永磁筒式磁选机适用于湿式选别细颗粒的强磁性矿物，或者除去非磁性矿物中混杂的强磁性矿物。本机可以连续给矿和排矿，磁场深度大，工作间隙大，具有较高的处理能力。其原理是当矿浆进入磁场区时，其中强磁性矿物被吸附在圆筒表面，弱磁性和非磁性矿物被甩掉排出，而吸附在圆筒表面上的强磁性矿物随圆筒旋转，被带出磁场区，用冲洗水冲入精矿槽中，完成分选作业。　　同一圆筒可配三种槽体，即顺流槽(CTS)、逆流槽(CTN)和半逆流槽(CTB)，以适应不同的选别要求。顺流槽适用于矿石粒度为6一Omm的粗选和精选。逆流槽适用于矿石粒度为0．6一Omm的粗选和精选，以及选煤工业中重介质回收。半逆流槽适用于矿石粒度为0．5～Omm的粗选和精选，尤其适用于粒度为0．15～Omm矿物的精选。

Permanent Magnetic Drum Separator suitable for wet sorting fine particles of ferromagnetic minerals, or removal of the non-magnetic minerals mixed ferromagnetic minerals. The machine can continuously discharge to the mine and mine field depth, work space, with high processing power. The principle is that when the pulp into the magnetic field, where strong magnetic minerals are adsorbed on the surface of the cylinder, the weak magnetic and non-magnetic minerals is to get rid of the discharge, while adsorbed on the surface of the cylinder with the cylinder rotation and strong magnetic minerals, was taken the magnetic field, with the rinse water into the concentrate tank, complete the sorting operation. The same cylinder can be equipped with three types of tanks, namely downstream slot (CTS), countercurrent tank (CTN) and semi-countercurrent tank (CTB), in order to adapt to different sorting requirements. Downstream slot for the ore particle size 6 a Omm crude selection and selection. Countercurrent tank for the ore particle size of 0.6 and a roughing Omm selection, as well as heavy medium coal preparation industry recovery. Half countercurrent tank for the ore particle size of 0.5 ~ Omm crude selection and selection, especially for particle size selection 0.15 ~ Omm minerals.