diagram of the middle scraping bubble mechanism;

[0044] Fig. 9 for Figure 7 Position relationship diagram of the middle traction plate and the arc groove;

[0045] Fig.10is a position relationship diagram of the rotating disk and the elastic limiting pin 2;

[0046] Fig.11 This is a positional relationship diagram of the movable plate and the connecting plate.

[0047] In the figure: 100, slurry tank; 101, driver 1; 102, driver 2; 103, flotation tube; 104, flow stabilizing plate; 105, driving shaft; 106, mixing sleeve; 107, flow distributor; 108, air intake pipe; 109, ore pipe; 111, recovery tank; 112, bubble scraper; 113, pulling plate; 1121, connecting plate; 1122, movable plate; 1123, limiting plate; 1124, flushing pipe; 1125, guide wheel; 1126, rotating disk; 1127, arc groove; 11271, elastic limiting pin 1; 11272, elastic limiting pin 2; 1128, rotating shaft; 1129, connecting rope; 113, pulling plate; 1131, sliding body; 1132, rotating body;

[0048] 200, crushing box; 201, discharge port; 202, crushing tooth roller; 2021, pressure bearing shaft; 2022, socket slot; 2023, shallow slot; 2024, deep slot; 203, crushing tooth block; 2031, adapter slot; 2032, crushing tooth block one; 20321, vertical dovetail slot; 2033, crushing tooth block two; 20331, vertical dovetail block; 2034, fixed block; 2035, blind hole; 2036, magnetic moving block; 2037, connecting main rope; 2038, connector; 2039, fine hole; 20310, connecting auxiliary rope; 20311, limit pin; 20312, spring;

[0049] 300, magnetic separation tank one; 301, ore feeding port one; 302, ore unloading port one; 303, tailings port one; 304, weak magnetic group;

[0050] 400, magnetic separation tank 2; 401, ore feeding port 2; 402, ore unloading port 2; 403, tailings port 2; 404, strong magnetic group;

[0051] 500, a mixing tank; 501, an ore inlet; 502, an ore outlet; 504, a stirrer; 5041, a stirring head; 5042, a stirring rod; 5043, a gear plate; 5044, a ball; 5045, a fixing hoop; 5047, a gear body; 5048, a servo motor; 505, an oxalic acid addition tube; 506, a reagent addition tube;

[0052] 600, mixing tank 2; 601, ore inlet 2; 602, ore outlet 2; 604, stirrer 2; 605, oxalic acid adding pipe 2; 606, reagent adding pipe 2;

[0053] 700, centrifugal unit;

[0054] 800, flotation machine 1; 801, flotation inlet 1; 802, flotation outlet 1; 803, flotation tail outlet 1;

[0055] 900, flotation machine 2; 901, flotation inlet 2; 902, flotation outlet 2; 903, flotation tail outlet 2. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0057] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] Embodiment 1, as Figure 1 As shown, a system for efficiently recovering scheelite and fluorite from polymetallic mud ore comprises:

[0059] A crushing box 200 is provided with a discharge port 201, a crushing tooth roller 202 and a roller grinding roller 204 are provided in the crushing box 200, a plurality of crushing tooth blocks 203 are circumferentially installed on the crushing tooth roller 202, the crushing tooth blocks 203 are used for raw ore crushing, and the roller grinding roller 204 rolls the crushed raw ore to a particle size of -74μm accounting for 80%-95% of the total weight;

[0060] A magnetic separation tank 300 is provided with a feed port 301, a discharge port 302 and a tailing port 303. The feed port 301 is connected to a discharge port 201 of a crushing box 200. A weak magnetic group 304 with a magnetic field strength of 4000 Gauss is installed in the magnetic separation tank 300. The weak magnetic group 304 performs magnetic separation on the slurry to select magnetite and demagnetized ore.

[0061] The second magnetic separation tank 400 is provided with a second feed port 401, a second unloading port 402 and a second tailing port 403. The second feed port 401 is connected to the first tailing port 303. A strong magnetic group 404 with a magnetic field strength of 1.0-1.3 Tesla is installed in the second magnetic separation tank 400. The strong magnetic group 404 performs magnetic separation on the demagnetized slurry to select wolframite and demagnetized ore.

[0062] A mixing tank 500 is provided with an ore inlet 501 and an ore outlet 502, the ore inlet 501 is connected to a tailings outlet 2 403, a stirrer 504, an oxalic acid addition pipe 505 and a reagent addition pipe 506 are installed in the mixing tank 500, and the stirrer 504 is used to fully mix the components to obtain the pickled ore pulp;

[0063] A flotation machine 800 is used to float the acid-washed slurry to obtain sulfide ore and desulfurized ore. The flotation machine 800 is provided with a flotation inlet 801, a flotation outlet 802 and a flotation tail outlet 803. The flotation inlet 801 is connected to the ore outlet 502.

[0064] The second mixing tank 600 is provided with a second ore inlet 601 and a second ore outlet 602. The second ore inlet 601 is connected to a flotation tail outlet 803. The second mixing tank 600 is provided with a stirrer 604, an oxalic acid addition pipe 607 and a reagent addition pipe 606. The stirrer 604 is used to fully mix the components to obtain a pickling mixed ore pulp.

[0065] The second flotation machine 900 is installed with a flotation machine for flotating scheelite fluorite mixed ore and tailings. The second flotation machine 900 is provided with a flotation inlet 901, a flotation outlet 902 and a flotation tail outlet 903. The flotation inlet 901 is connected to the second ore outlet 602.

[0066] The centrifuge unit 700 is connected to the second flotation outlet 902, and the centrifuge unit 700 is used for re-selecting scheelite concentrate and fluorite concentrate.

[0067] The method of first magnetic separation and then flotation is adopted to reduce the corrosion of the acidity of the pulp to the magnetic separation equipment. At the same time, the pulp is acidic after being washed with oxalic acid. As an organic acid, oxalic acid has strong chelating ability and reducing property, and can effectively react with oxides and pollutants on the surface of the mineral to remove them from the surface of the mineral. At the same time, oxalic acid can also react with sulfide minerals to change the properties of their surfaces, making them easier to be captured and recovered during the flotation process. After acid washing, the recovery rates of molybdenum and bismuth reached 62.55% and 15.94%, respectively, which were 16.12 and 5.13 percentage points higher than those of the un-acid washing process. At the same time, the mixed ore of scheelite-fluorite is floated under acidic conditions. Under acidic conditions, oxalic acid can more effectively react with metal ions on the surface of fluorite to form a stable complex. It helps to enhance the hydrophobicity of fluorite particles, making them easier to be captured by the flotation agent and float to the surface of the pulp. The flotation effect of fluorite is enhanced, while the interference with the flotation of scheelite is minimized.

[0068] Embodiment 2, in the above-mentioned system, if Figures 2 to 5As shown, four pressure-bearing shaft strips 2021 are arranged circumferentially on the outer side of the crushing tooth roller 202. The pressure-bearing shaft strips 2021 are 3-8 mm thick and have a rectangular cross section. An adapting groove 2031 is arranged on one side of the crushing tooth block 203 relative to the crushing tooth roller 202. The adapting groove 2031 and the pressure-bearing shaft strips 2021 are installed in a clearance fit.

[0069] The tooth-breaking block 203 is divided into a tooth-breaking block 1 2032 and a tooth-breaking block 2033. Two tooth-breaking blocks 1 2032 are symmetrically arranged up and down, and two tooth-breaking blocks 2033 are symmetrically arranged up and down. The sides of the tooth-breaking block 1 2032 and the tooth-breaking block 2 2033 are fitted to each other.

[0070] The crushing tooth block 1 2032 and the crushing tooth block 2033 are both radially installed on the outside of the crushing tooth roller 202 to form a crushing tooth ring member with good integrity and durability.

[0071] The crushing tooth block 203 is provided with a sink groove in the middle of one side opposite to the crushing tooth roller 202, and a fixed block 2034 is installed in the sink groove. The fixed block 2034 is provided with a blind hole 2035 on one side opposite to the crushing tooth block 203, and a magnetic moving block 2036 is slidably matched in the blind hole 2035. A fine hole 2039 is provided at the root of the blind hole 2035, and a connecting main rope 2037 is installed in the fine hole 2039, and the connecting main rope 2037 is connected to the magnetic moving block 2036.

[0072] A connector 2038 is integrally formed on the side of the fixed block 2034 facing away from the tooth-breaking block 203, and a fine hole 2039 penetrates the connector 2038. At least two groups of symmetrically distributed vertical holes are arranged on the side of the connector 2038 and communicate with the fine hole 2039. A connecting auxiliary rope 20310 connected to the connecting main rope 2037 is installed in the vertical hole. An external expansion hole is arranged at one end of the vertical hole away from the fine hole 2039. A limit pin 20311 and a spring 20312 located on the side of the limit pin 20311 close to the fine hole 2039 are slidably matched in the external expansion hole. The connecting auxiliary rope 20310 penetrates the spring 20312 and is connected to the limit pin 20311. One end of the limit pin 20311 away from the spring 20312 is partially exposed on the outside of the connector 2038.

[0073] The pressure-bearing shaft 2021 is provided with a socket slot 2022 corresponding to the position of the fixing block 2034 , and the side of the socket slot 2022 is provided with a track groove that slides with the limit pin 20311 , and the track groove includes a deep groove 2024 located at the end and a shallow groove 2023 located at the slot mouth of the socket slot 2022 and connected to the deep groove 2024 .

[0074] like Figure 5As shown, in order to realize radial installation of the gear ring components, the side of the broken tooth block 2032 is provided with a vertical dovetail slot 20321, and the side of the broken tooth block 2033 is provided with a vertical dovetail block 20331. The vertical dovetail slot 20321 and the vertical dovetail block 20331 are installed in a vertical socket-type adapter manner.

[0075] During assembly, the broken tooth block 2033 is installed first, and then the broken tooth block 1 2032 is radially installed to form a gear ring. During installation, an electromagnet is added to the outside of the broken tooth block 203 and energized, the magnetic moving block 2036 is moved outward along the blind hole 2035, the main connecting rope 2037 and the connecting auxiliary rope 20310 are pulled to retract the limit pin 20311, compress the spring 20312, enter the shallow groove 2023 and enter the deep groove 2024, and the power supply of the electromagnet is disconnected. The magnetic moving block 2036 is reset under the action of the spring 20312, and the limit pin 20311 and the deep groove 2024 are adapted. When replacement is required, after the external electromagnet is energized, the limit pin 20311 and the deep groove 2024 are released from the adapted state and removed from the socket 2022.

[0076] Embodiment 3, in the above-mentioned system, if Figures 7 to 11 As shown, the flotation machine 1 800 and the flotation machine 2 900 both include a slurry tank 100;

[0077] A driver 101 and a driver 2 102 are installed on the top of the slurry tank 100, and a flow stabilizing plate 104 is provided at the bottom of the slurry tank 100;

[0078] The flotation mechanism includes a flotation tube 103, a driving shaft 105 is installed inside the flotation tube 103, the top of the driving shaft 105 is connected to the driver 101, a mixing sleeve 106 is arranged at the bottom of the flotation tube 103, a flow divider 107 is arranged at the bottom of the driving shaft 105, and the flow divider 107 is located at the inner bottom of the mixing sleeve 106;

[0079] An air inlet pipe 108, which is arranged obliquely downward and has a bottom connected to the flotation pipe 103 and a top higher than the liquid level of the slurry tank 100;

[0080] The ore pipe 109 is connected to the flotation pipe 103, and the mixture of ore, reagent and air is dispersed outward by the flow divider 107;

[0081] A recovery tank 111, which is disposed on one side of the slurry tank 100;

[0082] The bubble scraping mechanism includes a bubble scraping plate 112 , which is connected to the driver 2 102 via a rotating shaft 1128 and is used to clean the bubbles into the recovery tank 111 .

[0083] During implementation, the driver 101 mixes the ore pulp with the reagent and air, and then sprays them outward under the action of the driving shaft 105 and the flow divider 107, and no vortex occurs under the action of the flow stabilizer 104. The flotation foam floats up and is cleaned into the recovery tank 111 under the action of the foam scraper 112 driven by the driver 102 for recovery.

[0084] The scraper plate 112 includes a connecting plate 1121 and a movable plate 1122, one end of the connecting plate 1121 is fixed on the rotating shaft 1128, and the other end of the connecting plate 1121 is slidably fitted on the movable plate 1122 in a socket-shaped manner. The movable plate 1122 is a hollow plate that can float on the surface of the liquid and will not cause excessive cleaning of the slurry, thereby improving the recovery rate of scheelite and fluorite. A movable bin is provided on one side of the movable plate 1122 and a limiting plate 1123 is installed at the end of the movable bin. The connecting plate 1121 is slidably fitted in the movable bin and the maximum extension stroke is limited by the limiting plate 1123. A fluid blocking fluid can be provided on the limiting plate 1123, which blocks the flushing water flow from entering the slurry tank 100 and drains it into the recovery tank 111.

[0085] The foam scraping mechanism also includes a flushing pipe 1124, a guide wheel 1125 and a pulling plate 113. The flushing pipe 1124 is used to flush the foam on the surface of the movable plate 1122. Rotating disks 1126 are installed at both ends of the flushing pipe 1124. The rotating disk 1126 is rotatably installed on the inner side of the slurry tank 100. The guide wheel 1125 is installed on the side of the slurry tank 100. An arc groove 1127 is provided on the inner side of the slurry tank 100. The center of the arc groove 1127 is located on the axis of the rotating shaft 1128. The inner side of the arc groove 1127 slides with the pulling plate 113. The pulling plate 113 is pulled by the rotating shaft 1128. The connecting rope 1129 is connected to the rotating disk 1126 and the connecting rope 1129 is wound around the guide wheel 1125. The pulling plate 113 includes a sliding body 1131 and a rotating body 1132. The sliding body 1131 is slidably fitted in the arc groove 1127. The rotating body 1132 is rotatably installed on the sliding body 1131 and a torsion spring is installed on the rotating node. An elastic limit pin 11271 is installed inside the arc groove 1127 to limit the sliding body 1131. An elastic limit pin 2 11272 is installed on the inner side of the slurry tank 100 to limit the deflection angle of the rotating disk 1126. The elastic limit pin 1 1271 and the elastic limit pin 2 11272 both include a fixed sleeve, a movable pin is inserted in the fixed sleeve, a baffle and a limit plate are provided on the movable pin, the baffle and the limit plate are respectively located on both sides of the fixed sleeve, and a spring is mounted on the outer side of the movable pin between the limit plate and the fixed sleeve. The limit surface of the movable pin is an arc surface, and the limit release can be completed by only overcoming the force of the limit surface.

[0086] After the movable plate 1122 transports the bubbles into the recovery tank 111, the flushing pipe 1124 flushes the bubble pushing surface of the movable plate 1122. As the movable plate 1122 rotates, it contacts the flushing pipe 1124 and drives the flushing pipe 1124 to rotate to the final position relative to the slurry tank 100. The rotating disk 1126 is limited by the elastic limiting pin 11272. At this time, the flushing pipe 1124 flushes the non-bubble pushing surface of the movable plate 1122, and the flushing water and foam enter the recovery tank 111.

[0087] As the movable plate 1122 continues to move, the movable plate 1122 moves downward relative to the connecting plate 1121, the exposed length of the connecting plate 1121 decreases, and the movable plate 1122 acts on the rotating body 1132. The rotating body 1132 moves to the initial position together with the movable plate 1122. When moving to the initial position, the flushing tube 1124 returns to the initial position. At this time, the sliding body 1131 is restricted by the elastic limit pin 11271; after moving to the initial position, as the movable plate 1122 continues to rotate, the rotating body 1132 deflects relative to the sliding body 1131 and compresses the torsion spring. When the movable plate 1122 passes through the rotating body 1132, the rotating body 1132 is reset under the action of the torsion spring.

[0088] Embodiment 4, in the above-mentioned system, if Figure 6 As shown, in order to solve the problem of mixing dead angles when the components are mixed in the mixing tank, the agitator 1 504 and the agitator 2 604 both include a mixing head 5041 and a mixing rod 5042 rotatably mounted on the side of the mixing head 5041, a gear plate 5043 is mounted on the top of the mixing head 5041, a sphere 5044 is mounted on the body of the mixing head 5041, an independently arranged fixing hoop 5045 is mounted on the outside of the sphere 5044, the sphere 5044 is rotatably mounted in the fixing hoop 5045, a gear body 5047 is independently meshed on the outside of the gear plate 5043, and the gear body 5047 is powered by an independently arranged servo motor 5048. This design can provide a larger mixing area through the mixing head 5041, and secondly, the mixing rod 5042 is used to increase the mixing strength of the dead angles in the mixing tank.

[0089] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A system for efficiently recovering scheelite and fluorite from polymetallic mud ore, characterized in that: include: A crushing box (200), wherein the crushing box (200) is provided with a discharge port (201), a crushing tooth roller (202) and a roller grinding roller (204) are provided in the crushing box (200), a plurality of crushing tooth blocks (203) are circumferentially mounted on the crushing tooth roller (202), the crushing tooth blocks (203) are used for crushing the raw ore, and the roller grinding roller (204) roller grinds the crushed raw ore to a particle size of -74 μm accounting for 80% to 95% of the total weight; A magnetic separation tank (300) is provided with a feed port (301), a discharge port (302) and a tailing port (303). The feed port (301) is connected to a discharge port (201) of a crushing box (200). A weak magnetic group (304) with a magnetic field strength of 4000 Gauss is installed in the magnetic separation tank (300). The weak magnetic group (304) performs magnetic separation on the ore pulp to select magnetite and demagnetized ore. A second magnetic separation tank (400), wherein the second magnetic separation tank (400) is provided with a second ore feeding port (401), a second ore unloading port (402) and a second tailing port (403), wherein the second ore feeding port (401) and the first tailing port (303) are connected, and a strong magnetic group (404) with a magnetic field strength of 1.0-1.3 Tesla is installed in the second magnetic separation tank (400), and the strong magnetic group (404) performs magnetic separation operation on the demagnetized ore pulp to select wolframite and demagnetized ore; A mixing tank (500) is provided with an ore inlet (501) and an ore outlet (502), the ore inlet (501) is connected to a tailings outlet (403), a stirrer (504), an oxalic acid addition pipe (505) and a reagent addition pipe (506) are installed in the mixing tank (500), and the stirrer (504) is used to fully mix the components to obtain the acid-washed ore slurry; A flotation machine (800), wherein the flotation machine (800) floats the acid-washed slurry to obtain sulfide ore and desulfurized ore. The flotation machine (800) is provided with a flotation inlet (801), a flotation outlet (802) and a flotation tail outlet (803). The flotation inlet (801) is connected to an ore outlet (502). A second mixing tank (600), wherein the second mixing tank (600) is provided with a second ore inlet (601) and a second ore outlet (602), wherein the second ore inlet (601) is connected to a first flotation tail outlet (803), and the second mixing tank (600) is provided with a second stirrer (604), a second oxalic acid addition pipe (605) and a second reagent addition pipe (606), wherein the second stirrer (604) is used to fully mix the components to obtain a pickling mixed ore pulp; A second flotation machine (900) is installed in the second flotation machine (900) to float out the scheelite fluorite mixed ore and tailings. The second flotation machine (900) is provided with a second flotation inlet (901), a second flotation outlet (902) and a second flotation tail outlet (903). The second flotation inlet (901) is connected to the second ore outlet (602); The centrifuge unit (700) is connected to the second flotation outlet (902), and the centrifuge unit (700) is used for re-selecting scheelite concentrate and fluorite concentrate.

2. The system for efficiently recovering scheelite and fluorite from polymetallic mud ore according to claim 1 is characterized in that: Four pressure-bearing shaft strips (2021) are arranged on the outer circumference of the crushing tooth roller (202); the pressure-bearing shaft strips (2021) are 3-8 mm thick and have a rectangular cross section; an adapting groove (2031) is arranged on the side of the crushing tooth block (203) opposite to the crushing tooth roller (202); the adapting groove (2031) and the pressure-bearing shaft strips (2021) are installed in a clearance fit; The broken tooth block (203) is divided into a broken tooth block 1 (2032) and a broken tooth block 2 (2033). Two broken tooth blocks 1 (2032) are symmetrically arranged up and down, and two broken tooth blocks 2 (2033) are symmetrically arranged up and down. The sides of the broken tooth block 1 (2032) and the broken tooth block 2 (2033) are in contact with each other. The crushing tooth block 1 (2032) and the crushing tooth block 2 (2033) are both radially installed on the outside of the crushing tooth roller (202).

3. The system for efficiently recovering scheelite and fluorite from polymetallic mud ore according to claim 2 is characterized in that: A sink is provided in the middle of one side of the crushing tooth block (203) opposite to the crushing tooth roller (202), a fixed block (2034) is installed in the sink, a blind hole (2035) is provided on one side of the fixed block (2034) opposite to the crushing tooth block (203), a magnetic moving block (2036) is slidably matched in the blind hole (2035), a fine hole (2039) is provided at the root of the blind hole (2035), a connecting main rope (2037) is installed in the fine hole (2039), and the connecting main rope (2037) and the magnetic moving block (2036) are connected; The fixing block (2034) is integrally provided with a connector (2038) on one side facing away from the tooth-breaking block (203), and a fine hole (2039) penetrates the connector (2038). The side of the connector (2038) is provided with at least two groups of symmetrically distributed vertical holes that are in communication with the fine hole (2039), and a connecting auxiliary rope (20310) connected to the connecting main rope (2037) is installed inside the vertical hole, and the vertical hole is away from the fine hole (2039). One end of the connector is provided with an external expansion hole, in which a limit pin (20311) and a spring (20312) located on the side of the limit pin (20311) close to the fine hole (2039) are slidably matched, a connecting secondary rope (20310) passes through the spring (20312) and is connected to the limit pin (20311), and an end of the limit pin (20311) away from the spring (20312) is partially exposed on the outside of the connector (2038); The pressure-bearing shaft (2021) is provided with a socket (2022) corresponding to the position of the fixing block (2034); the side of the socket (2022) is provided with a track groove that slidably cooperates with the limit pin (20311); the track groove includes a deep groove (2024) located at the end and a shallow groove (2023) located at the notch of the socket (2022) and connected to the deep groove (2024).

4. The system for efficiently recovering scheelite and fluorite from polymetallic mud ore according to claim 2 is characterized in that: The side of the first tooth-breaking block (2032) is provided with a vertical dovetail slot (20321), and the side of the second tooth-breaking block (2033) is provided with a vertical dovetail block (20331). The vertical dovetail slot (20321) and the vertical dovetail block (20331) are installed in a vertical socket-type adaptor.

5. A system for efficiently recovering scheelite and fluorite from polymetallic mud ore according to claim 1 or 2, characterized in that: The flotation machine 1 (800) and the flotation machine 2 (900) both include a slurry tank (100); A driver 1 (101) and a driver 2 (102) are installed on the top of the slurry tank (100), and a flow stabilizing plate (104) is arranged at the bottom of the slurry tank (100); The flotation mechanism comprises a flotation tube (103), a driving shaft (105) is installed inside the flotation tube (103), the top of the driving shaft (105) is connected to the driver (101), a mixing sleeve (106) is arranged at the bottom of the flotation tube (103), a flow divider (107) is arranged at the bottom of the driving shaft (105), and the flow divider (107) is located at the inner bottom of the mixing sleeve (106); An air inlet pipe (108), the air inlet pipe (108) is arranged obliquely downward, the bottom of the air inlet pipe is connected to the flotation pipe (103), and the top of the air inlet pipe (108) is higher than the liquid level of the slurry tank (100); A mineral material pipe (109), the mineral material pipe (109) is connected to the flotation pipe (103), and a mixture of mineral material, reagent and air is dispersed outward by a distributing fluid (107); A recovery tank (111), wherein the recovery tank (111) is arranged on one side of the slurry tank (100); The bubble scraping mechanism comprises a bubble scraping plate (112), the bubble scraping plate (112) is connected to the second driver (102) via a rotating shaft (1128), and is used for cleaning bubbles into a recovery tank (111).

6. The system for efficiently recovering scheelite and fluorite from polymetallic mud ore according to claim 5 is characterized in that: The bubble scraping plate (112) comprises a connecting plate (1121) and a movable plate (1122); one end of the connecting plate (1121) is fixed on the rotating shaft (1128); the other end of the connecting plate (1121) is slidably fitted on the movable plate (1122) in a socket-shaped manner; the movable plate (1122) is a hollow plate; a movable bin is provided on one side of the movable plate (1122) and a limiting plate (1123) is installed at the end of the movable bin; the connecting plate (1121) is slidably fitted in the movable bin and the maximum extension stroke is limited by the limiting plate (1123).

7. The system for efficiently recovering scheelite and fluorite from polymetallic mud ore according to claim 6 is characterized in that: The foam scraping mechanism further comprises a flushing pipe (1124), a guide wheel (1125) and a pulling plate (113). The flushing pipe (1124) is used to flush the foam on the surface of the movable plate (1122). Rotating disks (1126) are installed at both ends of the flushing pipe (1124). The rotating disk (1126) is rotatably installed on the inner side of the slurry tank (100). The guide wheel (1125) is installed on the side of the slurry tank (100). An arc groove (1127) is provided on the inner side of the slurry tank (100). The center of the arc groove (1127) is located on the axis of the rotating shaft (1128). The interior of the arc groove (1127) is slidably matched with the pulling plate (113). The pulling plate (113) The pulling plate (113) is connected to the rotating disk (1126) via a connecting rope (1129) which is wound around a guide wheel (1125). The pulling plate (113) comprises a sliding body (1131) and a rotating body (1132). The sliding body (1131) is slidably fitted in an arc groove (1127). The rotating body (1132) is rotatably mounted on the sliding body (1131) and a torsion spring is mounted on a rotating node. An elastic limiting pin 1 (11271) is mounted inside the arc groove (1127) for limiting the sliding body (1131). An elastic limiting pin 2 (11272) is mounted on the inner side of the slurry tank (100) for limiting the deflection angle of the rotating disk (1126).

8. The system for efficiently recovering scheelite and fluorite from polymetallic mud ore according to claim 1 is characterized in that: The stirrer 1 (504) and stirrer 2 (604) both comprise a stirring head (5041) and a stirring rod (5042) rotatably mounted on the side of the stirring head (5041); a gear plate (5043) is mounted on the top of the stirring head (5041); a sphere (5044) is mounted on the body of the stirring head (5041); an independently arranged fixing hoop (5045) is mounted on the outer side of the sphere (5044); the sphere (5044) is rotatably mounted in the fixing hoop (5045); a gear body (5047) is independently meshed on the outer side of the gear plate (5043); and the gear body (5047) is powered by an independently arranged servo motor (5048).

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