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A simple and high-efficiency magnetic separation method for low-grade iron ore

A magnetic separation and high-efficiency technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of short separation belts of magnetic separation systems, fragile equipment, and difficulty in separating -75μm fine-grained minerals. To achieve the effect of large selection space, low operating cost, huge economic and social benefits

Active Publication Date: 2017-04-19
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

[0004] The existing magnetic separation technology is mainly based on the enhanced magnetic stirring effect. The magnetic separation system has a short sorting belt, the equipment is fragile, and it is difficult to separate -75μm fine-grained minerals

Method used

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  • A simple and high-efficiency magnetic separation method for low-grade iron ore
  • A simple and high-efficiency magnetic separation method for low-grade iron ore
  • A simple and high-efficiency magnetic separation method for low-grade iron ore

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] like figure 1 As shown, a simple and high-efficiency magnetic separation method for low-grade iron ore powder, the iron ore powder to be selected is 30.81% iron grade, including magnetic iron, false hematite, hematite, and the particle size is below 75 μm, accounting for 75% A certain low-grade iron ore.

[0026] like figure 2 As shown, the tailings receiver 3 used in the dry magnetic separation is a wide-mouthed flat-bottomed glass container, the partition 2 is a glass plate, and the height of the separation zone is 18mm. The magnetic induction generated by the magnet 1 used in the dry magnetic separation on the other side of the partition 2 The strength is 210-320mT; the steps of dry magnetic separation are as follows: before separation, first place the iron ore powder M to be selected in the tailings receiver 3, and cover the tail...

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Abstract

The invention discloses a simple and high-efficiency magnetic separation method for low-grade iron ore powder. The magnetic separation components used in the method include: a magnet, a partition and a tailings receiver, and the partition and the tailings receiver are used to construct a sorting space, and after dry magnetic separation, wet magnetic separation is performed. In the present invention, the iron ore powder is made to form "magnetic agglomerates" and "magnetic chains" on the other side of the partition under the action of the magnet, and then the magnet is reciprocated on the fixed partition, thereby prolonging the separation time , and cause the iron ore powder to produce "crowding action" and "throwing action", thereby significantly improving the magnetic separation ability. For the low-grade iron ore with an iron grade of 30.81% and a particle size of 75μm 75%, iron concentrate with an iron grade of 68.13% and an iron recovery rate of 74.08% is obtained after sorting, which meets the requirements of sintering operations.

Description

technical field [0001] The iron ore-related separation method of the present invention is, in particular, a simple and efficient magnetic separation method for low-grade iron ore. Background technique [0002] At present, the selection of low-grade iron ore adopts a combined process. The commonly used processes are stage grinding-coarse and fine classification-gravity separation-magnetic separation-flotation combined process and stage grinding-strong magnetic-reverse flotation process. Magnetic separation is An important processing link in the joint process flow. The current magnetic separation process is far from meeting the needs of production practice for the separation index of low-grade iron ore, and the magnetic separation technology needs to be further strengthened. [0003] CN 104028369A discloses a strong magnetic magnetic separation method for improving the recovery rate of low-grade refractory specularite ore, which can not only obtain part of qualified iron conc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 张志强张天昊王绍艳
Owner UNIV OF SCI & TECH LIAONING
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