·CGSL型立环脉动高梯度磁选机 Vertical Ring and Pul

CGSL  立环脉动高梯度磁选机
 CGSL  Vertical Ring and Pulsating High Gradient Magnetic Separator

一、概述

CGSL系列立环脉动高梯度磁选机（以下简称CGSL强磁机）包括CGSL-3000、CGSL-2500、CGSL-2000、CGSL-1750、CGSL-1500、CGSL-1250、CGSL-1000，CGSL-750，CGSL-500等规格，其额定背景磁感应强度为1.0T, 适应于-1.2毫米（-200目占30～100%）的细粒氧化铁矿(赤铁矿、褐铁矿、菱铁矿等)、锰矿、钛铁矿、黑钨矿等多种弱磁性金属矿的湿式分选和黑白钨分离、黑钨与锡石分离，也可用于非金属矿如石英、长石、霞石矿的除铁等方面。其转环立式转动，反冲精矿，并配有脉动机构。它具有富集比大、分选效率高、不易堵塞、对给矿粒度、浓度和品位的波动适应性强、工作可靠，操作维护方便等优点。

CGSL立环脉动高梯度中磁机(以下简称CGSL中磁机)，其额定背景磁感强度为0.4-0.6T，包括CGSL-1500、CGSL-1750、CGSL-2000、CGSL-2500等规格，适用于处理粒度较粗的氧化铁矿、钛铁矿等中等磁性的矿石。在鞍钢工业应用证明，作为红铁矿粗粒级的抛尾设备具有处理量大、尾矿品位低、可调性好、工作稳定、性价比高的优点。

1. Introduction

CGSL Vertical ring and Pulsating High Gradient Magnetic Separators (we call CGSL VPHGMS for short below) include CGSL-3000,  CGSL-2500, CGSL-2000, CGSL-1750, CGSL-1500, CGSL-1250, CGSL-1000, CGSL-750  and CGSL-500. Their rated  background magnetic field is 1.0T (Tesla). They are efficient equipments for processing fine, weakly magnetic minerals, such as  hematite, limonite, wolframite, ilmenite, manganese, tantalum-niobium, and it  can be also applied for cleaning non-metallic minerals, such as Quartzes, Fluorspars and Nephelines. Its separating ring with  matrix rotates vertically and flushing direction of magnetic products is  opposite to that of feeding. A pulsating mechanism is located below the  separating zone. The CGSL separator has the advantages  of large beneficiation ratio, high recovery, non-blocking/plugging of the  matrix, easy adaptability to different particle sizes, density and grade, good  reliability, and it is convenient to operate and maintain.

CGSL Vertical ring and Pulsating Medium Intensity  Magnetic Separators (we call CGSL VPMIMS for short) include CGSL-1500、CGSL-1750、CGSL-2000 and CGSL-2500. Their rated background magnetic field is 0.4-0.6T  (Tesla). They are fit for processing medium magnetic materials like oxidized iron  ore and ilmenite with more coarse size. The industrial application in Anshan  Steel Company proves that it has the advantages of larger capacity, low tail grade, stable performance and high  price-performance ratio.

二、设备构造

如图1所示，CGSL磁选机主要由脉动机构、激磁线圈、铁轭、转环和各种矿斗、供水装置等组成。

2. Structure

The CGSL  separator consists mainly of the pulsating mechanism, energizing coils,  magnetic yoke, separating ring, feed and product boxes as shown in Fig. 1.

1、脉动机构  2、激磁线圈  3、铁轭  4、转环  5、给矿斗  6、漂洗水斗  7、精矿冲洗装置

8、精矿斗   9、中矿斗  10、尾矿斗   11、液位斗   12、转环驱动机构  13、机架

F－给矿   W－清水  C－精矿  M－中矿  T－尾矿

Fig. 1.  CGSL vertical  ring and pulsating high gradient magnetic separator

1-Pulsating  mechanism  2-energizing coils  3-magnetic yoke  4-separating ring  5-feeding box  6-wash water box

7-concentrate flush  8-concentrate  box  9-middling chute  10-tailings box  11-slurry level box  12-ring driver 13-support frame   F-feed  W-water  C-concentrate  M-middling  T-tailings

三、工作原理

转环内装有导磁不锈钢棒或钢板网磁介质（也可根据需要充填导磁不锈钢毛等磁介质）。选矿时，转环作顺时针旋转，矿浆从给矿斗给入，沿上铁轭缝隙流经转环，转环内的磁介质在磁场中被磁化，磁介质表面形成高梯度磁场，矿浆中磁性颗粒被吸着在磁介质表面，随转环转动被带至顶部无磁场区，用冲洗水冲入精矿斗中，非磁性颗粒沿下铁轭缝隙流入尾矿斗中排走。

 转环立式旋转的优点是：如果给矿中有粗颗粒不能穿过磁介质堆，一般会停留在磁介质堆的上表面，即靠近转环内圆周，当磁介质堆被转环带至顶部时，正好旋转了180°，粗颗粒位于磁介质的下部，很容易被精矿冲洗水冲入精矿斗。 

 当鼓膜在冲程箱的驱动下作往复运动时，只要矿浆液面高度能浸没转环下部的磁介质，分选室的矿浆便作上下往复运动，脉动流体力使矿粒群在分选过程中始终保持松散状态，从而有效地消除非磁性颗粒的机械夹杂，显著地提高磁性精矿的品位，此外，矿浆脉动显然对防止磁介质的堵塞也大有好处。

 为了保证良好的分选效果，使脉动充分发挥作用，维持矿浆液面高度至关重要，该机的液位调节可通过调节尾矿斗下部尾矿阀、给矿量或漂洗水量实现。该机还有一定的液位自我调节能力，当外部因素引起液面升高时，尾矿的排放有尾矿斗下部阀门和液位斗溢流面两种通道；当液面较低时，液位斗不排尾矿，尾矿只能从尾矿斗下部阀门排走，此外，液面较低时液面至尾矿阀的高差减小，压力降低，尾矿流速自动变慢。液位斗的液面与分选区的液面同样高，它既能起到自我调节作用，又能供操作者随时观察液位高度。当给矿量有20%波动时，该机靠本身的自我调节能力稳定液位。如果给矿量的波动很大，用户应在给矿前面安装一个恒压箱，让多余的矿浆流回泵池或浓密池，使CGSL磁选机给矿量的波动小于20%。

3. Principle of Operation

Along the periphery of the  ring there is a number of rectangular chambers in which the matrix of the  expanded metal sheets or rods made of magnetic stainless steel are placed. When  the separator is in operation, the ring rotates clockwise as seen from the  access side. The slurry fed from the feed box enters the ring through slots in  the upper yoke. The matrix in the working zone is magnetized. The magnetized  particles are attracted from the slurry onto the surface of the matrix, then  brought to the top of the machine where the magnetic field is negligible, and  are then flushed out into the concentrate box.

The non-magnetic particles  pass through the matrix and enter the tailing box through slots in the lower  yoke under the combined action of slurry pulsation, gravity and hydrodynamic  drag. The pulsating mechanism drives the rubber diaphragm on the tailing box so  that it moves back and forth. As long as the slurry level is adjusted to be  above the fixed level in the slurry level box, kinetic energy due to the  pulsation can be effectively transmitted to the separating zone.

As the flushing direction of discharging  the magnetic fractions is opposite to that of the feed, relative to each matrix  stack, coarse particles can be flushed out without having to pass through the  entire depth of the matrix. The slurry pulsation keeps particles within the  matrix in a loose suspended state all the time. The reverse flush and the  slurry pulsation prevent matrix clogging. Additionally, the pulsation improves  the quality of the concentrate with respect to grade.

These factors not only  ensure the effective recovery of weakly magnetic particles as small as 0.01 mm, but also extend the size range of  the feed material up to 1.2 mm,  thus increasing the upper limit of the particle size to be treated.

四、规格型号和主要参数（CGSL强磁机） Specifications and Parameters (CGSL  VPHGMS)

五、规格型号和主要参数（CGSL中磁机）Specifications and Parameters (CGSL  VPMIMS)