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Compound maghemite ore dressing method

A beneficiation method and iron ore technology are applied in the field of compound iron ore beneficiation, and can solve the problems of low iron concentrate grade, inability to meet actual production needs, and low iron recovery rate.

Active Publication Date: 2016-11-09
SINOSTEEL MAANSHAN INST OF MINING RES
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Problems solved by technology

In the beneficiation process provided in this paper, although the beneficiation process is relatively simple, the grade of iron concentrate obtained is low and the recovery rate of iron is low, which cannot meet the actual needs of production

Method used

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Embodiment Construction

[0029] In order to describe the present invention, a method for beneficiation of magnetic-erythroic composite iron ore of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.

[0030] The magnetic-red composite iron ore samples were taken from an iron mine in Anben area. The chemical multi-element analysis results of the raw ore are shown in Table 1 and the iron phase analysis results are shown in Table 2.

[0031] Table 1 Chemical multi-element analysis results of raw ore (%)

[0032]

[0033] Table 2 Analysis results of raw ore iron phase

[0034]

[0035] It can be seen from Table 1 and Table 2 that the iron ore is low-sulfur phosphorus and high-silicon iron ore, silicon is the main impurity element, and the main recyclable useful iron minerals in the ore are magnetite and red (brown) iron The ore has a low iron grade and TFe is only 32.24%. Because it belongs to the symbiosis of magnetite and red...

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Abstract

The invention discloses a compound maghemite ore dressing method. The compound maghemite ore dressing method comprises the following steps: feeding compound maghemite ore into an ore grinding-grading-low-intensity magnetic separation operation segment to obtain low intensity magnetic separation concentrate and low-intensity magnetic separation tailings; feeding the low-intensity magnetic separation concentrate into a fine sieving operation segment to obtain finely-sieved concentrate C1; feeding the low-intensity magnetic separation tailings into a high-intensity magnetic separation operation segment, and throwing out high-intensity magnetic separation tailings T1 to obtain high-intensity magnetic separation concentrate; combining coarse fraction low-intensity magnetic separation concentrate with the high-intensity magnetic separation concentrate, and feeding the mixture into a pre-grading-two-stage ore grinding-reverse flotation operation segment to obtain reverse flotation concentrate C2, and throwing out reverse flotation concentrate T2. In the method, staged ore grinding and high-intensity tailing throwing are adopted, so that discarding as soon as possible is realized; the low-intensity magnetic separation concentrate is obtained by fine sieving, so that collection as soon as possible is realized; oversize finely-sieved and high-intensity coarse concentrate is ground, so that the amount of ore ground at a second segment is lowered greatly, and energy-saving and consumption lowering are facilitated; an oversize finely-sieved product is reground and floated, so that the flotation grade is raised, and the adaptability of negative ion reverse floatation to ore characteristic fluctuation is improved.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a beneficiation method of composite iron ore in which magnetite and red (brown) iron ore co-exist, and is especially suitable for raw ore iron grade TFe between 28.0%-38.0%. Separation of low-grade, difficult-to-separate magnetic-red composite iron ore. Background technique [0002] The main useful iron minerals in the common magnetic-red composite iron ore are magnetite, hematite and a small amount of limonite, the main gangue mineral is quartz, and a small amount of mica, actinolite and carbonate (calcite, iron dolomite). As we all know, the beneficiation of red limonite has always been a difficult problem in the beneficiation industry, and the magnetic-hematite composite iron ore is more difficult to determine the appropriate beneficiation process because of its complex mineral composition and fine particle size. Looking at the industrial applicati...

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Application Information

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IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 刘军杨任新赵福刚伍红强袁启东王炬张永皇甫明柱李亮常鲁平陈洲虞力李俊宁
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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