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Method for desulfurizing of iron ore concentrate

A technology for iron concentrate and pulp, applied in the field of metallurgy, can solve the problems of low removal rate, ineffective removal of particulate-level minerals, and needs to be improved, and achieves the effect of being environmentally friendly, solving the problem of excessive sulfur content and stable indicators.

Active Publication Date: 2018-07-24
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the flotation of fine-grained and fine-grained pyrrhotite is still activated by sulfuric acid or copper sulfate at home and abroad, and xanthate is used as a collector. The removal rate is low, especially the particulate minerals are often not effectively removed
[0004] Therefore, the existing iron concentrate desulfurization means still need to be improved

Method used

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  • Method for desulfurizing of iron ore concentrate
  • Method for desulfurizing of iron ore concentrate
  • Method for desulfurizing of iron ore concentrate

Examples

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Comparison scheme
Effect test

Embodiment 1

[0052] Containing 4.4% of S in the iron concentrate obtained from a certain copper mine in Anhui, the sulfur minerals are mainly pyrrhotite, adopt the iron concentrate desulfurization method of the present invention, and process it according to the following steps:

[0053] (1) Finely grinding the iron ore concentrate to obtain iron ore concentrate powder;

[0054] (2) mixing the iron ore concentrate powder with water to obtain a first slurry with a concentration of 38%;

[0055] (3) mixing the first pulp with sodium hexametaphosphate to obtain the second pulp; wherein the mass ratio of sodium hexametaphosphate to the first pulp is 2:10000;

[0056] (4) mixing the second pulp with sodium oleate and stirring for 5 to 10 minutes to obtain the third pulp; wherein the mass ratio of sodium oleate to the second pulp is 1:10000;

[0057] (5) Flotation treatment is carried out to the third pulp, and through primary roughing and secondary sweeping, the sulfur content in the iron conce...

Embodiment 2

[0059] Containing 3.6% of S in the iron concentrate gained from a certain iron mine in Hebei, the sulfur minerals are mainly pyrrhotite, adopt the iron concentrate desulfurization method of the present invention, and process it according to the following steps:

[0060] (1) Finely grinding the iron ore concentrate to obtain iron ore concentrate powder;

[0061] (2) mixing the iron ore concentrate powder with water to obtain a first slurry with a concentration of 40%;

[0062] (3) mixing the first pulp with sodium hexametaphosphate to obtain the second pulp; wherein the mass ratio of sodium hexametaphosphate to the first pulp is 1.5:10000;

[0063] (4) mixing the second pulp with sodium oleate and stirring for 5 to 10 minutes to obtain the third pulp; wherein the mass ratio of sodium oleate to the second pulp is 1.5:10000;

[0064] (5) Carry out flotation treatment to the third ore pulp, and through primary roughing and secondary sweeping, the sulfur content in the iron concen...

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Abstract

The invention discloses a method for desulfurizing of iron ore concentrate. The method comprises the following steps that 1, fine grinding is carried out on the iron ore concentrate so as to obtain iron ore concentrate powder; 2, the iron ore concentrate powder is mixed with water to obtain first ore pulp; 3, the first ore pulp is mixed with a dispersing agent to obtain second ore pulp; 4, the second ore pulp is mixed with a bridge-forming liquid so as to obtain third ore pulp; and 5, floatation treatment is carried out on the third ore pulp so as to obtain the desulfurized iron ore concentrate. According to the method, sulfur minerals in the iron ore concentrate can be effectively removed, the quality of the iron ore concentrate is improved, meanwhile, the method is environment-friendly,and operation is safe.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular, the invention relates to a method for desulfurizing iron concentrate. Background technique [0002] During the magnetic separation process of iron ore, some sulfur mineral impurities with strong magnetic properties (such as pyrrhotite) are easily mixed in the magnetically separated iron concentrate, which greatly reduces the quality of the iron concentrate. In the prior art, the flotation method is generally used to separate it from the iron ore concentrate, but it is difficult to remove fine-grained and fine-grained pyrrhotite in the traditional process, mainly for the following reasons: 1) in the magnetic separation process, Strong magnetic agglomeration is produced, and pyrrhotite is easy to be mixed in the magnetic iron concentrate; 2) pyrrhotite is easy to oxidize and muddy, making flotation more difficult; 3) the existing flotation method restricts fine-grained , Flotatio...

Claims

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Application Information

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IPC IPC(8): B03D1/014B03D103/02
CPCB03D1/014B03D2201/005B03D2203/02
Inventor 于传兵宋磊王传龙
Owner CHINA ENFI ENGINEERING CORPORATION
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