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Dispersed flotation separation method for carbonate-containing iron ore

A separation method and technology for iron ore, applied in flotation, solid separation and other directions, can solve the problems of complex symbiotic relationship, loss of iron metal, and indistinguishable fine tails, etc., and achieve the effect of simple process flow, low cost and elimination of influence.

Inactive Publication Date: 2012-09-26
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the bottleneck problem in the development and utilization of iron ore resources is that the iron ore deposits tend to be miniaturized, complex and low-dilution, the grade and recovery rate of iron concentrate are low, it is difficult to meet the requirements of low-cost smelting, and the loss of iron metal is serious
The reason why complex iron ores are difficult to sort is that the distribution of useful minerals is relatively fine, the symbiotic relationship is complex, and it is not easy to dissociate monomers, or proper dissociation can not effectively separate the minerals. Selective agglomeration, or mutual covering of minerals, greatly reduces the separation selectivity of useful minerals and gangue minerals. For example, the increase of carbonate content in iron ore in Anshan area leads to a decrease in flotation index and fine tailing indiscriminate serious consequences

Method used

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  • Dispersed flotation separation method for carbonate-containing iron ore
  • Dispersed flotation separation method for carbonate-containing iron ore
  • Dispersed flotation separation method for carbonate-containing iron ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1: The following reverse flotation method steps are employed:

[0061] The mass concentration of the slurry of mixed magnetic separation iron concentrate is controlled at 25%, and it is fed into the roughing operation, and the temperature of the slurry is controlled at 38-42°C. At a stirring speed of 2800rpm, sodium hydroxide is added to adjust the pH of the slurry to 11, and the slurry is stirred. 3min, add salted water glass, and stir for 3min, the amount of salted water glass is 800g / t, add starch, and stir for 3min, the amount of starch is 2200g / t, add lime, and stir for 3min, the amount of lime is 600g / t, finally add KS-Ⅲ, and stir for 3 minutes, the dosage of KS-Ⅲ is 1000g / t, roughing for 4.5 minutes;

[0062] The mass concentration of the tailings obtained by roughing is controlled at 20%, and it is put into the sweeping operation for two sweeps, one sweep, first adding sodium hydroxide, adjusting the pH of the slurry to 11, then adding starch, stirrin...

Embodiment 2

[0068] Adjust the pulp concentration and the amount of additives:

[0069] The mass concentration of iron ore concentrate in mixed magnetic separation is controlled at 35% for flotation operations. The dosage of adding salted water glass is 600g / t, the dosage of adding starch is 1800g / t, the dosage of adding lime is 500g / t, adding KS -Ⅲ dosage is 800g / t;

[0070] The mass concentration of the roughing tailings obtained by roughing is controlled at 20%, and two sweeps are carried out. The amount of starch added in the first sweep is 100g / t, and the amount of added starch in the second sweep is 50g / t;

[0071] The roughed concentrate obtained by roughing is subjected to 2 times of beneficiation, the first beneficiation, the dosage of adding lime is 200g / t, the dosage of adding KS-Ⅲ is 400g / t, and the second beneficiation, the dosage of adding lime is 200g / t t, the dosage of adding KS-Ⅲ is 200g / t.

[0072] All the other reverse flotation methods and steps are the same as in...

Embodiment 3

[0074] Adjust the pulp concentration and the amount of additives:

[0075] The mass concentration of the mixed magnetic separation iron concentrate is controlled at 30%, and it is fed into the flotation operation. The dosage of adding salinized water glass is 800g / t, the dosage of adding starch is 2000g / t, and the dosage of adding lime is 800g / t. The dosage of KS-Ⅲ is 1200g / t;

[0076] The mass concentration of the roughing tailings obtained by roughing is controlled at 20%, which is put into the scavenging operation for 2 times of scavenging. For the first scavenging, the amount of added starch is 100g / t, and for the second scavenging, the amount of added starch is 50g / t;

[0077] The roughed concentrate obtained by roughing is subjected to 2 times of beneficiation, the amount of added lime is 500g / t for the first beneficiation, the amount of added KS-Ⅲ is 500g / t, and the amount of added lime is 300g for the second beneficiation / t, the dosage of adding KS-Ⅲ is 300g / t.

[...

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Abstract

The invention relates to a dispersed flotation separation method for carbonate-containing iron ore. The reverse flotation is directly carried out on carbonate-containing mixed magnetic separation iron ore concentrate, i.e. the rough concentration, the scavenging and the selection separation. Particularly, a roughing separation method comprises the following steps of: adjusting the mixed magnetic separation iron ore concentrate into ore pulp with the weight concentration of 20-40%, adding 200-1000g / t of dispersing agent-salinized water glass, adding 1200-2400g / t of inhibitor-starch, adding 400-1000g / t of activating agent-lime, and adding 600-1400g / t of collecting agent-KS-III. As the dispersing agent is added, the covering phenomenon among minerals can be eliminated or weakened, so that the ore pulp is under the stable dispersing status, the influence of the iron carbonate to the flotation can be weakened or reduced, and the iron ore concentrate of which the Fe grade is larger than 66% and the recovery rate is 65%-75% can be finally obtained. The method is simple in technological process and lower in cost.

Description

technical field [0001] The invention relates to a method for dispersing flotation separation of carbonate-containing iron ore. Background technique [0002] At present, my country's current iron ore output is difficult to meet the needs of the iron and steel industry. The increase in the gap between the supply and demand of iron ore has led to an increase in the dependence on iron ore imports, and the price of iron ore has skyrocketed. The main characteristics of my country's iron ore resources are "poor", "fine" and "miscellaneous", with low average grades and a large proportion of complex and difficult-to-select iron ore resources. At present, the bottleneck problem in the development and utilization of iron ore resources is that the iron ore deposits tend to be miniaturized, complex and low-dilution, the grade and recovery rate of iron concentrate are low, it is difficult to meet the requirements of low-cost smelting, and the loss of iron metal is serious. The reason why...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/018B03D101/02B03D101/06
Inventor 邵安林韩跃新张明张兆元印万钟韦锦华
Owner ANSTEEL GRP MINING CO LTD
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