High-intensity magnetic separation method of minerals

Abstract

The invention provides a high-intensity magnetic separation method of minerals. The high-intensity magnetic separation method comprises the step that in the process of high-intensity magnetic separation, high-intensity magnetic roughing and high-intensity magnetic scavenging adopt a horizontal magnetic system and a vertical magnetic system correspondingly to form cross magnetic field separation. The characteristics of high separation precision and good mineral unloading effect of a high-intensity magnetic separator adopting the horizontal magnetic system are fully utilized, and thus the high-intensity magnetic roughing concentrate grade and yield are increased; and the characteristic of high magnetic field intensity of a high-intensity magnetic separator adopting the vertical magnetic system is utilized to recover the weak-magnetism minerals with the low specific susceptibility, and thus the concentrate yield is increased.

Description

Technical field: [0001] The invention relates to a strong magnetic separation method for minerals, and belongs to the technical field of mineral separation methods. Background technique: [0002] The magnetic separator for strong magnetic work generally adopts a single magnetic system magnetic separator. Among them, the vertical magnetic system high gradient strong magnetic machine mainly has the following problems in the actual production and operation process. [0003] 1) During the sorting process, the magnetic minerals are enriched at the upper and lower ends of the medium rod, which is consistent with the direction of the unloading flushing water. During the unloading process, some concentrates cannot be completely unloaded under the eaves of the medium rod, and the unloading effect is not ideal. , affecting the sorting effect. [0004] 2) The strong magnetic minerals in the ore, under the action of a strong magnetic field, are always under the eaves of the magnetic m...

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Problems solved by technology

[0003] 1) During the sorting process, the magnetic minerals are enriched at the upper and lower ends of the medium rod, which is consistent with the direction of the unloading flushing water. During the unloading process, some concentrates cannot be completely unloaded under the eaves of the medium rod, and the unloading effect is not ideal. , affecting the sorting effect

[0004] 2) The strong magnetic minerals in the ore, under the action of a strong magnetic field, are always under the eaves of the magnetic medium when unloading. After a long period of operation, the accumulation of very hard and strong magnetic substances is formed under the eaves of the magnetic medium, thus The medium box is blocked, which is difficult to clean and affects the sorting effect of the strong magnetic machine

[0005] 3) The fluid force generated by the reciprocating motion of the pulp in the vertical magnetic system high-gradient strong magnetic machine presses or pulls the particle group in the front, because there is a medium in front or behind the particle group, which hinders the erosion of the magnetic medium rod by the pulp, and the vertical magnetic system Due to the small gap in the magnetic system of the high-gradient strong magnetic machine, the flow rate of the pulp generated by the pulsation is amplified, and the pulp violently impacts the magnetic medium rod, forming a high-speed turbulent flow, which is not conducive to the evacuation of the particle group, and the non-magnetic and magnetic substances mixed in the particle group The weaker joints cannot be washed out effectively, and the concentrate grade and recovery rate cannot be taken into account at the same time

However, because the magnetic medium box of the horizontal magnetic system pulsating high-gradient magnetic separator can adopt the straight discharge medium method, it cannot generate high magnetic field strength, so it cannot fully recover the iron minerals with weak magnetic properties.

[0007] Therefore, the magnetic separation of the single magnetic system currently used cannot fully recycle iron minerals.

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