山川烘干机网：磁选机的分类和结构特点　

磁选机的分类
　　
　　磁选机分为干式磁选机和湿式磁选机。
　　
　　该系列磁选机适用于粒度0.1-3mm的磁铁矿、磁黄铁矿、焙烧矿、钛铁矿等物料的湿式磁选，也用于煤、非金属矿、建材等物料的除铁作业。
　　
　　该机的磁系，采用优质铁氧体材料或与稀土磁钢复合而成，筒表平均磁感应强度为100～600mT。本磁选机具有结构简单、处理量大、操作方便、易于维护等优点。磁选机的结构特点：湿式永磁筒式磁选机主要由圆筒、磁系、槽体、传动部分四部分组成。圆筒由2-3mm不锈钢板卷焊成筒，端盖为铸铝件，用不锈钢螺钉和筒相连。电机通过减速机，带动圆筒作回转运动。磁系为开放式磁系，装在圆筒内。磁块用不锈钢螺栓装在磁轭的底板上，磁轭的轴伸出筒外，轴端固定有拐臂。扳动拐臂可以调整磁系偏角，调整合适后可以用拉杆固定。槽体的工作区域用不锈钢板制造，机架和槽体的其他部分用普通钢材焊接。
　　
　　目前磁选机的磁场强度最高(实际测量)是16500GS，对褐铁矿的选别很有效。通常的强磁选机，150的环一般也只能达到13500GS，因此16500GS是革命性的进步。
　
　　磁选机的种类
　　
　　磁选机磁选机的种类繁多:可分为干式强磁场盘式磁选机、平环式强磁场磁选机、SHP型湿式强磁场磁选机、立环湿式强磁场磁选机。
　　
　　干式强磁场盘式磁选机
　　
　　干式磁选机是常用的铁矿设备和锰矿设备,主流的强磁选机选矿设备。分为：一筒三辊干式强磁选机、两筒两辊干式磁选机、一筒一辊干式磁选机；干式强磁场盘式磁选机广泛用于分选小于2—3毫米的弱磁性矿物和稀有金属矿石的再精选。它有单盘(直径φ=900毫米)、双盘(φ=576毫米)和三盘(φ=600毫米)三种。磁场强度可达880-1440千安/米。其中以φ576毫米的双盘式应用较多。磁选机的主体部分是一个“山”字形的电磁铁与可旋转的悬吊感应圆盘组成。圆盘好象一个翻扣的带尖齿的碟子，其直径比给矿皮带的宽度约大二分之一，圆盘采用蜗杆蜗轮减速传动，通过手轮可调节圆盘与电磁铁间的极距(调节范围0—20)毫米。为了防止堵塞，在给矿圆筒内装有一个弱磁场磁极，可预先排出给料中的强磁性矿物。
　　
　　平环式强磁场磁选机
　　
　　平环式强磁场磁选机的构造特点是采用环式链大辩论闭合磁路，铜管绕制线圈，低电压大电流激磁，水内冷散热降温，齿板作分选介质。该机由给矿装置、精矿和中矿冲洗装置、分选转环、磁系、接矿装置、传动装置、直流电源等部分组成。磁系结构新颖。由内外同心环状磁矩、放射状铁芯及线圈构成。主轴位于环状闭合磁路的中心，无磁力线通过。线圈由22×15×2毫米的方铜管绕制而成，每个外铁芯线圈33匝，内铁芯线圈66匝，并且紧靠极头。线圈的散热采用水内冷方式，具有冷却效果好，成本低、无噪音等优点。
　　
　　SHP型湿式强磁场磁选机　　
　　SHP型湿式强磁场磁选机又叫双盘强磁选机，是仿国外琼斯(JONES)强磁机的有关资料试制而成的磁选设备。
　　
　　在钢制框架上装有两上U型磁轭，在磁轭的水平部套有励磁线圈，用轴流风机进行强制冷却。上、下分选圆盘和安装在垂直中心轴上，圆盘在两个相对磁极间转动，通过U型磁轭磁极与上、下两个分选圆盘构成一个大的闭合磁路，而上、下分选盘则是磁路中的主回路。圆盘的周边上布有17个分选室，室内装有多层聚磁齿板，成为感应磁极。圆盘上装有拢矿管，下面有接矿槽，在拢矿管的相应部位装有给矿嘴。
　　
　　立环湿式强磁场磁选机
　　
　　φ800毫米立环湿式强磁选机主要由一个金属环。圆环垂直旋转在两磁极间，下部通过磁场，矿浆由环内下部给矿器通过环内圆筛篦给入环内，弱磁性矿粒粘附在介质环表面，随圆环转动提升到磁场强度很弱的顶部，被高压水冲入精矿槽中。非磁性矿粒由于不受磁力作用通过介质球空隙，流入尾矿槽中。立环湿式强磁场磁选机的主要优点是克服了卧环(平环)磁选机易堵塞的缺点，这是由于介质随圆环旋转在圆环内滚动，破坏了介质磁化所形成的定向排列，起到了消磁作用，从而改善了堵塞现象。磁选机试验表明，对于赤铁矿、菱铁矿、钛铁矿、铬铁矿、黑钨矿、钽铌矿、锰矿、石榴石、钠辉石、角闪石等比磁化系数大于15×10-6厘米3/克的细粒弱磁性矿物的选别，都可以得到较好的分选指标。

Mountains and the dryer nets: magnetic separators classification and structure characteristics

Classification of magnetic separators

Magnetic separators are divided into dry magnetic separators and wet magnetic separators.

This series of magnetic separation machine applicable to the size of the magnetite, 3mm 0.1 - magnetic pyrite, baking ore, iron ore material such as titanium, also used in wet magnetic separation of coal, nonmetalliferous ore, building materials material such as removing fe homework.

This machine adopts the high quality of the magnetic ferrite materials or, with magnets compound and into, canister table for 100 ~ average induction intensity 600mT. This magnetic separation machine has simple structure, large capacity per unit area, convenient operation, easy maintenance, etc. The structure characteristics of magnetic separators wet permanent magnet tube, separators mainly by the cylinder, magnetic department, tub, transmission part four parts. Cylinder by 2-3mm stainless steel plate roll welded tube, cover for aluminum parts, use stainless steel screws and cone connected. Motor driven by reducer, cylinder for rotary motion. Magnetic department to open magnetic department, packed in collective cylinder. Magnets with stainless steel bolts into magnetic yoke on the bottom of the shaft, magnetic yoke out the fixed at cylinder shaft turn arm there. Pull (turn arm can adjust, adjust the appropriate PianJiao magnetic department with bars can be fixed. The tub with stainless steel plate manufacturing working area, frame and other parts of the tub with ordinary steel welding.

At present the magnetic field intensity magnetic separation machine supreme (the actual measurement) is to the 16500GS, limonite is very effective sorting. Usually the strong magnetic separators, 150 ring general also can achieve 13500GS, so 16500GS is revolutionary improvement.

Magnetic separators species

Magnetic separators magnetic separators of various kinds: can be divided into dry strong magnetic field separators, flat disc ring type strong magnetic field separators, SHP type wet strong magnetic field separators, made ring wet strong magnetic field separators.

Dry strong magnetic disc magnetic separators

Dry magnetic separators are used in the iron ore equipment and manganese ore equipment, strong magnetic separation JiXuan ore mainstream equipment. Divided into: a tube of three rollers dry strong magnetic separators, two canister two-roll dry magnetic separators, a tube of a roller dry magnetic separators; Dry strong magnetic field disc magnetic separators are widely used in sorting less than 2 -- 3 millimeter weak magnetic minerals and rare metal ores re-selected. It has single plate (diameter lower = 900 mm), double plate (phi = 576 mm) and three plate (phi = 600 mm) 3 kinds. Magnetic field intensity can reach 880-144 thousand Ann/m. Among them with the double disc 576 mm usually used more often. The main part of the magnetic separators is a "mountain" glyph can rotate the electromagnet and the suspension of induction disk. Like a double disc with buckles teeth dishes, its diameter than the width of the ore belt to about big 1/2, disk drive, using worm worm gear deceleration by handwheel adjustable disk and the polar distances between solenoid adjusting range is 0 - (20) mm. In order to avoid the block, in feed cylinder are equipped with a weak magnetic pole, can advance the strong magnetic from feeding mineral.

Flat ring type strong magnetic field separators

Flat ring type strong magnetic field separators tectonic characteristics is to use ring type chain debate around the system, copper tube closed the magnetic coil, low voltage large current excitation, water cooling, heat inside cold gear plate for separation medium. This machine is composed of the feed device, concentrate and rinse device, separation middlings turn ring, magnetic department, answer the ore device, gearing, dc power components. Magnetic department novel structure. The internal and external concentric circular radial core strength, and coil constitutes. Spindle is located in the center of the ring closure, no field magnetic circuit by. Coil of 22 by 15 x 2 mm square copper pipe system, each round into the core coil of core coil within 33 circle, 66, and abuts extremely stators head. Coil heat dissipation with water inside cold way, has a good cooling effect, low cost, no noise, etc.

The SHP type wet strong magnetic field separators
The SHP type wet strong magnetic field separators also called double-tray strong magnetic separators, is copy foreign JONES (JONES) strong magnetic machine into the relevant material trial-production magnetic separation equipment.

In steel frames equipped with two on u-shaped magnetic yoke, in magnetic yokes of level department set of excitation coil, force with axial flow fan cooled. And under the disc and installed in vertical sorting central axis, the two opposing poles disk between rotation, through the u-shaped magnetic poles, yoke with two sorting disk to constitute a closed magnetic circuit, and, under the magnetic disk is separating main loop. The cloth has a disc peripheral 17 sorting room, interior contains multiplayer assembled magnetic poles, become sensing gear plate. Disk containing approach ore tube, below have meet ore slot, at the part of the beach with ore pipe mouth to mine.

Set ring wet strong magnetic field separators

Phi 800 mm made ring wet strong magnetic separators mainly by a metal ring. Ring in between the two poles rotated, the lower through by rings of magnetic field, the pulp to ore device through rings round sieve grate into rings, and weak magnetic medium on the magnetic particles on the surface adhesion, turning over ring ring ascent to the magnetic field strength is very weak top, be high-pressure water into concentrate slot. The magnetic mineral grains by magnetic effect due to space, through the medium ball into tailings slot. Set ring wet strong magnetic field the main advantages of magnetic separators is overcoming the lie ring (flat ring) magnetic separators easily blocked faults, this is due to ring spinning in the ring with medium, undermining the medium in rolling magnetized by the formation of the directionally aligned and played degaussing function, thus improving the jam phenomenon. Magnetic separators test show that, for hematite, siderite, titanium iron ore, chromite, black tungsten ore, manganese ore, tantalum &niobium, garnet, sodium pyroxene, Angle flash stone form more than 15 x 10 magnetized coefficient 6 centimeters 3 / grams of fine-grained weak magnetic minerals can get sorting good separation perfermances can be.
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