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

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...

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.