Dry type fine powder magnetic separator with annular mobile magnetic system

Abstract

A dry type fine powder magnetic separator with an annular mobile magnetic system comprises a magnetic separation main working portion, a magnetic separation auxiliary working portion and a mechanical motion transmission portion, wherein the magnetic separation main working portion comprises the annular motion magnetic system, an annular motion magnetic separation belt which is arranged outside the magnetic system in a sleeving manner and is opposite to the magnetic system in motion direction, and a tailing discharging belt located below the annular motion magnetic separation belt. The magnetic separation auxiliary working portion comprises a discharging hopper arranged above the annular motion magnetic separation belt, a non-magnetic material blocking plate which receives materials thrown by the rotating portion of the annular magnetic, and a magnetic material collecting groove. The annular moving magnetic system and the tailing discharging belt are arranged in a crossing manner, and moving magnets arranged at intervals drag powder on the belt surface to move in a rolling manner, so that the effects of enrichment, tailing discarding and fine separation (scavenging) of the materials which are magnetically classified are sequentially achieved; the separation work area is large, and the unit yield is high; and a plurality of magnetic separators can be arranged on the tailing discharging belt in parallel, and the separation production scale and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of dry magnetic separation equipment, in particular to a dry fine powder magnetic separator with a circular moving magnetic system, which is suitable for dry separation of medium magnetic or weak magnetic fine powder. Background technique [0002] With the development of mineral magnetic separation processing technology, the particle size of separated materials has been reduced from millimeter to micron, and the medium for carrying materials has expanded from general wet to dry. The use of dry magnetic separation is based on two aspects of processing conditions: ①The sorted powder contains active minerals that undergo hydration reactions. When the powder is mixed with water, the active minerals hydrate and the powder is cemented into agglomerates, which not only affects the minerals The sorting operation also deactivates the gelling components. ②In some areas where water resources are extremely scarce such ...

AI Technical Summary

Problems solved by technology

②In some areas where water resources are extremely scarce such as drought and little rain, there is generally a lack of water sources for industrial sorting, and when wet sorting is used, the consumption of water evaporation is too large, and the cost of sorting is too high

The main problems of this equipment when sorting fine materials: ①The centrifugal force is the main competitiveness of throwing materials, and the centrifugal force of particles with different particle sizes from 10 to 100 μm differs by 10 3 times, the centrifuge competitiveness of the same mineral varies greatly due to different particle sizes, and the characteristics of particle size separation are greater than those of magnetic separation, which cannot be well realized by powder magnetic separation.

②The material stays and acts in the sorting working magnetic field for a short time, and the powder sorting cannot be fully carried out

②The working area of ​​the magnetic field is large, and the contact and sorting time of materials in the magnetic field is long

The main problems of this equipment when sorting fine materials: ①Although the material is subjected to vibration during the sorting process, it has not fundamentally overcome the phenomenon of gravitational agglomeration and magnetic agglomeration of fine powder molecules, and the powder is not fully dispersed during the magnetic separation process

②The magnetic field acts on the material flow thickness in the vibrating trough is limited, the material flow speed can not be too fast, and the output is low when a single machine is used

The main problems of this equipment when sorting fine materials: ①When sorting dry fine powder materials, a mechanical vibration device is introduced to overcome the huge gravitational force of fine powder materials, and the dispersion effect of this mechanical vibration is limited.

②The equipment sorting operation area is the magnetic medium rod in the rotary ring. Due to the limitation of the working space and material flow speed, the output of a single machine is low

The main problems of this equipment when sorting fine materials: ①Only a small annular sorting area is formed on the outer surface of the screw shaft, and the amount of processed materials is small

②The mixed magnetic particles fall into the non-magnetic hopper below under the blowing action of the air jet, and there is no chance of being sucked out by magnetic separation again, which affects the purity of the non-magnetic material and the yield of the magnetic material

The basic condition for the sorting operation of this kind of fixed magnetic system or rotary magnetic system fixed on the rotating shaft is that the powder is fully dispersed in the magnetic field first, so some magnetic separation equipment introduces a vibrating device or an air jet purging device to improve the fineness of the magnetic separation process. The dispersibility of the powder, but the fine powder has a strong agglomeration force in the dry state and is difficult to disperse

These magnetic separation equipment cannot fundamentally avoid the problems of poor sorting efficiency and low output per unit of dry magnetic separation of fine powder materials. Advanced magnetic separation equipment with new technical ideas must be adopted to achieve medium or weak magnetic fine powder dry separation. high-efficiency magnetic separation

Images