water electromagnetic separator
PTMS MAGNETIC SEPARATOR
what is magnetic separation in Kaolin？
Magnetic separation is a common beneficiation process in mineral processing. It is separated according to the magnetic difference of materials. It is widely used in the separation of black, colored and rare metal ores and the removal of iron impurities from other minerals. It is often used to treat magnetite. Titanium magnetite, hematite, limonite, siderite, chromite and manganese ore. As a common magnetic separation device, the magnetic separation device can be classified into a dry magnetic separator and a wet magnetic separator depending on the material to be processed.
The dry magnetic separator is the mainstream magnetic separation ore dressing equipment. It is also the earliest magnetic separation equipment for industrial weak magnetic separation. It is suitable for dry and water-deficient areas. It can be divided into large blocks, coarse particles and strong magnetic particles and fine particles. Ore, the process is simple. Common dry magnetic separation equipment includes: dry weak magnetic field magnetic separator (iron remover, magnetic pulley), dry strong magnetic field magnetic separator (induction roller magnetic separator, dry electromagnetic disc strong magnetic separator, Dry roll-to-roll magnetic separator).
The magnetic pulley is used for the pre-selection of large-scale strong magnetic ore. It is generally used after the coarse ore of the raw ore is crushed and the final broken product is crushed into the grinding machine. The waste rock can be removed and the ore grade can be improved, thereby reducing the grinding cost.
The induction roller magnetic separator consists of an electromagnetic system, a sorting system and a transmission system. It can be used to recover ilmenite in coastal sand mines, or mixed concentrates such as chromite, monazite, wolframite and iron ore. sorting.
The dry electromagnetic disc type strong magnetic separator is mostly used for the selection of rare metal coarse concentrates, the sorting of weak magnetic ores with a magnetization coefficient greater than 5.0*10-7 m^3/kg and a particle size of less than 2 mm.
The dry-type roller type strong magnetic separator has two magnetic roller relative arrangements, which constitutes a closed magnetic circuit and is driven by a turbine speed reduction mechanism, and can be used for sorting materials containing a plurality of different magnetic minerals having a particle size of 3 mm or less.
Dry magnetic separation requires high material, and the material to be sorted must be dry and in an independent free form, otherwise the magnetic separation effect will be affected. In addition, the beneficiation efficiency of the dry magnetic separator is mainly limited by three factors: the speed of the drum, the position of the baffle and the amount of ore.
The wet magnetic separator is a magnetic separator commonly used in iron ore dressing plants. It can be used not only for sorting operations, but also for magnetic dewatering tanks as a concentration device before filtration. The process is more complicated, and it is necessary to rely on water as the medium for sorting. Common wet magnetic separation equipment includes: wet weak magnetic separation equipment (magnetic dehydration tank, permanent magnet cylindrical magnetic separator), wet strong magnetic separation equipment (wet induction roller type strong magnetic separator, Jones type strong magnetic separator, Flat ring magnetic separator). According to the structure of the tank, the wet magnetic separator can be divided into three types: a forward flow type, a reverse flow type and a semi-reverse flow type.
The wet magnetic separator saves energy and can effectively use extremely poor iron ore and improve the quality of the final iron concentrate. Generally used for fine-grained ferromagnetic and weak magnetic ore and iron powder selection. The two commonly used wet magnetic separators are a forward flow magnetic separator and a semi-reverse flow magnetic separator.
The downstream magnetic separator refers to the direction in which the slurry moves in the same direction as the cylinder moving direction or the product moving direction. The slurry enters directly from the feed tank directly under the cylindrical magnetic system. The non-magnetic and weak magnetic ore particles are discharged from the gap below the cylinder, and the magnetic ore particles are attracted to the surface of the cylinder, and rotate with the cylinder to the edge of the magnetic system. The weak point is discharged from the unloading water pipe to the concentrate tank. The downstream magnetic separator has large processing capacity and can be used in series. It is suitable for rough selection and selection of coarse-grained strong magnetic ore with a dressing size of 0~6mm, and can also be used for recovering magnetic heavy medium.
The semi-reverse flow magnetic separator has high concentrate quality and metal recovery rate. The ore slurry is loosely suspended from the bottom of the tank into the sorting space. The direction of the slurry movement is basically the same as the direction of the magnetic field force. Therefore, the ore particles can reach the surface of the cylinder with high magnetic force, and the tailings are discharged from the tailing hole on the bottom plate. The overflow surface height maintains the level of slurry in the tank. The semi-reverse flow magnetic separator is widely used for roughing and selecting operations of fine magnetic ore (less than 0.2mm), and can be used in combination to improve the concentrate grade.
The choice of magnetic separator is a problem that needs to be considered in many aspects. If you want to know exactly which magnetic separator should be used, you still need to go through a series of processes such as mineral processing test or consult a professional manufacturer. According to the specific conditions of different mines. And set.
