Simple and efficient dry magnetic separation method

A dry magnetic separation, high-efficiency technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of separation difficulties, magnetic and non-magnetic particle inclusions, and reduced separation accuracy, achieving large separation space, No magnetic clogging and easy operation

Active Publication Date: 2015-04-29
张天昊 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For dry magnetic separation of fine-grained materials below 200 mesh, due to the adhesion between particles and non-selective agglomeration between magnetic particles, it is easy to cause the inclusion of magnetic and non-magnetic particles, which reduces the separation accuracy and causes Separation is difficult, which is also an urgent problem to be solved in dry magnetic separation

Method used

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  • Simple and efficient dry magnetic separation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a tailings receiver is a simple and efficient dry magnetic separation with a wide-mouth flat bottom container. The iron ore powder to be selected is 30.81% iron grade, including magnetite, false hematite, hematite, particle size 75% of the iron ore is below 75μm.

[0033] Add the iron ore powder M to be selected directly into the glass wide-mouth flat-bottomed container 3, fix the glass partition 2 on the wide-mouth flat-bottomed container 3, the height of the separation area is 18 mm, place the magnet 1 on the partition to form a magnetopolymer For sorting, the magnetic induction generated by the magnet 1 on the other side of the separator 2 is 180-270mT. When sorting, the separator does not move, and the magnet reciprocates above the separator, and the direction of the magnetic field remains unchanged. Under the separator, the iron ore powder M follows the movement of the magnet. During the movement, the iron powder is attracted by the magn...

Embodiment 2

[0035] Such as figure 2 As shown, a simple and efficient dry magnetic separation method with a tailings discharge port at the bottom of the tailings receiver. The iron ore powder to be selected is 49.58% iron grade, including magnetite and hematite, and the particle size is below 75 μm 80% of iron ore.

[0036]The tailings receiver 3 is a wide-mouth plexiglass container with a groove on the upper end, the groove surface is used to carry and fix the partition 2, the bottom is provided with a tailings discharge port, and the maximum height of the separation area is 200mm. The magnetic induction generated by the magnet 1 on the other side of the partition 2 is 520-610 mT. Before sorting, use the magnet 1 to suck the iron ore powder M from the raw material carrier plate 5 through the partition 2; move the magnet 1, the partition 2 and the iron ore powder M to the top of the tailings receiver 3 as a whole The plate is fixed on the tailings receiver 3; the sorting process and pos...

Embodiment 3

[0038] Such as image 3 As shown, a simple and efficient dry magnetic separation method in which the tailings receiver is the raw material carrier plate, the iron ore powder to be selected has an iron grade of 43.43%, including magnetite and hematite, and the particle size is below 75μm, accounting for 86% of iron ore.

[0039] The tailings receiver 3 is a plastic raw material carrier, and the partition 2 is the bottom of an inverted wide-mouth flat-bottomed glass container. The height of the separation area formed is 20mm, and the magnetic induction intensity generated by the magnet 1 on the other side of the partition 2 is 180-270mT . The magnet 1 is placed on the bottom of the wide-mouthed container to form magnetopolymers and then sorted. The sorting process and post-sorting treatment are the same as in Example 1. Thus, an iron concentrate with an iron grade of 63.27% and an iron recovery rate of 73.52% was obtained.

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Abstract

The invention discloses a simple and efficient dry magnetic separation method. A magnetic separation component adopted by the method comprises a magnetic body, a partition plate and a tailings receiver, wherein a selection space is constructed by the partition plate and the tailings receiver; and a selection medium is air. According to the method, firstly, to-be-selected ore powder acts on the other side of the partition plate under the action of the magnetic body to generate magnetic aggregates and a magnetic chain; the magnetic body moves on the fixed partition plate in a reciprocating manner, so that the separation time is prolonged; the ore powder generates 'exclusion action' and 'throwing-off action'; the magnetic selection grading capacity is obviously improved. When the simple and efficient dry magnetic separation method is applied to treatment of 70%-86% of iron ore of which the iron grade is 27.36%-49.58% and the granularity is less than 75 microns, iron concentrate of which the iron grade is greater than or equal to 59.85% and the iron recovery rate is greater than or equal to 73.52% is obtained; and the selection indexes of existing dry magnetic iron ore are greatly improved.

Description

technical field [0001] The invention relates to a separation method of different magnetic minerals, in particular to a simple and efficient dry magnetic separation method. Background technique [0002] Dry magnetic separation usually refers to a beneficiation technology that uses the magnetic difference of materials to separate in the air. Dry magnetic separation of ore is always an important processing link in the dressing plant. Compared with wet magnetic separation, dry magnetic separation has the following obvious advantages: (1) no water separation, simple process; (2) pre-selection tailings, reducing follow-up operation costs; (3) simple equipment structure, less investment low cost. Dry magnetic separation has become the first choice in areas rich in resources but severely short of water. [0003] In the current dry magnetic separation process, uniform and continuous material distribution is required and the material layer is relatively thin, but the phenomenon of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/02B03C1/16
Inventor 王绍艳张天昊王一洋谭晓旭李洋凌玮
Owner 张天昊
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