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WO2016023500A1 - Séparateur magnétique d'air sec - Google Patents

Séparateur magnétique d'air sec Download PDF

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Publication number
WO2016023500A1
WO2016023500A1 PCT/CN2015/086825 CN2015086825W WO2016023500A1 WO 2016023500 A1 WO2016023500 A1 WO 2016023500A1 CN 2015086825 W CN2015086825 W CN 2015086825W WO 2016023500 A1 WO2016023500 A1 WO 2016023500A1
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WIPO (PCT)
Prior art keywords
magnetic
magnetic separator
casing
roller
separator according
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Ceased
Application number
PCT/CN2015/086825
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English (en)
Chinese (zh)
Inventor
张珂
张进才
胡沿东
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Individual
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Individual
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Publication of WO2016023500A1 publication Critical patent/WO2016023500A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for

Definitions

  • the invention relates to a magnetic separator, in particular to a dry wind magnetic separator, which is mainly used in the field of magnetite magnetic separation.
  • China's iron ore resources have two characteristics: First, there are many poor ore, about 80% of mineral resources, and second, there are many symbiotic composite ores. Smelting enterprises reduce costs and save energy consumption. More concentrate powder is used, that is, the original ore is crushed, ground, magnetically selected, flotation and other procedures to remove gangue minerals, and iron fine powder with iron grade higher than 60% is selected for smelting.
  • wet magnetic separator for wet magnetic separation
  • wet magnetic separation will consume water resources, processing 1 to 1.5 tons of water per ton of raw ore, need to build tailings dam, and discharge sewage contaminated land.
  • water sources in the western water-deficient, water-free areas can not be used for mineral processing.
  • a dry magnetic separator is generally used. As shown in FIG. 1 and FIG. 2, the material containing the mineral powder to be selected is injected into the feed port 11 of the vibration feed tank, and the rotary sleeve 10 is fixed around The magnetic shaft 9 rotates.
  • the magnetic shaft 9 is mounted with a plurality of sets of magnetic blocks 12, the magnetic component formed on the surface of the rotating sleeve 10 adsorbs the magnetic components in the material, and when the rotating sleeve 10 rotates, when the adsorbed magnetic components leave After the magnetic block 12, when the surface magnetic field of the rotary sleeve 10 is weakened or disappears, the magnetic component is separated from the rotary sleeve 10 and discharged from the rear discharge port 6, thereby achieving the purpose of magnetic separation.
  • the rotating sleeve rotates for one week, the effective adsorption working time of the magnetic material is short, the number of inversions on the magnetic roller is small, the magnetic wrapping and magnetic agglomeration are serious, and it is difficult to achieve magnetic separation.
  • the selected iron ore grade is low and the selection ratio is low.
  • the present invention provides a dry wind magnetic separator comprising a housing having a feed opening and a discharge opening, wherein the housing is provided with a non-full magnetic magnetic roller, and the housing is provided with a suction
  • the air outlet is opposite to the magnetic field of the magnetic roller.
  • the invention combines the wind and the magnetic force to solve the magnetic wrapping and the magnetic agglomeration with a very short distance, which is beneficial to the separation of the magnetic material and the non-magnetic material, and improves the grade and the selection ratio of the selected iron ore.
  • the present invention does not require water, no water pollution; and the dust is collected without air pollution.
  • the feed port is located at the top of the housing, and the discharge port is located at the bottom of the housing.
  • the discharge port is divided into a ferromagnetic outlet and a non-ferromagnetic outlet, and the selected magnetic material and non- The magnetic material is discharged from the ferromagnetic outlet and the non-ferromagnetic outlet, respectively.
  • the processing capacity of the magnetic separator is improved while satisfying the sorting grade and the selection ratio.
  • the lower portion of the housing is provided with a plenum.
  • a partitioning guide plate is disposed on the casing below the magnetic roller.
  • the plurality of magnetic rollers are plural, and the plurality of magnetic rollers are longitudinally arranged with each other.
  • the mineral can be subjected to multiple magnetic separations, which improves the processing capacity of the beneficiation and improves the selected iron ore grade.
  • the longitudinally arranged magnetic rollers may be arranged in a horizontally offset manner from top to bottom, or may be vertically arranged, or may be arranged in a horizontally offset manner and then vertically.
  • a guide baffle is disposed between the adjacent two magnetic rollers.
  • the guide baffle can collect the non-magnetic material or magnetic material selected in the upper stage and perform the next magnetic separation again.
  • a scraper plate is disposed in the axial direction of the magnetic roller.
  • the scraper plate allows the magnetic material on the magnetic roller to be effectively peeled off when it is transferred into the non-magnetic region.
  • the invention can effectively improve the selected iron ore grade, especially for fine-grain low-grade ore with a particle diameter of less than 120 mesh and -200 mesh, 70% to 85%, and the fine powder taste can reach 67% or more.
  • the selection ratio of the present invention is high, and the ratio of the original ore of 20% to 28% of the grade is up to (2.7 to 3):1.
  • the invention does not require water, no water pollution
  • the invention is dust-free operation, and the dust emission is less than 30 mg/m 3 , which is superior to the requirement of the particulate matter of the national standard “Integrated Emission Standard of Air Pollutants” of less than 150 mg/m 3 , and no air pollution.
  • the processing amount of the present invention is large, such as a CXJ1024 (105*200 cm) magnetic separator, and the processing amount is greater than 60 t/h.
  • FIG. 1 is a schematic structural view of a conventional magnetic separator
  • FIG. 2 is a schematic cross-sectional view showing a magnetic roller of a conventional magnetic separator
  • Figure 3 is a schematic view showing the structure of the first and second embodiments of the present invention.
  • Figure 4 is a schematic structural view of a third embodiment of the present invention.
  • Figure 5 is a schematic view showing the structure of a fourth embodiment of the present invention.
  • Example 1 The magnetite in a certain area of Xinjiang is located in the desert without water, the raw ore is coarsely broken, mediumly crushed and pre-selected with 26 ⁇ 28% of the original ore with integrated grade, and then treated by grinding to a particle size of less than 120 mesh, and - 200 mesh to 70% to 85% of the fine material is fed to the dry magnetic separator of the present invention (as shown in FIG. 3), and the dry magnetic separator includes a shell with a feed port 11 and a discharge port 6, 7.
  • the housing 1 is provided with a magnetic roller 2 which is not fully magnetized, and the housing 1 is provided with an air outlet 4 which is opposite to the magnetic area of the magnetic roller 2, and the magnetic field of the magnetic roller forms a negative pressure. After the material enters from the feed port 11, the magnetic substance is adsorbed on the rotating magnetic roller 2, and the non-magnetic substance falls under the action of gravity.
  • the selected iron ore grade is 67%, the selection ratio can reach 2.7:1, and the dust emission is less than 30 mg/m 3 .
  • Embodiment 2 The magnetic separator shown in FIG. 3 includes a casing 1 having a feed port 11 and a discharge port 6, 7 in which a non-fully magnetic magnetic roller 2 is disposed, the casing
  • the body 1 is provided with an air outlet 4 which is opposed to the magnetic zone of the magnet roller 2.
  • the feed port 11 is provided at the top of the casing 1, and the discharge ports 6, 7 are provided at the bottom of the casing 1.
  • a plenum 5 is provided in the lower portion of the casing 1.
  • the ferromagnetic material After the material enters from the feed port 11, the ferromagnetic material is adsorbed onto the rotating magnetic roller 2. When the magnetic roller 2 is turned to the non-magnetic region, the ferromagnetic material falls by gravity to the ferromagnetic outlet at the bottom of the shell. 6. The non-ferromagnetic material falls into the non-ferromagnetic material outlet 7 by gravity, and the air supply port 5 increases the effective contact of the magnetic roller 2 with the material and increases the magnetization time.
  • the selected iron ore grade is 68%, the selection ratio can reach 3:1, and the dust emission is less than 30 mg/m 3 .
  • the processing capacity of CXJ1024 (105*200cm specification) reached 60t/h.
  • Embodiment 3 a magnetic separator as shown in FIG. 4, comprising a housing 6, 7 having a feed port 11 and a discharge port, wherein the housing 1 is provided with a magnetic roller 2 which is not fully magnetized, the housing An air vent 4 is provided on the first side, and the air vent 4 is opposed to the magnetic zone of the magnetic roller 2.
  • the feed port 11 is located at the top of the housing 1, and the discharge ports 6, 7 are located at the bottom of the housing 1.
  • the magnetic roller 2 is three, three magnetic rollers 2 are longitudinally disposed, and are arranged in a staggered manner in the horizontal direction.
  • the housing 1 below the magnetic roller 2 is provided with a partitioning guide plate 3, adjacent to two A guide flap 13 is provided on the housing between the magnet rollers 2.
  • a plenum 5 is provided in the lower portion of the casing 1.
  • the magnetic substance After the material enters the casing 1 and is magnetically selected by the first magnetic roller 2, the magnetic substance is transferred into the non-magnetic region, and falls into the ferromagnetic outlet 6 under the action of gravity, and the non-magnetic substance is in the guiding baffle 13 and the separating guide plate 3. Under the guidance, it falls again on the magnetic zone of the second magnet roller 2, performs a second magnetic separation, and repeats the above steps for the third magnetic separation, finally obtaining ferromagnetic and non-ferromagnetic materials.
  • the selected magnetic material has a grade of 70%, a selection ratio of 2.8:1, and a dust emission of less than 30 mg/m 3 .
  • the throughput of CXJ1024 (105*200cm specification) reached 65t/h.
  • Embodiment 4 The magnetic separator shown in FIG. 5 includes a casing 1 with a feed port 11 and a discharge port 6, 7 in which a magnetic roller 2 which is not fully magnetized is disposed.
  • the body 1 is provided with an air outlet 4 which is opposed to the magnetic zone of the magnet roller 2.
  • the feed port 11 is located at the top of the housing 1, and the discharge ports 6, 7 are located at the bottom of the housing 1.
  • the magnetic roller 2 is two, the two magnetic rollers 2 are arranged along the same vertical line, and the partitioning guide plate 3 is disposed on the casing 1 below the magnetic roller 2, and the adjacent two magnetic rollers are disposed.
  • a guide flap 13 is provided on the housing 1 between the two.
  • a plenum 5 is provided in the lower portion of the casing 1.
  • the ferromagnetic material After the material enters the casing 1 and is magnetically selected by the first magnetic roller 2, the ferromagnetic material is transferred into the non-magnetic region and then separated from the magnetic roller 2, and the second magnetic separation is performed under the guidance of the guiding baffle 13 and the separating guide plate 3. The non-magnetic material falls into the non-ferromagnetic outlet 7 by the action of gravity.
  • the selected magnetic material has a grade of 71%, a selection ratio of 2.9:1, and a dust emission of less than 30 gm/m 3 .
  • the throughput of CXJ1024 (105*200cm specification) reached 68t/h.
  • the magnetic separator shown in FIG. 4 and FIG. 5 includes a housing 1 with a feed port 11 and a discharge port 6, 7 in which a non-fully magnetic magnetic roller 2 is disposed.
  • An air vent 4 is provided on the first side, and the air vent 4 is opposed to the magnetic zone of the magnetic roller 2.
  • the feed port 11 is located at the top of the housing 1, and the discharge ports 6, 7 are located at the bottom of the housing 1.
  • the magnetic roller 2 has five, the five magnetic rollers 2 are longitudinally arranged from top to bottom, the upper three are staggered in the same direction in the horizontal direction, and the lower two are vertically arranged, and the shell below the magnetic roller 2
  • the body 1 is provided with a partitioning guide plate 3, and a guide baffle 13 is provided on the casing between the adjacent two magnet rollers 2. Further, a scraper plate 8 is provided on the magnet roller 2. And a plenum 5 is provided at the bottom of the casing 1.
  • the material is magnetically selected after passing through three longitudinally disposed magnetic rollers 2 which are staggered in the same horizontal direction, and then magnetically aligned by two magnetic rollers 2 arranged along the same vertical line.
  • a plurality of different magnetites are subjected to a sorting test, and the ore grade is 4 to 10%, 10 to 20%, and 20 to 30%, and the dry magnetic separator CXJ1024 of the present embodiment is fed ( 105*200cm specification), the particle size is 0 ⁇ 0.125, 0 ⁇ 0.15, 0 ⁇ 0.2mm, the iron grade of iron fine powder is 73%, the ratio is (2.7 ⁇ 3.0):1, and the dust emission is less than 30mg/m. 3 , the processing volume is greater than 70t / h.

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  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un séparateur magnétique d'air, comprenant une coque (1) ayant une entrée d'alimentation (11) et des orifices d'évacuation (6, 7). Un rouleau magnétique non-plein (2) est prévu à l'intérieur de la coque (1), un orifice de ventilation d'air (4) est prévu sur la coque (1), et l'orifice de ventilation d'air (4) est opposé à une région magnétique du rouleau magnétique (2). Le séparateur magnétique d'air sec permet d'améliorer efficacement la qualité d'un minerai de fer sélectionné, en particulier pour un minerai brut à grain fin de qualité inférieure dont les particules ayant une taille de moins de 120 mesh à 200 mesh représentent de 70 % à 85 %, il a une classification de poudre fine qui n'est pas inférieure à 67 %, un rapport de concentration élevé et une bonne capacité de traitement, et il est exempt de pollution.
PCT/CN2015/086825 2014-08-15 2015-08-13 Séparateur magnétique d'air sec Ceased WO2016023500A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201420460848.8U CN204018012U (zh) 2014-08-15 2014-08-15 一种干式风磁选机
CN201420460848.8 2014-08-15

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WO2016023500A1 true WO2016023500A1 (fr) 2016-02-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108787162A (zh) * 2018-06-20 2018-11-13 江阴市尚时环境工程有限公司 一种模块化干式磁选机
CN112676034A (zh) * 2020-12-16 2021-04-20 杭超 一种磁选装置及由其构成的移动式磁选机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204018012U (zh) * 2014-08-15 2014-12-17 张珂 一种干式风磁选机
CN104128260A (zh) * 2014-08-15 2014-11-05 张珂 一种干式风磁选机
CN106269160B (zh) * 2016-08-26 2018-09-21 山西立恒钢铁集团股份有限公司 一种具有除铁功能的粉体加工系统
CN112657674A (zh) * 2020-11-23 2021-04-16 江苏华宏科技股份有限公司 报废汽车拆解尾料中不锈钢干法分选装置
CN112705359A (zh) * 2020-12-28 2021-04-27 江苏龙城铸造机械科技有限公司 一种三级磁风选分离器
CN113182070B (zh) * 2021-05-13 2022-09-30 盐城工学院 一种新型干式风磁联合磁选机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948766A (en) * 1972-06-27 1976-04-06 Heinrich Spodig Magnetic separator
JP2001029839A (ja) * 1999-07-26 2001-02-06 Ootsuka Tec:Kk ドライ研削用磁気分離装置
CN101612609A (zh) * 2008-06-27 2009-12-30 上海宝田新型建材有限公司 干法风选强永磁磁选机
CN202199419U (zh) * 2011-06-24 2012-04-25 马鞍山起劲磁塑科技有限公司 永磁粉矿干式磁选机
CN202778707U (zh) * 2012-09-21 2013-03-13 汤铁 变磁场干式磁选机
CN104128260A (zh) * 2014-08-15 2014-11-05 张珂 一种干式风磁选机
CN204018012U (zh) * 2014-08-15 2014-12-17 张珂 一种干式风磁选机

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948766A (en) * 1972-06-27 1976-04-06 Heinrich Spodig Magnetic separator
JP2001029839A (ja) * 1999-07-26 2001-02-06 Ootsuka Tec:Kk ドライ研削用磁気分離装置
CN101612609A (zh) * 2008-06-27 2009-12-30 上海宝田新型建材有限公司 干法风选强永磁磁选机
CN202199419U (zh) * 2011-06-24 2012-04-25 马鞍山起劲磁塑科技有限公司 永磁粉矿干式磁选机
CN202778707U (zh) * 2012-09-21 2013-03-13 汤铁 变磁场干式磁选机
CN104128260A (zh) * 2014-08-15 2014-11-05 张珂 一种干式风磁选机
CN204018012U (zh) * 2014-08-15 2014-12-17 张珂 一种干式风磁选机

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108787162A (zh) * 2018-06-20 2018-11-13 江阴市尚时环境工程有限公司 一种模块化干式磁选机
CN108787162B (zh) * 2018-06-20 2023-12-05 江阴市尚时工程装备有限公司 一种模块化干式磁选机
CN112676034A (zh) * 2020-12-16 2021-04-20 杭超 一种磁选装置及由其构成的移动式磁选机

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