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Desulfur method of iron ore

A technology for iron concentrate and desulfurization bacteria, applied in the field of iron concentrate desulfurization, can solve problems such as unreported, and achieve the effects of high benefit, low pollution and low cost

Inactive Publication Date: 2006-04-12
SHANGHAI INST OF TECH +1
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

Microbial metallurgy technology is used in the desulfurization of pyrite in coal, but the method of microbial desulfurization of magnetite or magnetite concentrate has not been reported yet.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0014] The mixed bacterial water sample containing Thiobacillus ferrooxidans, Thiobacillus thiooxidans and other bacteria was taken from the acid mine water of a copper mine. After being separated and cultivated in the 9k medium, the 9k iron-free medium with a pH value of 2.0 was used for further subculture with sulfur powder as the energy source. The temperature of the biochemical incubator was set at 30 °C.

[0015] Add 10ml of mixed bacterial solution to 90ml of sterilized 9k sulfur powder medium, add vanadium-titanium magnetite concentrate to the bacterial solution to domesticate and cultivate the bacteria. During each acclimatization culture cycle carried out sequentially, the addition amount of vanadium-titanium magnetite concentrate was increased step by step. Use 5M sulfuric acid to control the pH value at about 2.0, and the acclimatization culture is carried out in a constant temperature water bath shaker with a rotation speed of 100-180r / min and a temperature of 30°...

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Abstract

A process for desulfurizing iron ore concentrate includes such steps as culturing the mixture of thiobacillus ferro oxidans and thiobacillus sulfur oxidans in the non-Fe culture medium containing sulfur powder as energy source, adding the high-S iron ore concentrate containing pyrrhotite, naturalizing culture to obtain desulfurizing bacteria, putting them in water, immersing said high-S iron ore concentrate in it, vibrating in shaker for desulfurizing, washing and drying.

Description

technical field [0001] The invention relates to a primary treatment method of ore or waste, more specifically to a desulfurization method of iron concentrate. Background technique [0002] Magnetite is an important mineral raw material for iron and steel smelting. Due to the needs of production technology and steel quality, the requirements for the sulfur content of magnetite are very strict. At present, the commonly used desulfurization methods include magnetic separation and flotation. There are widely distributed skarn-type iron deposits in China, and most of the useful iron minerals are magnetite, among which sulfur-containing minerals are mainly pyrite and pyrrhotite. This kind of magnetite ore can easily obtain high-grade iron concentrate through magnetic separation. However, due to the close symbiosis of magnetite and pyrrhotite, pyrrhotite is brittle, easy to muddy, easy to oxidize, and has relatively low floatability. Poor, easy to be suppressed and difficult to fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 刘晓荣廖代华王晶何绍刚陈建斌孙亚琴胡继业
Owner SHANGHAI INST OF TECH
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