Tailings recleaning type drum magnetic separator

Abstract

The invention relates to a tailings recleaning type drum magnetic separator which comprises an ore feeding box, a separation tank, a separation drum, a concentrate washing water pipe, a concentrate box, a concentrate pipe at the bottom of a tank body of the separation tank, a concentrate box ore discharging pipe, a tailings box, a tailings pipe at the bottom of the tank body of the separation tank, a tailings box ore discharging pipe and a control box. A partition plate, a liquid level meter and a stirrer are arranged in the tailing box, two ore outlets are formed in the lower portion of the box body on the right side, two ore distribution pipes are arranged at the positions, corresponding to the ore outlets, of the outer side of the tailing box, one ends of the ore distribution pipes areconnected with the two ore outlets respectively, and the other ends of the ore distribution pipes are connected with an ore return header pipe. The tail end of the return header pipe is connected witha recleaning feeding pipe; The recleaning feeding pipe is arranged on the feeding side of the separation cylinder and provided with a set of spray heads in the length direction of the separation cylinder. The tailings recleaning type drum magnetic separator has the advantages that part of tailings in the tailing box are returned to the surface of the separation cylinder through the ore return header pipe, closed-loop scavenging of the returned tailings is achieved again, and therefore the recovery rate and the yield of magnetic separation concentrate are increased.

Description

technical field [0001] The invention belongs to the technical field of magnetic separation of mineral processing plants, in particular to a tailings re-selection type drum magnetic separator. Background technique [0002] At present, most iron ore minerals have a certain degree of magnetism, so magnetic separation is the most important beneficiation method for iron ore. Among them, strong magnetic minerals such as magnetite and titanium magnetite are mostly separated by drum magnetic separators. Weak magnetic minerals such as hematite, limonite, specularite, etc. are usually separated by vertical ring high-speed magnetic separator and flat-ring high-speed magnetic separator. [0003] Magnetite is currently the most widely used iron ore with large reserves. Due to its strong magnetism, magnetite is separated and recovered by a drum magnetic separator with a low magnetic field strength. The current weak magnetic selection drum type magnetic separators are all permanent magnet...

AI Technical Summary

Problems solved by technology

The current weak magnetic selection drum type magnetic separators are all permanent magnetic separation drums. The magnetic properties of this type of drums gradually decay with the extension of the service life, and the reduction of the field strength on the surface of the sorting drums caused by magnetic decay will cause some The fine-grained iron concentrates with low magnetic properties cannot be absorbed and recovered effectively, which will reduce the iron recovery rate of iron concentrates and the output of iron concentrates, thereby reducing the economic benefits of the concentrator

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