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Method for producing high-quality iron concentrate and sulfur concentrate from high-sulfur iron concentrate

A high-sulfur iron concentrate and sulfur concentrate technology, applied in solid separation, flotation, etc., can solve the problems of iron concentrate recovery loss, poor separation effect, etc., and achieve the effect of saving grinding costs

Active Publication Date: 2019-09-10
内蒙古宏鉮科技发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These flotation agents are not effective in separating high-sulfur iron concentrates, especially pyrrhotite with a deep oxidation degree. It is difficult to reduce the sulfur in iron concentrates to less than 0.3%, and the recovery rate of iron concentrates Larger losses, below 88%

Method used

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  • Method for producing high-quality iron concentrate and sulfur concentrate from high-sulfur iron concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for removing pyrrhotite from high-sulfur iron concentrate mainly includes the following parts:

[0025] 1. Handling of raw materials;

[0026] The high-sulfur iron concentrate with a total iron grade of 67.30% and a sulfur grade of 2.02% is ground to -200 mesh, accounting for 82.1%, and then the ground product is concentrated to a pulp concentration of 40%.

[0027] 2. Activation of pyrrhotite;

[0028] The ore pulp obtained by the above steps is used as the raw material for flotation pyrrhotite, and aluminum sulfate is used as the pH regulator and activator of pyrrhotite. 5min, adjust the pH value to 5.

[0029] 3. Rough separation of pyrrhotite;

[0030] The raw material obtained in the above steps is used as the flotation roughing raw material, and the mass ratio of 2.5:1.5:0.6 amyl xanthate sodium, ethyl xanthate sodium and butyl sodium black medicine is added to the raw material as a catcher for pyrrhotite Collecting agent, stirring 2min under the cond...

Embodiment 2

[0037] A method for removing pyrrhotite from high-sulfur iron concentrate mainly includes the following parts:

[0038] 1. Handling of raw materials;

[0039] The high-sulfur iron concentrate with a total iron grade of 67.40% and a sulfur grade of 3.01% is ground to -200 mesh, accounting for 75.5%, and then the ground product is concentrated to a pulp concentration of 38.5%.

[0040] 2. Activation of pyrrhotite;

[0041]The pulp obtained by the above steps is used as the raw material for flotation pyrrhotite, and the mixture of sodium phosphate, ammonium fluorosilicate and aluminum sulfate is used as the pH regulator and activator of pyrrhotite with a mass ratio of 1:3:2. The dosage of adjuster and activator is 3.4kg / t, stir at natural temperature for 6min, and adjust the pH value to 4.7.

[0042] 3. Rough separation of pyrrhotite;

[0043] The raw material obtained in the above steps is used as the flotation roughing raw material, and the mass ratio of 3:1:0.8 amyl xanthat...

Embodiment 3

[0050] A method for removing pyrrhotite from high-sulfur iron concentrate mainly includes the following parts:

[0051] 1. Handling of raw materials;

[0052] The high-sulfur iron concentrate with a total iron grade of 66.70% and a sulfur grade of 1.41% is ground to -200 mesh, accounting for 76.5%, and then the ground product is concentrated to a pulp concentration of 41.1%.

[0053] 2. Activation of pyrrhotite;

[0054] The ore pulp that obtains with above-mentioned steps is as the raw material of flotation pyrrhotite, adopts the mixture of mass ratio 1:1 sodium phosphate and aluminum sulfate as the pH adjuster and the activator of pyrrhotite, the pH adjuster and the activator consumption are 2.0kg / t, stirred at natural temperature for 5min, and adjusted the pH value to 5.1.

[0055] 3. Rough separation of pyrrhotite;

[0056] The raw material obtained in the above steps is used as the flotation roughing raw material, and a mass ratio of 2:2:0.5 amyl xanthate sodium, ethyl...

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Abstract

The invention relates to a method for producing high-quality iron concentrate and sulfur concentrate from high sulfur iron concentrate, and belongs to the technical field of mineral engineering. Pyrrhotite contained in the high sulfur iron concentrate is prone to oxidization and argillization, sulfur in the iron concentrate is difficult to be decreased to 0.3% or below, and the recovery rate lossof the iron concentrate is large. By adopting appropriate ore grinding, most of pyrrhotite monomers can be dissociated, and moreover, argillization caused by excessive grinding can be avoided. Efficient and simple aluminum sulfate or a mixture of aluminum sulfate, sodium phosphate and ammonium fluosilicate is adopted to serve as an activating agent and a pH regulating agent for flotation of the pyrrhotite, a collecting agent good in selectivity and collecting performance is adopted, the surface of the pyrrhotite mineral is well activated, the charge state of the surface of mineral in pulp is well controlled, the high-quality iron concentrate which is high in grade and recovery rate is obtained, meanwhile, an agent combination of the efficient collecting agent and the regulating agent is applied to thrown pyrrhotite, and the first-grade sulfur concentrate is obtained.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a method for producing high-quality iron concentrate and sulfur concentrate from high-sulfur iron concentrate. Background technique [0002] The high content of high-sulfide iron concentrate has a serious impact on the quality of the iron concentrate. The sulfur-containing minerals in the iron concentrate not only pollute the atmosphere during the sintering process, but more lime must be added to ensure the desulfurization effect, resulting in an increase in the amount of slag and an increase in the coke ratio. It is easy to produce "hot crisp" during processing. Only by reducing the sulfur content of iron concentrate can the influence of sulfur on subsequent operations be eliminated and the grade of iron concentrate can be improved. The sulfur-containing mineral in iron concentrate is generally pyrrhotite, which is easier to oxidize than other sulfide mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/012B03D1/002B03D101/02B03D103/04
Inventor 云伟云文杰
Owner 内蒙古宏鉮科技发展有限责任公司
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