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Novel technology for iron tailing reconcentration

A technology of iron tailings and new process, applied in the comprehensive utilization of resources and the process method of iron tailings re-selection, can solve the problems of low recovery index and complex process flow, and achieve the advantages of improving concentrate grade, simple process and efficient recovery. Effect

Active Publication Date: 2017-08-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve some problems existing in the existing iron tailings re-election process, such as low recovery index and complicated process flow, the present invention provides a new process that can effectively realize iron tailings re-election

Method used

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  • Novel technology for iron tailing reconcentration

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Experimental program
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Effect test

Embodiment 1

[0029] The raw ore (original iron tailings) is taken from the iron ore tailings pool of Shangchang Iron and Steel Group of Kunming Iron and Steel Group, containing 18.79% Fe, which belongs to low-grade, fine-grained and refractory red limonite tailings.

[0030] use as figure 1 In the process flow shown, firstly, the raw ore (iron tailings as it is) is finely ground, and the fineness of the ground product is -25 μm, accounting for 95%.

[0031] The ore grinding product (finely ground pulp) enters the mixing tank, and the agent YL-1 is added in an amount of 1500g / (t raw ore), and interacts in the mixing tank for 10 minutes.

[0032] The ore pulp after the chemical action is fed into the high-gradient strong magnetic separator, and the magnetic separation is carried out under the condition of high stroke frequency. The magnetic separation adopts two open-circuit processes, and the first and second magnetic separation iron concentrates are combined as the final iron concentrate. ...

Embodiment 2

[0035] The raw ore (iron tailings as it is) is taken from the root iron ore tailings pool of Kunming Iron and Steel Co., Ltd., containing 23% Fe, which belongs to low-grade, fine-grained and refractory hematite tailings.

[0036] use as figure 1 In the process flow shown, the raw ore (iron tailings as it is) is further finely ground, and the fineness of the ground product is -25 μm, accounting for 90%.

[0037] The ore grinding product (finely ground pulp) enters the mixing tank, and the drug YL-1 is added at a dosage of 1000g / (t raw ore), and interacts in the mixing tank for 8 minutes.

[0038] The ore pulp after the chemical action is fed into the high-gradient strong magnetic separator, and the magnetic separation is carried out under the condition of high stroke frequency. The magnetic separation adopts two open-circuit processes, and the first and second magnetic separation iron concentrates are combined as the final iron concentrate. mine.

[0039]In stage I high gradi...

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Abstract

The invention relates to a technological method for iron tailing reconcentration, in particular to a novel technology for iron tailing reconcentration and belongs to the field of mineral concentration and resource comprehensive utilization. The novel technology for iron tailing reconcentration is particularly suitable for fine-sized low-grade iron tailings. The novel technology for the iron tailing reconcentration comprises the steps that (1) fine grinding is conducted, wherein the iron tailings are further grinded, the fineness of the grounded tailing products are controlled to be that the products with the fineness being -25 microns accounting for over 80%; (2) an agent acts, wherein the agent YL-1 is added to the fine grinded pulp, the agent and the pulp mutually act for over 5 min under the stirring condition, the dosage of the agent YL-1 is not lower than 800 g / (t raw ores), and the agent YL-1 comprises, by weight, 80%-90% of sodium silicate, 8%-18% of ammonium sulfate and 0.5%-2% of nonionic polyacrylamide; (3) high-jig-frequency high-gradient magnetic separation is conducted, wherein the pulp obtained after the agent acts is fed into a high-gradient strong magnetic separation machine, magnetic separation is conducted under the condition of the high jig frequency, and during high-gradient magnetic separation, the jig frequency is not lower than 250 times / min. By the adoption of the novel technology for the iron tailing reconcentration, reconcentration of the iron tailings can be effectively achieved, namely efficient recycling of iron in the tailings is achieved, the process is simple, the production cost is low, and operation and implementation are easy.

Description

technical field [0001] The invention relates to a process for re-selecting iron tailings, which belongs to the field of mineral processing and resource comprehensive utilization, and is specifically a new process of "fine grinding-pharmaceutical action-high stroke frequency, high gradient and strong magnetic separation", especially suitable for fine Grain size, low grade iron tailings. Background technique [0002] my country's iron ore resources are seriously in short supply, and the degree of dependence on foreign countries continues to increase, reaching as high as 70% in 2011. On the other hand, iron tailings resources are very rich. According to statistics, the amount of iron mine tailings in my country reaches 2.614 billion tons, and it grows at a rate of 130 million tons every year. In many cases, iron tailings are still mines, even rich ore, which have been called "artificial deposits". Therefore, in the case of increasingly scarce iron ore resources and increasing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06
CPCB03B9/06Y02W30/52
Inventor 叶国华蒋京航路璐张世民童雄
Owner KUNMING UNIV OF SCI & TECH
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