WO2015109962A1 - 提精降渣磁选机 - Google Patents

提精降渣磁选机 Download PDF

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Publication number
WO2015109962A1
WO2015109962A1 PCT/CN2015/070589 CN2015070589W WO2015109962A1 WO 2015109962 A1 WO2015109962 A1 WO 2015109962A1 CN 2015070589 W CN2015070589 W CN 2015070589W WO 2015109962 A1 WO2015109962 A1 WO 2015109962A1
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Prior art keywords
magnetic
permanent magnet
tank body
ore
tank
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PCT/CN2015/070589
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English (en)
French (fr)
Inventor
王顺
王兆连
刘风亮
李玉永
张良满
赵毅
Original Assignee
山东华特磁电科技股份有限公司
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Application filed by 山东华特磁电科技股份有限公司 filed Critical 山东华特磁电科技股份有限公司
Priority to AU2015208562A priority Critical patent/AU2015208562B2/en
Priority to RU2016116818A priority patent/RU2651739C2/ru
Priority to EP15739991.6A priority patent/EP3097980B1/en
Priority to BR112016008350-4A priority patent/BR112016008350B1/pt
Priority to US15/026,124 priority patent/US9833791B2/en
Publication of WO2015109962A1 publication Critical patent/WO2015109962A1/zh

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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
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/14—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets
    • B03C1/145—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets with rotating annular or disc-shaped material carriers
    • 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
    • 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
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0332—Component parts; Auxiliary operations characterised by the magnetic circuit using permanent magnets
    • 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
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/034—Component parts; Auxiliary operations characterised by the magnetic circuit characterised by the matrix elements
    • 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
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • 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
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/14—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets
    • 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
    • B03C1/23—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp
    • 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
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid

Definitions

  • the invention relates to the technical field of beneficiation equipment, in particular to a refining and slag magnetic separator.
  • the selected concentrated magnetic separator is a magnetic separation device developed to improve the grade and concentration of concentrates with the progress of mineral processing technology in recent years. Its working principle is realized by the action of magnetic force and mechanical force on the ore particles.
  • the sortable minerals include various types of magnetite, hematite, limonite, manganese ore.
  • the selective concentration sorting equipment commonly used by various concentrators is mainly some magnetic heavy equipment, such as de-sludge tanks or electromagnetic panning magnetic separators, but the disadvantages of such equipment are: First, the volume is large.
  • the structure is complicated and the installation is inconvenient; Second, the water consumption is large; Third, the control system is complicated, the ore dressing index is unstable; Fourth, the required ore concentration is low, and the processing capacity of the equipment station is low. The shortage of existing equipment severely restricts the production efficiency and economic benefits of the concentrator.
  • the technical problem to be solved by the invention is to provide a refined slag-reducing magnetic separator for replacing the existing selective concentrating equipment, and the refined slag-reducing magnetic separator can significantly improve the grade of the product and sort the selected ones. Concentrate concentration is high.
  • a slag-removing magnetic separator comprising a tank fixedly disposed on a frame, wherein the tank body is rotated and provided with a permanent magnet drum driven by a power device, wherein the permanent magnet drum is provided with respect to the groove a body-fixed magnetic system, the inlet side of the trough body is connected to a feeding tank, the wrap angle of the magnetic system ranges from 200° to 280°, and the magnetic system is a multi-pole structure, and the magnetic system is close to the
  • the area on the ore side of the trough body is a magnetic system selection area, and the magnetic system selection area is located above the slurry surface in the tank; the upstream position in the tank corresponds to the magnetic system selection area
  • a plurality of rinsing water pipes are disposed, and the plurality of rinsing water pipes are disposed on an outer side of the permanent magnet roller and located above a slurry surface of the tank body, and each of the rinsing water pipes is spaced apart from the plurality of
  • a plurality of the rinsing water pipes are arranged concentrically with the permanent magnet roller.
  • the feeding ore box is a tubular feeding box
  • the tubular feeding box comprises a tube body closed at both ends of the tank inlet side, and the top of the tube body is provided with at least a feeding port, the bottom of the pipe body is provided with a mining slit, the extending direction of the mining hole is consistent with the axial direction of the permanent magnet roller; corresponding to the outlet at the feeding port
  • the width of the ore slit is narrower than or equal to the width of the remaining portion of the tapping slit.
  • the magnetic separator is provided with two layers of discharge scrapers on the upper and lower sides of the unloading side.
  • the refined slag-reducing magnetic separator of the invention adopts a large-angle magnetic system of 200°-280° to lengthen the selection area of the magnetic separator and the mineral conveying area, and the multi-magnetic pole structure adopted by the magnetic system
  • the increase in the number of mineral magnetic tumbling is not only conducive to improving the grade of the concentrate, but also the separation of minerals and water in the long process of ore mining, achieving the concentration of minerals; due to the selection of magnetic fields and permanent magnet rollers Arranging a plurality of rinsing water pipes in the center of the heart, so that the minerals are rinsed and concentrated in the longer magnetic system selection area after being separated from the slurry surface, and the sorting effect is significantly improved compared with the conventional selection machine;
  • the area and the rinsing water pipes are all higher than the slurry surface.
  • the nozzles on the adjacent rinsing water pipes are staggered to make the rinsing more thorough without leaving a dead angle; a plurality of strip-shaped magnetic conductive sheets are disposed on the inner wall, and a magnetic shield is continuously formed between the magnetic conductive sheets and the magnetic poles during the rotation of the permanent magnet drums.
  • an agitating magnetic field is generated on the surface of the permanent magnet roller, and the mineral continuously generates a state of agglomeration, dispersion, and re-agglomeration during the sorting process, and is supplemented with a rinsing water sprayed by a plurality of rinsing water pipes, so that impurities in the mineral can be obtained. Adequate separation, which further enhances the concentrate grade.
  • the tapping slit provided at the bottom of the pipe body in the same direction as the axis of the permanent magnet roller can ensure that the slurry entering the magnetic separator is evenly distributed in the axial direction of the drum, thereby facilitating beneficiation, It is beneficial to improve the final selected concentrate grade; when the width of the ore-slending slit corresponding to the ore supply is narrower than the width of the remaining part of the ore-slit slit, it is convenient to adjust the slurry outflow speed of different sections to make the whole out The pulp outflow velocity in the length of the mine slit tends to be uniform, which is conducive to the uniformity of the beneficiation.
  • the refined slag-reducing magnetic separator of the present invention comprehensively adopts the above various measures, can significantly improve the grade of the product, and the concentration of the concentrate is high; and the structure is compact, the volume is small, and the time of the equipment is The processing capacity is large, the production efficiency is high, and the economic benefit of the concentrator is improved.
  • FIG. 1 is a schematic structural view of a refined slag-reducing magnetic separator of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 3 is a schematic view showing the structure of a tank body of the refined slag-reducing magnetic separator of the present invention.
  • Figure 4 is a schematic view of a tubular feed box of the refined slag magnetic separator of the present invention.
  • Figure 5 is a structural schematic view of the tapping slit of the tubular feed tank of Figure 4 (bottom view of Figure 4);
  • Figure 6 is a schematic view showing another structure of the tapping slit of the tubular feeding tank of Figure 4.
  • Figure 7 is a schematic view showing the structure of a permanent magnet roller of the refined slag-reducing magnetic separator of the present invention.
  • Figure 8 is an enlarged schematic view showing the position of the magnetic conductive sheet of the permanent magnet drum
  • Figure 9 is an enlarged schematic view of a portion A, a portion B, and a portion C of Figure 8;
  • 1-magnetic system adjustment device 2-frame; 3-permanent magnet roller; 4-power device; 5-flushing device; 6-slot body; 7-magnetic system selection area; 8-magnetic system; 9-tailing outlet; 10-level discharge scraper; 11-second discharge scraper; 12-concentrate collecting box; 13-feeding port; 14-overflow plate; 15--rinsing pipe; - sprinkler; 16-tube feed bin; 17a-mining slit; 17b-mining slit; 18-bearing; 19-cylinder; 20-spindle; 21-slewing bearing; 22-transmission gear; - Magnetically conductive sheet.
  • the refined slag-removing magnetic separator comprises a downstream flow tank 6 fixedly disposed on the frame 2, and a concentrate is arranged on the tapping side of the tank body 6.
  • the collecting box 12 is provided with a tailings outlet 9 at the bottom of the tank body 6; a permanent magnet roller 3 driven by the power unit 4 is disposed in the tank body 6, and the lower half of the permanent magnet drum 3 is located in the tank body 6.
  • the power unit 4 for driving the rotation of the permanent magnet roller 3 is a conventional technique in the art.
  • the main shaft 20 in the permanent magnet drum 3 is supported on a support base 18, and the power unit 4 includes an electric motor and a gearbox, and a gearbox.
  • the output end is mounted with a gear that meshes with a transmission gear 22 mounted at the end of the main shaft 20, and the permanent magnet roller 3 is driven by the slewing bearing 21 to rotate in the direction indicated by the arrow in FIG. 2, the rotation direction of the permanent magnet roller 3 and the slurry.
  • the ore-input direction is reversed; a magnetic system 8 fixed to the groove body 6 is provided in the permanent magnet roller 3, and a magnetic system adjustment device 1 for adjusting the magnetic system 8 is provided outside the magnetic separator, and the magnetic system adjustment device 1 is provided.
  • the inlet side of the tank body 6 is connected to the feeding box.
  • the magnetic system 8 has a multi-pole structure, the number of magnetic poles is preferably 16-65 poles, and the wrap angle of the magnetic system 8 ranges from 200° to 280°, wherein the magnetic system 8 is adjacent to the trough 6
  • the side area is arranged as a magnetic picking zone 7, which is located above the slurry level in the tank 6 (shown by the horizontal dashed line at the bottom of the tank).
  • the use of large-angle magnetic system makes the selection area of the magnetic separator and the mineral transportation area lengthen, and the multi-magnetic pole structure adopted by the magnetic system increases the number of mineral magnetic rolling, which is not only beneficial to improve the grade of the concentrate, but also Minerals and water can be separated well during long ore mining, and mineral concentration can be better achieved.
  • a plurality of rinsing water pipes 15 are disposed at the upstream position in the tank body 6 corresponding to the magnetic system selection area 7, and the plurality of rinsing water pipes 15 are disposed outside the permanent magnet drum 3 and located in the tank body 6.
  • the rinsing water pipe 15 is spaced apart from the nozzles 151 facing the permanent magnet roller 3, wherein the nozzles 151 on the adjacent rinsing water pipes 15 are alternately arranged.
  • the plurality of rinsing water pipes 15 and the permanent magnet drums 3 are preferably arranged concentrically.
  • a plurality of rinsing water pipes 15 are arranged centripetally with the permanent magnet drum 3, so that the minerals are rinsed and selected in the longer magnetic system selection area after being separated from the slurry surface to remove impurities, thereby improving
  • the grade and the sorting effect are significantly improved compared with the conventional picking machine; and since the rinsing water pipes 15 are all higher than the slurry level, there is no possibility of being blocked by the minerals compared with the conventional rinsing water pipes; the nozzles 151 on the adjacent rinsing water pipes 15 are staggered. Set to make the rinsing more thorough without leaving a dead end.
  • a plurality of strip-shaped magnetic conductive sheets 23 are spaced apart on the inner wall of the cylindrical body 19 of the permanent magnet roller 3.
  • the magnetic conductive sheet 23 can be made of a magnetic conductive sheet made of stainless steel, and the number can be increased or decreased according to actual conditions.
  • a magnetic shield is continuously formed between the magnetic conductive sheet 23 and the magnetic pole, thereby generating an agitating magnetic field on the surface of the permanent magnet roller 3, and the mineral is continuously agglomerated, dispersed, and regenerated during the sorting process.
  • the state of agglomeration is supplemented by the rinsing water sprayed from the multi-stage rinsing water pipe 15 to sufficiently separate the impurities in the mineral, thereby further improving the concentrate grade.
  • the feeding tank is a tubular feeding tank 16, and the tubular feeding tank 16 comprises a pipe body closed at both ends of the inlet side of the tank body 6, and at least one feeding port is provided at the top of the pipe body. 13.
  • a tapping slit is disposed at the bottom of the pipe body, wherein the extending direction of the tapping slit is consistent with the axial direction of the permanent magnet drum 3.
  • the tapping slit 17a is uniform throughout the length of the tapping slit.
  • the tapping slit can also be optimized as follows: the width of the tapping slit corresponding to the ore feeding port 13 is slightly narrower than the width of the remaining part of the tapping slit, and the width of the tapping slit 17b The length of the entire tapping slit is not equal width.
  • the advantage of this design is that the slurry is fed into the tube body from the feed port 13 and the flow rate of the slurry corresponding to the tapping slit of the feeding port 13 is slightly larger than that of the other.
  • the slurry flow rate at the tapping slit using the structure of the tapping slit 17b, can make the tapping slit 17b
  • the outflow velocity in the entire length direction tends to be uniform, which is conducive to the uniformity of beneficiation and improve the final concentrate grade.
  • the bottom of the tank body 6 is vertically provided with an overflow plate 14 corresponding to the position of the tubular feeder tank 16, wherein the overflow plate 14 is located downstream of the tapping slit and extends The direction is the same as the direction in which the tapping slit extends.
  • a flushing device 5 is disposed.
  • the flushing device 5 adopts a flushing water pipe, which can adjust the concentration of the slurry before it enters the sorting, and relax the equipment. Requirements for the selected mineral concentration.
  • two layers of discharge squeegees are disposed above and below the unloading side of the magnetic separator, i.e., the first stage discharge squeegee 10 at the upper portion and the secondary discharge squeegee 11 at the lower portion.
  • the first discharge scraper 10 is fixedly mounted on the concentrate ore bin 12, and the secondary discharge scraper 11 is mounted on the frame. The setting of the two-stage discharge scraper ensures that the unloading is clean, the run-off is reduced, and the concentrate concentration is increased.
  • the refined slag magnetic separator of the invention can significantly improve the grade of the product, and the concentration of the concentrate is high; and the structure is compact, the volume is small, the processing time of the equipment is large, and the production efficiency is high. Increase the economic benefits of the concentrator.
  • the refined slag-reducing magnetic separator of the invention solves the technical problems of the complicated structure, large volume, low concentrate grade, complicated control system and low production efficiency of the existing magnetic weight type selection equipment.

Abstract

一种提精降渣磁选机，包括顺流型槽体（6）及转动设置于槽体内的永磁滚筒（3），永磁滚筒的转动方向与矿浆的入矿方向相反，永磁滚筒内设有固定的磁系（8），槽体的进矿侧与管式给矿箱（16）连接，磁系的包角范围为200°-280°，磁系为多磁极构造，磁系靠近槽体的进矿侧的区域为磁系精选区（7），磁系精选区位于槽体内的矿浆液面之上；槽体内的上游位置对应磁系精选区处设置有多道漂洗水管（15），漂洗水管设置在永磁滚筒的外侧且位于槽体内的矿浆液面之上，漂洗水管上间隔设有若干朝向永磁滚筒的喷头（151）；永磁滚筒的内壁上间隔设有若干条形的导磁薄片（23）。该提精降渣磁选机可以显著提高产品的品位，分选出的精矿浓度高；结构紧凑，设备台时处理量大，生产效率高。

Description

提精降渣磁选机
本申请要求于2014年01月25日提交中国专利局、申请号为201410036271.2、发明名称为“提精降渣磁选机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及选矿设备技术领域，特别涉及一种提精降渣磁选机。
背景技术
随着矿产资源的开发利用，不仅大量的矿石要经过选矿加工才能利用，而且入选矿石中难选矿愈来愈多，同时冶炼对精矿质量越来越严，选矿过程中如何尽可能用最简洁的方式提高精矿品位,是摆在选矿工作者面前的一项重要课题。
精选浓缩磁选机是随着近年来选矿工艺技术的进展发展起来的一种用于提高精矿品位和浓度的磁选设备，其工作原理是借助磁力与机械力对矿粒的作用而实现对矿物的分选，可分选的矿物种类包括各类磁铁矿、赤铁矿、褐铁矿、锰矿等。目前，各选矿厂普遍采用的精选浓缩分选设备主要是一些磁重类设备，如脱泥槽或电磁淘洗磁选机等，但这类设备的不足之处在于：一、体积大，结构复杂，安装不方便；二、耗水量大；三、控制系统复杂，选矿指标不稳定；四、要求的入矿浓度低，设备台时处理量低。现有设备的种种不足，严重的制约了选矿厂的生产效率和经济效益。
发明内容
本发明所要解决的技术问题是：提供一种提精降渣磁选机用于代替现有的精选浓缩设备，此类提精降渣磁选机可以显著提高产品的品位，分选出的精矿浓度高。
为解决上述技术问题，本发明的技术方案如下：
一种提精降渣磁选机，包括固定设置于机架上的槽体，所述槽体内转动设有由动力装置驱动的永磁滚筒，所述永磁滚筒内设有相对于所述槽体固定的磁系，所述槽体的进矿侧与给矿箱连接，所述磁系的包角范围为200°-280°，所述磁系为多磁极构造，所述磁系靠近所述槽体的进矿侧的区域为磁系精选区，所述磁系精选区位于所述槽体内的矿浆液面之上；所述槽体内的上游位置对应所述磁系精选区处设置有多道漂洗水管，多道所述漂洗水管设置在所述永磁滚筒的外侧且位于所述槽体内的矿浆液面之上，每道所述漂洗水管上间隔设有若干朝向所述永磁滚筒的喷头，相邻的所述漂洗水管上的喷头交错设置；所述永磁滚筒的内壁上间隔设有若干条形的导磁薄片，所述导磁薄片的延伸方向与所述永磁滚筒的轴向一致。
进一步地，多道所述漂洗水管与所述永磁滚筒同心排布。
进一步地，所述给矿箱为管式给矿箱，所述管式给矿箱包括设置于所述槽体进矿侧的一个两端封闭的管体，所述管体的顶部设有至少一个给矿口，所述管体的底部设置有出矿狭缝，所述出矿狭缝的延伸方向与所述永磁滚筒的轴线方向一致；对应于所述给矿口处的所述出矿狭缝的宽度窄于或等于其余部分的出矿狭缝的宽度。
进一步地，所述磁选机在卸矿侧上下设置有两层卸料刮板。
本发明具有以下有益效果：
本发明的提精降渣磁选机，采用200°-280°的大包角磁系后，使磁选机的精选区和矿物的输送区加长，加上磁系采用的多磁极构造使矿物磁翻滚次数增加，不但有利于提高精矿的品位，而且在较长的运矿过程中矿物与水能较好的分离，实现了矿物的浓缩；由于在磁系精选区与永磁滚筒向心排布多道漂洗水管，使矿物在脱离矿浆液面后在较长的磁系精选区进行漂洗精选、浓缩，选别效果较传统精选机显著提高；且由于磁系精选区和漂洗水管全部高出矿浆液面，与传统的漂洗水管相比，没有被矿物堵塞的可能；相邻漂洗水管上的喷头交错设置，使漂洗更彻底，不留死角；由于在永磁滚筒的内壁上设置若干条形的导磁薄片，在永磁滚筒旋转过程中，导磁薄片与磁极之间不断地形成磁屏蔽， 从而在永磁滚筒表面产生一种搅动磁场，矿物在分选过程中不断地产生团聚、分散、再团聚的运动状态，再辅加以多道漂洗水管喷出的漂洗水，使矿物中的杂质得以充分的分离，从而使精矿品位进一步提高。
由于采用管式给矿箱，管体底部设置的与永磁滚筒轴线方向一致的出矿狭缝，可以确保进入磁选机分选的矿浆在滚筒轴向上均匀分布，从而有利于选矿，有利于提高最终选出的精矿品位；当对应于给矿口处的出矿狭缝的宽度窄于其余部分的出矿狭缝的宽度时，便于调整不同区段的矿浆流出速度，使整个出矿狭缝长度内的矿浆流出速度趋于一致，有利于选矿的均匀一致。
当在磁选机的卸矿侧上下设置两层卸料刮板后，可以确保卸矿干净，减少跑尾，提高精矿浓度。
综上所述，本发明的提精降渣磁选机，综合采取以上多种措施，可以显著提高产品的品位，分选出的精矿浓度高；且结构紧凑，体积小巧，设备的台时处理量大，生产效率高，提高了选矿厂的经济效益。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明的提精降渣磁选机的结构示意图；
图2是图1中的A-A剖视示意图；
图3是本发明的提精降渣磁选机的槽体结构示意图；
图4是本发明的提精降渣磁选机的管式给矿箱示意图；
图5是图4中管式给矿箱出矿狭缝的一种结构示意图(图4的仰视图)；
图6是图4中管式给矿箱出矿狭缝的另一种结构示意图；
图7是本发明的提精降渣磁选机的永磁滚筒结构示意图；
图8是永磁滚筒内置导磁薄片位置放大示意图；
图9是图8中的A部、B部及C部的放大示意图；
图中：1-磁系调整装置；2-机架；3-永磁滚筒；4-动力装置；5-冲水装置；6-槽体；7-磁系精选区；8-磁系；9-尾矿出口；10-一级卸料刮板；11-二级卸料刮板；12-精矿集矿箱；13-给矿口；14-溢流板；15-漂洗水管；151-喷头；16-管式给矿箱；17a-出矿狭缝；17b-出矿狭缝；18-支承座；19-筒体；20-主轴；21-回转轴承；22-传动齿轮；23-导磁薄片。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1和图2共同所示，本发明提供的提精降渣磁选机，包括固定设置于机架2上的顺流型槽体6，在槽体6的出矿侧设有精矿集矿箱12，在槽体6的底部设有尾矿出口9；在槽体6内转动设有由动力装置4驱动的永磁滚筒3，永磁滚筒3的下半部位于槽体6内，驱动永磁滚筒3转动的动力装置4为本领域的常规技术，如图7所示，永磁滚筒3内的主轴20支撑于支承座18上，动力装置4包括电动机及变速箱，变速箱的输出端安装有齿轮，该齿轮与安装在主轴20端部的传动齿轮22啮合，通过回转轴承21驱动永磁滚筒3按图2中箭头所示方向旋转，永磁滚筒3的转动方向与矿浆的入矿方向相反；在永磁滚筒3内设有相对于槽体6固定的磁系8，在磁选机的外侧设有用于调整磁系8的磁系调整装置1，磁系调整装置1为本领域的公知技术，在此不再赘述其结构及原理；槽体6的进矿侧与给矿箱连接。
如图2所示，磁系8为多磁极构造，磁极数优选为16-65个极，磁系8的包角范围为200°-280°，其中，磁系8靠近槽体6的进矿侧的区域设置为磁系精选区7，该磁系精选区7位于槽体6内的矿浆液面(槽体底部的水平虚线所示)之上。采用大包角磁系，使得磁选机的精选区和矿物的输送区加长，加上磁系采用的多磁极构造使矿物磁翻滚次数增加，不但有利于提高精矿的品位，而且在较长的运矿过程中矿物和水能较好的分离，更好地实现矿物的浓缩。
如图3所示，在槽体6内的上游位置对应磁系精选区7处设置有多道漂洗水管15，多道漂洗水管15设置在永磁滚筒3的外侧且位于槽体6内的矿浆液面之上，漂洗水管15上间隔设有若干朝向永磁滚筒3的喷头151，其中，相邻的漂洗水管15上的喷头151交错设置。多道漂洗水管15与永磁滚筒3最好呈同心排布。在磁系精选区7，与永磁滚筒3向心排布多道漂洗水管15，使矿物在脱离矿浆液面后在较长的磁系精选区进行漂洗精选，去除杂质，以提高品位，选别效果较传统精选机显著提高；且由于漂洗水管15全部高出矿浆液面，与传统的漂洗水管相比，没有被矿物堵塞的可能；相邻漂洗水管15上的喷头151交错设置，使漂洗更彻底，不留死角。
如图8和图9所示，在永磁滚筒3的筒体19的内壁上间隔设有若干条形的导磁薄片23。导磁薄片23可选用不锈钢材质的导磁薄片,数量可以根据实际情况有所增减。在永磁滚筒3旋转过程中，导磁薄片23与磁极之间不断地形成磁屏蔽，从而在永磁滚筒3表面产生一种搅动磁场，矿物在分选过程中不断地产生团聚、分散、再团聚的运动状态，再辅加以多道漂洗水管15喷出的漂洗水，使矿物中的杂质得以充分的分离，从而使精矿品位进一步提高。
以下是对上述实施例进一步所作的多处改进：
其中的给矿箱为管式给矿箱16，该管式给矿箱16包括设置于槽体6进矿侧的一个两端封闭的管体，在管体的顶部设有至少一个给矿口13，在管体的底部设置有出矿狭缝，其中出矿狭缝的延伸方向与永磁滚筒3的轴线方向一致。
如图4所示，在管体的顶部设有两个给矿口13，给矿口13的数量可以根据实际需要有所增减。如图5所示，出矿狭缝17a的宽度在整个出矿狭缝的长度方向上是一致的。如图6所示，出矿狭缝还可优化设计为：对应于给矿口13处的出矿狭缝的宽度略窄于其余部分的出矿狭缝的宽度，出矿狭缝17b的宽度在整个出矿狭缝的长度方向上并非是等宽的，这种设计的优点在于，矿浆自给矿口13加入管体内，对应于给矿口13的出矿狭缝处矿浆的流速要略大于其他出矿狭缝处的矿浆流速，采用出矿狭缝17b的结构，可以使出矿狭缝17b 在其整个长度方向上的出矿流速趋于一致，有利于选矿的均匀一致，提高最终的精矿品位。
如图3所示，在槽体6内的底部对应于管式给矿箱16的位置竖向设有溢流板14，其中，溢流板14位于出矿狭缝的下游位置，且其延伸方向与出矿狭缝的延伸方向一致。矿浆自管体底部的出矿狭缝流出后，再经溢流板14的阻挡，这种给矿方式的组合应用可以确保进入磁选机分选的矿浆在永磁滚筒3轴向分布更加均匀。
如图2所示，在槽体6内位于溢流板14之后设置有冲水装置5，冲水装置5采用冲矿水管，可以实现在矿浆进入分选之前对其进行浓度调整，放宽了设备对入选矿物浓度的要求。
如图2所示，在磁选机的卸矿侧上下设置有两层卸料刮板，即位于上部的一级卸料刮板10和位于下部的二级卸料刮板11。其中，一级卸料刮板10固定安装在精矿集矿箱12上，二级卸料刮板11安装在机架上。两级卸料刮板的设置，可以确保卸矿干净，减少跑尾，提高精矿浓度。
综上所述，本发明的提精降渣磁选机，可以显著提高产品的品位，分选出的精矿浓度高；且结构紧凑，体积小巧，设备的台时处理量大，生产效率高，提高了选矿厂的经济效益。本发明的提精降渣磁选机解决了现有磁重类精选设备结构复杂，体积庞大，精矿品位低，控制系统复杂，生产效率低等技术问题。
以上所述仅是本发明较佳实施方式的举例，其中未详细述及的部分均为本领域普通技术人员的公知常识。本发明的保护范围以权利要求的内容为准，任何基于本发明的技术启示而进行的等效变换，也在本发明的保护范围之内。

Claims (4)

  1. 提精降渣磁选机，包括固定设置于机架上的槽体，所述槽体内转动设有由动力装置驱动的永磁滚筒，所述永磁滚筒内设有相对于所述槽体固定的磁系，所述槽体的进矿侧与给矿箱连接，其特征在于：
    所述磁系的包角范围为200°-280°，所述磁系为多磁极构造，所述磁系靠近所述槽体的进矿侧的区域为磁系精选区，所述磁系精选区位于所述槽体内的矿浆液面之上；
    所述槽体内的上游位置对应所述磁系精选区处设置有多道漂洗水管，多道所述漂洗水管设置在所述永磁滚筒的外侧且位于所述槽体内的矿浆液面之上，每道所述漂洗水管上间隔设有若干朝向所述永磁滚筒的喷头，相邻的所述漂洗水管上的喷头交错设置；
    所述永磁滚筒的内壁上间隔设有若干条形的导磁薄片，所述导磁薄片的延伸方向与所述永磁滚筒的轴向一致。
  2. 如权利要求1所述的提精降渣磁选机，其特征在于：多道所述漂洗水管与所述永磁滚筒同心排布。
  3. 如权利要求1或2所述的提精降渣磁选机，其特征在于：所述给矿箱为管式给矿箱，所述管式给矿箱包括设置于所述槽体进矿侧的一个两端封闭的管体，所述管体的顶部设有至少一个给矿口，所述管体的底部设置有出矿狭缝，所述出矿狭缝的延伸方向与所述永磁滚筒的轴线方向一致；对应于所述给矿口处的所述出矿狭缝的宽度窄于或等于其余部分的出矿狭缝的宽度。
  4. 如权利要求3所述的提精降渣磁选机，其特征在于：所述磁选机在卸矿侧上下设置有两层卸料刮板。
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