Beneficiation method and apparatus for fine granule attractive mineral

Abstract

The invention discloses a method and a device for mineral processing of micro-granular magnetic minerals. The method is as follows: the gradient and the rotating speed of a sorting and revolving cylinder are set according to the components of mineral materials; after being put into the sorting and revolving cylinder, the mineral materials are absorbed on the sorting and revolving cylinder and rotate along with the sorting and revolving cylinder; the mineral materials are washed by rinse water and non-magnetic minerals and weak magnetic minerals in the mineral materials are separated to move towards the lower end of the sorting and revolving cylinder to a mine tailing discharge hopper; and under the action of the relative movement of the sorting and revolving cylinder and a spiral magnetic system, the magnetic minerals are moved to the high end of the sorting and revolving cylinder spirally, and are discharged into a concentrate discharge hopper through a spiral mineral discharging plate after the magnetic minerals break away from a magnetic field. The device comprises a stander, a support, a rinsing device, a feeding hopper, a spiral magnetic system, a magnetic conducting outer cylinder, the sorting and revolving cylinder and a transmission device. The sorting and revolving cylinder is supported on the support through a carrier roller; one end of the sorting and revolving cylinder is provided with the mine tailing discharge hopper, while the other end is provided with the concentrate discharge hopper and the spiral mineral discharging plate; and the support is hinged with the stander at the mine tailing discharge end, and is supported on the stander at the concentrate discharge end through a gradient regulating device. The method has large handling capacity and high concentration ratio, and the device has strong handling ability and high coefficient of recovery.

Description

technical field [0001] The invention relates to a mineral processing method and mineral processing equipment, in particular to a mineral processing method and a mineral processing device for fine-grained magnetic minerals. Background technique [0002] The recovery technology of fine-grained mineral raw materials has always been a difficult problem in the mineral processing industry. With the refinement of mineral resources and the implementation of the "concentrated material policy" of metallurgical enterprises, there are more and more fine-grained mineral raw materials that need to be processed and recovered, especially for large-volume and cheap magnetic (strong magnetic, medium magnetic) Or weak magnetic) recovery of fine-grained mineral raw materials. At present, most of the industrial separation and recovery of fine-grained magnetic mineral raw materials use drum magnetic separators or centrifugal separators, but because drum magnetic separators are restricted by the ...

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Problems solved by technology

At present, most of the industrial separation and recovery of fine-grained magnetic mineral raw materials use drum magnetic separators or centrifugal separators, but because drum magnetic separators are restricted by the structure of the equipment, the wrap angle of the magnetic system can generally only reach 90 °~135°, therefore, generally only 3~6 grades of magnetic system can be used, and the magnetic separation materials can only be rolled 3~6 times during the magnetic separation process, which is not conducive to separating the non-magnetic materials mixed in it. In addition, using When the drum type magnetic separator sorts minerals, it feeds the ore pulp into the sorting tank, and the magnetic material is taken out of the liquid surface by the cylinder. After breaking away from the magnetic field force, it is washed with water and enters the magnetic material receiving device. The non-magnetic material is The ore pulp flows into the non-magnetic material receiving tank. Due to the large amount of ore pulp, it causes a great impact force, which makes the recovery rate of fine-grained magnetic materials low.

In the existing centrifugal gravity separator, the centrifugal strength changes by more than ten times or even more than one hundred times, which greatly improves the mass force of the particles. However, as the particle size decreases, it is not enough to obtain good separation of different minerals simply by relying on the difference in specific gravity of the minerals. Sorting, and under the action of strong centrifugal force, the minerals settle densely on the wall of the vessel, lacking proper looseness to remove the mixed gangue minerals. Therefore, centrifugal concentrators usually have disadvantages such as low enrichment ratio, small processing capacity, and intermittent work.

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