Partitioned excitation type electromagnetic classificator

Abstract

The partition excitation type electromagnetic classificator comprises a separation barrel, a tail control inner coil and a tail control outer coil, the tail control inner coil is installed on the outer wall of an ore conveying pipe of an ore feeder, the tail control outer coil is arranged on the outer wall of a tail control area of the separation barrel, and a scavenging coil is arranged on the outer wall of a scavenging area of the separation barrel. The fine selection coil is arranged on the outer wall of a fine selection area of the separation barrel, and the tail control inner coil, the tail control outer coil, the scavenging coil and the fine selection coil are connected with an electric control cabinet. The tail control inner coil and the tail control outer coil can form a superimposed magnetic field in an overflowing space, all overflowing tailings can pass through a magnetic force acting area, the collecting probability of magnetic particles is increased, and black running caused by a magnetic field cavity area is avoided. The same-direction direct current is supplied to the scavenging coil, the magnetic particles do not vibrate or turn over in the moving process, and the scavenging efficiency is high. Pulsating direct currents in different directions are supplied to the adjacent concentration coils, the magnetic particles continuously vibrate and turn over under the action of the magnetic field of the concentration coils, and the concentration effect is good.

Description

technical field [0001] The invention relates to the technical field of iron ore sorting equipment, in particular to a zone-excited electromagnetic concentrator. Background technique [0002] Half of the mined ore needs to be finely ground and then processed through the beneficiation process before it can be used as raw material for blast furnace ironmaking. High-quality iron concentrate is of great significance for ironmaking. The magnetic separation column has an obvious effect on iron ore and silicon reduction. When the magnetic separation column is working, the magnetic system coil generates an alternating magnetic field that sometimes does not exist, and passes through the rotating and rising flushing water flow. When the coil is energized, the magnetic particles gather together under the action of the magnetic field. When the coil is powered off, the magnetic agglomeration becomes loose, and the gangue and poor intergrowth are washed out under the action of the rotatin...

AI Technical Summary

Problems solved by technology

The application of this equipment has greatly improved the quality of iron ore concentrate, but there are still some problems in the following aspects in terms of its equipment structure and working performance: the tailing effect is insufficient, and the electrified coil of the magnetic separation column has a magnetic field cavity , especially the uppermost excitation coil, without the balance column in the middle of the lower coil to occupy the empty magnetic field area, the magnetic field cavity area is larger, and the magnetic field cavity area is easy to cause the escape and loss of magnetic particles, resulting in overflow and tailing

The refining effect of some minerals is not obvious

All the energizing coils of the magnetic separation column are fed with constant direct current in the same direction, resulting in a single magnetic force, no vibration and flipping of the magnetic particles, and it is difficult for the washing water to wash out the gangue and poor joints in the magnetic agglomeration

The actual separation efficiency is low, and the coil excitation method of the magnetic separation column is generally alternately energized from top to bottom, which easily causes some ore particles to circulate back and forth between the two coils, neither entering the concentrate nor entering the tailings , causing the actual sorting efficiency of the equipment to be low

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