A kind of circulating wet magnetic separation method

Abstract

The invention discloses a wet-type circulation magnetic separation method which includes the following steps of a. washing and impurity removing; b. filtering and pre-screening; c. feeding; d. first-time magnetic separation; e. first-time opening and closing of (crescent) slurry leaking holes; f. first-time rotating spraying water recycling; g. second-time magnetic separation; h. second-time opening and closing of (crescent) slurry leaking holes; i. second-time rotating spraying water recycling; j. circulation reciprocating magnetic separation; k. rotating slagging; l. reverse floatation. The device adopts a unique double-cone circulation structure. When the circulation structure rotates to different positions under the drive of the driving device, and river sand or metal slurry can be separated in the two hollow cones in a circulation mode. The whole process is automatically controlled by a circuit, human resource waste is reduced, the problems of complex separation method and long separation process are solved, and the effectiveness of the magnetic separation is improved.

Description

technical field [0001] The invention relates to the field of wet magnetic separation, in particular to a wet circulating electromagnetic separator and a magnetic separation method for selecting iron sand from a mixed solution of river sand, ore pulp, non-metallic fine particles and iron impurities and removing iron impurities. Background technique [0002] Magnetic separation is the main beneficiation method for iron ore. After metal ore, especially iron ore, has been beneficiated, the grade has been improved and the impurity content has been reduced, which is beneficial to the smelting process. According to our country's practice, every 1% increase in iron concentrate grade can increase the blast furnace utilization factor by 2% to 3%, reduce coke consumption by 1.5%, and reduce limestone consumption by 2%. Many non-ferrous and rare metal minerals have different magnetic properties. When the final concentrate cannot be obtained by gravity separation and flotation, magneti...

AI Technical Summary

Problems solved by technology

The invention can circulate magnetic separation, improve the utilization rate of the mixed liquid containing ore pulp, non-metallic fine particles and iron impurities, the circulation channels of minerals are simple and not easy to be blocked, and can be closed to process a large amount of feed materials; at the same time, it solves the problem of traditional magnetic separation methods Disadvantages such as large area, long process, inconvenient management, etc.

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