Spiral sorting machine and teetered bed sorting machine combined sorting system
Through the joint sorting system of the spiral sorting machine and the interfering bed sorting machine, combined with the multi-stage cyclone and screening equipment, the problem of insufficient bubble carrying of the middle-section coarse coal sludge during the flotation process is solved, efficient sorting is achieved, and high-quality products are obtained.
Patent Information
- Application Number
- CN202422491488.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-15
AI Technical Summary
In the prior art, coarse coal slime with a middle-particle size range (0.3mm~3mm) is inadequate bubble carrying capacity during flotation, resulting in low sorting efficiency, which is easy to lose in tailings, and cannot be effectively sorted.
The combined sorting system of spiral sorting machine and interfering bed sorting machine is adopted, combining the high-density sorting accuracy of the spiral sorting machine and the low-density sorting accuracy of the interfering bed sorting machine, and multiple cycles are performed through multi-stage cyclones and screening equipment to achieve efficient sorting of the middle-segment coarse coal sludge.
Efficient sorting of coarse coal slime with the middle-section particle size range (0.3mm~3mm) was achieved, and three products were obtained: low-ash coarse fine coal slime, low-ash coarse tail medium coal and high-ash spiral gangue, which improved the sorting efficiency and reduced the loss in tailings.
Smart Images
Figure CN223288220U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coarse coal slime separation, in particular to a combined separation system of a spiral separator and an interference bed separator. Background Art
[0002] With the development of society and the improvement of people's quality of life, the clean utilization of coal has become increasingly important. Coal washing and processing is the source of clean coal utilization, and innovation in coal washing and processing equipment and processes has made great progress. In recent years, coal preparation technology has made breakthroughs. Dense medium coal preparation technology has solved the problem of efficient separation of coarse coal slime, and flotation has solved the problem of efficient separation of fine coal.
[0003] Coarse coal slime generally refers to the portion of coal slime with a particle size between those effectively processed by gravity separation and flotation. Coarse coal slime processing systems are divided into coarse coal slime recovery systems and coarse coal slime sorting systems. Coarse coal slime recovery systems deslim and dewater the coarse coal slime to produce a coarse coal slime product. However, this coarse coal slime product has a high ash content. If blended with clean coal, the clean coal product will not meet quality standards. If blended with middling coal, the middling coal will have an excessively low ash content, leading to clean coal losses. To address the shortcomings of coarse coal slime recovery systems, coarse coal slime sorting systems, due to their low ash content, are gradually gaining attention.
[0004] Existing coarse coal slime sorting systems still have certain issues. When the diameter of a dense medium cyclone exceeds 750mm, the sorting accuracy for materials with a particle size of less than 3mm is poor. The flotation machine's sorting particle size range is <0.5mm, but in production, it often has better sorting results for materials <0.3mm. At this time, coarse coal slime in the middle particle size range (0.3mm-3mm) is easily lost in the tailings during the flotation process due to insufficient bubble carrying capacity. Therefore, there is a gap in the effective sorting particle size between gravity separation and flotation. That is, the sorting efficiency of gravity separation decreases as the particle size decreases, while the sorting efficiency of flotation gradually decreases as the particle size increases. As a result, the sorting efficiency of coal particles near the intersection of the effective sorting ranges of gravity separation and flotation is the lowest. Utility Model Content
[0005] In response to the problems in the prior art, the utility model provides a combined sorting system of a spiral separator and an interference bed separator that can jointly sort coarse coal slime, thereby solving the problem in the prior art that coarse coal slime in the middle particle size range (0.3mm~3mm) is easily lost in the tailings during the flotation process due to insufficient bubble carrying capacity.
[0006] The technical solutions adopted in this utility model are as follows:
[0007] A combined sorting system of a spiral separator and an interference bed separator comprises a classifying cyclone, the feed port of the classifying cyclone being used for feeding coarse coal slime, the first outlet of the classifying cyclone being used for connecting to a flotation system, the second outlet of the classifying cyclone being connected to the feed port of the spiral separator, the first outlet of the spiral separator being used for connecting to a gangue collection unit, the second outlet of the spiral separator being connected to the feed port of the interference bed separator, the first outlet of the interference bed separator being used for connecting to a medium coal collection unit, and the second outlet of the interference bed separator being used for connecting to a clean coal collection unit. By setting up the spiral separator and the interference bed separator, the advantages of the high density sorting accuracy of the spiral separator and the high low density sorting accuracy of the interference bed separator can be utilized to realize the pre-discharge of gangue from the interference bed separator, and obtain three products: low-ash coarse clean coal slime, low-ash coarse tailing medium coal and high-ash spiral gangue. This solves the problem in the existing technology that coarse coal slime in the middle particle size range (0.3mm~3mm) is easily lost in the tailings during the flotation process due to insufficient bubble carrying capacity.
[0008] Preferably, the first outlet of the spiral separator is connected to the feed inlet of the second concentrating cyclone, the first outlet of the second concentrating cyclone is connected to the concentrating system, the second outlet of the second concentrating cyclone is connected to the feed inlet of the first high-frequency screen, the first outlet of the first high-frequency screen is connected to the feed inlet of the second concentrating cyclone, and the second outlet of the first high-frequency screen is connected to the gangue collection unit. By setting up the second concentrating cyclone and the first high-frequency screen, a portion of the sorted mixed material can be fed into the second concentrating cyclone for cyclic sorting.
[0009] Preferably, a first concentrating cyclone is further provided between the second outlet of the spiral separator and the interference bed separator, the second outlet of the spiral separator is connected to the feed inlet of the first concentrating cyclone, the first outlet of the first concentrating cyclone is connected to the feed inlet of the second concentrating cyclone, and the second outlet of the first concentrating cyclone is connected to the feed inlet of the interference bed separator. This further implements cyclic pre-discharge of waste rock for the feed to the interference bed separator.
[0010] Preferably, a second high-frequency screen and a first centrifuge are sequentially arranged between the first outlet of the interference bed separator and the medium coal collection unit, the first outlet of the interference bed separator is connected to the feed port of the second high-frequency screen, the first outlet of the second high-frequency screen is connected to the feed port of the second concentrating cyclone, the second outlet of the second high-frequency screen is connected to the feed port of the first centrifuge, the first outlet of the first centrifuge is connected to the feed port of the second concentrating cyclone, and the second outlet of the first centrifuge is used to connect to the medium coal collection unit.
[0011] Preferably, the second outlet of the interference bed separator is connected to the third concentrating cyclone, the first outlet of the third concentrating cyclone is used to connect to the flotation system, and the second outlet of the third concentrating cyclone is used to connect to the clean coal collection unit.
[0012] Preferably, a laminated screen and a second centrifuge are sequentially arranged between the second outlet of the third concentrating cyclone and the clean coal collection unit, the second outlet of the third concentrating cyclone is connected to the feed port of the laminated screen, the first outlet of the laminated screen is connected to the feed port of the second concentrating cyclone, the second outlet of the laminated screen is connected to the feed port of the second centrifuge, the first outlet of the second centrifuge is used to connect to the flotation system, and the second outlet of the second centrifuge is used to connect to the clean coal collection unit.
[0013] The above technical solution shows that the advantages of the present invention are as follows: by providing a spiral separator and an interference bed separator, the advantages of the high-density sorting accuracy of the spiral separator and the high-density sorting accuracy of the interference bed separator can be utilized to achieve pre-discharge of gangue from the interference bed separator feed, thereby obtaining three products: low-ash coarse clean coal slime, low-ash coarse tailings medium coal, and high-ash spiral gangue. This solves the problem in the prior art that coarse coal slime in the middle particle size range (0.3mm~3mm) is easily lost in the tailings during the flotation process due to insufficient bubble carrying capacity. By providing a second concentrating cyclone and a first high-frequency screen, part of the sorted mixed material can be fed into the second concentrating cyclone for cyclic sorting. This further achieves cyclic pre-discharge of gangue from the feed to the interference bed separator. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0015] Figure 1 It is a flowchart of a specific embodiment of the present invention.
[0016] exist Figure 1 In Chinese: “+” represents underflow, centrifuge filter cake, spiral separator heavy product, and high-frequency (laminated) screen large particle product; “-” represents overflow, centrifuge centrate, spiral separator light product, and high-frequency (laminated) screen small particle product. DETAILED DESCRIPTION
[0017] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.
[0018] Example:
[0019] like Figure 1 As shown, a combined sorting system of a spiral separator and an interference bed separator comprises a classifying cyclone, the feed port of the classifying cyclone is used to feed coarse coal slime, the first outlet of the classifying cyclone is used to connect to the flotation system, the second outlet of the classifying cyclone is connected to the feed port of the spiral separator, the first outlet of the spiral separator is used to connect to the gangue collection unit, the second outlet of the spiral separator is connected to the feed port of the interference bed separator, the first outlet of the interference bed separator is used to connect to the medium coal collection unit, and the second outlet of the interference bed separator is used to connect to the medium coal collection unit. The invention is connected to the clean coal collection unit. With such an arrangement, the spiral separator and the interference bed separator can utilize the advantages of the high-density sorting precision of the spiral separator and the high-density sorting precision of the interference bed separator to realize the pre-discharge of gangue from the feeding of the interference bed separator, and obtain three products: low-ash coarse clean coal slime, low-ash coarse tailing medium coal and high-ash spiral gangue. This solves the problem in the prior art that coarse coal slime in the middle particle size range (0.3mm~3mm) is easily lost in the tailings during the flotation process due to insufficient bubble carrying capacity.
[0020] In this embodiment, the first outlet of the spiral separator is connected to the feed port of the second concentrating cyclone, the first outlet of the second concentrating cyclone is used to connect to the concentrating system, the second outlet of the second concentrating cyclone is connected to the feed port of the first high-frequency screen, the first outlet of the first high-frequency screen is connected to the feed port of the second concentrating cyclone, and the second discharge port of the first high-frequency screen is used to connect to the gangue collection unit. In this arrangement, through the second concentrating cyclone and the first high-frequency screen, part of the sorted mixed material can be put into the second concentrating cyclone for cyclic sorting.
[0021] In this embodiment, a first concentrating cyclone is further provided between the second outlet of the spiral separator and the interference bed separator. The second outlet of the spiral separator is connected to the feed port of the first concentrating cyclone, the first outlet of the first concentrating cyclone is connected to the feed port of the second concentrating cyclone, and the second outlet of the first concentrating cyclone is connected to the feed port of the interference bed separator. This arrangement further realizes the cyclic pre-discharge of gangue from the feed of the interference bed separator.
[0022] In this embodiment, a second high-frequency screen and a first centrifuge are sequentially arranged between the first outlet of the interference bed separator and the medium coal collection unit. The first outlet of the interference bed separator is connected to the feed port of the second high-frequency screen, the first outlet of the second high-frequency screen is connected to the feed port of the second concentrating cyclone, the second outlet of the second high-frequency screen is connected to the feed port of the first centrifuge, the first outlet of the first centrifuge is connected to the feed port of the second concentrating cyclone, and the second outlet of the first centrifuge is used to connect to the medium coal collection unit.
[0023] In this embodiment, the second outlet of the interference bed separator is connected to the third concentrating cyclone, the first outlet of the third concentrating cyclone is used to connect to the flotation system, and the second outlet of the third concentrating cyclone is used to connect to the clean coal collection unit.
[0024] In this embodiment, a laminated screen and a second centrifuge are sequentially arranged between the second outlet of the third concentrating cyclone and the clean coal collection unit. The second outlet of the third concentrating cyclone is connected to the feed port of the laminated screen, the first outlet of the laminated screen is connected to the feed port of the second concentrating cyclone, the second outlet of the laminated screen is connected to the feed port of the second centrifuge, the first outlet of the second centrifuge is used to connect to the flotation system, and the second outlet of the second centrifuge is used to connect to the clean coal collection unit.
[0025] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A combined separation system of a spiral separator and an interference bed separator, comprising a classifying cyclone, wherein the feed port of the classifying cyclone is used to feed coarse coal slime, characterized in that: The first outlet of the grading cyclone is used to connect to the flotation system, the second outlet of the grading cyclone is connected to the feed port of the spiral separator, the first outlet of the spiral separator is used to connect to the gangue collection unit, the second outlet of the spiral separator is connected to the feed port of the interference bed separator, the first outlet of the interference bed separator is used to connect to the medium coal collection unit, and the second outlet of the interference bed separator is used to connect to the clean coal collection unit.
2. The combined separation system of spiral separator and interference bed separator according to claim 1 is characterized in that: The first outlet of the spiral separator is connected to the feed port of the second concentrating cyclone, the first outlet of the second concentrating cyclone is used to connect to the concentrating system, the second outlet of the second concentrating cyclone is connected to the feed port of the first high-frequency screen, the first outlet of the first high-frequency screen is connected to the feed port of the second concentrating cyclone, and the second outlet of the first high-frequency screen is used to connect to the gangue collection unit.
3. The combined separation system of spiral separator and interference bed separator according to claim 2 is characterized in that: A first concentrating cyclone is also provided between the second outlet of the spiral separator and the interference bed separator. The second outlet of the spiral separator is connected to the feed port of the first concentrating cyclone. The first outlet of the first concentrating cyclone is connected to the feed port of the second concentrating cyclone. The second outlet of the first concentrating cyclone is connected to the feed port of the interference bed separator.
4. The combined sorting system of spiral separator and interference bed separator according to any one of claims 2 or 3, characterized in that: A second high-frequency screen and a first centrifuge are sequentially arranged between the first outlet of the interference bed separator and the medium coal collection unit. The first outlet of the interference bed separator is connected to the feed port of the second high-frequency screen, the first outlet of the second high-frequency screen is connected to the feed port of the second concentrating cyclone, the second outlet of the second high-frequency screen is connected to the feed port of the first centrifuge, the first outlet of the first centrifuge is connected to the feed port of the second concentrating cyclone, and the second outlet of the first centrifuge is used to connect to the medium coal collection unit.
5. The combined separation system of spiral separator and interference bed separator according to claim 4 is characterized in that: The second outlet of the interference bed separator is connected to the third concentrating cyclone, the first outlet of the third concentrating cyclone is used to connect to the flotation system, and the second outlet of the third concentrating cyclone is used to connect to the clean coal collection unit.
6. The combined separation system of spiral separator and interference bed separator according to claim 5, characterized in that: A laminated screen and a second centrifuge are sequentially arranged between the second outlet of the third concentrating cyclone and the clean coal collection unit. The second outlet of the third concentrating cyclone is connected to the feed port of the laminated screen, the first outlet of the laminated screen is connected to the feed port of the second concentrating cyclone, the second outlet of the laminated screen is connected to the feed port of the second centrifuge, the first outlet of the second centrifuge is used to connect to the flotation system, and the second outlet of the second centrifuge is used to connect to the clean coal collection unit.