High-gradient magnetic separator

Abstract

A high-gradient magnetic separator, including a separation ring and its driving device, an ore feeding device, a concentrate unloading device, and a concentrate collection device, wherein the separation ring includes a swivel ring, a magnetic gathering medium stack, an upper magnetic pole, and a lower magnetic pole and an excitation coil group, the concentrate unloading device includes a hydraulic unloading device and a wind unloading device arranged in parallel on the outside of the swivel, and the hydraulic unloading device and the wind unloading device are respectively connected to the concentrate inside the swivel corresponding to the collection device. The present invention adopts the organic combination of water flushing and wind flushing to form the structure of the concentrate unloading device, and makes full use of the combination of medium and high pressure wind flushing and hydraulic flushing to effectively remove the magnetic particles on each magnetic gathering medium, which not only effectively improves its ore discharge speed and unloading efficiency, so as to effectively ensure the recycling rate of mineral products, greatly save water resources, ensure environmental protection, and also greatly increase the pulp concentration of the concentrate, simplify the entire process of beneficiation, and achieve the purpose of the present invention.

Description

Technical field [0001] The invention relates to a magnetic separator for beneficiation, in particular to a high gradient magnetic separator. Background technique [0002] The introduction of the theory of high-gradient magnetic separation has given a qualitative leap in the field of magnetic separation, increasing the types of minerals that can be magnetically separated, and broadening the upper and lower limits of the particle size. Early high-gradient magnetic separators were periodic, also known as magnetic filters. This type of equipment was widely used in situations where the content of magnetic materials was extremely low and the particle size was very fine. The continuous high-gradient magnetic separators that appeared immediately were electromagnetic flat-ring type strong magnetic high-gradient magnetic separators, permanent magnet and electromagnetic double vertical ring high-gradient magnetic separators. The electromagnetic flat-ring high-gradient magnetic separator is ...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent 02134298.9 discloses a dual-frequency pulse double vertical ring high-gradient magnetic separator, which adopts the separation space of horizontal magnetic force lines formed by the left and right magnetic poles and the outer edge of the turntable, and can make the pulp in this space produce and The combination of the dual-frequency pulse device with the direction of the magnetic field line perpendicular to each other can make the difference between the force of the fluid dynamics generated by the pulp pulse and the magnetic force generated by the magnetic field on different magnetic mineral particle groups in different sections of the separation space of the magnetic separator. Efficient separation is obtained, but its concentrate unloading device is also washed with separate water

To sum up, in all these vertical-ring high-gradient magnetic separators, concentrate unloading is carried out by washing with separate water. Since the magnetic gathering medium is composed of multi-layered relatively dense rods and nets, so When washing, only a large amount of water can be used to improve the ore unloading effect. However, there is still a small part of the concentrate that adheres to the magnetic gathering medium and cannot be washed clean, and this part of the concentrate that has not been washed clean is also Occupying the effective surface of the magnetic gathering medium makes the ore unloading effect worse; at the same time, a large amount of flushing water is used to make the slurry concentration of the unloaded concentrate very thin, which not only wastes water resources, but also brings Difficulty, when the concentration does not meet the requirements, the process of concentration must be carried out

The most important thing is that this kind of problem becomes more prominent when the equipment is large-scale. The number of layers of magnetic gathering media used in large-scale equipment is more, and the thickness is larger. To make the concentrate flush clean, in addition to increasing the amount of flushing water In addition, it is also necessary to reduce the speed of the sorting ring, and the reduction of the speed of the sorting ring means that the processing capacity of the equipment is also reduced

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