A method for desulfurizing high-sulfur iron ore with low-temperature and high-efficiency sulfur-oxidizing bacteria

A sulfur-oxidizing bacteria and high-efficiency technology, which is applied in the direction of improving process efficiency, can solve problems such as poor climate conditions, and achieve the effects of increasing the vulcanization rate, being environmentally friendly, and shortening the sulfur removal cycle

Active Publication Date: 2018-02-23
有研资源环境技术研究院(北京)有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, iron ore is mostly located in remote mountainous areas with poor climate conditions. How to quickly remove sulfur under low temperature conditions is still a technical problem that needs to be solved urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The iron ore used in the embodiment is a certain sulfur-containing iron ore in Inner Mongolia, and the sulfur content in the iron ore is high. Among them, sulfur mainly exists in the form of pyrite, the content of organic sulfur is very low, and the sulfur in the form of sulfate is also less. The specific multi-element analysis and sulfur phase results are shown in Table 1 and Table 2.

[0026] Table 1 The results of multi-element analysis of iron ore

[0027] element

[0028] Table 2 Composition of sulfur in iron ore

[0029]

[0030] Crush the ore to below -0.074mm, add it into water to form a solution with a pulp concentration of 4%, use sulfuric acid with a concentration of 20% for acid balance, and stabilize the pH value at about 1.8 for 24 hours. Then the low-temperature high-efficiency sulfur-oxidizing bacteria Retech DW-Ⅱ containing 9K medium was inserted into the ore slurry, the bacterial inoculation concentration was 15%, and the bacterial...

Embodiment 2

[0035] The iron ore used in the embodiment is a certain sulfur-containing iron ore in Outer Mongolia, and the sulfur content in the iron ore is relatively high. Among them, sulfur mainly exists in the form of pyrite, and the sulfur content in the form of organic sulfur and sulfate is relatively low. The specific multi-element analysis and sulfur phase results are shown in Table 4 and Table 5.

[0036] Table 4 Iron ore multi-element analysis results

[0037] element

Fe

Cu

Pb

Zn

mn

content / %

55.21

0.0085

0.0028

0.0035

0.014

element

S

Ca

Mg

SiO 2

Al 2 o 3

content / %

2.98

0.11

0.12

6.18

0.43

[0038] Table 5 Composition of sulfur in iron ore

[0039]

Total sulfur

pyrite sulfur

organic sulfur

sulfate sulfur

Content / wt%

2.98

2.67

0.18

0.13

[0040] Crush the ore to below -0.074mm, add it into water to form a solution with a p...

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PUM

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Abstract

The invention discloses a low-temperature efficient sulfur-oxidizing bacterium. The name of the bacterium is acidithiobacillus thiooxidans Retech DW-II; the preservation institution is General Microbe Center of China Committee for Culture Collection of Microorganisms; the address is Institute of Microbiology of Chinese Academy of Sciences, No.3, Yard 1, West Beichen Road, Chaoyang District, Beijing; the preservation date is September 10, 2014; the preservation number is CGMCC No.9625. The invention also provides a method for efficiently desulfurating high-sulfur iron ores. The method comprises the following steps of crushing ores until the size of the ores is -0.074mm, adding the low-temperature efficient sulfur-oxidizing bacterium CGMCC No.9625, accelerating the oxidizing rate of sulfur in the iron ores at the low temperature, and enabling the removal rate of the inorganic sulfur in the iron ores to be greater than or equal to 85%. The method is low in investment, low in production cost, free of emission of SO2 gas and free of pollution to the environment, has the advantage of low iron loss rate, and provides technical support for large-scale development of the sulfur-containing iron ores.

Description

technical field [0001] The invention relates to the technical field of microbial hydrometallurgy, in particular to a method for removing sulfur from sulfur-containing iron ore by using microorganisms, in particular to a method for desulfurizing high-sulfur iron ore by using low-temperature and high-efficiency sulfur-oxidizing bacteria. Background technique [0002] my country is one of the few countries in the world with abundant iron ore resources, a complete range of minerals, and a high degree of supporting facilities. It is also a major mining producer and consumer with the longest history of developing and utilizing iron ore resources. It has advantages, but the grade of iron is low, and the content of harmful impurities such as sulfur, phosphorus and silicon dioxide is high, and the embedded particle size is fine, resulting in difficult dressing and smelting, low efficiency, and a disadvantage in quality and variety, especially sulfur in iron concentrate The content exce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 武彪温建康尚鹤武名麟
Owner 有研资源环境技术研究院(北京)有限公司
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