Method for sorting weak magnetic minerals and apparatus

Abstract

The method for separating 6 mm weak magnetic minerals includes the following steps: a). injecting water into separation tank to defined water level; b). starting and rotating cylinder, feeding the mineral material onto the cylinder being in the separation tank in which the water is held by means of charging hopper; c). in the course of working retaining defined water level always; d). making the non-magnetic mineral flow out from tailings hopper, and the magnetic minerals flow out from concentrate hopper. Said invented separation equipment is characterized by that on the basis of dry cylinder permanent-magnet magnetic separation machine an overflow hole, a water-supplementing pipe and stwching values respectively positioned in the concentrate hoppper bottom portion and tailings hopper bottom portion are added.

Description

Technical field: [0001] The invention relates to an ore dressing method and equipment thereof, in particular to a method and equipment for sorting weakly magnetic minerals. technical background: [0002] At present, for the separation of weak magnetic minerals, dry cylinder permanent magnet magnetic separator is used for more than 6mm, and wet electromagnet magnetic separator is used for less than 1mm. However, there is no method and equipment for the weak magnetic minerals in the 1-6mm section. For the dry cylinder permanent magnet magnetic separator, it mainly consists of a sorting box with fine and tailings buckets; it is installed in the sorting box and driven by the transmission mechanism outside the sorting box to rotate the cylinder; And it is composed of a permanent magnet fixedly installed on the fixed shaft in the cylinder. When the material is sent into the sorting box and falls on the cylinder, due to the rotation of the cylinder, the material is continuously su...

AI Technical Summary

Problems solved by technology

When the material is sent into the sorting box and falls on the cylinder, due to the rotation of the cylinder, the material is continuously subjected to the centrifugal force and the permanent magnetic field, so the non-magnetic minerals fall into the tailings hopper in the direction of leaving the cylinder. The magnetic minerals are attracted by the magnetic field and move toward the cylinder until they fall into the concentrate hopper when the magnetic force is reduced or no magnetic force is reached. Since the material > 6mm is not affected by the moisture of the ore during separation, the effect is better, while When the -6mm material has a certain amount of moisture (primary ore usually has moisture), because the particles are fine, they are bonded to each other, and the dispersion is extremely poor. The separation effect cannot meet the requirements when the dry separation method is used for separation.

For the wet electromagnet magnetic separator, since the magnetic field is a closed-circuit magnetic field, and the separation space is filled with a high-gradient magnetic-conductive medium, the space for materials to pass through is extremely small, and only -1mm weak magnetic minerals can be selected, while for + 1mm material cannot be sorted

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