Method for removing pyrrhotite from high-sulfur iron ore concentrate

A high-sulfur iron concentrate and pyrrhotite technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve problems such as poor separation effect and loss of iron concentrate recovery rate, and achieve saving Grinding cost, solving separation problem, effect of high recovery rate

Active Publication Date: 2018-06-01
内蒙古薪宝高科技开发有限公司
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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 More losses, below 88%

Method used

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  • Method for removing pyrrhotite from high-sulfur iron ore concentrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for removing pyrrhotite from high-sulfur iron concentrate mainly includes the following parts:

[0021] 1. Handling of raw materials;

[0022] 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%.

[0023] 2. Activation of pyrrhotite;

[0024] 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.

[0025] 3. Rough separation of pyrrhotite;

[0026] 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

[0031] A method for removing pyrrhotite from high-sulfur iron concentrate mainly includes the following parts:

[0032] 1. Handling of raw materials;

[0033] 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%.

[0034] 2. Activation of pyrrhotite;

[0035] 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. The amount of pH regulator and activator is 4kg / t, and it is stirred at natural temperature for 6min , adjust the pH value to 4.6.

[0036] 3. Rough separation of pyrrhotite;

[0037] 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 xanthate sodium, ethyl xanthate sodium and butyl sodium black medicine is adde...

Embodiment 3

[0042] A method for removing pyrrhotite from high-sulfur iron concentrate mainly includes the following parts:

[0043] 1. Handling of raw materials;

[0044] 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%.

[0045] 2. Activation of pyrrhotite;

[0046]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.

[0047] 3. Rough separation of pyrrhotite;

[0048] 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 removing pyrrhotite from high-sulfur iron ore concentrate and belongs to the technical field of mineral engineering. The sulfur content of high-sulfur iron ore concentrate is higher to seriously affect the quality of the iron ore concentrate. Pyrrhotite is likely to have oxidation and argillization, and the oxidization degrees are different, so that the sulfurcontent in the iron ore concentrate is difficult to be reduced below 0.3%, and the recovery rate loss of the iron ore concentrate is larger. According to the method, through proper ore grinding, mostof monomers of pyrrhotite are separated and are prevented from excessively grinding to avoid argillization. Efficient and feasible aluminum sulfate or the mixture of aluminum sulfate, sodium phosphate and ammonium fluosilicate is adopted as an activator and a pH regulator of pyrrhotite, and a collecting agent with better selectivity and collecting performance is adopted to activate the mineral surface of pyrrhotite, and the electrical charge state of the surface of mineral in ore pulp is better controlled, so that magnetite and pyrrhotite are effectively separated and high-quality iron ore concentrate with high grade and high recovery rate and rough concentrate of pyrrhotite are obtained.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a method for removing pyrrhotite from high-sulfur iron concentrate. Background technique [0002] The sulfur content of high-sulfur iron concentrate is relatively high, generally above 2%, which seriously affects the quality of 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 minerals...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/002B03D101/00B03D101/02B03D103/02
Inventor 云伟云文杰
Owner 内蒙古薪宝高科技开发有限公司
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