Magnetic-concentration medium, magnetic-concentration medium box, magnetic-concentration medium column and application thereof for magnetic separator

Abstract

Magnetic gathering medium, magnetic gathering medium box, magnetic gathering medium column and application thereof for magnetic separator. A magnetic gathering medium used in a magnetic separator is processed into strips, columns or rings, and the cross-sectional shape of the magnetic gathering medium is elliptical. A magnetism-gathering medium box, which is mainly composed of a non-magnetic-conductive metal plate and the aforementioned magnetism-gathering medium, the magnetism-gathering medium is processed into strip-shaped or column-shaped magnetism-gathering medium rods, and a plurality of magnetic-gathering medium rods are arranged at intervals between two between the non-magnetic metal plates. A magnetic accumulation medium column, which is mainly composed of multi-layer magnetic accumulation medium rings stacked up and down. The magnetic accumulation medium ring system is formed by concentrically nesting a plurality of magnetic accumulation medium rings from large to small. Each magnetic accumulation medium ring It is composed of the aforementioned magnetic gathering medium, and each magnetic gathering medium ring and each magnetic gathering medium ring system are separated from each other. The present invention can be applied in a magnetic separator to recover fine-grained magnetic minerals; when applied, the direction of the elliptical major axis of the magnetic-gathering medium rod should be parallel to the direction of the background magnetic field of the magnetic separator, and has the advantages of low cost, low energy consumption, and Blockage and the ability to generate high magnetic field gradients and other advantages.

Description

technical field [0001] The invention belongs to the field of mineral processing in mining engineering, and in particular relates to a magnetic gathering medium used in a magnetic separator and its component products and applications. Background technique [0002] With the continuous development of mineral resources, high-grade and easy-to-select iron ore resources are decreasing day by day, and the iron and steel industry is paying more and more attention to fine and poor weak magnetic iron ore mainly composed of hematite, limonite and siderite Efficient development and utilization of resources. High-gradient magnetic separation technology is an effective means to deal with fine-grained and weakly magnetic minerals, and plays an increasingly important role in the development and utilization of mineral resources. The magnetic medium is a key component of the high gradient magnetic separator. The magnetic field characteristics of the magnetic medium often determine the separa...

AI Technical Summary

Problems solved by technology

The magnetic field gradient of the gear plate medium is large, but the depth of magnetic force is small, and it is easy to block

Tightly packed mesh media can generate a large magnetic field gradient, which can promote the recovery of fine-grained minerals, but due to the "magnetic short circuit" phenomenon between media and the problem of easy blockage, the scope of application is very limited

Rod media are widely used in pulsating high-gradient magnetic separators, effectively solving the problem of media clogging, but the magnetic field gradient generated by rod media is limited, and the reluctance in the magnetic circuit is too large, resulting in high energy consumption. With the continuous development of mineral resources , the particle size of the minerals to be processed is getting finer and finer, and the shortage of rod media separation of minerals is also becoming more and more prominent

Chinese patent No. 201110306909.6 discloses an equilateral rhombic medium, whose magnetic field gradient is higher than that of a round rod medium, and there is no "magnetic short circuit" phenomenon, but the high magnetic field gradient of this rhomboid cross-section medium is concentrated at the sharp corner of the rhombus section, and the high The action depth of the magnetic force is small, and the capture range of fine-grained minerals is small

In addition, there are some magnetic media with very special shapes, such as polygonal cross-sections or tooth shapes distributed along the circumference and other complex shapes. Although these magnetic media can also generate large magnetic field forces, due to their complex shapes, processing and manufacturing Difficult, high cost, difficult to apply on a large scale in production

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