CGSL  立環脈動高梯度磁選機
 CGSL  Vertical Ring and Pulsating High Gradient Magnetic Separator

一、概述

CGSL系列立環脈動高梯度磁選機（以下簡稱CGSL強磁機）包括CGSL-3000、CGSL-2500、CGSL-2000、CGSL-1750、CGSL-1500、CGSL-1250、CGSL-1000，CGSL-750，CGSL-500等規格，其額定背景磁感應強度為1.0T, 適應于-1.2毫米（-200目占30～100%）的細粒氧化鐵礦(赤鐵礦、褐鐵礦、菱鐵礦等)、錳礦、鈦鐵礦、黑鎢礦等多種弱磁性金屬礦的濕式分選和黑白鎢分離、黑鎢與錫石分離，也可用于非金屬礦如石英、長石、霞石礦的除鐵等方面。其轉環立式轉動，反沖精礦，并配有脈動機構。它具有富集比大、分選效率高、不易堵塞、對給礦粒度、濃度和品位的波動適應性強、工作可靠，操作維護方便等優點。

CGSL立環脈動高梯度中磁機(以下簡稱CGSL中磁機)，其額定背景磁感強度為0.4-0.6T，包括CGSL-1500、CGSL-1750、CGSL-2000、CGSL-2500等規格，適用于處理粒度較粗的氧化鐵礦、鈦鐵礦等中等磁性的礦石。在鞍鋼工業應用證明，作為紅鐵礦粗粒級的拋尾設備具有處理量大、尾礦品位低、可調性好、工作穩定、性價比高的優點。

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、設備構造

如圖1所示，CGSL磁選機主要由脈動機構、激磁線圈、鐵軛、轉環和各種礦斗、供水裝置等組成。

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、脈動機構  2、激磁線圈  3、鐵軛  4、轉環  5、給礦斗  6、漂洗水斗  7、精礦沖洗裝置

8、精礦斗   9、中礦斗  10、尾礦斗   11、液位斗   12、轉環驅動機構  13、機架

F－給礦   W－清水  C－精礦  M－中礦  T－尾礦

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

轉環內裝有導磁不銹鋼棒或鋼板網磁介質（也可根據需要充填導磁不銹鋼毛等磁介質）。選礦時，轉環作順時針旋轉，礦漿從給礦斗給入，沿上鐵軛縫隙流經轉環，轉環內的磁介質在磁場中被磁化，磁介質表面形成高梯度磁場，礦漿中磁性顆粒被吸著在磁介質表面，隨轉環轉動被帶至頂部無磁場區，用沖洗水沖入精礦斗中，非磁性顆粒沿下鐵軛縫隙流入尾礦斗中排走。

 轉環立式旋轉的優點是：如果給礦中有粗顆粒不能穿過磁介質堆，一般會停留在磁介質堆的上表面，即靠近轉環內圓周，當磁介質堆被轉環帶至頂部時，正好旋轉了180°，粗顆粒位于磁介質的下部，很容易被精礦沖洗水沖入精礦斗。 

 當鼓膜在沖程箱的驅動下作往復運動時，只要礦漿液面高度能浸沒轉環下部的磁介質，分選室的礦漿便作上下往復運動，脈動流體力使礦粒群在分選過程中始終保持松散狀態，從而有效地消除非磁性顆粒的機械夾雜，顯著地提高磁性精礦的品位，此外，礦漿脈動顯然對防止磁介質的堵塞也大有好處。

 為了保證良好的分選效果，使脈動充分發揮作用，維持礦漿液面高度至關重要，該機的液位調節可通過調節尾礦斗下部尾礦閥、給礦量或漂洗水量實現。該機還有一定的液位自我調節能力，當外部因素引起液面升高時，尾礦的排放有尾礦斗下部閥門和液位斗溢流面兩種通道；當液面較低時，液位斗不排尾礦，尾礦只能從尾礦斗下部閥門排走，此外，液面較低時液面至尾礦閥的高差減小，壓力降低，尾礦流速自動變慢。液位斗的液面與分選區的液面同樣高，它既能起到自我調節作用，又能供操作者隨時觀察液位高度。當給礦量有20%波動時，該機靠本身的自我調節能力穩定液位。如果給礦量的波動很大，用戶應在給礦前面安裝一個恒壓箱，讓多余的礦漿流回泵池或濃密池，使CGSL磁選機給礦量的波動小于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、規格型號和主要參數（CGSL強磁機） Specifications and Parameters (CGSL  VPHGMS)

五、規格型號和主要參數（CGSL中磁機）Specifications and Parameters (CGSL  VPMIMS)