2CTB、2CTN、2CTS型雙筒濕式永磁筒式磁選機
 Wet  permanent magnetic double drum separator

國家行業標準JB/T7895

一、適用范圍

該機主要用于弱磁場濕式選別或除去細顆粒的強磁性礦物，廣泛用于選礦，洗煤和化工等行業，如：回收重介質選礦中的磁性重介質如重劑；鐵選礦中低濃渡礦漿的濃縮和磁鐵礦物的富集；處理強磁選機的給礦，清除其中的磁性或較弱磁性礦物及其連生體，防止磁介質堵塞。

在濕式磁選作業中，若要求獲得純凈的磁性礦物，通常選用順流型磁選機。此時，磁性礦物的回收率有可能會降低；若要求****限度地回收磁性礦物，則選用逆流型磁選機。此時，磁性礦的品位有可能會降低。當要兼顧磁性礦物的品位和回收率時，以選用半逆流磁選機較為適宜。

二、工作原理

其原理是當礦漿進入磁場時，其中強磁性礦物被吸附在圓表面，弱磁性和非磁性礦物被甩掉排出，而吸咐在圓筒表面上的強磁性礦物隨圓筒旋轉而被帶出磁場區，用沖洗水沖入清礦槽中，完成分選作業。

三、產品特點

1、介質回收率高達99%；

2、采用高能稀土永磁材料;

3、磁系結構設計合理、穩固、耐用、密封良好；

4、整體設計成模塊式結構、易于對中定位安裝、易于維修；

5、筒體兩端采用耐磨鋁制法蘭；

6、箱體設計結構合理，大顆粒清理方便自如，箱體強度大、鋼度好;

7、傳動系統簡單耐用，易于拆裝，易于調整：

8、調整方法：擰調磁螺絲讓磁場離卸料板3公分左右即可。

四、槽體分類

同一圓筒可配三種槽體，即順水槽（CTS）、逆水槽（CTN）、半逆水槽（CTB），分別適用于不同選別粒度及不同選別工藝的要求。

順水槽適用于礦石粒度為6-0mm的粗選和精選；

逆水槽適用于礦石粒度為0.6-0mm的粗選和精選，以及選煤工業中重介質回質；

半逆流槽適用于礦石粒度為1-0mm的粗選和精選，尤其適用于粒度為0.15-0礦物的精選。

I. Applicable Scope

This type of equipment is mainly used to select wet weak magnetic  field and remove the strongly magnetic minerals of fine grains. They are widely  used in mineral processing industry, coal washing industry, chemical industry,  etc, e.g. recycle heavy formulas such as magnetic heavy media during heavy  media separation, concentrate low-concentration slurry in iron ore and gather  magnetic steel minerals, treat ore feeding from high-intensity magnetic  separators, remove magnetic or weakly magnetic ores and coenobium, as well as  prevent blockage of magnetic media.

During wet magnetic separation, to get pure magnetic minerals,  downstream magnetic separators are usually selected. In such case, the recovery  ratio of magnetic minerals might be reduced. If the magnetic minerals are  required to be recycled to the largest extent, counter-current magnetic  separators shall be selected. In this case, the grade of magnetic minerals  might be reduced. If both the grade and recovery rate of magnetic minerals  shall be taken into account, semi-countercurrent magnetic separators might be  more appropriate.

II. Working Principle

When slurry goes into the magnetic field, the strongly magnetic  minerals are absored on the surface of the circle; the weakly magnetic minerals  and non-magnetic minerals are thrown away and discharged; the strongly magnetic  minerals absorbed on the surface of cylinder are taken out of the magnetic  field as the cylinder rotates. Pour the flushing water to the ore cleaning tank  to finish separation.

III. Product Feature

1. Media recovery ratio is as high as 99%;

2. High energy rare-earth permanent-magnet materials are adopted;

3. The magnetic structure is reasonably designed, stable, durable,  and well sealed;

4. The overall design is of module structure, and is easy for centering  installation and maintenance.

5. Wear-resistant aluminum flanges are adopted at the two ends of  cylinder;

6. The structure of box is reasonably designed; the large  particles can be easily removed; and the box is strong.

7. The transmission system is simply structured, durable and easy  for dismounting and adjustment.

8. Adjustment method: Adjust the magnetic screw to get the  magnetic field around 3 cm  away from the stripper plate.

IV. Classification of Tank

The same one cylinder can be equipped with three types of tanks  i.e. downstream tank (CTS), counter-current tank (CTN), and semi-countercurrent  tank (CTB) which are respectively applicable to different participle size and  different technology.

Downstream tanks apply to rough selection and elaborate selection  of ores with particle size of 6-0mm.

Counter-current tanks apply to rough selection and elaborate  selection of ores with particle size of 0.6-0mm,  as well as recycle of heavy media in coal preparation industry.

Semi-countercurrent tanks apply to rough selection and elaborate  selection of ores with particle size of 1-0mm,  especially to elaborate selection of ores with particle size of 0.15-0mm.

五、型號說明

V. Model Description