Magnetic hydrocyclone, magneto-gravitational combined separation system and magneto-gravitational combined separation method applied to weakly-magnetic mineral selection

A technology of hydrocyclone and magnetic gravity combination, which is applied in the direction of magnetic separation, chemical instruments and methods, cyclone devices, etc., can solve the problems of low recovery rate of fine-grained weak magnetic minerals, and achieve easy adjustment and control, and environmentally friendly technology , The effect of improving the recovery rate

Pending Publication Date: 2019-01-15
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

[0003] In recent years, high-gradient magnetic separation has been used for rough separation of weakly magnetic minerals, and the obtained rough concentrates have been refined with a centrifuge to obtain better separation indicators, but generally speaking, the recovery of fine-grained weakly magnetic minerals rate is still low

Method used

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  • Magnetic hydrocyclone, magneto-gravitational combined separation system and magneto-gravitational combined separation method applied to weakly-magnetic mineral selection
  • Magnetic hydrocyclone, magneto-gravitational combined separation system and magneto-gravitational combined separation method applied to weakly-magnetic mineral selection
  • Magnetic hydrocyclone, magneto-gravitational combined separation system and magneto-gravitational combined separation method applied to weakly-magnetic mineral selection

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Embodiment 1

[0033] Such as figure 1 and figure 2 As shown, the magnetic hydrocyclone used for weak magnetic mineral concentration in this embodiment includes a hydrocyclone, and the outer wall of the hydrocyclone is uniformly provided with a plurality of permanent magnets 2 for forming a magnetic field gradient, and the magnetic field gradient The direction is from the inside of the hydrocyclone to the outside.

[0034] In this embodiment, the polarities of the permanent magnets 2 are arranged alternately on the side close to the outer wall of the hydrocyclone, and the permanent magnets 2 are all perpendicular to the outer wall of the hydrocyclone. The highest magnetic field generated by the permanent magnet 2 is 0.4T.

[0035] In this embodiment, the hydrocyclone includes a cylindrical section 3 and a conical section 5 that are connected to each other. There is an ore feeding port 7, and the bottom of the conical section 5 is provided with a settling nozzle 6. Both the cylindrical s...

Embodiment 2

[0043] The magnetic hydrocyclone in this embodiment is the same as that in Embodiment 1.

[0044] The combined magnetic-gravity separation system of this embodiment includes the above-mentioned magnetic hydrocyclone and a vertical ring high-gradient magnetic separator.

[0045] Utilize the magnetic hydrocyclone in the present embodiment to carry out the method for combined magnetic gravity separation of hematite, comprising the following steps:

[0046] S1: Grinding weakly magnetic hematite with a grade of 25% to -200 mesh accounts for 80%, and pulping to a mass concentration of 35%, as ore feed;

[0047] S2: use the vertical ring high gradient magnetic separator to rough the above-mentioned feed ore under the condition of 5000-10000GS to obtain rough concentrate, and adjust the coarse concentrate to 45%;

[0048] S3: Use a pump to send it into the magnetic hydrocyclone through the ore feeding port 7 for separation to obtain sand settling and overflow. The ore feeding pressure ...

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Abstract

The invention discloses a magnetic hydrocyclone applied to weakly-magnetic mineral selection. The magnetic hydrocyclone comprises a hydrocyclone body, wherein a plurality of permanent magnets used forforming magnetic field gradient are evenly arranged on an outer wall of the hydrocyclone body, and the direction of the magnetic field gradient points from the inside of the hydrocyclone body to theoutside. The invention further provides a magneto-gravitational combined separation system and a method of using the magneto-gravitational combined separation system to perform magneto-gravitational combined separation. The method comprises the following steps: S1, utilizing a high-intensity magnetic separation machine or a high-gradient magnetic separation machine to coarsely select the weakly-magnetic minerals to obtain rough concentrate; S2, sending the rough concentrate in the S1 into the magnetic hydrocyclone to be separated to obtain settled sand and overflow and collecting the settled sand to obtain a concentrate product. According to the magneto-gravitational combined separation method disclosed by the invention, the difference of specific magnetic susceptibility and specific gravity difference between the weakly-magnetic minerals and gangue minerals is fully utilized; the magneto-gravitational combined separation method can be applied to weakly-magnetic mineral selection and has the advantages of low energy consumption, high separation efficiency, low cost, easiness in adjustment and control and the like.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a cyclone for beneficiation of weak magnetic minerals, a sorting system and a sorting method of weak magnetic minerals. Background technique [0002] Weak magnetic mineral resources mainly include hematite, limonite, siderite, ilmenite, wolframite, manganese ore and tantalum-niobium rare earth ore. These weakly magnetic mineral raw materials have played an important role in my country's economic development. High gradient magnetic separation is a common method for processing weak magnetic minerals, but due to the mechanical inclusion of gangue minerals, it is difficult to obtain qualified weak magnetic mineral concentrate products in a single high gradient magnetic separation operation, and high gradient magnetic separation is usually used in production Rough separation, the obtained rough concentrate is then subjected to flotation and concentration to obtain the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B04C9/00B03C1/00B03C1/031B03C1/033
CPCB03C1/002B03C1/031B03C1/0332B04C9/00B04C2009/002
Inventor 郑霞裕王毓华卢东方
Owner CENT SOUTH UNIV
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