Non-pressure three-product non-desliming dense medium mineral separation system for barite and fluorite associated minerals

Abstract

The utility model relates to the technical field of dense medium mineral separation, in particular to a non-pressure three-product non-desliming dense medium mineral separation system for barite and fluorite associated minerals. The system comprises a non-pressure three-product dense medium separation unit, a fine-fraction barite medium drainage unit, a fine-fraction fluorite medium drainage unit, a tailing medium drainage unit, a fine-fraction barite dehydration unit and a fine-fraction fluorite dehydration unit, a fine-fraction barite outlet, a fine-fraction fluorite outlet and a light product outlet of the non-pressure three-product separation unit are respectively connected with inlets of a fine-fraction barite medium drainage unit, a fine-fraction fluorite medium drainage unit and a tailing medium drainage unit; and sorting outlets of the fine-fraction barite medium drainage unit and the fine-fraction fluorite medium drainage unit are respectively connected with the fine-fraction barite dehydration unit and the fine-fraction fluorite dehydration unit. The fine-fraction fluorite medium drainage device has the advantages of simple structure, good sorting effect, high comprehensive yield of heavy medium selection and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy medium beneficiation, in particular to a pressureless three-product non-de-sludging heavy medium beneficiation system for barite and fluorite associated minerals. Background Art

[0002] As we all know, barite is an important barium-containing industrial mineral, widely used in oil and gas drilling mud weighting agents and the manufacture of various barium-containing chemical products. Fluorite, primarily composed of calcium fluoride, has an irreplaceable and wide-ranging application due to the unique chemical properties of fluorine atoms. Currently, fluorite is primarily used in three major industries: metallurgy, building materials, and chemicals. It is also used in defense, optics, medicine, refrigeration, electronics, and pesticides. With the continuous advancement of science and technology, the applications of fluorite will continue to expand. my country has abundant barite-fluorite ore resources, but single fluorite or barite deposits are rare. Fluorite deposits primarily consist of co-existing barite and fluorite, and these deposits possess significant reserves. However, barite and fluorite have very similar flotation properties, making flotation separation difficult, making them a difficult ore to process.

[0003] Heavy medium beneficiation can separate barite, fluorite and gangue well according to the difference in specific gravity between the three minerals. However, the traditional heavy medium beneficiation technology for barite-fluorite associated minerals has a pre-desliming process, in which the fine-grained materials are screened out and then fed into the heavy medium beneficiation process. The fine-grained materials and the sorted fluorite ore are fed into the fluorite grinding and flotation process together. However, due to the special properties of barite-fluorite associated minerals, the barite content in the fine-grained materials is relatively high, which will cause the fine-grained barite to settle and block the fluorite flotation cell, seriously affecting the normal production of the flotation process. In addition, the overall yield of heavy medium selection is relatively low. This problem has always been an urgent problem that manufacturers need to solve. Summary of the Invention

[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and to provide a pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals with a simple structure, good sorting effect and high comprehensive yield of heavy medium selection.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals, characterized in that the system comprises a pressureless three-product heavy medium separation unit, a fine-grained barite removal unit, a fine-grained fluorite removal unit, a tailings removal unit, a fine-grained barite dehydration unit, and a fine-grained fluorite dehydration unit, the product outlets of the pressureless three-product separation unit are a coarse-grained barite outlet, a coarse-grained fluorite outlet, and a coarse-grained gangue outlet, the products of the coarse-grained barite outlet, the coarse-grained fluorite outlet, and the coarse-grained gangue outlet are coarse-grained barite, coarse-grained fluorite, and coarse-grained gangue, respectively, and the fine-grained barite outlet, the fine-grained fluorite outlet, and the light product outlet of the pressureless three-product separation unit are respectively connected to the fine-grained barite outlet, the fine-grained fluorite outlet, and the light product outlet. The inlets of the fine-grained barite demediation unit, the fine-grained fluorite demediation unit and the tailings demediation unit are connected, the medium outlets of the fine-grained barite demediation unit, the fine-grained fluorite demediation unit and the tailings demediation unit are respectively connected to the inlet of the pressureless three-product heavy medium separation unit, the sorting outlets of the fine-grained barite demediation unit and the fine-grained fluorite demediation unit are respectively connected to the fine-grained barite dehydration unit and the fine-grained fluorite dehydration unit, the water treatment outlets of the fine-grained barite dehydration unit, the fine-grained fluorite dehydration unit and the tailings demediation unit are respectively connected to the subsequent water treatment units, the sorting outlets of the fine-grained barite dehydration unit and the fine-grained fluorite dehydration unit are respectively the fine-grained barite product outlet and the fine-grained fluorite product outlet.

[0007] The pressureless three-product heavy medium separation unit of the utility model comprises a combined medium barrel, a combined medium pump, a pressureless three-product heavy medium cyclone, a barite fixed screen, a fluorite ore fixed screen, a tailings fixed screen, a barite de-medium screen, a fluorite ore de-medium screen, and a tailings de-medium screen. The outlet of the combined medium barrel is connected to the inlet of the pressureless three-product heavy medium cyclone through the combined medium pump, and the heavy product outlet, the intermediate product outlet and the light product outlet of the pressureless three-product heavy medium cyclone are respectively connected to the inlet of the barite fixed screen, the fluorite fixed screen and the tailings fixed screen. The barite fixed screen, the fluorite fixed screen and the tailings fixed screen are connected. The upper screen outlets of the ore fixed screen and the tailings fixed screen are connected to the inlets of the barite de-mediation screen, the fluorite de-mediation screen and the tailings de-mediation screen respectively; the upper screen outlets of the barite de-mediation screen, the fluorite de-mediation screen and the tailings de-mediation screen are the coarse-grained barite outlet, the coarse-grained fluorite outlet and the coarse-grained gangue outlet respectively; the lower screen outlets of the barite fixed screen, the fluorite fixed screen, the tailings fixed screen, the barite de-mediation screen, the fluorite de-mediation screen and the tailings de-mediation screen are connected to the inlets of the fine-grained barite de-mediation unit, the fine-grained fluorite de-mediation unit and the tailings de-mediation unit respectively.

[0008] The fine-grained barite de-mediation unit described in the utility model includes a barite de-mediation barrel, a barite de-mediation pump, and a barite magnetic separator. The inlet of the barite de-mediation barrel is connected to the barite de-mediation screen and the under-screen outlet of the barite fixed screen. The outlet of the barite de-mediation barrel is connected to the inlet of the barite magnetic separator via the barite de-mediation pump. The magnetic separation product outlet of the barite magnetic separator is connected to the inlet of the combined medium barrel via a pipeline. The non-magnetic product outlet of the barite magnetic separator is connected to the inlet of the fine-grained barite dehydration unit.

[0009] The fine-grained fluorite de-mediuming unit described in the utility model comprises a fluorite ore de-mediuming barrel, a fluorite ore de-mediuming pump, and a fluorite ore magnetic separator. The inlet of the fluorite ore de-mediuming barrel is connected to the fluorite ore de-mediuming screen and the under-screen outlet of the fluorite ore fixed screen. The outlet of the fluorite ore de-mediuming barrel is connected to the inlet of the fluorite ore magnetic separator via the fluorite ore de-mediuming pump. The magnetic separation product outlet of the fluorite ore magnetic separator is connected to the inlet of the combined barrel via a pipeline. The non-magnetic product outlet of the fluorite ore magnetic separator is connected to the inlet of the fine-grained fluorite dehydration unit.

[0010] The tailings de-mediation unit described in the utility model includes a tailings de-mediation barrel, a tailings de-mediation pump, and a tailings magnetic separator. The inlet of the tailings de-mediation barrel is connected to the tailings de-mediation screen and the under-screen outlet of the tailings fixed screen. The outlet of the tailings de-mediation barrel is connected to the inlet of the tailings magnetic separator via the tailings de-mediation pump. The magnetic separation product outlet of the tailings magnetic separator is connected to the inlet of the combined medium barrel via a pipeline. The non-magnetic product outlet of the tailings magnetic separator is a water treatment outlet, and the water treatment outlet is connected to a subsequent water treatment unit.

[0011] The fine-grained barite dehydration unit described in the utility model includes a fine-grained barite feeding barrel, a fine-grained barite feeding pump, a fine-grained barite concentrating cyclone, and a fine-grained barite dehydration screen. The inlet of the fine-grained barite feeding barrel is connected to the non-magnetic product outlet of the barite magnetic separator, the outlet of the fine-grained barite feeding barrel is connected to the inlet of the fine-grained barite concentrating cyclone via the fine-grained barite feeding pump, the bottom flow outlet of the fine-grained barite concentrating cyclone is connected to the inlet of the fine-grained barite dehydration screen, the overflow outlet of the fine-grained barite concentrating cyclone is a water treatment outlet, the screen outlet of the fine-grained barite dehydration screen is a fine-grained barite outlet, and the sun-drying outlet of the fine-grained barite dehydration screen is connected to the inlet of the fine-grained barite feeding barrel.

[0012] The fine-grained fluorite dehydration unit described in the utility model includes a fine-grained fluorite feeding barrel, a fine-grained fluorite feeding pump, a fine-grained fluorite concentrating cyclone, and a fine-grained fluorite dehydration screen. The inlet of the fine-grained fluorite feeding barrel is connected to the non-magnetic product outlet of the fluorite ore magnetic separator, the outlet of the fine-grained fluorite feeding barrel is connected to the inlet of the fine-grained fluorite concentrating cyclone via the fine-grained fluorite feeding pump, the underflow outlet of the fine-grained fluorite concentrating cyclone is connected to the inlet of the fine-grained fluorite dehydration screen, the overflow outlet of the fine-grained fluorite concentrating cyclone is a water treatment outlet, the screen outlet of the fine-grained fluorite dehydration screen is a fine-grained fluorite stone outlet, and the sun-drying outlet of the fine-grained fluorite dehydration screen is connected to the inlet of the fine-grained fluorite feeding barrel.

[0013] The cone angle of a first stage of the heavy medium cyclone of the three-product pressure heavy medium cyclone of the utility model is 5°-20°.

[0014] The cone angle of the second stage heavy medium cyclone of the three-product heavy medium cyclone of the utility model is 25°-45°.

[0015] The sieve hole size of the fine-grained fluorite dewatering screen of the utility model is 0.15-0.30 mm, and the sieve hole size of the fine-grained barite dewatering screen is 0.15-0.3 mm.

[0016] Due to the adoption of the above structure, the utility model has the advantages of simple structure, good separation effect, high comprehensive yield of heavy medium selection, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0018] The present invention is further described below with reference to the accompanying drawings:

[0019] As shown in the accompanying drawings, a pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals is characterized in that the system includes a pressureless three-product heavy medium separation unit, a fine-grained barite removal unit, a fine-grained fluorite removal unit, a tailings removal unit, a fine-grained barite dehydration unit, and a fine-grained fluorite dehydration unit. The product outlets of the pressureless three-product separation unit are a coarse-grained barite outlet, a coarse-grained fluorite outlet, and a coarse-grained gangue outlet. The products of the coarse-grained barite outlet, the coarse-grained fluorite outlet, and the coarse-grained gangue outlet are coarse-grained barite, coarse-grained fluorite, and coarse-grained gangue, respectively. The fine-grained barite outlet, the fine-grained fluorite outlet, and the light product outlet of the pressureless three-product separation unit are respectively It is connected to the inlet of the fine-grained barite de-medium unit, the fine-grained fluorite de-medium unit and the tailings de-medium unit. The medium outlets of the fine-grained barite de-medium unit, the fine-grained fluorite de-medium unit and the tailings de-medium unit are respectively connected to the inlet of the pressureless three-product heavy medium separation unit. The sorting outlets of the fine-grained barite de-medium unit and the fine-grained fluorite de-medium unit are respectively connected to the fine-grained barite dehydration unit and the fine-grained fluorite dehydration unit. The water treatment outlets of the fine-grained barite dehydration unit, the fine-grained fluorite dehydration unit and the tailings de-medium unit are respectively connected to the subsequent water treatment units. The sorting outlets of the fine-grained barite dehydration unit and the fine-grained fluorite dehydration unit are the fine-grained barite product outlet and the fine-grained fluorite product outlet.

[0020] Furthermore, the pressureless three-product heavy medium separation unit includes a combined medium barrel 2, a combined medium pump, a pressureless three-product heavy medium cyclone 3, a barite fixed screen 4, a fluorite fixed screen 11, a tailings fixed screen 18, a barite de-medium screen 5, a fluorite de-medium screen 12, and a tailings de-medium screen 19. The outlet of the combined medium barrel 2 is connected to the inlet of the pressureless three-product heavy medium cyclone 3 through the combined medium pump, and the heavy product outlet, intermediate product outlet and light product outlet of the pressureless three-product heavy medium cyclone 3 are respectively connected to the inlet of the barite fixed screen 4, the fluorite fixed screen 11 and the tailings fixed screen 18. The barite fixed screen 4, the fluorite fixed screen 11 and the tailings fixed screen 18 are connected. The upper screen outlets of the fixed screen 11 and the tailings fixed screen 18 are respectively connected to the inlets of the barite de-mediation screen 5, the fluorite de-mediation screen 12 and the tailings de-mediation screen 19. The upper screen outlets of the barite de-mediation screen 5, the fluorite de-mediation screen 12 and the tailings de-mediation screen 19 are respectively the coarse-grained barite outlet, the coarse-grained fluorite outlet and the coarse-grained gangue outlet. The lower screen outlets of the barite fixed screen 4, the fluorite fixed screen 11, the tailings fixed screen 18, the barite de-mediation screen 5, the fluorite de-mediation screen 12 and the tailings de-mediation screen 19 are respectively connected to the inlets of the fine-grained barite de-mediation unit, the fine-grained fluorite de-mediation unit and the tailings de-mediation unit.

[0021] Furthermore, the fine-grained barite de-mediation unit includes a barite de-mediation barrel 6, a barite de-mediation pump, and a barite magnetic separator 7. The inlet of the barite de-mediation barrel 6 is connected to the barite de-mediation screen 5 and the under-screen outlet of the barite fixed screen 4. The outlet of the barite de-mediation barrel 6 is connected to the inlet of the barite magnetic separator 7 via the barite de-mediation pump. The magnetic separation product outlet of the barite magnetic separator 7 is connected to the inlet of the combined medium barrel 2 via a pipeline, and the non-magnetic product outlet of the barite magnetic separator 7 is connected to the inlet of the fine-grained barite dehydration unit.

[0022] Furthermore, the fine-grained fluorite de-mediation unit includes a fluorite ore de-mediation barrel 13, a fluorite ore de-mediation pump, and a fluorite ore magnetic separator 14. The inlet of the fluorite ore de-mediation barrel 13 is connected to the fluorite ore de-mediation screen 12 and the under-screen outlet of the fluorite ore fixed screen 11. The outlet of the fluorite ore de-mediation barrel 13 is connected to the inlet of the fluorite ore magnetic separator 14 via the fluorite ore de-mediation pump. The magnetic separation product outlet of the fluorite magnetic separator 14 is connected to the inlet of the combined medium barrel 2 via a pipeline. The non-magnetic product outlet of the fluorite magnetic separator 14 is connected to the inlet of the fine-grained fluorite dehydration unit.

[0023] Furthermore, the tailings de-mediation unit includes a tailings de-mediation barrel 20, a tailings de-mediation pump, and a tailings magnetic separator 21. The inlet of the tailings de-mediation barrel 20 is connected to the tailings de-mediation screen 19 and the under-screen outlet of the tailings fixed screen 18. The outlet of the tailings de-mediation barrel 20 is connected to the inlet of the tailings magnetic separator 21 via the tailings de-mediation pump. The magnetic separation product outlet of the tailings magnetic separator 21 is connected to the inlet of the combined media barrel 2 via a pipeline. The non-magnetic product outlet of the tailings magnetic separator 21 is a water treatment outlet, and the water treatment outlet is connected to the subsequent water treatment unit.

[0024] Furthermore, the fine-grained barite dehydration unit includes a fine-grained barite feeding barrel 8, a fine-grained barite feeding pump, a fine-grained barite concentrating cyclone 9, and a fine-grained barite dehydration screen 10. The inlet of the fine-grained barite feeding barrel 8 is connected to the non-magnetic product outlet of the barite magnetic separator 7, the outlet of the fine-grained barite feeding barrel 8 is connected to the inlet of the fine-grained barite concentrating cyclone 9 via the fine-grained barite feeding pump, the bottom flow outlet of the fine-grained barite concentrating cyclone 9 is connected to the inlet of the fine-grained barite dehydration screen 10, the overflow outlet of the fine-grained barite concentrating cyclone 9 is a water treatment outlet, the upper screen outlet of the fine-grained barite dehydration screen 10 is a fine-grained barite outlet, and the sun-drying outlet of the fine-grained barite dehydration screen 10 is connected to the inlet of the fine-grained barite feeding barrel 8.

[0025] Furthermore, the particle-sized fluorite dehydration unit includes a fine-sized fluorite feeding barrel 15, a fine-sized fluorite feeding pump, a fine-sized fluorite concentrating cyclone 16, and a fine-sized fluorite dehydration screen 17. The inlet of the fine-sized fluorite feeding barrel 15 is connected to the non-magnetic product outlet of the fluorite ore magnetic separator 14, the outlet of the fine-sized fluorite feeding barrel 15 is connected to the inlet of the fine-sized fluorite concentrating cyclone 16 via the fine-sized fluorite feeding pump, the bottom flow outlet of the fine-sized fluorite concentrating cyclone 16 is connected to the inlet of the fine-sized fluorite dehydration screen 17, the overflow outlet of the fine-sized fluorite concentrating cyclone 16 is a water treatment outlet, the above-screen outlet of the fine-sized fluorite dehydration screen 17 is a fine-sized fluorite stone outlet, and the under-sun outlet of the fine-sized fluorite dehydration screen 17 is connected to the inlet of the fine-sized fluorite feeding barrel 15.

[0026] Furthermore, the cone angle of a first stage of the heavy medium cyclone of the third pressure product heavy medium cyclone is 5°-20°.

[0027] Furthermore, the cone angle of the second stage heavy medium cyclone of the third pressure product heavy medium cyclone is 25°-45°.

[0028] Furthermore, the mesh size of the fine-grained fluorite dewatering screen 17 is 0.15-0.30 mm, and the mesh size of the fine-grained barite dewatering screen 10 is 0.15-0.3 mm.

[0029] The heavy medium in the above-mentioned combined barrel 2 is ferrosilicon powder, the magnetic content of the ferrosilicon powder is ≥90%, the fineness of -325 mesh accounts for 80%-95%, and the content of -400 mesh is 75%-90%. The density of the heavy medium suspension in the combined barrel 2 is 1.70-3.60g / cm³, and the overflow fineness of the concentrating cyclone is -200 mesh ≥95%.

[0030] Example:

[0031] A barite-fluorite mine in Guizhou has a CaF2 grade of 35%, a barite content of 40%, a particle size of -10mm, and a -0.5mm content of 20%. The specific steps are as follows: a pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals is used to separate the fluorite ore. The specific steps are as follows:

[0032] In the mixing barrel 2, ferrosilicon powder (magnetic content ≥ 90%, fineness -325 mesh accounts for 80%-95%, and -400 mesh content accounts for 75%-90%) and water are mixed into a heavy medium suspension with a density of 2.40 g / m3, which is transported to the pressureless three-product heavy medium cyclone 3 at a pressure of 0.16 MPa through the mixing pump. The crushed raw ore is fed into the pressureless three-product heavy medium cyclone 3 from the feeding silo through the feeding belt 1 for sorting in the pressureless three-product heavy medium cyclone 3. The overflow outlet of the first stage heavy medium cyclone of the pressureless three-product heavy medium cyclone 3 is connected to the tailings fixed screen 18 and the tailings de-mediation screen 19 in sequence through the chute. The overflow outlet of the second stage heavy medium cyclone of the pressureless three-product heavy medium cyclone 3 is connected to the fluorite ore fixed screen 11 and the fluorite ore de-mediation screen 12 in sequence through the chute. The bottom flow outlet of the second-stage heavy medium cyclone of the heavy medium cyclone 3 is connected to the barite fixed screen 4 and the barite de-mediation screen 5 in sequence through a chute. The material on the tailings de-mediation screen 19 is a coarse-grained tailings product with a comprehensive yield of 20% and a CaF2 grade of 4.5%, which can be stored or sold. The material on the fluorite ore de-mediation screen 12 is a coarse-grained fluorite ore product with a comprehensive yield of 36% and a CaF2 grade of 58%, which is fed into the subsequent grinding and flotation system. The material on the barite de-mediation screen 5 is a coarse-grained barite product with a comprehensive yield of 28% and a specific gravity of 4.5g / cm3, which is sold directly.

[0033] The under-screen outlets of the fluorite fixed screen 11 and the fluorite de-mediation screen 12 are connected to the fluorite dilution barrel 13 via a pipeline. The outlet of the fluorite dilution barrel 13 is pumped to the fluorite magnetic separator 14 via a fluorite dilution pump for de-mediation of fine-grained fluorite. The fine-grained fluorite material at the non-magnetic separation product outlet of the fluorite magnetic separator 14 is fed into the fine-grained fluorite feeding barrel via a pipeline. The discharge port of the fine-grained fluorite feeding barrel is transported to the feed end of the fine-grained fluorite concentration cyclone via a fine-grained fluorite slurry pump. The overflow of the fine-grained fluorite cyclone is fed into the thickener for processing via a pipeline. The underflow outlet of the fine-grained fluorite concentration cyclone is connected to the screen distributor of the fine-grained fluorite dewatering screen. The screen product of the fine-grained fluorite dewatering screen is dehydrated as a qualified fine-grained fluorite product. The grade of the fine-grained fluorite ore is 52%, and the fine-grained yield is 5%.

[0034] The barite ore fixed screen and the barite ore de-mediation screen are connected to the barite ore dilute medium barrel through a pipeline. The outlet of the barite dilute medium barrel 6 is pumped to the barite magnetic separator 7 through a barite dilute medium pump for fine-grained barite de-mediation. The fine-grained barite material at the outlet of the non-magnetic separation product of the barite magnetic separator 7 is fed into the fine-grained barite feeding barrel through a pipeline. The discharge port of the fine-grained barite feeding barrel is transported to the feed port end of the fine-grained barite concentrating cyclone 9 through a fine-grained barite slurry pump. The outlet of the bottom flow of the fine-grained barite concentrating cyclone 9 is connected to the screen distributor of the fine-grained barite dewatering screen 10. The screen product of the fine-grained barite dewatering screen 10 is dehydrated as a qualified fine-grained barite product. The specific gravity of the fine-grained barite is 4.7g / cm 3 , sold directly with a yield of 11%.

[0035] The advantages of the traditional heavy medium separation process and the patented full-size heavy medium separation system are compared as follows:

[0036]

[0037] Therefore, it can be seen that the comprehensive yield of heavy medium selection reaches 100%, the grade of fine-grained fluorite ore is 52%, the yield of fine-grained fluorite ore is 5%; the specific gravity of fine-grained barite is 4.7g / cm 3 The yield of fine-grained barite is 11%. The utility model of this patent adopts the above structure, which has the advantages of simple structure, good sorting effect, and high comprehensive yield of heavy medium selection.

Claims

1. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals, characterized in that The system includes a pressureless three-product heavy medium separation unit, a fine-grained barite removal unit, a fine-grained fluorite removal unit, a tailings removal unit, a fine-grained barite dehydration unit, and a fine-grained fluorite dehydration unit. The product outlets of the pressureless three-product separation unit are a coarse-grained barite outlet, a coarse-grained fluorite outlet, and a coarse-grained gangue outlet. The products of the coarse-grained barite outlet, the coarse-grained fluorite outlet, and the coarse-grained gangue outlet are coarse-grained barite, coarse-grained fluorite, and coarse-grained gangue, respectively. The fine-grained barite outlet, the fine-grained fluorite outlet, and the light product outlet of the pressureless three-product separation unit are connected to the fine-grained barite removal unit and the fine-grained fluorite removal unit, respectively. The medium outlets of the fine-grained barite demediation unit, the fine-grained fluorite demediation unit and the tailings demediation unit are respectively connected to the inlet of the pressureless three-product heavy medium separation unit, the sorting outlets of the fine-grained barite demediation unit and the fine-grained fluorite demediation unit are respectively connected to the fine-grained barite dehydration unit and the fine-grained fluorite dehydration unit, the water treatment outlets of the fine-grained barite dehydration unit, the fine-grained fluorite dehydration unit and the tailings demediation unit are respectively connected to the subsequent water treatment units, the sorting outlets of the fine-grained barite dehydration unit and the fine-grained fluorite dehydration unit are the fine-grained barite product outlet and the fine-grained fluorite product outlet respectively.

2. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 1, characterized in that The pressureless three-product heavy medium separation unit includes a combined medium barrel, a combined medium pump, a pressureless three-product heavy medium cyclone, a barite fixed screen, a fluorite ore fixed screen, a tailings fixed screen, a barite de-medium screen, a fluorite ore de-medium screen, and a tailings de-medium screen. The outlet of the combined medium barrel is connected to the inlet of the pressureless three-product heavy medium cyclone through the combined medium pump, and the heavy product outlet, intermediate product outlet and light product outlet of the pressureless three-product heavy medium cyclone are respectively connected to the inlet of the barite fixed screen, the fluorite fixed screen and the tailings fixed screen. The barite fixed screen, the fluorite fixed screen and the tailings fixed screen are connected. The upper screen outlets of the fixed ore screen and the fixed tailings screen are connected to the inlets of the barite de-mediation screen, the fluorite ore de-mediation screen and the tailings de-mediation screen respectively; the upper screen outlets of the barite de-mediation screen, the fluorite ore de-mediation screen and the tailings de-mediation screen are the coarse-grained barite outlet, the coarse-grained fluorite outlet and the coarse-grained gangue outlet respectively; the lower screen outlets of the fixed barite screen, the fixed fluorite screen, the fixed tailings screen, the barite de-mediation screen, the fluorite ore de-mediation screen and the tailings de-mediation screen are connected to the inlets of the fine-grained barite de-mediation unit, the fine-grained fluorite de-mediation unit and the tailings de-mediation unit respectively.

3. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 1, characterized in that The fine-grained barite de-mediation unit includes a barite thinning barrel, a barite thinning pump, and a barite magnetic separator. The inlet of the barite thinning barrel is connected to the barite de-mediation screen and the underscreen outlet of the barite fixed screen. The outlet of the barite thinning barrel is connected to the inlet of the barite magnetic separator via the barite thinning pump. The magnetic separation product outlet of the barite magnetic separator is connected to the inlet of the combined barrel via a pipeline. The non-magnetic product outlet of the barite magnetic separator is connected to the inlet of the fine-grained barite dehydration unit.

4. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 1, characterized in that The fine-grained fluorite de-mediuming unit includes a fluorite ore de-mediuming barrel, a fluorite ore de-mediuming pump, and a fluorite ore magnetic separator. The inlet of the fluorite ore de-mediuming barrel is connected to the fluorite ore de-mediuming screen and the under-screen outlet of the fluorite ore fixed screen. The outlet of the fluorite ore de-mediuming barrel is connected to the inlet of the fluorite ore magnetic separator via the fluorite ore de-mediuming pump. The magnetic separation product outlet of the fluorite magnetic separator is connected to the inlet of the combined barrel via a pipeline. The non-magnetic product outlet of the fluorite magnetic separator is connected to the inlet of the fine-grained fluorite dehydration unit.

5. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 1, characterized in that The tailings de-mediation unit includes a tailings de-mediation barrel, a tailings de-mediation pump, and a tailings magnetic separator. The inlet of the tailings de-mediation barrel is connected to the tailings de-mediation screen and the under-screen outlet of the tailings fixed screen. The outlet of the tailings de-mediation barrel is connected to the inlet of the tailings magnetic separator via the tailings de-mediation pump. The magnetic separation product outlet of the tailings magnetic separator is connected to the inlet of the combined medium barrel via a pipeline. The non-magnetic product outlet of the tailings magnetic separator is a water treatment outlet, and the water treatment outlet is connected to a subsequent water treatment unit.

6. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 1, characterized in that The fine-grained barite dehydration unit includes a fine-grained barite feeding barrel, a fine-grained barite feeding pump, a fine-grained barite concentrating cyclone, and a fine-grained barite dehydration screen. The inlet of the fine-grained barite feeding barrel is connected to the non-magnetic product outlet of the barite magnetic separator, the outlet of the fine-grained barite feeding barrel is connected to the inlet of the fine-grained barite concentrating cyclone through the fine-grained barite feeding pump, the underflow outlet of the fine-grained barite concentrating cyclone is connected to the inlet of the fine-grained barite dehydration screen, the overflow outlet of the fine-grained barite concentrating cyclone is a water treatment outlet, the upper screen outlet of the fine-grained barite dehydration screen is a fine-grained barite outlet, and the sun-drying outlet of the fine-grained barite dehydration screen is connected to the inlet of the fine-grained barite feeding barrel.

7. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 1, characterized in that The fine-grained fluorite dehydration unit includes a fine-grained fluorite feeding barrel, a fine-grained fluorite feeding pump, a fine-grained fluorite concentrating cyclone, and a fine-grained fluorite dehydration screen. The inlet of the fine-grained fluorite feeding barrel is connected to the non-magnetic product outlet of the fluorite ore magnetic separator, the outlet of the fine-grained fluorite feeding barrel is connected to the inlet of the fine-grained fluorite concentrating cyclone via the fine-grained fluorite feeding pump, the underflow outlet of the fine-grained fluorite concentrating cyclone is connected to the inlet of the fine-grained fluorite dehydration screen, the overflow outlet of the fine-grained fluorite concentrating cyclone is the water treatment outlet, the screen outlet of the fine-grained fluorite dehydration screen is the fine-grained fluorite stone outlet, and the underflow outlet of the fine-grained fluorite dehydration screen is connected to the inlet of the fine-grained fluorite feeding barrel.

8. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 2, characterized in that The cone angle of a heavy medium cyclone of the third-pressure product heavy medium cyclone is 5°-20°.

9. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 2, characterized in that The cone angle of the second stage heavy medium cyclone of the three-pressure product heavy medium cyclone is 25°-45°.

10. A pressureless three-product non-de-sliming heavy medium beneficiation system for barite and fluorite associated minerals according to claim 7, characterized in that The mesh size of the fine-grained fluorite dewatering screen is 0.15-0.30 mm, and the mesh size of the fine-grained barite dewatering screen is 0.15-0.3 mm.

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