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Efficient desulfurizing bacreria and use method thereof in removal of sulfur in iron ore

A desulfurization bacteria and high-efficiency technology, applied in the field of removing sulfur in iron ore, can solve the problems of increased production cost, excessive consumption of coke limestone, etc., and achieve the effect of low production cost and low investment

Inactive Publication Date: 2015-07-01
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although blast furnace smelting can desulfurize, it consumes more coke (increase furnace temperature) and limestone (increase slag alkalinity), so that the production cost increases

Method used

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  • Efficient desulfurizing bacreria and use method thereof in removal of sulfur in iron ore
  • Efficient desulfurizing bacreria and use method thereof in removal of sulfur in iron ore
  • Efficient desulfurizing bacreria and use method thereof in removal of sulfur in iron ore

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Embodiment 1

[0029] The method of the present invention is applied to a certain iron ore in Inner Mongolia Autonomous Region, and the main element content of this iron ore is shown in Table 1

[0030] Table 1 Chemical multi-element analysis of an iron ore in Inner Mongolia Autonomous Region

[0031]

[0032] To desulfurize the above-mentioned ores, the technological process is as follows figure 1 As shown, it specifically includes the following steps:

[0033] 1. Crushing and fine grinding of ore

[0034] Crush the raw ore of sulfur-containing iron ore to less than 2mm, and then grind it to -0.074mm with a grinding machine, accounting for 65%;

[0035] 2. Preparation of pulp

[0036] Use tap water to make mineral powder into slurry, and the concentration of the slurry is 10%;

[0037] 3. Adjust pH and inoculate microorganisms

[0038] Use sulfuric acid with a concentration of 98% to adjust the pH of the pulp to 1.5, and inoculate high-efficiency desulfurization bacteria. The high-e...

Embodiment 2

[0043] The method of the present invention is applied to a certain iron ore in Hebei Province, and the main element content of this iron ore is shown in Table 2

[0044] Table 2 Chemical multi-element analysis of an iron ore in Hebei Province

[0045]

[0046] To desulfurize the above-mentioned ores, the technological process is as follows figure 1 As shown, it specifically includes the following steps:

[0047] 1. Crushing and fine grinding of ore

[0048] Crush the crude iron ore containing sulfur to less than 2mm, and then use a grinding machine to grind it to -0.074mm, accounting for 70%;

[0049] 2. Preparation of pulp

[0050] Use tap water to make mineral powder into slurry, and the concentration of the slurry is 15%;

[0051] 3. Adjust pH and inoculate microorganisms

[0052] Use 98% sulfuric acid to adjust the pH of the slurry to 1.8, and inoculate the high-efficiency desulfurization bacteria. The high-efficiency desulfurization bacteria are mixed bacteria of ...

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Abstract

The invention relates to efficient desulfurizing bacreria and use method thereof in removal of sulfur in iron ore, the desulfurizing bacreria is a mixed culture of acidithiobacillus ferrooxidans, leptospirillum ferriphilum and ferroplasma acidiphilum, the desulfurizing bacreria is preserved in China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC NO.8337. The method includes the following steps: (1) the sulfurous iron ore is broken and ground into ore powder; (2) the ore powder is prepared into ore pulp by use of water; (3) the ore pulp pH is adjusted to 1.0-3.5, the mixed bacteria liquid of the desulfurizing bacreria is inoculated; and (4) oxidation process temperature is controlled at 10 DEG C to 55 DEG C, and the period is 5-60 days. The efficient desulfurizing bacreria is suitable for the microbial oxidation desulfurization of various kinds of sulfurous iron ores, the investment is little, the production cost is low, and no waste gas and environment pollution are produced.

Description

technical field [0001] The invention relates to a method for removing sulfur in iron ore by using microorganisms, in particular to a high-efficiency desulfurization bacterium and a method for removing sulfur in iron ore. Background technique [0002] my country is rich in iron ore resources, but there are two characteristics: first, there are many lean ore resources, which account for 80% of the total; second, there are many compound ores with multi-element symbiosis. Among them, a considerable part of the iron ore contains sulfur, and the sulfur in the ore is mainly in the form of pyrite (FeS 2 ) exists, the sulfur part is reduced into pig iron during smelting, and the sulfur contained in steel is prone to "hot embrittlement" during thermal processing. Although blast furnace smelting can desulfurize, it consumes more coke (increasing furnace temperature) and limestone (increasing slag alkalinity), resulting in increased production costs. Therefore, desulfurization of iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C22B1/11C22B3/18C12R1/01
CPCY02P10/20
Inventor 尚鹤温建康武彪
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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