Micro-fine grained magnetic-hematite mixed iron ore mineral processing method

A beneficiation method and iron ore technology, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of low grade iron ore, high grade iron tailings in strong magnetic separation, high grade iron tailings, etc.

Inactive Publication Date: 2019-07-09
SINOSTEEL MAANSHAN INST OF MINING RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (1) The iron grade of strong magnetic separation tailings is relatively high, generally 11% to 12%, and the iron loss rate is >15%
[0008] (2) Flotation index of environmental water quality deterioration
Although mud-resistant chemicals have been developed, fine mud accumulates in the system, and the pH value of the entire ring water

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  • Micro-fine grained magnetic-hematite mixed iron ore mineral processing method
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  • Micro-fine grained magnetic-hematite mixed iron ore mineral processing method

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Embodiment Construction

[0030] In order to describe the present invention, a beneficiation method of fine-grained magnetic-erythroic mixed iron ore of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.

[0031] The fine-grained magnetic-red mixed iron ore samples were taken from an iron mine in North China. 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.

[0032] Table 1 raw ore chemical multi-element analysis results (%)

[0033] Laboratory items TF SiO 2

Al 2 o 3

CaO MgO content(%) 30.60 51.32 1.25 1.22 0.92 Laboratory items S P K 2 o

Na 2 o

burn out content(%) 0.014 0.032 0.13 0.088 1.65

[0034] Table 2 Analysis results of raw ore iron phase

[0035] Iron phase Iron phase iron content (%) Occupancy (%) magnetite 6.39 20.87 False Hemati...

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Abstract

The invention discloses a micro-fine grained magnetic-hematite mixed iron ore mineral processing method. The micro-fine grained magnetic-hematite mixed iron ore is crushed for primary grinding, the primary grinding product is fed into primary medium magnetic separation-primary high magnetic separation operation, and the primary high magnetic separation tailings T1 are discarded as qualified tailings; the primary medium magnetic separation coarse concentrate and the primary high magnetic separation coarse concentrate are combined for regrinding, the regrinding product is fed into secondary medium magnetic separation-secondary high magnetic separation operation, and the secondary high magnetic separation tailings T2 are discarded as qualified tailings; and the secondary medium magnetic concentrate and secondary high magnetic concentrate are combined and fed into anion reverse flotation operation, and the primary reverse flotation roughing, primary reverse flotation fining and tertiary reverse flotation sweeping are used, and the reagent system is that the sodium hydroxide is used as pH adjuster, the corn starch is used as iron ore depressant, the lime is used as activator, and RA-915is used as a collector. The method has the advantages of low loss of micro-fine grained iron ore, high iron recovery rate, high iron grade and cleanness and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and is particularly suitable for the beneficiation of fine-grained magnetic-red mixed iron ore. Background technique [0002] With the rapid development of the iron and steel industry, the iron ore resources with good geological conditions, high resource grade and good sortability are almost exhausted, and the fine-grained refractory mixed iron ore resources with poor selectivity have become the focus of mineral processing technology research one. [0003] At present, the commonly used methods for processing fine-grained magnetite at home and abroad include a single weak magnetic separation process, a weak magnetic separation-reverse flotation process, a weak magnetic separation-fine screening-weak magnetic separation process or a weak magnetic separation-gravity separation process. On the basis of weak magnetic separation and tailings, the weak magnetic concentrate is further upg...

Claims

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Application Information

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IPC IPC(8): B03C1/30B03C1/10B03C1/025B03D1/018B03B7/00B03D103/04B03D101/00B03D101/02B03D101/06
CPCB03B7/00B03C1/025B03C1/10B03C1/30B03D1/018B03D2201/007B03D2201/02B03D2201/04B03D2201/06B03D2203/04
Inventor 刘军赵福刚白俊代献红张永杨任新袁启东王炬李亮陈洲
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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