干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。

　　圆盘干式强磁选机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。其工作原理与分选过程：矿石由给矿圆筒预先排出强磁性矿物后，被均匀地排到给矿皮带上，并由皮带送到圆盘下面的磁场间隙中，弱磁性矿物受到磁力作用，被吸到圆盘的尖齿上，并随 圆盘旋转带至皮带的两侧，此处因磁场强度急剧下降，所以在重力与离心力的作用下，落后皮带 两侧的磁性产品的槽子中(一般为精矿);非磁性产品由皮带运到尾矿端排入非磁性产品的槽子 中(一般为尾矿)。

　　盘式磁选机的操作因素主要有：给矿厚度、磁场强度、工作间隙与给矿速度等。

　　强磁场磁选机种类很多，按作业条件，选别过程的介质对磁选机分类，除了干式磁选机外，还有湿式磁选机。

Dry magnetic separator is widely used in sorting less than 2-3 mm weak magnetic minerals and rare metals ore selection again . It has a single disc ( diameter φ = 900 mm) and double disc (φ = 576 mm) and three (φ = 600 millimeters) of three. Magnetic field strength up to 880-1440 kA / m.

The main part of the disc dry magnetic separator magnetic separator strong is a " mountain" shaped electromagnets and sensors rotatable disc suspension components. Disc like a saucer turned upside down with the tines , one of its diameter than the width of the ore belt of about sophomore disc using worm gear drive, adjustable pole electromagnet between the disc and handwheel distance ( adjustment range 0-20 ) mm.

To prevent clogging in the cylinder to the mine built with a weak magnetic field , can be pre- discharge to feed the strong magnetic minerals . It works with the sorting process : After the ore from the mine to the pre- discharge cylindrical ferromagnetic minerals , is uniformly discharged to the mine belt , a belt to the disc by following magnetic gap , weakly magnetic minerals by the magnetic force both sides of the disc being sucked on the tines , and with the disk to rotate with the belt , due to a sharp decline in the magnetic field strength, the force of gravity and centrifugal force , the sides of the belt behind the trough where the magnetic products ( usually concentrate ) ; non-magnetic products shipped to the tailings from the end of the belt into a trough in the non-magnetic product (usually tailings ) .

Disc separator operational factors are: the thickness of the ore , the magnetic field strength , work to mine clearance and speed .

Many different types of strong magnetic separator , according to the operating conditions, the medium of magnetic sorting machine classification process , in addition to dry magnetic separator , wet magnetic separator there .