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Special iron remover for coal mining
Jun 08, 2018

Special iron remover for coal mining

During the coal mining process, coal is inevitably doped and carried into various metal objects. If the iron objects enter the coal conveying system together with raw coal, coal slime, medium coal, and vermiculite, it will affect the coal conveying machinery and screening equipment first. Operational safety, such as: scratching the belt, damaging the screening equipment, entering the coal mill will accelerate the wear of the steel ball, reduce the output of the milling system, and affect the normal operation of the coal mill. To this end, iron removal equipment is installed at the tail or head of the conveyor belt of the coal conveying system, which is the main equipment for removing iron from the fuel.

Structure and composition

Separators generally use electromagnetic principles. Electromagnetic iron remover is a kind of energy-saving iron removal equipment that uses a new type of heat conduction and insulation material, has a unique magnetic core structure and magnetic circuit design, and can generate a strong magnetic field force. The advantages are: fully enclosed, fully filled, self-cooled, moisture-proof, good insulation, fast heat dissipation, large magnetic potential, strong suction force, and high iron removal rate.

Electromagnetic separators can be used to remove iron from belt conveyors with higher belt speeds, thicker material layers, and harsh environments. If metal detectors can be deployed, they can improve the operating results. Electromagnetic iron remover is an electromagnetic device used to remove iron in loose non-magnetic materials. It is generally installed on the head or middle of a belt conveyor. The powerful magnetic force generated by electricity will be thrown by the iron unloading belt after the iron pieces mixed in the material are sucked up and reach the purpose of automatic removal, and can effectively prevent longitudinal cracking of the conveyor belt and protect the crusher, the grinding machine and other normal work. . Therefore, this series of iron remover is widely used in power, mining, metallurgy, building materials, coal preparation, chemical and other departments.

principle

The magnetic circuit of the iron remover body is reasonable in design, the magnetic field strength is high and the depth of the magnetic permeability is large, so it is suitable for iron removal in the occasion where the material layer is thick. Because of adopting the totally sealed structure and being processed by vacuum drying and other special processes during the manufacturing process, it can effectively prevent dust and harmful gases from eroding the coil, adapting to environment and climate, and having a long service life.

Based on the basic law of the magnetic field generated by the current-carrying coils, an RCDD electromagnetic strip separator is designed. The main and auxiliary poles are welded to the core. The coils are wound into coils according to the heat dissipation conditions. The insulation plates surround the lower plate and the lower plate covers the lower part of the coil. . This design concentrates the magnetic lines of force in the lower part of the iron separator.

When the material conveyed above the conveyor belt passes under the electromagnetic box, the ferromagnetic materials mixed in the material are attracted to the abandoned iron tape by the strong magnetic attractive force, and are carried to the edge of the magnetic system, relying on the inertia of the magnetic magnetic material. And gravity will be dropped on the abandoned iron, so as to achieve the purpose of automatically eliminating iron in the coal stream.