Collophanite sorting system
Through the granular ore sorting system combining crushing screening system and heavy medium cyclone combined with color sorting system, the problems of poor sorting effect and high cost in the existing technology are solved, efficient and environmentally friendly granular ore sorting are achieved, and concentrate grade and recovery rate are improved.
Patent Information
- Application Number
- CN202421969755.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-14
AI Technical Summary
In the prior art, there are problems such as poor sorting effect, long return cycle and high production cost.
The sorting system including crushing screening system, first-level heavy media sorting system, second-level heavy media sorting system, color sorting system and fine-grain processing system is adopted. Through narrow-level ore feeding and sorting, heavy media cyclone is used for efficient sorting, and dolomite and its continuous ore are eliminated in combination with the color sorting system, eliminating the flotation process.
It improves the selection accuracy and concentrate grade, reduces production costs, simplifies equipment, improves the degree of automation, shortens the construction period, and achieves environmentally friendly and efficient sorting.
Smart Images
Figure CN223055813U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of mineral processing, and particularly relates to a collophanite separation system. Background Art
[0002] Phosphorus, as a basic raw material, is a precious resource indispensable for the development of the national economy and has important utilization values in aspects such as the chemical industry, agriculture, ceramics, food, medicine, light industry, and metallurgy industry. As the main chemical raw material of phosphorus element, phosphate rock is a strategic resource of our country. It is of great significance for ensuring the development of our country's agriculture, ensuring national food security and the sustainable development of basic industries such as the chemical industry, participating in national competition, and transforming resource advantages into economic advantages, and plays a crucial role in the rapid development of the national economy.
[0003] Currently, the main separation methods for collophanite are as follows: 1) Flotation method: mainly used for the separation of fine-grained and micro-fine-grained collophanite, including direct flotation, reverse flotation, reverse-direct flotation, direct-reverse flotation, etc.; 2) Gravity separation method: As an advanced separation method, the heavy medium separation method can separate according to the density difference between gangue minerals and phosphorus minerals; 3) Scrubbing and desliming method: As a physical beneficiation method, it is mainly used for weathered or muddy phosphate ores; 4) Chemical beneficiation method: mainly applies chemical methods to reduce impurity content and improve the purity of useful minerals.
[0004] The flotation method is a very commonly used separation method, but there are problems such as high cost, fine particle size of foam products, difficult transportation and treatment, etc. Especially in recent years, with the increasing environmental protection requirements in our country, it has faced great pressure to process these ores; the heavy medium separation method is difficult to balance separation indexes such as concentrate grade and concentrate recovery rate for some ores with small specific gravity differences between associated ores and gangue minerals; the scrubbing and desliming method has a low enrichment ratio and poor universality; the chemical beneficiation method has a high processing cost and high requirements for equipment, and is commonly used in the fine processing link of concentrate products and is difficult to be popularized and applied when treating raw ores. Utility Model Content
[0005] The purpose of this application is to provide a collophanite separation system to solve the problems of poor separation effect, long payback period, and high production cost in the prior art.
[0006] The embodiments of this application can be realized through the following technical solutions:
[0007] A collophanite separation system includes a crushing and screening system, a first-stage heavy medium separation system, a second-stage heavy medium separation system, a color sorting system, and a fine-grained treatment system;
[0008] The outlet of the crushing and screening system is respectively connected to the inlets of the first-stage heavy medium separation system, the second-stage heavy medium separation system, and the fine-grained treatment system;
[0009] The outlet of the first-stage heavy medium separation system includes a coarse concentrate product outlet, a first tailing product outlet, a first-stage thickening underflow product outlet, and a first-stage thickening overflow product outlet. Among them, the coarse concentrate product outlet is connected to the inlet of the color sorting system, the first-stage thickening underflow product outlet is connected to the inlet of the fine particle size treatment system, and the first-stage thickening overflow product outlet is connected to the crushing and screening system;
[0010] The outlet of the second-stage heavy medium separation system includes a second concentrate product outlet, a third tailing product outlet, a second-stage thickening underflow product outlet, and a first return water outlet. Among them, the second-stage thickening underflow product outlet is connected to the inlet of the fine particle size treatment system;
[0011] The outlet of the color sorting system includes a first concentrate product outlet and a second tailing product outlet;
[0012] The outlet of the fine particle size treatment system includes a fine mud product outlet, a fine particle product outlet, and a second return water outlet.
[0013] Further, the crushing and screening system includes a crusher and a sizing screen. The outlet of the crusher is connected to the inlet of the sizing screen. The upper screen oversize product outlet of the sizing screen is the a-b particle size product outlet, the lower screen oversize product outlet of the sizing screen is the b-c particle size product outlet, and the lower screen undersize product outlet of the sizing screen is the -c particle size product outlet. Among them, the a-b particle size product outlet is connected to the inlet of the first-stage heavy medium separation system, the b-c particle size product outlet is connected to the inlet of the second-stage heavy medium separation system, and the -c particle size product outlet is connected to the inlet of the fine particle size treatment system.
[0014] Further, the first-stage heavy medium separation system includes a first-stage mixing tank, a first-stage heavy medium cyclone, a first-stage No. 1 vibrating desliming screen, a first-stage No. 2 pre-desliming screen, a first-stage No. 2 vibrating desliming screen, a first-stage magnetic separator, and a first-stage thickening cyclone. The a-b particle size product outlet of the crushing and screening system is connected to the inlet of the first-stage mixing tank, and the outlet of the first-stage mixing tank is connected to the inlet of the first-stage heavy medium cyclone;
[0015] The underflow outlet of the first-stage heavy medium cyclone is connected to the first-stage No. 1 vibrating desliming screen, and the screen oversize product outlet of the first-stage No. 1 vibrating desliming screen is the coarse concentrate product outlet;
[0016] The overflow outlet of the first-stage heavy medium cyclone is connected to the inlet of the first-stage No. 2 pre-desliming screen. The screen oversize outlet of the first-stage No. 2 pre-desliming screen is connected to the inlet of the first-stage No. 2 vibrating desliming screen, and the screen oversize product outlet of the first-stage No. 2 vibrating desliming screen is the first tailing product outlet.
[0017] Furthermore, there are two under-screen outlets for the first-stage No. 1 vibrating medium-separating screen. One of the under-screen outlets is connected to the inlet of the first-stage magnetic separator, and the other under-screen outlet is connected to the inlet of the first-stage mixing tank through the first-stage No. 1 shunt pipe.
[0018] The first-stage dense medium separation system further includes a first-stage shunt box. The under-screen outlet of the first-stage No. 2 pre-medium-separating screen is connected to the inlet of the first-stage shunt box, or is simultaneously connected to the inlets of the first-stage shunt box and the first-stage mixing tank.
[0019] Furthermore, the under-screen product outlet of the first-stage No. 2 vibrating medium-separating screen and the dilute medium outlet of the first-stage shunt box are respectively connected to the inlet of the first-stage magnetic separator.
[0020] The concentrate product outlet of the first-stage magnetic separator and the combined medium outlet of the first-stage shunt box are respectively connected to the inlet of the first-stage mixing tank.
[0021] The tailings product outlet of the first-stage magnetic separator is connected to the inlet of the first-stage thickening cyclone. The overflow outlet of the first-stage thickening cyclone is connected to the inlet of the sizing screen, and the underflow outlet of the first-stage thickening cyclone is connected to the inlet of the fine particle size treatment system.
[0022] Furthermore, the second-stage dense medium separation system includes a second-stage mixing tank, a second-stage dense medium cyclone, a second-stage No. 1 vibrating medium-separating screen, a second-stage No. 2 pre-medium-separating screen, a second-stage No. 2 vibrating medium-separating screen, a second-stage magnetic separator, and a second-stage thickening cyclone. The inlet of the second-stage mixing tank is connected to the b-c particle size product outlet of the crushing and screening system, and the outlet of the second-stage mixing tank is connected to the inlet of the second-stage dense medium cyclone.
[0023] The underflow outlet of the second-stage dense medium cyclone is connected to the second-stage No. 1 vibrating medium-separating screen, and the over-screen product outlet of the second-stage No. 1 vibrating medium-separating screen is the second concentrate product outlet.
[0024] The overflow outlet of the second-stage dense medium cyclone is connected to the inlet of the second-stage No. 2 pre-medium-separating screen. The over-screen outlet of the second-stage No. 2 pre-medium-separating screen is connected to the inlet of the second-stage No. 2 vibrating medium-separating screen, and the over-screen product outlet of the second-stage No. 2 vibrating medium-separating screen is the third tailings product outlet.
[0025] Furthermore, there are two under-screen outlets for the second-stage No. 1 vibrating medium-separating screen. One of the under-screen outlets is connected to the inlet of the second-stage magnetic separator, and the other under-screen outlet is connected to the second-stage mixing tank through the second-stage No. 1 shunt pipe.
[0026] The second-stage dense medium separation system further includes a second-stage shunt box. The under-screen outlet of the second-stage No. 2 pre-medium-separating screen is connected to the inlet of the second-stage shunt box, or is simultaneously connected to the inlets of the second-stage shunt box and the second-stage mixing tank.
[0027] Further, the underflow product outlet of the secondary No. 1 vibrating medium separating screen, the underflow product outlet of the secondary No. 2 vibrating medium separating screen, and the dilute medium outlet of the secondary shunt box are respectively connected to the inlet of the secondary magnetic separator;
[0028] The concentrate product outlet of the secondary magnetic separator and the combined medium outlet of the secondary shunt box are connected to the inlet of the secondary mixing tank;
[0029] The tailing product outlet of the secondary magnetic separator is connected to the inlet of the secondary thickening cyclone. The overflow outlet of the secondary thickening cyclone is the first return water, and the underflow outlet of the secondary thickening cyclone is connected to the inlet of the fine particle size treatment system.
[0030] Further, the fine particle size treatment system includes a tertiary thickening cyclone, a thickener, a dewatering screen, and a filter press;
[0031] The -c particle size product outlet of the sizing screen, the underflow outlet of the primary thickening cyclone, and the underflow outlet of the secondary thickening cyclone are respectively connected to the inlet of the tertiary thickening cyclone. The overflow outlet of the tertiary thickening cyclone is connected to the thickener, the underflow outlet of the tertiary thickening cyclone is connected to the dewatering screen, and the oversize product outlet of the dewatering screen is the fine particle product outlet;
[0032] The underflow product outlet of the dewatering screen is connected to the inlet of the tertiary thickening cyclone. The underflow outlet of the thickener is connected to the inlet of the filter press. The overflow outlet of the thickener is the second return water outlet. The filtrate outlet of the filter press is connected to the inlet of the thickener, and the filter cake outlet of the filter press is the fine mud product outlet.
[0033] Further, the sieve hole size of the upper layer sieve of the sizing screen is 6.0 mm - 12.0 mm, and the sieve hole size of the lower layer screen of the sizing screen is 0.5 mm - 1.0 mm.
[0034] The phosphate rock separation system provided by the embodiment of the present application has at least the following beneficial effects:
[0035] 1. Since the above system is adopted, the feed of narrow grades is separately processed, and each narrow particle size can be sorted according to its own required separation density. The separation density setting is more accurate, which can create good conditions for the efficient separation of the heavy medium cyclone.
[0036] 2. The ore washability among the same particle sizes is similar, which is more conducive to improving the separation accuracy of the heavy medium cyclone.
[0037] 3. The narrow particle size is selected, weakening the influence of particle size on the separation effect, and enabling the ore separation to be carried out based on density difference as much as possible.
[0038] 4. The primary heavy medium separation system can reject the shale with a light specific gravity. However, the specific gravity of some associated minerals of dolomite and phosphate ore is close to that of the phosphate concentrate, resulting in some associated minerals being sorted into the phosphate concentrate, making it difficult to obtain qualified phosphate concentrate. However, this part of the coarse phosphate concentrate can remove dolomite and its associated minerals through the chromaticity recognition of the color sorting system, which can significantly improve the concentrate grade; the secondary heavy medium separation system has the advantages of high feed grade of the processed materials and relatively sufficient monomer dissociation degree of phosphate-containing minerals. Therefore, qualified phosphate concentrate can be directly obtained.
[0039] 5. The subsequent flotation process can be omitted, and no flotation reagents need to be added, which is environmentally friendly.
[0040] 6. In addition, this application has the advantages of simple equipment, high automation degree, good separation effect, short construction period, and fast capital return. Brief Description of the Drawings
[0041] Figure 1 It is a schematic diagram of the overall structure of this application.
[0042] Reference Numerals in the Drawings
[0043] 1 - Crushing and Screening System; 11 - Crusher; 12 - Sizing Screen;
[0044] 2 - Primary Heavy Medium Separation System; 21 - Primary Mixing Tank; 22 - Primary Heavy Medium Cyclone; 23 - Primary No.1 Vibrating Medium Screen; 24 - Primary No.2 Pre - desliming Screen; 25 - Primary Shunt Box; 26 - Primary No.2 Vibrating Medium Screen; 27 - Primary Magnetic Separator; 28 - Primary Thickening Cyclone;
[0045] 3 - Secondary Heavy Medium Separation System; 31 - Secondary Mixing Tank; 32 - Secondary Heavy Medium Cyclone; 33 - Secondary No.1 Vibrating Medium Screen; 34 - Secondary No.2 Pre - desliming Screen; 35 - Secondary No.2 Vibrating Medium Screen; 36 - Secondary Shunt Box; 37 - Secondary Magnetic Separator; 38 - Secondary Thickening Cyclone;
[0046] 4 - Color Sorting System; 41 - Color Sorter;
[0047] 5 - Fine Particle Size Treatment System; 51 - Tertiary Thickening Cyclone; 52 - Thickener; 53 - Dewatering Screen; 54 - Filter Press. Detailed Embodiments
[0048] Hereinafter, this application will be further described based on the preferred embodiments with reference to the drawings.
[0049] In addition, for the convenience of understanding, various components in the drawings are enlarged (thick) or reduced (thin), but this approach is not intended to limit the protection scope of this application.
[0050] Singular - form words also include plural meanings, and vice versa.
[0051] In the description of the embodiments of the present application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of the embodiments of the present application are usually placed during use. It is only for the convenience of describing the present application 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. Therefore, it should not be construed as a limitation to the present application. In addition, in the description of the present application, in order to distinguish different units, terms such as first and second are used in this specification, but these are not restricted by the manufacturing order and should not be construed as indicating or implying relative importance. In the detailed description and claims of the present application, their names may be different.
[0052] The terms used in this specification are for the purpose of describing the embodiments of the present application, but are not intended to limit the present application. It should also be noted that unless otherwise clearly specified and defined, if terms such as "set", "connected", "connected to" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be specifically understood.
[0053] As Figure 1 shown, a collophanite separation system includes a crushing and screening system 1, a first-stage heavy medium separation system 2, a second-stage heavy medium separation system 3, a color sorting system 4, and a fine particle size treatment system 5. The outlet of the crushing and screening system 1 is respectively connected to the inlets of the first-stage heavy medium separation system 2, the second-stage heavy medium separation system 3, and the fine particle size treatment system 5. The outlets of the first-stage heavy medium separation system 2 include a coarse particle concentrate product outlet, a first tailing product outlet, a first-stage thickening underflow product outlet, and a first-stage thickening overflow product outlet. Among them, the coarse particle concentrate product outlet is connected to the inlet of the color sorting system 4, the first-stage thickening underflow product outlet is connected to the inlet of the fine particle size treatment system 5, and the first-stage thickening overflow product outlet is connected to the crushing and screening system 1. The first-stage heavy medium separation system 2 is used to process coarse particle size materials and can effectively remove shale with a light specific gravity. The color sorting system 4 is used to remove dolomite and its associated ores that cannot be removed by the first-stage heavy medium separation system 2, which can significantly improve the concentrate grade.
[0054] The outlet of the secondary heavy medium separation system 3 includes a second concentrate product outlet, a third tailing product outlet, a secondary thickening underflow product outlet, and a first return water outlet. Among them, the secondary thickening underflow product outlet is connected to the inlet of the fine particle size treatment system 5; the secondary heavy medium separation system 3 is used to process intermediate particle size materials, and by taking advantage of the high feed grade and relatively sufficient monomer dissociation degree of phosphorus-containing minerals, qualified grade concentrate products can be directly obtained.
[0055] The outlet of the fine particle size treatment system 5 includes a fine mud product outlet, a fine particle product outlet, and a second return water outlet. The fine particle size material system is used to process fine particle size materials, ensuring the full utilization of return water and reducing the consumption of fresh water.
[0056] Specifically, the crushing and screening system 1 includes a crusher 11 and a sizing screen 12. The outlet of the crusher 11 is connected to the inlet of the sizing screen 12. The outlets of the sizing screen 12 are respectively an a-b particle size product outlet, a b-c particle size product outlet, and a -c particle size product outlet. The a-b particle size product outlet is connected to the inlet of the primary heavy medium separation system 2, the b-c particle size product outlet is connected to the inlet of the secondary heavy medium separation system 3, and the -c particle size product outlet is connected to the inlet of the fine particle size treatment system 5 for separate treatment according to the classified particle size of the materials.
[0057] In some preferred embodiments, the upper limit of the particle size of the crushed product is usually 15.0 - 25.0 mm, the screen hole size of the upper layer screen of the sizing screen 12 is 6.0 mm - 12.0 mm, and the screen hole size of the lower layer screen mesh of the sizing screen 12 is 0.5 mm - 1.0 mm.
[0058] In some preferred embodiments, a, b, and c shown in the figure are used as examples to divide the materials with particle sizes of 20 mm, 10 mm, and 0.5 mm respectively. The crusher 11 crushes the materials into powders with a particle size below 20 mm, and the powders are transported into the sizing screen 12 for wet screening to obtain fine particle size materials (-0.5 mm), intermediate particle size materials (0.5 - 10.0 mm), and coarse particle size materials (10.0 - 20.0 mm). Among them, the coarse particle size materials are fed into the primary heavy medium separation system 2 through the a-b particle size product outlet, the intermediate particle size materials are fed into the secondary heavy medium separation system 3 through the b-c particle size product outlet, and the fine particle size materials are fed into the fine particle size treatment system 5 through the -c particle size product outlet.
[0059] In some preferred embodiments, the primary heavy medium separation system 2 includes a primary mixing tank 21, a primary heavy medium cyclone 22, a first primary vibrating medium sieve 23, a first primary pre-medium sieve 24, a primary shunt box 25, a second primary vibrating medium sieve 26, a primary magnetic separator 27, and a primary thickening cyclone 28. The inlet of the primary mixing tank 21 is connected to the a-b particle size product outlet of the crushing and screening system 1. The outlet of the primary mixing tank 21 is connected to the inlet of the primary heavy medium cyclone 22. The underflow outlet of the primary heavy medium cyclone 22 is connected to the first primary vibrating medium sieve 23. The oversize product outlet of the first primary vibrating medium sieve 23 is the coarse particle concentrate product outlet. The overflow outlet of the primary heavy medium cyclone 22 is connected to the inlet of the first primary pre-medium sieve 24. The oversize outlet of the first primary pre-medium sieve 24 is connected to the inlet of the second primary vibrating medium sieve 26. The oversize product outlet of the second primary vibrating medium sieve 26 is the first tailing product outlet.
[0060] Specifically, a heavy medium suspension with a density of 2.60 g / cm 3 is configured in the primary mixing tank 21. After the coarse particle material is fed into the primary mixing tank 21 of the primary heavy medium separation system 2, the primary mixing tank 21 pumps the coarse particle material and the heavy medium suspension together into the primary heavy medium cyclone 22 for cyclone separation. The feeding pressure of the primary heavy medium cyclone 22 is 0.20 MPa. Among them, the light product with a smaller specific gravity is discharged from the first-stage overflow port of the primary heavy medium cyclone 22 and sequentially enters the first primary pre-medium sieve 24 and the second primary vibrating medium sieve 26. The oversize product of the second primary vibrating medium sieve 26 is the first tailing product. The heavy product with a larger specific gravity is discharged from the sand settling port of the primary heavy medium cyclone 22 and enters the first primary vibrating medium sieve 23. The oversize product of the first primary vibrating medium sieve 23 is the coarse concentrate product.
[0061] In some preferred embodiments, there are two underflow outlets at the underflow outlet of the first primary vibrating medium sieve 23. One of the underflow outlets is connected to the inlet of the primary magnetic separator 27, and the other underflow outlet is connected to the inlet of the primary mixing tank 21 through a first primary shunt pipe. In this way, a part of the undersize product of the first primary vibrating medium sieve 23 enters the primary magnetic separator 27 through the underflow outlet, and the other part enters the primary mixing tank 21 through the first primary shunt pipe.
[0062] In some preferred embodiments, the under-screen outlet of the first-stage No. 2 pre-dense-medium screen 24 is connected to the inlet of the first-stage shunt box 25, or simultaneously connected to the inlets of the first-stage shunt box 25 and the first-stage mixing barrel 21. In this way, a part of the under-screen product of the first-stage No. 2 pre-dense-medium screen 24 enters the first-stage shunt box 25 through the under-screen outlet, and another part enters the first-stage mixing barrel 21 through the first-stage No. 2 shunt pipe.
[0063] Further, the under-screen product outlet of the first-stage No. 2 vibrating dense-medium screen 26 and the dilute medium outlet of the first-stage shunt box 25 are respectively connected to the inlet of the first-stage magnetic separator 27. The concentrate product outlet of the first-stage magnetic separator 27 and the combined medium outlet of the first-stage shunt box 25 are respectively connected to the inlet of the first-stage mixing barrel 21. The tailing product outlet of the first-stage magnetic separator 27 is connected to the inlet of the first-stage thickening cyclone 28. The overflow outlet of the first-stage thickening cyclone 28 is connected to the inlet of the sizing screen 12. The underflow outlet of the first-stage thickening cyclone 28 is connected to the inlet of the fine particle size treatment system 5.
[0064] Specifically, the under-screen product of the first-stage No. 2 pre-dense-medium screen 24 is fed into the first-stage shunt box 25. Part of the suspension separated by the first-stage shunt box 25, the first-stage No. 1 vibrating dense-medium screen 23 and the first-stage No. 2 vibrating dense-medium screen 26 is transported to the first-stage magnetic separator 27 by a pump for purification and refinement. The concentrate product of the first-stage magnetic separator 27 is qualified suspension, and the specific gravity of the concentrate product of the first-stage magnetic separator 27 is ≥2.8 g / cm 3 ³; the tailing product of the first-stage magnetic separator 27 is fed into the first-stage thickening cyclone 28 by a pump. The overflow product of the first-stage thickening cyclone 28 is used as sizing screen water. The underflow product of the first-stage thickening cyclone 28 is fed into the subsequent fine particle size treatment system 5, and the underflow concentration of the first-stage thickening cyclone 28 is above 20%.
[0065] In some preferred embodiments, the combined medium of the first-stage shunt box 25, the concentrate product of the first-stage magnetic separator 27 and part of the suspension separated by the first-stage No. 1 vibrating dense-medium screen 23 are transported into the first-stage mixing barrel 21 by a pump. A heavy medium suspension is configured in the first-stage mixing barrel 21. The transported materials and the heavy medium suspension are fed into the first-stage heavy medium cyclone 22 together by a pump for re-separation.
[0066] In some preferred embodiments, the secondary heavy medium separation system 3 includes a secondary mixing tank 31, a secondary heavy medium cyclone 32, a secondary No. 1 vibrating medium screen 33, a secondary No. 2 pre-medium screen 34, a secondary No. 2 vibrating medium screen 35, a secondary flow splitter box 36, a secondary magnetic separator 37, and a secondary thickening cyclone 38. The inlet of the secondary mixing tank 31 is connected to the b-c particle size product outlet of the crushing and screening system 1. The outlet of the secondary mixing tank 31 is connected to the inlet of the secondary heavy medium cyclone 32. The underflow outlet of the secondary heavy medium cyclone 32 is connected to the secondary No. 1 vibrating medium screen 33. The oversize product outlet of the secondary No. 1 vibrating medium screen 33 is the second concentrate product outlet. The overflow outlet of the secondary heavy medium cyclone 32 is connected to the inlet of the secondary No. 2 pre-medium screen 34. The oversize outlet of the secondary No. 2 pre-medium screen 34 is connected to the inlet of the secondary No. 2 vibrating medium screen 35. The oversize product outlet of the secondary No. 2 vibrating medium screen 35 is the third tailing product outlet.
[0067] Specifically, a heavy medium suspension with a density of 2.40 g / cm 3 is configured in the secondary mixing tank 31. After the intermediate particle size material is fed into the secondary mixing tank 31 of the secondary heavy medium separation system, the secondary mixing tank 31 pumps the intermediate particle size material and the heavy medium suspension together into the secondary heavy medium cyclone 32 for cyclone separation. The feeding pressure of the secondary heavy medium cyclone 32 is 0.20 MPa. Among them, the light product with a smaller specific gravity is discharged from the first-stage overflow port of the secondary heavy medium cyclone 32 and sequentially enters the secondary No. 2 pre-medium screen 34 and the secondary No. 2 vibrating medium screen 35. The oversize product of the secondary No. 2 vibrating medium screen 35 is the third tailing product. The heavy product with a larger specific gravity is discharged from the second-stage sand settling port of the secondary heavy medium cyclone 32 and enters the secondary No. 1 vibrating medium screen 33. The oversize product of the secondary No. 1 vibrating medium screen 33 is the second concentrate product.
[0068] In some preferred embodiments, there are two underflow outlets at the underflow outlet of the secondary No. 1 vibrating medium screen 33. One of the underflow outlets is connected to the inlet of the secondary magnetic separator 37, and the other underflow outlet is connected to the secondary mixing tank 31 through a secondary No. 1 flow splitter pipe. In this way, a part of the undersize product of the secondary No. 1 vibrating medium screen enters the secondary magnetic separator 37 through the underflow outlet, and the other part enters the secondary mixing tank 31 through the secondary No. 1 flow splitter pipe.
[0069] In some preferred embodiments, the under-screen outlet of the second-stage No. 2 pre-dense-medium screen 34 is connected to the inlet of the second-stage shunt box 36, or simultaneously connected to the inlets of the second-stage shunt box 36 and the second-stage mixing barrel 31. In this way, a part of the under-screen product of the second-stage No. 2 pre-dense-medium screen enters the second-stage shunt box 36 through the under-screen outlet, and the other part enters the second-stage mixing barrel 31 through the second-stage No. 2 shunt pipe.
[0070] Further, the under-screen product outlets of the second-stage No. 1 vibrating dense-medium screen 33, the under-screen product outlets of the second-stage No. 2 vibrating dense-medium screen 35, and the dilute-medium outlets of the second-stage shunt box 36 are respectively connected to the inlets of the second-stage magnetic separator 37. The concentrate product outlet of the second-stage magnetic separator 37 and the combined-medium outlet of the second-stage shunt box 36 are connected to the inlet of the second-stage mixing barrel 31. The tailing product outlet of the second-stage magnetic separator 37 is connected to the inlet of the second-stage thickening cyclone 38. The overflow outlet of the second-stage thickening cyclone 38 is the first return water, and the underflow outlet of the second-stage thickening cyclone 38 is connected to the inlet of the fine particle size treatment system 5.
[0071] Specifically, the under-screen product of the second-stage No. 2 pre-dense-medium screen 34 is fed into the second-stage shunt box 36. Part of the suspension separated by the second-stage No. 1 vibrating dense-medium screen 33, the second-stage No. 2 vibrating dense-medium screen 35, and the second-stage shunt box 36 is transported to the second-stage magnetic separator 37 by a pump for purification and refinement. The concentrate product of the second-stage magnetic separator 37 is qualified suspension, and the specific gravity of the concentrate product of the second-stage magnetic separator 37 is ≥2.8 g / cm 3 ; The tailing product of the second-stage magnetic separator 37 is fed into the second-stage thickening cyclone 38 by a pump. The overflow product of the second-stage thickening cyclone 38 is used as the first return water, and the underflow product of the second-stage thickening cyclone 38 is fed into the subsequent fine particle size treatment system 5. The underflow concentration of the second-stage thickening cyclone 38 is above 20%.
[0072] In some preferred embodiments, the under-screen product of the second-stage No. 2 pre-dense-medium screen 34, the combined medium of the second-stage shunt box 36, the concentrate product of the second-stage magnetic separator 37, and part of the suspension separated by the second-stage No. 1 vibrating dense-medium screen 33 are transported into the second-stage mixing barrel 31 by a pump. A heavy medium suspension is configured in the second-stage mixing barrel 31, and the transported materials and the heavy medium suspension are fed into the second-stage heavy medium cyclone 32 together by a pump for re-separation.
[0073] In some preferred embodiments, the color sorting system 4 includes a color sorter 41. The inlet of the color sorter 41 is connected to the coarse concentrate product outlet. The coarse concentrate product generated by the first-stage heavy medium separation system 2 is fed into the color sorter 41 of the color sorting system 4. The outlet of the color sorter 41 obtains the first concentrate product and the second tailing product respectively.
[0074] In some preferred embodiments, the fine particle processing system 5 includes a three-stage thickening cyclone 51, a thickener 52, a dewatering screen 53, and a filter press 54. The inlets of the three-stage thickening cyclone 51 are respectively connected to the -c particle size product outlet of the classification screen 12, the underflow outlet of the first-stage thickening cyclone 28, and the underflow outlet of the second-stage thickening cyclone 38. The overflow outlet of the three-stage thickening cyclone 51 is connected to the thickener 52. The underflow outlet of the three-stage thickening cyclone 51 is connected to the dewatering screen 53. The screen-over product outlet of the dewatering screen 53 is the fine particle product outlet. The screen-under product outlet of the dewatering screen 53 is connected to the inlet of the three-stage thickening cyclone 51. The underflow outlet of the thickener 52 is connected to the inlet of the filter press 54. The overflow outlet of the thickener 52 is the second return water outlet. The filtrate outlet of the filter press 54 is connected to the inlet of the thickener 52. The filter cake outlet of the filter press 54 is the fine mud product outlet.
[0075] Specifically, the fine particle materials of the crushing and screening system 1, the underflow products of the first-stage thickening cyclone 28, and the underflow products of the second-stage thickening cyclone 38 are fed together into the three-stage thickening cyclone 51 of the fine particle processing system 5 for thickening. The feeding pressure of the three-stage thickening cyclone 51 is 0.15 MPa, and the underflow concentration is 60%. The underflow of the three-stage thickening cyclone 51 is fed into the dewatering screen 53. The screen-over of the dewatering screen 53 is the fine particle product, and the moisture content of the fine particle product is 19.50%. The screen-under product of the dewatering screen 53 returns to the three-stage thickening cyclone 51. The overflow of the three-stage thickening cyclone 51 is fed into the thickener 52. The underflow concentration of the thickener 52 is 25%. The underflow of the thickener 52 is transported to the filter press 54 by a pump. The overflow of the thickener 52 is the second return water for recycling. The filtrate of the filter press 54 returns to the thickener 52. The filter cake of the filter press 54 is the fine mud product, and the moisture content of the fine mud product is 20%.
[0076] To further confirm the advantages of this application, this application processed a certain domestic collophanite material and sorted out the separation indexes. Among them, the original ore P2O5 grade of this collophanite material is 17.25%. The main minerals in this phosphate ore are apatite, quartz, dolomite, and feldspar. The specific separation index details are as follows:
[0077] Product Name Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> First Concentrate Product 21.78 26.20 33.08 Second Concentrate Product 24.32 26.31 37.09 Composite Concentrate Product 46.10 26.26 70.17 First Tailings Product 18.17 8.79 9.26 Second Tailings Product 3.05 9.49 1.68 Third Tailings Product 16.95 9.22 9.06 Composite Tailings Product 38.17 9.04 19.99 Fine Particle Product 6.81 17.94 7.08 Slime Product 8.92 5.33 2.76 Total 100.00 17.25 100.00
[0078] As can be seen from the above results, when the ore materials of a domestic collophanite are processed by the utility model, the separation indexes of the comprehensive concentrate product can be obtained as follows: the yield is 46.10%, the grade of P2O5 is 26.26%, and the comprehensive recovery rate is 70.17%; the yield of the comprehensive tailings product is 38.17%, the grade of P2O5 is 9.04%, and the comprehensive loss rate is 19.99%. The grade of the concentrate product reaches the quality standard of qualified phosphate concentrate.
[0079] In summary, when the collophanite separation system is adopted, the coarse and fine-grained ores with different washability are first classified into coarse and fine grades, and then separated by heavy medium separately after classification, ensuring that the ores of each grain size can be processed under the most suitable separation conditions. At the same time, the color sorting system is used to purify the coarse phosphate concentrate, and qualified comprehensive concentrate products can be obtained, effectively improving the recovery rate of the comprehensive concentrate products; the fine-grained material system ensures the full utilization of the recycled water, with great social and economic benefits. In addition, this process also has the advantages of high automation, environmental friendliness, short investment recovery period, etc., and is suitable for subsequent popularization and application.
[0080] The specific implementation manners of the present application have been introduced in detail above. For those skilled in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. A collophanite separation system, characterized in that Including: A crushing and screening system (1), a primary heavy medium separation system (2), a secondary heavy medium separation system (3), a color sorting system (4), and a fine particle size treatment system (5); The outlet of the crushing and screening system (1) is respectively connected to the inlets of the primary heavy medium separation system (2), the secondary heavy medium separation system (3), and the fine particle size treatment system (5); The outlet of the primary heavy medium separation system (2) includes a coarse particle concentrate product outlet, a first tailing product outlet, a primary thickening underflow product outlet, and a primary thickening overflow product outlet. Among them, the coarse particle concentrate product outlet is connected to the inlet of the color sorting system (4), the primary thickening underflow product outlet is connected to the inlet of the fine particle size treatment system (5), and the primary thickening overflow product outlet is connected to the crushing and screening system (1); The outlet of the secondary heavy medium separation system (3) includes a second concentrate product outlet, a third tailing product outlet, a secondary thickening underflow product outlet, and a first return water outlet. Among them, the secondary thickening underflow product outlet is connected to the inlet of the fine particle size treatment system (5); The outlet of the color sorting system (4) includes a first concentrate product outlet and a second tailing product outlet; The outlet of the fine particle size treatment system (5) includes a fine mud product outlet, a fine particle product outlet, and a second return water outlet.
2. The apatite ore separation system according to claim 1, characterized in that: The crushing and screening system (1) includes a crusher (11) and a sizing screen (12). The outlet of the crusher (11) is connected to the inlet of the sizing screen (12). The upper screen oversize product outlet of the sizing screen (12) is the a-b particle size product outlet, the lower screen oversize product outlet of the sizing screen (12) is the b-c particle size product outlet, and the lower screen undersize product outlet of the sizing screen (12) is the -c particle size product outlet. Among them, the a-b particle size product outlet is connected to the inlet of the primary heavy medium separation system (2), the b-c particle size product outlet is connected to the inlet of the secondary heavy medium separation system (3), and the -c particle size product outlet is connected to the inlet of the fine particle size treatment system (5).
3. The apatite ore separation system according to claim 2, characterized in that: The primary heavy medium separation system (2) includes a primary mixing tank (21), a primary heavy medium cyclone (22), a primary No. 1 vibrating desliming screen (23), a primary No. 2 pre-desliming screen (24), a primary No. 2 vibrating desliming screen (26), a primary magnetic separator (27), and a primary thickening cyclone (28). The a-b particle size product outlet of the crushing and screening system (1) is connected to the inlet of the primary mixing tank (21), and the outlet of the primary mixing tank (21) is connected to the inlet of the primary heavy medium cyclone (22); The underflow outlet of the primary heavy medium cyclone (22) is connected to the primary No. 1 vibrating desliming screen (23), and the screen oversize product outlet of the primary No. 1 vibrating desliming screen (23) is the coarse particle concentrate product outlet; The overflow outlet of the first-stage heavy-medium cyclone (22) is connected to the inlet of the first-stage No. 2 pre-dense-medium screen (24). The over-screen outlet of the first-stage No. 2 pre-dense-medium screen (24) is connected to the inlet of the first-stage No. 2 vibrating dense-medium screen (26). The over-screen product outlet of the first-stage No. 2 vibrating dense-medium screen (26) is the first tailing product outlet.
4. The apatite ore separation system according to claim 3, wherein: There are two under-screen outlets of the first-stage No. 1 vibrating dense-medium screen (23). One of the under-screen outlets is connected to the inlet of the first-stage magnetic separator (27), and the other under-screen outlet is connected to the inlet of the first-stage mixing tank (21) through a first-stage No. 1 shunt pipe. The first-stage heavy-medium separation system (2) further includes a first-stage shunt box (25). The under-screen outlet of the first-stage No. 2 pre-dense-medium screen (24) is connected to the inlet of the first-stage shunt box (25), or is simultaneously connected to the inlets of the first-stage shunt box (25) and the first-stage mixing tank (21).
5. The apatite ore separation system according to claim 4, wherein: The under-screen product outlet of the first-stage No. 2 vibrating dense-medium screen (26) and the dilute medium outlet of the first-stage shunt box (25) are respectively connected to the inlet of the first-stage magnetic separator (27). The concentrate product outlet of the first-stage magnetic separator (27) and the combined medium outlet of the first-stage shunt box (25) are respectively connected to the inlet of the first-stage mixing tank (21). The tailing product outlet of the first-stage magnetic separator (27) is connected to the inlet of the first-stage thickening cyclone (28). The overflow outlet of the first-stage thickening cyclone (28) is connected to the inlet of the sizing screen (12). The underflow outlet of the first-stage thickening cyclone (28) is connected to the inlet of the fine particle size treatment system (5).
6. The apatite ore separation system according to claim 3, wherein: The second-stage heavy-medium separation system (3) includes a second-stage mixing tank (31), a second-stage heavy-medium cyclone (32), a second-stage No. 1 vibrating dense-medium screen (33), a second-stage No. 2 pre-dense-medium screen (34), a second-stage No. 2 vibrating dense-medium screen (35), a second-stage magnetic separator (37), and a second-stage thickening cyclone (38). The inlet of the second-stage mixing tank (31) is connected to the b-c particle size product outlet of the crushing and screening system (1). The outlet of the second-stage mixing tank (31) is connected to the inlet of the second-stage heavy-medium cyclone (32). The underflow outlet of the second-stage heavy-medium cyclone (32) is connected to the second-stage No. 1 vibrating dense-medium screen (33). The over-screen product outlet of the second-stage No. 1 vibrating dense-medium screen (33) is the second concentrate product outlet. The overflow outlet of the second-stage heavy-medium cyclone (32) is connected to the inlet of the second-stage No. 2 pre-dense-medium screen (34). The over-screen outlet of the second-stage No. 2 pre-dense-medium screen (34) is connected to the inlet of the second-stage No. 2 vibrating dense-medium screen (35). The over-screen product outlet of the second-stage No. 2 vibrating dense-medium screen (35) is the third tailing product outlet.
7. The apatite ore separation system according to claim 6, wherein: The under-screen outlet of the described secondary No. 1 vibrating medium-separating screen (33) has two, one of which is connected to the inlet of the secondary magnetic separator (37), and the other is connected to the secondary mixing tank (31) through the secondary No. 1 shunt pipe; The secondary dense-medium separation system (3) further includes a secondary shunt box (36). The under-screen outlet of the described secondary No. 2 pre-medium-separating screen (34) is connected to the inlet of the secondary shunt box (36), or is simultaneously connected to the inlets of the secondary shunt box (36) and the secondary mixing tank (31).
8. The apatite separation system according to claim 7, characterized in that: The under-screen product outlet of the secondary No. 1 vibrating medium-separating screen (33), the under-screen product outlet of the secondary No. 2 vibrating medium-separating screen (35), and the dilute medium outlet of the secondary shunt box (36) are respectively connected to the inlet of the secondary magnetic separator (37); The concentrate product outlet of the secondary magnetic separator (37) and the combined medium outlet of the secondary shunt box (36) are connected to the inlet of the secondary mixing tank (31); The tailings product outlet of the secondary magnetic separator (37) is connected to the inlet of the secondary thickening cyclone (38). The overflow outlet of the secondary thickening cyclone (38) is the first return water, and the underflow outlet of the secondary thickening cyclone (38) is connected to the inlet of the fine particle treatment system (5).
9. The apatite separation system according to claim 8, characterized in that: The fine particle treatment system (5) includes a tertiary thickening cyclone (51), a thickener (52), a dewatering screen (53), and a filter press (54); The -c particle size product outlet of the sizing screen (12), the underflow outlet of the primary thickening cyclone (28), and the underflow outlet of the secondary thickening cyclone (38) are respectively connected to the inlet of the tertiary thickening cyclone (51). The overflow outlet of the tertiary thickening cyclone (51) is connected to the thickener (52). The underflow outlet of the tertiary thickening cyclone (51) is connected to the dewatering screen (53). The over-screen product outlet of the dewatering screen (53) is the fine particle product outlet; The under-screen product outlet of the dewatering screen (53) is connected to the inlet of the tertiary thickening cyclone (51). The underflow outlet of the thickener (52) is connected to the inlet of the filter press (54). The overflow outlet of the thickener (52) is the second return water outlet. The filtrate outlet of the filter press (54) is connected to the inlet of the thickener (52). The filter cake outlet of the filter press (54) is the fine mud product outlet.
10. The apatite separation system according to claim 2, characterized in that: The screen hole size of the upper layer screen of the sizing screen (12) is 6.0 mm - 12.0 mm, and the screen hole size of the lower layer screen of the sizing screen (12) is 0.5 mm - 1.0 mm.