Whole-process mineral processing technology for argillized tungsten polymetallic ore

Abstract

The invention belongs to a polymetallic ore beneficiation technology, and particularly relates to a full-process beneficiation process for argillization tungsten polymetallic ore. According to the method, magnetite is separated through magnetic separation, wolframite is separated through strong magnetic separation (then, the wolframite concentrate is obtained through table gravity separation and centrifugal gravity separation), sulfide ore is activated through oxalic acid pickling, then the sulfide ore is separated through flotation, the scheelite and fluorite are separated through oxalic acid pickling and co-flotation, and finally the scheelite concentrate and the fluorite concentrate are separated through centrifugal gravity separation, so that the recovery grade of each ore is high, and the recovery rate is also high.

Description

Technical Field

[0001] The present invention belongs to the field of polymetallic ore dressing technology, in particular to a full-process beneficiation process for muddy tungsten polymetallic ore. Background Art

[0002] my country has rich reserves of scheelite resources and a good mineralization environment, which is a superior mineral resource. However, due to the fact that there are more poor ores and fewer rich ores, and some deposits have complex compositions, and scheelite is brittle and easy to be over-crushed, and most of the embedded particles are fine, the gangue minerals are usually calcium-containing minerals with similar floatability to scheelite, these minerals have a close symbiotic relationship with tungsten minerals and are difficult to separate. With the large-scale mining of scheelite, the problem of "poor, fine and mixed" scheelite resources has become increasingly prominent. At the same time, scheelite deposits are associated with a variety of useful minerals, mainly tin, molybdenum, bismuth, copper, lead, zinc, etc.; followed by sulfur, lithium, niobium, tantalum, fluorite, etc. Comprehensive recovery of these beneficial components is not only a reasonable development and utilization of mineral resources, but also an important way to improve the economic benefits of mining.

[0003] According to CN113369005A, flotation, magnetic separation, and flotation processes are used. If flotation is performed first and then magnetic separation is performed, the drug residues in the selected minerals will corrode the magnetic separation equipment. At the same time, due to the oxidation of the original ore, the recovery rates of molybdenum and bismuth are unstable and the recovery rate of bismuth is poor during the full flotation of sulfide ore. At the same time, the surface denaturation of scheelite and the residual reagents in the feed ore lead to the problem of insufficient purity of the selected fluorite and scheelite concentrates.

[0004] Therefore, it is of great significance to develop a mineral processing technology that can comprehensively recover tungsten resources and associated elements. Summary of the invention

[0005] 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:

[0006] A full-process beneficiation process for muddy tungsten polymetallic ore, comprising:

[0007] Step 1, Grinding

[0008] Grind the raw ore to obtain a clay ore with a particle size of -74μm and a weight percentage of 80%-95%, and mix the clay ore into a 30% slurry;

[0009] Step 2: Magnetic separation of magnetite

[0010] The ore pulp is subjected to weak magnetic roughing with a magnetic field strength of 4000 Gauss to obtain magnetic roughing concentrate and magnetic roughing tailings;

[0011] The magnetic rougher concentrate is subjected to weak magnetic concentration to obtain magnetic rougher concentrate and weak magnetic concentration tailings;

[0012] Step 3: Magnetic separation of wolframite

[0013] The magnetic rougher tailings and weak magnetic concentrate tailings are mixed, and then subjected to strong magnetic separation at 1.0-1.3 Tesla to obtain weak magnetic separation minerals and demagnetized tailings;

[0014] The weak magnetic separation ore is re-selected on a shaking table to obtain wolframite concentrate I and re-selection tailings. The re-selection tailings are re-selected by one coarse and two fine centrifugal re-selection to obtain wolframite concentrate II and wolframite centrifugal tailings. Wolframite concentrate I and wolframite concentrate II are used as target wolframite concentrates.

[0015] Step 4, pickling

[0016] 1kg / t oxalic acid was added to the demagnetized tailings and stirred for 10 minutes to obtain acid-washed sulfide ore;

[0017] Step 5, sulfide ore flotation

[0018] Add 800g / t of water glass, 100g / t of ethyl thiocyanate, 50g / t of xanthate, and 100g / t of BK-205 to the pickled sulfide ore and stir for 2 minutes;

[0019] After all components are fully mixed, they are sent to the flotation machine together for roughing for 4 minutes to obtain roughing concentrate and roughing tailings;

[0020] Add 200g / t of water glass to the rough concentrate, stir for 1min, and concentrate for 3min to obtain concentrated concentrate and concentrated tailings;

[0021] Add 10g / t of ethyl thiocyanate to the selected tailings, stir for 1min, and perform fine sweeping for 3min to obtain fine sweep concentrate and fine sweep tailings;

[0022] Add 10g / t BK-205 to the rougher tailings and stir for 1min, and scavenging for 3min to obtain scavenging concentrate and scavenging tailings. The scavenging concentrate is added to the rougher concentrate.

[0023] The scavenging tailings and the fine scavenging tailings are mixed as the raw ore for the mixed concentration of scheelite and fluorite;

[0024] Step 6: Scheelite-fluorite simultaneous flotation

[0025] Add 4kg / t of oxalic acid and stir for 30min, 1kg / t of water glass and stir for 2min, and 1kg / t of capture agent LLR and stir for 2min to the mixed ore of scavenging tailings and concentrated scavenging tailings, and then put them into the flotation machine to obtain scheelite-fluorite flotation concentrate and co-floating tailings;

[0026] The scheelite-fluorite flotation concentrate is subjected to two blank concentrations to obtain the scheelite-fluorite concentrate;

[0027] Step 7: Scheelite and fluorite separation

[0028] The scheelite-fluorite concentrate is subjected to four centrifugal gravity separations to separate out scheelite concentrate and fluorite concentrate.

[0029] In the present application scheme, in step 2, the slurry is fed from the feed trough to the magnetic separation drum and enters the magnetic separation trough. A horizontally biased permanent magnetic group is arranged inside the magnetic separation drum. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum. The feed position is located above one side of the magnetic separation drum at the maximum field strength position.

[0030] The magnetic material in the slurry is adsorbed on the magnetic separation drum, and the slurry is then fed to the magnetic separation drum for a second time through the feeding arc plate;

[0031] The slurry rotates around the respective axes in the magnetic separation drum and the internal permanent magnetic group. The permanent magnetic group consists of a plurality of alternating N poles and S poles. The magnetic material rolls on the surface of the magnetic separation drum and is transported to the concentrate discharge port.

[0032] The magnetic roughing tailings are washed by water in the magnetic separation tank and discharged through the tailings port. The magnetic roughing concentrate continues to pass through the bottom area of ​​the magnetic separation tank and is washed by water, and the weak magnetic concentrate tailings are discharged through the medium ore port.

[0033] The magnetic material still adsorbed on the magnetic separation drum is discharged from the concentrate discharge port, wherein the concentrate discharge port is located below one side of the magnetic separation drum at the minimum field strength position.

[0034] In the present application, a magnetic isolation plate is independently provided between the magnetic separation drum and the permanent magnet group, and the magnetic isolation plate is located above the inside of the magnetic separation drum at the minimum field strength position;

[0035] An ore unloading water pipe is arranged on the outer side of the magnetic separation drum. The ore unloading water pipe is located above one side of the magnetic separation drum at the minimum field strength position and the water flow direction is arranged obliquely downward.

[0036] In the present application, both the intermediate ore opening and the tailing opening are provided with opening and closing arc plates, and the opening and closing arc plates are used to adjust the size of the intermediate ore opening and the tailing opening.

[0037] In the present application, in step 5, after the components are fully mixed and sent to the flotation machine, the reagent captures the sulfide ore and the mixed bubbles float together, and after floating, it is sent from the slurry tank to the recovery tank under the action of the rotating scraper plate;

[0038] The scraper plate includes a connecting plate and a movable plate. The connecting plate is slidably installed in the movable plate. The movable plate is a hollow plate. The bottom of the movable plate floats on the surface of the slurry. The connecting plate is fixed on the rotating shaft. The rotating shaft is equipped with an independent reduction motor. An arc groove is arranged in the slurry tank. An adjusting block is installed in the arc groove. The adjusting block includes a sliding body slidingly fitted in the arc groove and a rotating body rotatably installed on the sliding body. A torsion spring is installed between the rotating body and the sliding body. A connecting rope is installed on the sliding body. One end of the connecting rope is passed around the guide wheel and connected to a rotating disk. The rotating disk and the guide wheel are installed inside the recovery tank. A flushing pipe is installed on the rotating disk. A plurality of linearly distributed flushing water outlets are arranged on the flushing pipe. The flushing water outlets are used to flush the front and back sides of the movable plate.

[0039] In the present application, a limit plate is provided on the top of the movable plate, which is used to limit the maximum extension length of the connecting plate relative to the movable plate. A baffle is provided on the side of the limit plate facing away from the rotating axis, and the baffle is gradually arranged away from the rotating axis along the side away from the movable plate.

[0040] In the present application, an elastic limit pin 1 is installed in the arc groove, and the elastic limit pin 1 is used to limit the sliding body when the flushing pipe flushes the front side of the movable plate.

[0041] In the present application, a second elastic limit pin is provided on the top of the recovery tank, and the second elastic limit pin is used to limit the rotating disk when the flushing pipe flushes the back of the movable plate.

[0042] In the present application, the flotation froth is transported from the ore pulp tank to the recovery tank by the flotation scraper:

[0043] Step 51, the reduction motor drives the rotating shaft to rotate, and the movable plate first moves down along the connecting plate under the action of gravity until the movable plate floats on the liquid surface. As the rotating shaft rotates, the bottom of the movable plate always moves along the liquid surface to transport the flotation foam to the recovery tank;

[0044] Step 52, after the movable plate transports the bubbles into the recovery tank, the flushing pipe flushes the front side of the movable plate. As the movable plate rotates, it contacts the flushing pipe and drives the flushing pipe to rotate to the final position relative to the slurry tank. The rotating disk is limited by the elastic limit pin 2. At this time, the flushing pipe flushes the non-bubble pushing side of the movable plate, and the flushing water and foam enter the recovery tank;

[0045] Step 53, as the movable plate continues to move, the movable plate moves downward relative to the connecting plate, the exposed length of the connecting plate decreases, and the movable plate acts on the rotating body, and the rotating body moves to the initial position together with the movable plate. When moving to the initial position, the flushing pipe returns to the initial position. At this time, the sliding body is restricted by the elastic limit pin; after moving to the initial position, as the movable plate continues to rotate, the rotating body deflects relative to the sliding body and compresses the torsion spring. When the movable plate passes through the rotating body, the rotating body is reset under the action of the torsion spring.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The present invention selects magnetite by magnetic separation, selects wolframite by strong magnetic separation (then performs shaking table gravity separation + centrifugal gravity separation to obtain wolframite concentrate), activates sulfide ore by oxalic acid pickling, selects sulfide ore by refloatation, selects scheelite and fluorite by oxalic acid pickling + co-floatation, and finally centrifuges to re-select scheelite concentrate and fluorite concentrate. The recovery grade of each ore is high and the recovery rate is also high. The components recovered in the whole process are as follows: Figure 2 shown. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a process flow chart of the present invention.

[0049] Figure 2 It is a full-process test data diagram of the present invention.

[0050] Figure 3 It is a schematic diagram of the structure inside the magnetic separation tank of the present invention.

[0051] Figure 4 for Figure 3 Structural relationship diagram of the medium magnetic separation drum and the permanent magnet group.

[0052] Figure 5 for Figure 3 Side view of the middle magnetic separation drum away from the drive end.

[0053] Figure 6 Schematic diagram of the internal structure of the flotation machine.

[0054] Figure 7 for Figure 6 Partial schematic diagram of the middle scraper plate.

[0055] Figure 8 for Figure 7 Position relationship diagram of the middle adjustment block and arc groove.

[0056] Fig. 9 for Figure 7 Position relationship diagram of the middle rotating disk and the elastic limit pin;

[0057] Fig.10 This is a positional relationship diagram of the movable plate and the connecting plate. DETAILED DESCRIPTION

[0058] 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.

[0059] 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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.

[0060] Example 1

[0061] like Figure 1 As shown, a full-process beneficiation process for muddy tungsten polymetallic ore includes:

[0062] Step 1, Grinding

[0063] The raw ore is ground to obtain a mud ore with a particle size of -74μm and a weight percentage of 80%-95%. Figure 2 As shown, the mud ore is prepared into 30% slurry;

[0064] Step 2: Magnetic separation of magnetite

[0065] The ore pulp is subjected to weak magnetic roughing with a magnetic field strength of 4000 Gauss to obtain magnetic roughing concentrate and magnetic roughing tailings;

[0066] The magnetic rougher concentrate is subjected to weak magnetic concentration to obtain magnetic rougher concentrate and weak magnetic concentration tailings;

[0067] Step 3: Magnetic separation of wolframite

[0068] The magnetic rougher tailings and weak magnetic concentrate tailings are mixed, and then subjected to strong magnetic separation at 1.0-1.3 Tesla to obtain weak magnetic separation minerals and demagnetized tailings;

[0069] The weak magnetic separation ore is re-selected on a shaking table to obtain wolframite concentrate I and re-selection tailings. The re-selection tailings are re-selected by one coarse and two fine centrifugal re-selection to obtain wolframite concentrate II and wolframite centrifugal tailings. Wolframite concentrate I and wolframite concentrate II are used as target wolframite concentrates.

[0070] Step 4, pickling

[0071] 1kg / t oxalic acid was added to the demagnetized tailings and stirred for 10 minutes to obtain acid-washed sulfide ore;

[0072] Step 5, sulfide ore flotation

[0073] Add 800g / t of water glass, 100g / t of ethyl thiocyanate, 50g / t of xanthate, and 100g / t of BK-205 to the pickled sulfide ore and stir for 2 minutes;

[0074] After all components are fully mixed, they are sent to the flotation machine together for roughing for 4 minutes to obtain roughing concentrate and roughing tailings;

[0075] Add 200g / t of water glass to the rough concentrate, stir for 1min, and concentrate for 3min to obtain concentrated concentrate and concentrated tailings;

[0076] Add 10g / t of ethyl thiocyanate to the selected tailings, stir for 1min, and perform fine sweeping for 3min to obtain fine sweep concentrate and fine sweep tailings;

[0077] Add 10g / t BK-205 to the rougher tailings and stir for 1min, and scavenging for 3min to obtain scavenging concentrate and scavenging tailings. The scavenging concentrate is added to the rougher concentrate.

[0078] The scavenging tailings and the fine scavenging tailings are mixed as the raw ore for the mixed concentration of scheelite and fluorite;

[0079] Step 6: Scheelite-fluorite simultaneous flotation

[0080] Add 4kg / t of oxalic acid and stir for 30min, 1kg / t of water glass and stir for 2min, and 1kg / t of capture agent LLR and stir for 2min to the mixed ore of scavenging tailings and concentrated scavenging tailings, and then put them into the flotation machine to obtain scheelite-fluorite flotation concentrate and co-floating tailings;

[0081] The scheelite-fluorite flotation concentrate is subjected to two blank concentrations to obtain the scheelite-fluorite concentrate;

[0082] Step 7: Scheelite and fluorite separation

[0083] The scheelite-fluorite concentrate is subjected to four centrifugal gravity separations to separate out scheelite concentrate and fluorite concentrate.

[0084] The grade index and cumulative recovery rate index of each step are as follows: Figure 2 shown.

[0085] In step 2, if Figures 3 to 5 As shown, the ore pulp is fed from the feed trough 301 to the magnetic separation drum 302 and enters the magnetic separation trough 304. The magnetic separation drum 302 is provided with a horizontally biased permanent magnetic group 303. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum 302. The feed position is located above one side of the magnetic separation drum 302 at the maximum field strength position.

[0086] The magnetic material in the slurry is adsorbed on the magnetic separation drum 302, and the slurry is then fed to the magnetic separation drum 302 for a second time through the feeding arc plate 305;

[0087] The ore pulp rotates around the respective axes in the magnetic separation drum 302 and the internal permanent magnet group 303. The specific arrangement structure is not limited. The permanent magnet group 303 is a plurality of alternately distributed N poles and S poles. The magnetic material rolls on the surface of the magnetic separation drum 302 and is transported to the concentrate discharge port.

[0088] The magnetic rougher tailings are washed by water in the magnetic separation tank 304 and discharged through the tailings port. The magnetic rougher concentrate continues to pass through the bottom area of ​​the magnetic separation tank 304 and is washed by water, and the weak magnetic concentrate tailings are discharged through the medium ore port.

[0089] The magnetic materials still adsorbed on the magnetic separation drum 302 are discharged from the concentrate discharge port, wherein the concentrate discharge port is located below one side of the magnetic separation drum 302 at the minimum field strength position.

[0090] A magnetic isolation plate 306 is independently arranged between the magnetic separation drum 302 and the permanent magnet group 303. The bottom of the magnetic isolation plate 306 covers the maximum field strength position and is higher than the top of the concentrate discharge port. A top support rod 307 is arranged between the magnetic isolation plate 306 and the permanent magnet group 303. The top support rod 307 can be a threaded telescopic rod. The end of the top support rod 307 away from the magnetic isolation plate 306 is rollingly installed on the outside of the permanent magnet group 109. An eccentric disk 310 is installed at one end of the magnetic isolation plate 306. One end of the permanent magnet group 303 is installed in the magnetic separation drum 302 through the eccentric disk 310. The end of the magnetic isolation plate 306 away from the eccentric disk 310 extends to the outside of the magnetic separation drum 302 through the connecting plate and is independently fixed. One end of the permanent magnet group 303 is equipped with a driver, and one end of the magnetic separation drum 302 is also equipped with a driver. The two drivers are respectively located at both ends of the magnetic separation drum 302. The magnetic isolation plate 303 blocks the position near the minimum field strength to prevent the magnetic minerals on the surface of the magnetic separation drum 103 from continuing to adsorb on the surface, so as to complete the unloading of the ore as much as possible.

[0091] An ore unloading water pipe 308 is arranged outside the magnetic separation drum 302. The ore unloading water pipe 308 is located above one side of the magnetic separation drum 302 at the minimum field strength position and the water flow direction is arranged obliquely downward to facilitate ore unloading.

[0092] The opening and closing openings of appropriate sizes are selected according to the required requirements to obtain the required accuracy and recovery rate. The middle ore opening and the tailing opening are both provided with opening and closing arc plates 309, which are used to adjust the sizes of the middle ore opening and the tailing opening.

[0093] Example 2

[0094] In the above process, Figures 6 to 9 As shown, in step 5, after the components are fully mixed and sent to the flotation machine together, the reagent captures the sulfide ore and floats together with the mixed bubbles. After floating, it is sent to the recovery tank 503 from the slurry tank 502 under the action of the rotating bubble scraper 501;

[0095] The scraping plate 501 includes a connecting plate 5011 and a movable plate 5012. The connecting plate 5011 is partially slidably installed in the movable plate 5012. The movable plate 5012 is a hollow plate and can float on the surface of the liquid when scraping bubbles. The bottom of the movable plate 5012 floats on the surface of the slurry. The connecting plate 5011 is fixed on the rotating shaft 504. The rotating shaft 504 is equipped with an independent reduction motor. An arc groove 505 is provided in the slurry tank 502. An adjustment block 5051 is installed in the arc groove 505. The adjustment block 5051 includes a sliding block slidably fitted in the arc groove 505. The movable plate 5012 comprises a body 50511 and a rotating body 50512 rotatably mounted on the sliding body 50511, a torsion spring is installed between the rotating body 50512 and the sliding body 50511, a connecting rope 506 is installed on the sliding body 50511, one end of the connecting rope 506 is passed around the guide wheel 508 and is connected to the rotating disk 507, the rotating disk 507 and the guide wheel 508 are installed inside the recovery tank 503, a flushing pipe 509 is installed on the rotating disk 507, and a plurality of linearly distributed flushing water outlets are provided on the flushing pipe 509, and the flushing water outlets are used to flush the front and back sides of the movable plate 5012.

[0096] A limit plate 5010 is disposed on the top of the movable plate 5012, and the limit plate 5010 is used to limit the maximum extension length of the connecting plate 5011 relative to the movable plate 5012. A baffle is disposed on the side of the limit plate 5010 facing away from the rotating shaft 504, and the baffle is disposed gradually away from the rotating shaft 504 along the side away from the movable plate 5012, so as to drain the slurry washed on the surface of the movable plate 5012 into the recovery tank 503.

[0097] An elastic limiting pin 5052 is installed in the arc groove 505 , and the elastic limiting pin 5052 is used to limit the sliding body 50511 when the flushing pipe 509 flushes the front side of the movable plate 5012 .

[0098] A second elastic limiting pin 5053 is provided on the top of the recovery tank 503 , and the second elastic limiting pin 5053 is used to limit the rotating disk 507 when the flushing pipe 509 flushes the back of the movable plate 5012 .

[0099] The flotation froth is transported from the slurry tank 502 to the recovery tank 503 by the flotation scraper 501:

[0100] Step 51, the reduction motor drives the rotating shaft 504 to rotate, and the movable plate 5012 first moves down along the connecting plate 5011 under the action of gravity until the movable plate 5012 floats on the liquid surface. As the rotating shaft 504 rotates, the bottom of the movable plate 5012 always moves along the liquid surface to transport the flotation foam to the recovery tank 503;

[0101] Step 52, after the movable plate 5012 transports the bubbles into the recovery tank 503, the flushing pipe 509 flushes the front side of the movable plate 5012. As the movable plate 5012 rotates, it contacts the flushing pipe 509 and drives the flushing pipe 509 to rotate to the final position relative to the slurry tank 502. The rotating disk 507 is limited by the elastic limiting pin 2 5012. At this time, the flushing pipe 509 flushes the non-bubble-pushing side of the movable plate 5012, and the flushing water and foam enter the recovery tank 503;

[0102] Step 53, as the movable plate 5012 continues to move, the movable plate 5012 moves downward relative to the connecting plate 5011, the exposed length of the connecting plate 5011 decreases, and the movable plate 5012 acts on the rotating body 50512. The rotating body 50512 moves to the initial position together with the movable plate 5012. When moving to the initial position, the flushing pipe 509 returns to the initial position. At this time, the sliding body 50511 is restricted by the elastic limit pin 5011; after moving to the initial position, as the movable plate 5012 continues to rotate, the rotating body 50512 deflects relative to the sliding body 50511 and compresses the torsion spring. When the movable plate 5012 passes through the rotating body 50512, the rotating body 50512 is reset under the action of the torsion spring.

[0103] 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 full-process beneficiation process for muddy tungsten polymetallic ore, characterized in that: include: Step 1, Grinding Grind the raw ore to obtain a clay ore with a particle size of -74μm and a weight percentage of 80%-95%, and mix the clay ore into a 30% slurry; Step 2: Magnetic separation of magnetite The ore pulp is subjected to weak magnetic roughing with a magnetic field strength of 4000 Gauss to obtain magnetic roughing concentrate and magnetic roughing tailings; The magnetic rougher concentrate is subjected to weak magnetic concentration to obtain magnetic rougher concentrate and weak magnetic concentration tailings; Step 3: Magnetic separation of wolframite The magnetic rougher tailings and weak magnetic concentrate tailings are mixed, and then subjected to strong magnetic separation at 1.0-1.3 Tesla to obtain weak magnetic separation minerals and demagnetized tailings; The weak magnetic separation ore is re-selected on a shaking table to obtain wolframite concentrate I and re-selection tailings. The re-selection tailings are re-selected by one coarse and two fine centrifugal re-selection to obtain wolframite concentrate II and wolframite centrifugal tailings. Wolframite concentrate I and wolframite concentrate II are used as target wolframite concentrates. Step 4, pickling 1kg / t oxalic acid was added to the demagnetized tailings and stirred for 10 minutes to obtain acid-washed sulfide ore; Step 5, sulfide ore flotation Add 800g / t of water glass, 100g / t of ethyl thiocyanate, 50g / t of xanthate, and 100g / t of BK-205 to the pickled sulfide ore and stir for 2 minutes; After all components are fully mixed, they are sent to the flotation machine together for roughing for 4 minutes to obtain roughing concentrate and roughing tailings; Add 200g / t of water glass to the rough concentrate, stir for 1min, and concentrate for 3min to obtain concentrated concentrate and concentrated tailings; Add 10g / t of ethyl thiocyanate to the selected tailings, stir for 1min, and perform fine sweeping for 3min to obtain fine sweep concentrate and fine sweep tailings; Add 10g / t BK-205 to the rougher tailings and stir for 1min, and scavenging for 3min to obtain scavenging concentrate and scavenging tailings. The scavenging concentrate is added to the rougher concentrate. The scavenging tailings and the fine scavenging tailings are mixed as the raw ore for the mixed concentration of scheelite and fluorite; Step 6: Scheelite-fluorite simultaneous flotation Add 4kg / t of oxalic acid and stir for 30min, 1kg / t of water glass and stir for 2min, and 1kg / t of capture agent LLR and stir for 2min to the mixed ore of scavenging tailings and concentrated scavenging tailings, and then put them into the flotation machine to obtain scheelite-fluorite flotation concentrate and co-floating tailings; The scheelite-fluorite flotation concentrate is subjected to two blank concentrations to obtain the scheelite-fluorite concentrate; Step 7: Scheelite and fluorite separation The scheelite-fluorite concentrate is subjected to four centrifugal gravity separations to obtain scheelite concentrate and fluorite concentrate.

2. The full-process beneficiation process of muddy tungsten polymetallic ore according to claim 1 is characterized in that: In step 2, the ore pulp is fed from the feed trough to the magnetic separation drum and enters the magnetic separation trough. A horizontally biased permanent magnetic group is arranged inside the magnetic separation drum. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum. The feed position is located above one side of the magnetic separation drum at the maximum field strength position. The magnetic material in the slurry is adsorbed on the magnetic separation drum, and the slurry is then fed to the magnetic separation drum for a second time through the feeding arc plate; The slurry rotates around the respective axes in the magnetic separation drum and the internal permanent magnetic group. The permanent magnetic group consists of a plurality of alternating N poles and S poles. The magnetic material rolls on the surface of the magnetic separation drum and is transported to the concentrate discharge port. The magnetic roughing tailings are washed by water in the magnetic separation tank and discharged through the tailings port. The magnetic roughing concentrate continues to pass through the bottom area of ​​the magnetic separation tank and is washed by water, and the weak magnetic concentrate tailings are discharged through the medium ore port. The magnetic material still adsorbed on the magnetic separation drum is discharged from the concentrate discharge port, wherein the concentrate discharge port is located below one side of the magnetic separation drum at the minimum field strength position.

3. The full-process mineral processing technology of muddy tungsten polymetallic ore according to claim 2 is characterized in that: A magnetic isolation plate is independently arranged between the magnetic separation drum and the permanent magnet group, and the magnetic isolation plate is located above the inside of the magnetic separation drum at the minimum field strength position; An ore unloading water pipe is arranged on the outer side of the magnetic separation drum. The ore unloading water pipe is located above one side of the magnetic separation drum at the minimum field strength position and the water flow direction is arranged obliquely downward.

4. The full-process mineral processing technology for muddy tungsten polymetallic ore according to claim 3 is characterized in that: The intermediate ore opening and the tailing opening are both provided with opening and closing arc plates, and the opening and closing arc plates are used to adjust the size of the intermediate ore opening and the tailing opening.

5. A full-process beneficiation process for muddy tungsten polymetallic ore according to claim 4, characterized in that: In step 5, after all components are fully mixed and sent to the flotation machine, the reagent captures the sulfide ore and the mixed bubbles float together. After floating, they are sent from the slurry tank to the recovery tank under the action of the rotating scraper plate; The scraper plate includes a connecting plate and a movable plate. The connecting plate is slidably installed in the movable plate. The movable plate is a hollow plate. The bottom of the movable plate floats on the surface of the slurry. The connecting plate is fixed on the rotating shaft. The rotating shaft is equipped with an independent reduction motor. An arc groove is arranged in the slurry tank. An adjusting block is installed in the arc groove. The adjusting block includes a sliding body slidably fitted in the arc groove and a rotating body rotatably installed on the sliding body. A torsion spring is installed between the rotating body and the sliding body. A connecting rope is installed on the sliding body. One end of the connecting rope is passed around the guide wheel and connected to a rotating disk. The rotating disk and the guide wheel are installed inside the recovery tank. A flushing pipe is installed on the rotating disk. A plurality of linearly distributed flushing water outlets are arranged on the flushing pipe. The flushing water outlets are used to flush the front and back sides of the movable plate.

6. The full-process beneficiation process of muddy tungsten polymetallic ore according to claim 5 is characterized in that: A limit plate is arranged on the top of the movable plate, and the limit plate is used to limit the maximum extension length of the connecting plate relative to the movable plate. A baffle is arranged on the side of the limit plate facing away from the rotating shaft, and the baffle is arranged gradually away from the rotating shaft along the side away from the movable plate.

7. The full-process beneficiation process of muddy tungsten polymetallic ore according to claim 5 is characterized in that: An elastic limit pin 1 is installed in the arc groove, and the elastic limit pin 1 is used to limit the sliding body when the flushing pipe flushes the front side of the movable plate.

8. The full-process beneficiation process of muddy tungsten polymetallic ore according to claim 5 is characterized in that: The top of the recovery tank is provided with a second elastic limit pin, which is used to limit the rotating disk when the flushing pipe flushes the back of the movable plate.

9. The full-process beneficiation process of muddy tungsten polymetallic ore according to claim 5 is characterized in that: The flotation froth is transported from the ore pulp tank to the recovery tank by the flotation scraper: Step 51, the reduction motor drives the rotating shaft to rotate, and the movable plate first moves down along the connecting plate under the action of gravity until the movable plate floats on the liquid surface. As the rotating shaft rotates, the bottom of the movable plate always moves along the liquid surface to transport the flotation foam to the recovery tank; Step 52, after the movable plate transports the bubbles into the recovery tank, the flushing pipe flushes the front side of the movable plate. As the movable plate rotates, it contacts the flushing pipe and drives the flushing pipe to rotate to the final position relative to the slurry tank. The rotating disk is limited by the elastic limit pin 2. At this time, the flushing pipe flushes the non-bubble pushing side of the movable plate, and the flushing water and foam enter the recovery tank; Step 53, as the movable plate continues to move, the movable plate moves downward relative to the connecting plate, the exposed length of the connecting plate decreases, and the movable plate acts on the rotating body, and the rotating body moves to the initial position together with the movable plate. When moving to the initial position, the flushing pipe returns to the initial position. At this time, the sliding body is restricted by the elastic limit pin; after moving to the initial position, as the movable plate continues to rotate, the rotating body deflects relative to the sliding body and compresses the torsion spring. When the movable plate passes through the rotating body, the rotating body is reset under the action of the torsion spring.

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