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A Flotation Method for Reducing Sulfur Content in Magnetic Separation Iron Concentrate

A technology of iron concentrate and sulfur content, applied in flotation, solid separation and other directions, can solve the problems of strong irritation and strong corrosion, and achieve the effect of easy operation, slowing down equipment corrosion and good operating environment

Active Publication Date: 2021-02-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concentrated sulfuric acid is highly corrosive and irritating, and will become a major hazard during transportation, storage and use

Method used

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  • A Flotation Method for Reducing Sulfur Content in Magnetic Separation Iron Concentrate
  • A Flotation Method for Reducing Sulfur Content in Magnetic Separation Iron Concentrate
  • A Flotation Method for Reducing Sulfur Content in Magnetic Separation Iron Concentrate

Examples

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Effect test

Embodiment 1

[0026] A kind of flotation method of reducing sulfur content in the magnetic separation iron ore concentrate of present embodiment, such as figure 1 shown, including the following steps:

[0027] (1) The magnetically separated iron ore concentrate is slurried, and the slurry concentration is 29%;

[0028] (2) roughing operation: add activator, collector and foaming agent in the ore slurry that step (1) obtains, and activator is (sodium thiosulfate, ferrous sulfate), and collector MA-3 consumption is 100g / t, the amount of foaming agent MIBC is 40g / t, aerated flotation, and the foam product obtained by roughing is concentrate 1;

[0029] (3) Sweeping operation: After the roughing is completed, the products in the tank continue to be scavenged by adding activator, collector and foaming agent, and the agent in the scavenging is halved. 1 and concentrate 2 are combined to form sulfur concentrate, and the product in the tank after sweeping is iron concentrate.

[0030] The flotat...

Embodiment 2

[0034] A kind of flotation method of reducing the sulfur content in the magnetic separation iron ore concentrate of the present embodiment comprises the following steps:

[0035] (1) The magnetically separated iron ore concentrate is slurried, and the slurry concentration is 29%;

[0036] (2) roughing operation: add activator, collector and foaming agent in the ore pulp that step (1) obtains, and activator is sodium thiosulfate, and activator consumption (0g / t, 100g / t, 200g / t t, 300g / t, 400g / t), the amount of collector MA-3 is 100g / t, the amount of foaming agent MIBC is 40g / t, aerated flotation, and the foam product obtained by roughing is concentrate 1;

[0037] (3) Sweeping operation: After the roughing is completed, the products in the tank continue to be scavenged by adding activator, collector and foaming agent, and the agent in the scavenging is halved. 1 and concentrate 2 are combined to form sulfur concentrate, and the product in the tank after sweeping is iron concen...

Embodiment 3

[0042] A kind of flotation method of reducing the sulfur content in the magnetic separation iron ore concentrate of the present embodiment comprises the following steps:

[0043] (1) Slurrying the magnetically separated iron ore concentrate, the slurry concentration is (29%, 32%, 36%, 39%, 43%, 46%);

[0044] (2) Rough separation operation: add activator, collector and foaming agent to the pulp obtained in step (1), the amount of activator sodium thiosulfate is 400g / t, and the amount of collector MA-3 is 100g / t , the amount of foaming agent MIBC is 40g / t, aerated flotation, and the foam product obtained by roughing is concentrate 1;

[0045] (3) Sweeping operation: After the roughing is completed, the products in the tank continue to be scavenged by adding activator, collector and foaming agent, and the agent in the scavenging is halved. 1 and concentrate 2 are combined to form sulfur concentrate, and the product in the tank after sweeping is iron concentrate.

[0046] The f...

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Abstract

The invention discloses a flotation method for reducing sulfur content in magnetically separated iron concentrates, which belongs to the technical field of mineral processing and comprises the following steps: (1) pulping the magnetically separated iron concentrates; (2) roughing operation: Add activator, collector and foaming agent to the ore slurry obtained in step (1), aerate flotation, and the foam product obtained by roughing is concentrate 1; (3) sweeping operation: in the tank after roughing is completed Continue to add activators, collectors and foaming agents to the product for scavenging. The foam product obtained by scavenging is concentrate 2. Concentrate 1 and concentrate 2 are combined to form sulfur concentrate. The product in the tank after scavenging is That is iron ore concentrate. The sulfur content in the iron concentrate of the invention can be reduced to below 0.3%, and the iron recovery rate in the iron concentrate is greater than 98.5%. At the same time, the chemicals used are clean and non-toxic, and easy to transport; no toxic gas is produced, and the operating environment of the production workshop is better; the foam in the flotation process is stable and easy to operate; it has little effect on the acidity and alkalinity of the pulp, which can effectively slow down the corrosion of equipment .

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a flotation method for reducing the sulfur content in magnetically separated iron concentrate. Background technique [0002] Sulfur is extremely harmful to the performance of steel. Steel with high sulfur content has low strength at high temperature and is prone to "hot embrittlement" during rolling or forging. At the same time, high sulfur content will bring many difficulties to blast furnace smelting. Therefore, the less sulfur in iron concentrate, the better. Iron concentrates with high sulfur content must be treated before they can be used. Generally, the sulfur content in iron concentrates is required to be below (0.2% to 0.4%). Iron ore concentrates are the products selected from iron ore through crushing, grinding, magnetic separation, flotation, gravity separation and other processes. At the same time, various metal sulfides are often associated with iron ore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02B03D103/02
CPCB03D1/02B03D2203/02
Inventor 杨聪仁覃文庆焦芬刘瑞增刘维
Owner CENT SOUTH UNIV