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A kind of selective flocculation and flotation method of fine-grained hematite

A hematite and selective technology, which is applied in the field of selective flocculation flotation of fine-grained hematite, can solve the problems of low grade and low recovery rate of flotation concentrate, so as to solve production difficulties, improve grade and recovery rate , Reduce the effect of desliming operation

Active Publication Date: 2021-02-02
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of low grade and low recovery rate of hematite flotation concentrate in the prior art, and provides a selective flocculation flotation method for fine-grained hematite, which can reduce desliming operations At the same time, it ensures the effective separation of the target minerals, alleviates the problems of low grade and low recovery rate of hematite flotation concentrate, and enables the industrial production of fine-grained hematite flotation to go smoothly

Method used

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  • A kind of selective flocculation and flotation method of fine-grained hematite

Examples

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Effect test

Embodiment 1

[0036]The selective flocculation method for fine-grained hematite of the present invention is carried out according to the following steps:

[0037]S1. The hematite is ground into a slurry, and the slurry flows into a stirring tank. The hematite flocculant is added and stirred; specifically, starch is used as the hematite flocculant and inhibitor in this embodiment, and the starch includes but It is not limited to corn starch, sweet potato starch, wheat starch, tapioca starch and modified products of the aforementioned starches; the dosage A of hematite flocculant and inhibitor starch is 500-5000g / t raw ore;

[0038]S2. Then add gangue flocculant, collector and foaming agent to adjust the slurry, and the slurry after mixing flows into the flotation machine for reverse flotation of hematite to obtain coarse hematite concentrate; specifically, this In the embodiment, polyethylene oxide is used as the gangue flocculant, dodecylamine is used as the collector, and terpineol is used as the foam...

Embodiment 2

[0046]The method for selective flocculation and flotation of fine-grained hematite in this embodiment is basically the same as that in Embodiment 1. Furthermore, the molecular weight of polyethylene oxide in this embodiment is 3-12 million, which can realize the effect of gangue mineral The effective flocculation and good selectivity can effectively reduce the impurity content in the flocs. The use effect is excellent. Specifically, the molecular weight of polyethylene oxide in this embodiment is 3 million; and in this embodiment, red After stirring the iron ore flocculant for 2 minutes, add gangue flocculant, collector and foaming agent.

[0047]In this example, the amount A of hematite flocculant and the amount B of gangue flocculant are controlled asAmong them, the coefficient a is (6-30), and the amount of coarse collector C1 in step S2 and the amount of hematite flocculant A are controlled asThe coefficient b is (10-25), the coefficient k is (0.3-0.4), and the ratio of the amount ...

Embodiment 3

[0050]The method for selective flocculation and flotation of fine-grained hematite in this embodiment is basically the same as that in Embodiment 2, except that the molecular weight of polyethylene oxide in this embodiment is 12 million. In this embodiment, hematite is added After stirring the flocculant for 1 min, add gangue flocculant, collector and foaming agent.

[0051]In this example, the amount A of hematite flocculant starch is 3000g / t raw ore; the amount B of gangue flocculant is 550g / t raw ore; the amount C1 of the rough collector in step S2 is 1450g / t raw ore; S2 In step D1, the amount of frothing agent used for coarse separation is 26g / t raw ore; the amount of scavenging collector C2 in step S3 is 200g / t raw ore; the amount of scavenging foaming agent D2 in step S3 is 20g / t raw ore; hematite The amount of ore flocculant A and the amount of gangue flocculant B are controlled asIn the S2 step, the amount of the rough collector C1 and the amount of hematite flocculant A are co...

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Abstract

The invention discloses a selective flocculation and flotation method for fine-grained hematite, which belongs to the field of hematite mineral processing. The present invention is carried out according to the following steps: S1, grind the hematite ore into pulp, the pulp flows into the stirring tank, first add hematite flocculant and stir; S2, then add gangue flocculant, collector and foaming agent Slurry is carried out, and the ore pulp after slurry flow flows into the flotation machine for hematite reverse flotation to obtain hematite coarse concentrate; S3, continue to add collectors and foaming agents for roughing in the flotation machine Sweeping the tailings to obtain hematite scavenging ore and tailings; S4. Concentrating the hematite rough concentrate to obtain hematite concentrate and selected middle ore. The invention overcomes the disadvantages of low grade and low recovery rate of hematite flotation concentrate in the prior art, can ensure effective separation of target minerals while reducing desliming operations, and alleviates low grade of hematite flotation concentrate , The problem of low recovery rate.

Description

Technical field[0001]The invention relates to the technical field of hematite mineral processing, and more specifically, to a method for selective flocculation and flotation of fine-grained hematite.Background technique[0002]China's iron ore resources are abundant but not rich, with the characteristics of low grade of raw ore, complex composition, and fine-grained distribution. At present, my country’s refractory iron ore has the largest reserves of hematite, reaching 95.93×108t, accounting for 72.55% of complex and difficult-to-dress ore, while the utilization rate is only 6.27%. With the further development and utilization of my country's refractory iron ore resources, the development of low-grade fine-grained hematite has become increasingly important.[0003]Flotation is an important method for the treatment of fine-grained hematite. Usually, the industry uses flocculation of certain minerals in the mixture, and then separates the unflocculated fine-grained minerals through deslim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D3/06B03D1/008B03D103/02
CPCB03D1/008B03D3/06B03D2201/002B03D2203/02
Inventor 李明阳代献仁胡义明皇甫明柱张颖异
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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