Hematite separation system
By designing a hematite sorting system including material preparation system, heavy media sorting system and fine-grained material treatment system, the problems of complex processes, low sorting efficiency and high production costs in the existing technology are solved, and efficient and low-cost hematite sorting effect is achieved.
Patent Information
- Application Number
- CN202421739453.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The existing hematite sorting methods have problems such as complex process, low sorting efficiency, high production costs and low final concentrate quality.
A hematite sorting system including a material preparation system, a heavy media sorting system and a fine-grained material treatment system were designed. The system is composed of crushing, dry magnetic separation, grading screen, mixing barrel, heavy medium cyclone, vibration demediation screen, magnetic separator and other equipment, and realizes the sorting of coarse and fine-grained materials and the refining of concentrates.
The system simplifies the process, improves sorting efficiency, improves sorting process, improves the quality of the final concentrate, and reduces production costs.
Smart Images
Figure CN222872397U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hematite separation, in particular to a hematite separation system. Background Art
[0002] As we all know, the chemical composition of hematite is Fe 2 O 3 , an oxide mineral belonging to the hexagonal crystal system, is a weakly magnetic iron ore. The color is reddish brown, steel gray to iron black, and the streak is cherry red. Metallic to semi-metallic luster. Mohs hardness is 5.5-6.5, and the specific gravity is 4.9-5.3. It is widely used in ironmaking, steelmaking, building materials, chemical raw materials, medicine and other fields.
[0003] At present, the main methods for separating hematite are: 1) Flotation: mainly used for the separation of fine and ultrafine hematite, including positive flotation (anionic collector) and reverse flotation (cationic collector); 2) Magnetic separation: since hematite is a weakly magnetic mineral, it can be recovered by strong magnetic separation; 3) Gravity separation: mainly divided into coarse-gravity separation and fine-gravity separation. Coarse-gravity separation often uses jigging equipment, and fine-grained gravity separation often uses centrifugal concentrators, spiral chutes and other equipment; 4) Roasting magnetic separation: when the mineral composition is relatively complex and other beneficiation methods are difficult to obtain good separation indicators, roasting magnetic separation is often used to separate hematite.
[0004] Flotation is a commonly used separation method. It requires multiple rounds of separation to obtain qualified hematite concentrate, and the foam is easy to adhere and the product is difficult to concentrate and filter. Magnetic separation is mostly used to process magnetite-hematite mixed ore. A weak magnetic separation process is added before the strong magnetic separation process to remove or separate strongly magnetic minerals, making it difficult to obtain qualified hematite concentrate. In the gravity separation method, the coarse particle gravity separation equipment and jigging equipment are suitable for coarse particle tailings and restoration of geological grade, and the fine particle gravity separation equipment is mainly suitable for the separation of fine particle materials. The roasting magnetic separation method requires the ore to be magnetized and roasted to convert the hematite into magnetite, and then separated with a weak magnetic separator. This method has a high production cost. Summary of the invention
[0005] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and provide a hematite sorting system which simplifies the process, improves the sorting efficiency, improves the sorting process, improves the final concentrate quality and reduces the production cost.
[0006] The technical solution adopted by the utility model to solve its technical problems is:
[0007] A hematite sorting system, characterized in that the system comprises a material preparation system, a heavy medium sorting system and a fine-grained material processing system, the material preparation system's discharge ports are respectively a coarse-grained product outlet, a fine-grained product outlet and a magnetic product outlet, the products at the magnetic product outlet are magnetic products, the coarse-grained product outlet is connected to an inlet of a heavy medium sorting system, the fine-grained product outlet is connected to an inlet of a fine-grained material processing system, the heavy medium sorting system's outlets are respectively a concentrate product outlet, a first tailings product outlet, a second tailings product outlet and a concentrated product outlet, the products at the concentrate product outlet, the first tailings product outlet and the second tailings product outlet are respectively a concentrate product, a first tailings product and a second tailings product, the concentrated product outlet is connected to the inlet of the fine-grained material processing system, the fine-grained material processing system's outlets are a fine mud product outlet, a fine particle product outlet and a return water outlet, the products at the fine mud product outlet and the fine particle product outlet are respectively a fine mud product and a fine particle product.
[0008] The material preparation system described in the utility model comprises a crusher, a dry magnetic separator and a grading screen. The outlet of the crusher is connected to the inlet of the dry magnetic separator, the magnetic product outlet of the dry magnetic separator is a magnetic product, the non-magnetic product outlet of the dry magnetic separator is connected to the inlet of the grading screen, the on-screen product outlet of the grading screen is a coarse-grained product outlet, and the under-screen product outlet of the grading screen is a fine-grained product outlet.
[0009] The heavy medium separation system described in the utility model comprises a mixing barrel, a heavy medium cyclone, a first vibrating de-mediating screen, a second vibrating de-mediating screen, a third vibrating de-mediating screen, a first pre-de-mediating screen, a second pre-de-mediating screen, a diverter box, a magnetic separator, a demagnetizer, and a primary concentrating cyclone. The inlet of the mixing barrel is connected to the coarse particle product outlet of the material preparation system, the outlet of the mixing barrel is connected to the inlet of the heavy medium cyclone, a first overflow outlet of the heavy medium cyclone is connected to the inlet of the first pre-de-mediating screen, the screen outlet of the first pre-de-mediating screen is connected to the inlet of the first vibrating de-mediating screen, the screen product outlet of the first vibrating de-mediating screen is the first tailings product outlet, the screen product outlet of the first pre-de-mediating screen is connected to the inlet of the diverter box, the second overflow outlet of the heavy medium cyclone is connected to the inlet of the second pre-de-mediating screen, the screen outlet of the second pre-disconnected screen is connected to the second vibrating de-mediating screen, and the screen outlet of the first vibrating de-mediating screen is the first tailings product outlet. The inlet of the de-media screen is connected, the on-screen product outlet of the second vibrating de-media screen is the second tailings product outlet, the second-stage sand settling port of the heavy medium cyclone is connected to the inlet of the third vibrating de-media screen, the on-screen product outlet of the third de-media screen is the concentrate product outlet, the under-screen product outlet of the third vibrating de-media screen, the under-screen product outlet of the second vibrating de-media screen, the dilute medium outlet of the diverter box, and the under-screen product outlet of the first vibrating de-media screen are respectively connected to the inlet of the magnetic separator, the concentrate product outlet of the magnetic separator is connected to the inlet of the demagnetizer, the outlet of the demagnetizer, the combined medium outlet of the diverter box, and the under-screen outlet of the second pre-de-media screen are respectively connected to the inlet of the mixing barrel, the tailings product outlet of the magnetic separator is connected to the inlet of the first-level concentrating cyclone, the overflow outlet of the first-level concentrating cyclone is connected to the inlet of the grading screen, and the underflow outlet of the first-level concentrating cyclone is connected to the inlet of the fine-grained material handling system.
[0010] The fine-grained material processing system of the utility model comprises a secondary concentrating cyclone, a thickener, a dewatering screen and a filter press. The inlet of the secondary concentrating cyclone is respectively connected with the under-screen product outlet of the grading screen and the underflow outlet of the primary concentrating cyclone, the overflow outlet of the secondary concentrating cyclone is connected with the thickener, the underflow outlet of the secondary concentrating cyclone is connected with the dewatering screen, the over-screen product outlet of the dewatering screen is a fine-grained product outlet, the under-screen product outlet of the dewatering screen is connected with the inlet of the secondary concentrating cyclone, the underflow outlet of the thickener is connected with the inlet of the filter press, the overflow outlet of the thickener and the filtrate outlet of the filter press are return water outlets, and the filter cake outlet of the filter press is a fine mud product outlet.
[0011] The third vibrating de-mediating screen described in the utility model is provided with two under-sieve outlets, one of which is connected to the inlet of the magnetic separator, and the other is connected to the mixing barrel via a primary diverter pipe, so that part of the under-sieve product of the third vibrating de-mediating screen enters the magnetic separator via the under-sieve outlet, and the other part enters the mixing barrel via the primary diverter pipe.
[0012] The upper limit of the particle size of the crushed product of the crusher described in the utility model is 3-10mm.
[0013] The size of the sieve holes of the grading sieve described in the utility model is 0.5-1.0 mm.
[0014] The heavy medium cyclone described in the utility model is a pressurized three-product heavy medium cyclone. The cone angle of the first cylinder in the pressurized three-product heavy medium cyclone is 0-15°, and the cone angle of the second cylinder is 20-30°.
[0015] The first pre-de-mediation screen described in the utility model has two under-screen outlets, one of which is connected to the inlet of the diverter box, and the other is connected to the mixing barrel via a secondary diverter pipe, so that part of the under-screen product of the first pre-de-mediation screen enters the diverter box via the under-screen outlet, and the other part enters the mixing barrel via the secondary diverter pipe.
[0016] The utility model adopts the structure, has the advantages of simplifying the process, improving the sorting efficiency, improving the sorting technology, improving the final concentrate quality, reducing the production cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0018] The utility model is further described below in conjunction with the accompanying drawings:
[0019] As shown in the accompanying drawings, a hematite sorting system is characterized in that the system includes a material preparation system 1, a heavy medium sorting system 2 and a fine-grained material processing system 3, the discharge ports of the material preparation system 1 are respectively a coarse-grained product outlet, a fine-grained product outlet and a magnetic product outlet, the products of the magnetic product outlet are magnetic products, the coarse-grained product outlet is connected to the inlet of the heavy medium sorting system 2, the fine-grained product outlet is connected to the inlet of the fine-grained material processing system 3, the outlets of the heavy medium sorting system 2 are respectively a concentrate product outlet, a first tailings product outlet, a second tailings product outlet, and a concentrated product outlet, the products of the concentrate product outlet, the first tailings product outlet, and the second tailings product outlet are respectively a concentrate product, a first tailings product, and a second tailings product, the concentrated product outlet is connected to the inlet of the fine-grained material processing system 3, the outlets of the fine-grained material processing system 3 are a fine mud product outlet, a fine particle product outlet and a return water outlet, and the products of the fine mud product outlet and the fine particle product outlet are respectively a fine mud product and a fine particle product.
[0020] Furthermore, the material preparation system 1 includes a crusher 11, a dry magnetic separator 12, and a grading screen 13. The outlet of the crusher 11 is connected to the inlet of the dry magnetic separator 12, the magnetic product outlet of the dry magnetic separator 12 is a magnetic product, the non-magnetic product outlet of the dry magnetic separator 12 is connected to the inlet of the grading screen 13, the on-screen product outlet of the grading screen 13 is a coarse-grained product outlet, and the under-screen product outlet of the grading screen 13 is a fine-grained product outlet.
[0021] Furthermore, the heavy medium separation system 2 includes a mixing barrel 21, a heavy medium cyclone 22, a first vibrating de-medium screen 23, a second vibrating de-medium screen 24, a third vibrating de-medium screen 25, a first pre-de-medium screen 26, a second pre-de-medium screen 27, a diverter box 28, a magnetic separator 29, a demagnetizer 210, and a primary concentrating cyclone 211. The inlet of the mixing barrel 21 is connected to the coarse particle product outlet of the material preparation system 1, and the outlet of the mixing barrel 21 is connected to the inlet of the heavy medium cyclone 22. The first overflow outlet of the heavy medium cyclone 22 is connected to the inlet of the first pre-medium-removing screen 26, the upper screen outlet of the first pre-medium-removing screen 26 is connected to the inlet of the first vibrating de-medium-removing screen 23, the upper screen product outlet of the first vibrating de-medium-removing screen 23 is the first tailings product outlet, the lower screen product outlet of the first pre-medium-removing screen 26 is connected to the inlet of the diverter box 28, the second overflow outlet of the heavy medium cyclone 22 is connected to the inlet of the second pre-medium-removing screen 27, the upper screen outlet of the second pre-disconnecting screen is connected to the inlet of the second ... The inlet of the vibrating de-medium screen 24 is connected, the screen product outlet of the second vibrating de-medium screen 24 is the second tailings product outlet, the second stage sand settling port of the heavy medium cyclone 22 is connected to the inlet of the third vibrating de-medium screen 25, the screen product outlet of the third de-medium screen is the concentrate product outlet, the under-screen product outlet of the third vibrating de-medium screen 25, the under-screen product outlet of the second vibrating de-medium screen 24, the dilute outlet of the diverter box 28, and the under-screen product outlet of the first vibrating de-medium screen 23 are respectively connected to the inlet of the magnetic separator 29 The concentrate product outlet of the magnetic separator 29 is connected to the inlet of the demagnetizer 210, the outlet of the demagnetizer 210, the combined medium outlet of the diverter box 28, and the under-screen outlet of the second pre-de-screen 27 are respectively connected to the inlet of the mixing barrel 21, the tailings product outlet of the magnetic separator 29 is connected to the inlet of the first-level concentrating cyclone 211, the overflow outlet of the first-level concentrating cyclone 211 is connected to the inlet of the grading screen 13, and the underflow outlet of the first-level concentrating cyclone 211 is connected to the inlet of the fine-grained material processing system 3.
[0022] Furthermore, the fine-grained material processing system 3 includes a secondary concentrating cyclone 31, a thickener 32, a dewatering screen 33, and a filter press 34. The inlet of the secondary concentrating cyclone 31 is respectively connected to the undersize product outlet of the grading screen 13 and the underflow outlet of the primary concentrating cyclone 211, the overflow outlet of the secondary concentrating cyclone 31 is connected to the thickener 32, the underflow outlet of the secondary concentrating cyclone 31 is connected to the dewatering screen 33, the oversize product outlet of the dewatering screen 33 is a fine particle product outlet, the undersize product outlet of the dewatering screen 33 is connected to the inlet of the secondary concentrating cyclone 31, the underflow outlet of the thickener 32 is connected to the inlet of the filter press 34, the overflow outlet of the thickener 32 and the filtrate outlet of the filter press 34 are return water outlets, and the filter cake outlet of the filter press 34 is a fine mud product outlet.
[0023] Furthermore, the third vibrating de-mediating screen 25 is provided with two under-sieve outlets, one of which is connected to the inlet of the magnetic separator 29, and the other is connected to the mixing barrel 21 via a primary diverter pipe 212, so that part of the under-sieve product of the third vibrating de-mediating screen 25 enters the magnetic separator 29 via the under-sieve outlet, and the other part enters the mixing barrel via the primary diverter pipe 212.
[0024] Furthermore, the upper limit of the particle size of the crushed product of the crusher 11 is 3-10 mm.
[0025] Furthermore, the mesh size of the grading screen 13 is 0.5-1.0 mm.
[0026] Furthermore, the heavy medium cyclone 22 is a pressurized three-product heavy medium cyclone 22, and the cone angle of the first cylinder of the pressurized three-product heavy medium cyclone 22 is 0-15°, and the cone angle of the second cylinder is 20-30°.
[0027] Furthermore, the first pre-de-mediation screen 26 is provided with two under-sieve outlets, one of which is connected to the inlet of the diverter box 28, and the other is connected to the mixing barrel 21 via a secondary diverter pipe, so that part of the under-sieve product of the first pre-de-mediation screen 26 enters the diverter box 28 through the under-sieve outlet, and the other part enters the mixing barrel 21 through the secondary diverter pipe.
[0028] In the actual working conditions, the separation field strength of the dry magnetic separator 12 is 100-600mT, the feed pressure of the three-product heavy medium cyclone 22 is 0.10-0.30MPa, and the specific gravity of the suspension is 1.8-2.8g / cm 3 ; The specific gravity of the concentrate product of the magnetic separator 29 in the heavy medium separation system 2 is ≥2.8g / cm 3The underflow concentration of the first-stage concentrating cyclone 211 is above 20%, and the feed pressure of the second-stage concentrating cyclone 31 is 0.06-0.20MPa; the underflow concentration of the second-stage concentrating cyclone 31 is above 55%; the moisture content of the obtained fine particle product is less than 20%, and the underflow concentration of the thickener 32 is not less than 20%; the moisture content of the obtained fine mud product is less than 22%.
[0029] Compared with the existing mineral processing system, the beneficial effects of the utility model are: ① It can directly produce qualified concentrates with good sorting effect; ② No harmful agents need to be added, and the return water can be directly used, which is environmentally friendly; ③ The degree of automation is high and the sorting process is easy to control; ④ The process flow is simple and easy to manage; ⑤ The investment recovery period is short, the investment is effective quickly, and the project has strong profitability. It has the advantages of simplifying the process, improving the sorting efficiency, improving the sorting process, improving the final concentrate quality, and reducing production costs. Example
[0030] The sorting process using the hematite sorting system is as follows: the material is fed into the crusher 11 of the material preparation system 1 and crushed to -8.00mm; the powder is fed into the dry magnetic separator 12 with a sorting magnetic field of 400mT to obtain magnetic products and non-magnetic products; the non-magnetic products are transported to the grading screen 13 for wet screening to remove the -1.0mm material, and the 1.0-8.0mm coarse-grained material is fed into the heavy medium sorting system 2, and the -1.0mm fine-grained material is fed into the fine-grained material processing system 3.
[0031] The mixing barrel 21 is provided with a density of 2.40 g / cm 3 The heavy medium suspension is pumped together with the coarse-grained material and the heavy medium suspension into a pressurized three-product heavy medium cyclone for separation. The feed pressure of the heavy medium cyclone is 0.20 MPa, the cone angle of the first stage cylinder is 10°, and the cone angle of the second stage cylinder is 20°; the light product with small specific gravity is discharged from the first overflow port of the heavy medium cyclone 22, and enters the first pre-de-medium screen 26 and the first vibrating de-medium screen 23 in sequence. The product on the first vibrating de-medium screen 23 is the first tailings product; the intermediate product with intermediate specific gravity is discharged from the second overflow port of the heavy medium cyclone 22, and enters the second pre-de-medium screen 27 and the first vibrating de-medium screen 23 in sequence. The second vibrating de-medium screen 24, the screen product of the second vibrating de-medium screen 24 is the second tailings product; the heavy product with high specific gravity is discharged from the second stage sand settling port of the heavy medium cyclone 22 into the third vibrating de-medium screen 25, and the screen product of the third vibrating de-medium screen 25 is the concentrate product; part of the suspension separated by the first vibrating de-medium screen 23, the second vibrating de-medium screen 24, the third vibrating de-medium screen 25 and the diverter box 28 is transported to the magnetic separator 29 through a pump for purification; the concentrate product of the magnetic separator 29 is a qualified suspension after being treated by the demagnetizer 210, and the specific gravity of the concentrate product of the magnetic separator 29 is ≥2.8g / cm 3The tailings product of the magnetic separator 29 is fed into the primary concentrating cyclone 211 through a pump, the overflow product of the primary concentrating cyclone 211 is used as water for the grading screen 13, and the underflow product of the primary concentrating cyclone 211 is fed into the subsequent fine-grained material processing system 3, and the underflow concentration of the primary concentrating cyclone 211 is above 20%.
[0032] The fine-grained product of the material preparation system and the underflow product of the first-level concentrating cyclone 211 of the heavy medium separation system 2 are transported to the second-level concentrating cyclone 31 through a pump. The feed pressure of the second-level concentrating cyclone 31 is 0.12 MPa, and the underflow concentration is 60%. The underflow of the second-level concentrating cyclone 31 is fed to the dewatering screen 33. The fine particle product on the dewatering screen 33 has a moisture content of 19%. The product below the dewatering screen 33 is returned to the concentrating cyclone; the overflow of the second-level concentrating cyclone 31 is fed to the thickener 32, and the underflow concentration of the thickener 32 is 30%. The underflow of the thickener 32 is transported to the filter press 34 through a pump. The overflow of the thickener 32 and the filtrate of the filter press 34 are returned water and recycled. The filter cake of the filter press 34 is a fine mud product with a moisture content of 20%.
[0033] For a foreign hematite ore material, the original ore TFe grade is 39.62%, SiO 2 The grade is 31.29%. The useful minerals are mainly hematite, containing some magnetite. The sorting indicators obtained by using this hematite sorting system are shown in the following table.
[0034]
[0035] It can be seen from the above data that the hematite separation system is used to process a foreign hematite material, and the separation indicators of the concentrate product yield of 32.81%, TFe grade of 62.58%, and comprehensive recovery rate of 51.82% can be obtained, and the comprehensive yield of magnetic products is 12.30%, TFe grade of 37.61%, and comprehensive recovery rate of 11.67%. The concentrate product (TFe grade> 62%, SiO2 grade<8%) reaches the quality standard of qualified iron concentrate (H62 grade).
[0036] In summary, by adopting the hematite separation system, the material preparation system can separate the strong magnetic minerals, eliminate their influence on the heavy medium separation system 2, and provide qualified raw materials for the heavy medium separation system 2; the heavy medium separation system 2 can directly produce qualified concentrate products, while ensuring the recovery rate of the concentrate products; the fine-grained material processing system 3 ensures full utilization of the return water, and has great social and economic benefits. In addition, the system also has the advantages of low operating cost, high degree of automation, and environmental friendliness, and is suitable for subsequent promotion and application.
Claims
1. A hematite separation system, characterized in that The system comprises a material preparation system, a heavy medium separation system and a fine-grained material processing system. The material preparation system has discharge ports for a coarse-grained product, a fine-grained product and a magnetic product respectively. The magnetic product outlet is a magnetic product. The coarse-grained product outlet is connected to an inlet of a heavy medium separation system. The fine-grained product outlet is connected to an inlet of a fine-grained material processing system. The heavy medium separation system has outlets for a concentrate product, a first tailings product, a second tailings product and a concentrated product. The concentrate product, the first tailings product and the second tailings product are concentrate products, first tailings products and second tailings products respectively. The concentrated product outlet is connected to an inlet of a fine-grained material processing system. The fine-grained material processing system has outlets for a fine mud product, a fine particle product and a return water outlet. The fine mud product and the fine particle product outlets are fine mud products and fine particle products respectively.
2. A hematite separation system according to claim 1, characterized in that The material preparation system includes a crusher, a dry magnetic separator, and a grading screen. The outlet of the crusher is connected to the inlet of the dry magnetic separator. The magnetic product outlet of the dry magnetic separator is a magnetic product. The non-magnetic product outlet of the dry magnetic separator is connected to the inlet of the grading screen. The on-screen product outlet of the grading screen is a coarse-grained product outlet, and the under-screen product outlet of the grading screen is a fine-grained product outlet.
3. A hematite separation system according to claim 1, characterized in that The heavy medium separation system comprises a mixing barrel, a heavy medium cyclone, a first vibrating de-mediating screen, a second vibrating de-mediating screen, a third vibrating de-mediating screen, a first pre-de-mediating screen, a second pre-de-mediating screen, a diverter box, a magnetic separator, a demagnetizer, and a primary concentrating cyclone. The inlet of the mixing barrel is connected to the coarse particle product outlet of the material preparation system, the outlet of the mixing barrel is connected to the inlet of the heavy medium cyclone, a first overflow outlet of the heavy medium cyclone is connected to the inlet of the first pre-de-mediating screen, the screen outlet of the first pre-de-mediating screen is connected to the inlet of the first vibrating de-mediating screen, the screen product outlet of the first vibrating de-mediating screen is the first tailings product outlet, the screen product outlet of the first pre-de-mediating screen is connected to the inlet of the diverter box, the second overflow outlet of the heavy medium cyclone is connected to the inlet of the second pre-de-mediating screen, the screen outlet of the second pre-disconnected screen is connected to the second vibrating de-mediating screen The inlet of the screen is connected, the on-screen product outlet of the second vibrating de-media screen is the second tailings product outlet, the second-stage sand settling port of the heavy medium cyclone is connected to the inlet of the third vibrating de-media screen, the on-screen product outlet of the third de-media screen is the concentrate product outlet, the under-screen product outlet of the third vibrating de-media screen, the under-screen product outlet of the second vibrating de-media screen, the dilute medium outlet of the diverter box, and the under-screen product outlet of the first vibrating de-media screen are respectively connected to the inlet of the magnetic separator, the concentrate product outlet of the magnetic separator is connected to the inlet of the demagnetizer, the outlet of the demagnetizer, the combined medium outlet of the diverter box, and the under-screen outlet of the second pre-de-media screen are respectively connected to the inlet of the mixing barrel, the tailings product outlet of the magnetic separator is connected to the inlet of the first-level concentrating cyclone, the overflow outlet of the first-level concentrating cyclone is connected to the inlet of the grading screen, and the underflow outlet of the first-level concentrating cyclone is connected to the inlet of the fine-grained material handling system.
4. A hematite separation system according to claim 1, characterized in that The fine-grained material processing system comprises a secondary concentrating cyclone, a thickener, a dewatering screen, and a filter press. The inlet of the secondary concentrating cyclone is respectively connected to the undersize product outlet of the grading screen and the underflow outlet of the primary concentrating cyclone, the overflow outlet of the secondary concentrating cyclone is connected to the thickener, the underflow outlet of the secondary concentrating cyclone is connected to the dewatering screen, the oversize product outlet of the dewatering screen is a fine particle product outlet, the undersize product outlet of the dewatering screen is connected to the inlet of the secondary concentrating cyclone, the underflow outlet of the thickener is connected to the inlet of the filter press, the overflow outlet of the thickener and the filtrate outlet of the filter press are return water outlets, and the filter cake outlet of the filter press is a fine mud product outlet.
5. A hematite separation system according to claim 3, characterized in that The third vibrating de-mediating screen has two under-sieve outlets, one of which is connected to the inlet of the magnetic separator, and the other is connected to the mixing barrel via a primary diverter pipe, so that part of the under-sieve product of the third vibrating de-mediating screen enters the magnetic separator via the under-sieve outlet, and the other part enters the mixing barrel via the primary diverter pipe.
6. A hematite separation system according to claim 2, characterized in that The upper limit of the particle size of the crushed product of the crusher is 3-10mm.
7. A hematite separation system according to claim 2, characterized in that The mesh size of the grading sieve is 0.5-1.0 mm.
8. A hematite separation system according to claim 3, characterized in that The heavy medium cyclone is a pressurized three-product heavy medium cyclone. The cone angle of the first cylinder of the pressurized three-product heavy medium cyclone is 0-15°, and the cone angle of the second cylinder is 20-30°.
9. A hematite separation system according to claim 3, characterized in that The first pre-de-mediation screen is provided with two undersize outlets, one of which is connected to the inlet of the diverter box, and the other is connected to the mixing barrel via a secondary diverter pipe, so that part of the undersize product of the first pre-de-mediation screen enters the diverter box via the undersize outlet, and the other part enters the mixing barrel via the secondary diverter pipe.