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Magnetic separation method for obtaining high-grade iron ore concentrate

An iron concentrate, high-grade technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of limited separation space and short separation time, and achieve improved grade, high energy consumption, and energy consumption. low effect

Active Publication Date: 2015-09-09
UNIV OF SCI & TECH LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing magnetic separation technology is mainly based on the enhanced magnetic stirring effect. Magnetic stirring can break up the formed magnetic chains, magnetic clusters and physical agglomerates, and the gangue mixed in it is reunited-breakup-agglomeration-rebreakup The more times the magnetic cluster breaks up, the smaller the gangue inclusions will be, and the better the sorting effect will be. However, this type of magnetic separation equipment has limited sorting space and short sorting time.

Method used

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  • Magnetic separation method for obtaining high-grade iron ore concentrate
  • Magnetic separation method for obtaining high-grade iron ore concentrate
  • Magnetic separation method for obtaining high-grade iron ore concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a magnetic separation method for obtaining high-grade iron ore concentrate, the method adopts the process of wet magnetic separation 9 times + wet grinding magnetic separation 2 times, the ore powder to be selected has an iron grade of 45.52%, and the magnetic iron is used as the Mainly, iron ore with particle size below 71μm accounts for 89%.

[0025] The steps of the process of "wet magnetic separation 9 times + wet grinding magnetic separation 2 times" are: (1) wet magnetic separation to separate raw material powder to obtain concentrate 1F and tailings slurry 1R; (2) wet magnetic separation to separate tailings slurry 1R, to obtain concentrate 2F and tailings slurry 2R, and combine concentrate 1F and concentrate 2F; (3) wet magnetic separation to separate the mixed slurry of concentrate 1F and concentrate 2F to obtain concentrate 3F and tailings slurry 3R; (4 ) wet magnetic separation to separate concentrate 3F, to obtain concentrate 4F a...

Embodiment 2

[0029] Such as figure 2 As shown, a magnetic separation method for obtaining high-grade iron ore concentrate, the method adopts the process of wet magnetic separation 7 times + wet grinding magnetic separation 8 times, and the ore powder to be selected is the same as that in Example 1.

[0030] The steps of the process of "wet magnetic separation 7 times + wet grinding magnetic separation 8 times" are: (1) wet magnetic separation to separate raw material powder to obtain concentrate 1F and tailings slurry 1R; (2) wet magnetic separation to separate tailings slurry 1R to obtain concentrate 2F and tailings slurry 2R; (3) wet grinding and magnetic separation to separate concentrate 2F to obtain concentrate 3F and tailings slurry 3R; (4) wet grinding and magnetic separation to separate concentrate 3F to obtain concentrate 4F and tailings slurry 4R, merging concentrate 4F and concentrate 1F; (5) wet grinding and magnetic separation of mixed slurry of concentrate 1F and concentrate...

Embodiment 3

[0034] Such as image 3 As shown, a magnetic separation method for obtaining high-grade iron ore concentrate, the method adopts dry magnetic separation 1 time + wet grinding magnetic separation 7 times, the ore powder to be selected contains magnetic iron, false hematite, hematite Iron ore, etc., the iron grade is 27.90%, and the particle size is below 75μm, accounting for 75%.

[0035] The steps of the process of "1 dry magnetic separation + 7 wet grinding magnetic separation" are: (1) dry magnetic separation of raw material powder to obtain concentrate 1F and tailings 1R; (2) wet grinding magnetic separation Separate concentrate 1F to obtain concentrate 2F and tailings 2R; (3)-(8) Wet grinding magnetic separation separates the concentrate obtained in the previous step to obtain concentrate 8F and tailings 3R-8R. Concentrate 8F is the final concentrate with an iron grade of 68.45% and an iron recovery rate of 66.09%. Filter or settle the tailings slurry 2R-8R, and combine t...

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Abstract

The invention discloses a magnetic separation method for obtaining a high-grade iron ore concentrate; and the method combines two modes of magnetic separation and grinding magnetic separation to separate iron ores. The magnetic separation mode comprises parts of a magnet body, a separation plate and a tailing receiver; the latter two are formed to a separation space; and the mode effectively uses the magnetic agglomeration for separating; the grinding magnetic separation mode is magnetic separation after grinding of ore powder to be separated; and the mode effectively uses the friction for separating. The two modes are combined to obtain high-grade iron ores. For low-grade iron ores with the iron grade of 27.90% and with 75% of particle sizes below 75 microns, the iron ores, with the iron grade of 68.45% and the iron recovery rate of 66.09%, separated by the method, are adopted; and for high-grade iron ores with the iron grade of 45.52% and with 89% of particle sizes below 71 microns, the iron ores, with the iron grade of 69.89% and the iron recovery rate of 90.97%, separated by the method, are adopted.

Description

technical field [0001] The invention relates to a magnetic separation method for iron ore, in particular to a magnetic separation method for obtaining high-grade iron concentrate. Background technique [0002] Magnetic separation is an important process of iron ore separation. Most of the existing magnetic separation technology is mainly based on the enhanced magnetic stirring effect. Magnetic stirring can break up the formed magnetic chains, magnetic clusters and physical agglomerates, and the gangue mixed in it is reunited-breakup-agglomeration-rebreakup The more times the magnetic cluster breaks up, the smaller the gangue inclusions will be, and the better the sorting effect will be. However, this type of magnetic separation equipment has limited sorting space and short sorting time. The invention patents that the applicant has applied for, CN104549712A and CN104549725A adopt the magnetic separation components including: magnets, partitions and tailings receivers. On th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/00
Inventor 王绍艳张天昊张志强王莉王月明郭客李硕
Owner UNIV OF SCI & TECH LIAONING