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A kind of beneficiation desilicon enrichment method of fine-grained hematite

A hematite and fine-grained technology, which is applied in the field of mineral processing engineering, can solve the problems of small magnetic susceptibility of fine-grained hematite, inability to obtain high-quality iron concentrate, complex process of iron concentrate, etc., to simplify the centrifugal classification process , reduce the cost of beneficiation, and reduce the effect of adverse effects

Active Publication Date: 2018-07-24
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the small magnetic susceptibility coefficient and fine particle size of fine-grained hematite, highly selective agglomeration and dispersion cannot be achieved in a magnetic field, and high-quality iron concentrates cannot usually be obtained by strong magnetic separation; In the traditional gravity separation process, the recovery rate is low and the concentrate grade is low; while the production of iron concentrate by flotation has the problems of complicated process and high operating costs

Method used

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  • A kind of beneficiation desilicon enrichment method of fine-grained hematite

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Embodiment 1

[0020] Hematite in Simao area, Yunnan Province contains 36.41% Fe, SiO 2 39.76%, the main metal minerals are hematite, with a small amount of limonite, and the gangue minerals are mainly quartz, sericite, calcite, kaolinite, etc. After the hematite is crushed and screened, the ore is ground to -200 mesh, accounting for 85%, water is added to adjust the slurry concentration to 15%, and the cyclone continuous centrifugal separator is used for two graded desliming operations, and the overflow is used as the tailings I desliming operation. Remove; Slurry the grit obtained after the double classification of the cyclone continuous centrifugal separator, adjust the concentration to 25%; add sodium carbonate 3500g / t, water glass 300g / t, sodium fluorosilicate 200g / t, Lead acetate 100g / t, MOH900g / t, 2 # Oil 5g / t, after fully sizing, carry out flotation roughing; add lead acetate 100g / t, MOH 100g / t to the underflow after roughing, sweep after sizing, and remove the underflow as tailing...

Embodiment 2

[0022] Fine-grained hematite ore sample 1 in Wuding, Yunnan, containing Fe 38.52%, SiO 2 25.97%, the main mineral is hematite and its embedded particle size is fine, containing a small amount of magnetite, pyrite, limonite, etc.; gangue minerals mainly include chlorite, quartz, kaolinite, diabase, clay etc. After the hematite is crushed and screened, the ore is ground to -200 mesh, accounting for 85%, and water is added to adjust the concentration of the slurry to 20%. The cyclone continuous centrifugal separator is used for two graded desliming operations, and the overflow is used as tailings I for desliming. In addition; adjust the grit obtained after the double classification of the cyclone continuous centrifugal separator, adjust the pulp concentration to 25%, add sodium carbonate 4000g / t, water glass 200g / t, sodium fluorosilicate 100g / t in sequence , lead acetate 150g / t, MOH 800g / t, 2 # Oil 10g / t, flotation roughing after pulping; add lead acetate 50g / t, MOH 150g / t to ...

Embodiment 3

[0024] Fine-grained hematite ore sample No. 2 in Wuding, Yunnan, containing Fe 43.52%, SiO 2 27.97%, the main metal minerals in the ore are hematite and its embedded particle size is fine, containing a small amount of magnetite; the gangue minerals are mainly quartz, calcite, etc. After the hematite is crushed and screened, the ore is ground to -200 mesh, accounting for 90%, water is added to adjust the slurry concentration to 25%, and the cyclone continuous centrifugal separator is used for two graded desliming operations, and the overflow is removed as tailings I The grit obtained after the double classification of the cyclone continuous centrifugal separator is adjusted to a slurry, and the concentration is adjusted to 30%, and then the next step of flotation desiliconization operation is carried out; adding sodium carbonate 4500g / t, water glass 250g / t, Sodium fluorosilicate 150g / t, lead acetate 200g / t, MOH1000g / t, 2 # Oil 15g / t, flotation roughing after pulping; add lead...

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Abstract

The invention relates to a beneficiation desilication enrichment method for fine-particle hematite. The beneficiation desilication enrichment method comprises the steps of levigating the fine-particle hematite, carrying out graded desliming for two times through adopting a cyclone continuous centrifugal separator under certain pulp concentration, and removing high silicon fine silt in advance to obtain fine-particle hematite rough concentrate; and after regulating the rough concentrate to certain pulp concentration, carrying out rough floatation for one time, scavenging for one time, fine flotation for three times and fine scavenging for one time through adopting sodium carbonate as a dispersing agent, water glass and sodium fluosilicate as inhibitors of silicon-containing gangue minerals, lead acetate as an activator of iron minerals, MOH as a collecting agent of hematite and 2#oil as a foaming agent, wherein pulp obtained after scavenging and fine scavenging is adopted as tailings to be removed, and foams obtained after three-time fine flotation are fine-particle hematite concentrate. The step-by-step desilication enrichment method of cyclone continuous centrifugal separator gravity separation desliming pre-enrichment-fine-particle hematite rough concentrate flotation desilication re-enrichment is adopted, the enrichment recycling effect on fine-particle hematite is remarkable, and the method has the advantages that the technology is simple, the medicine consumption is low, and the like.

Description

technical field [0001] The invention relates to a beneficiation, desiliconization and enrichment method of fine-grained hematite, which belongs to the field of mineral processing engineering. Background technique [0002] With the continuous development of my country's iron and steel industry, domestic iron-making enterprises' demand for high-quality iron ore concentrates has grown rapidly. my country is rich in iron ore resources, but more than 1 / 5 of the country's total iron ore reserves are fine-grained and refractory weakly magnetic hematite. [0003] At present, the beneficiation technology of fine-grained hematite is mainly strong magnetic separation, gravity separation and flotation. Due to the small magnetic susceptibility and fine particle size of fine-grained hematite, highly selective agglomeration and dispersion cannot be achieved in a magnetic field, and high-quality iron concentrates cannot usually be obtained by strong magnetic separation; at the same time, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 谢海云陈禄政高利坤周平庄故章童雄李圆洪
Owner KUNMING UNIV OF SCI & TECH
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