CN105779761A - Method for desulfurating high-sulfur iron ores by using low-temperature efficient sulfur-oxidizing bacterium - Google Patents
Method for desulfurating high-sulfur iron ores by using low-temperature efficient sulfur-oxidizing bacterium Download PDFInfo
- Publication number
- CN105779761A CN105779761A CN201410818401.8A CN201410818401A CN105779761A CN 105779761 A CN105779761 A CN 105779761A CN 201410818401 A CN201410818401 A CN 201410818401A CN 105779761 A CN105779761 A CN 105779761A
- Authority
- CN
- China
- Prior art keywords
- sulfur
- low
- ores
- bacterium
- iron ores
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Paper (AREA)
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
The present invention relates to microorganism ecology technical field, be specifically related to a kind of utilize microorganism remove containing the method for sulfur in troilite, particularly relate to a kind of method that efficient cryogenic sulfur oxidizing bacterium carries out high sulfide pyrite desulfurization.
Background technology
China is one of a few countries that iron mineral resource total amount is abundant, mineral degree complete, supporting is higher in the world, also it is develop iron mineral resource history Mining Market big country the longest and consumption big country, quantitatively have superiority at iron ore, but Iron grade is low, and the objectionable impurities content such as sulfur, phosphorus and silicon dioxide are high, disseminated grain size is thin, cause and select that smelting difficulty is big, efficiency is low, quality and variety is in a disadvantageous position, especially in iron ore concentrate, sulfur content exceeds standard, and lacks competitiveness in the international market.In recent years, environmental requirement is improved constantly by country, and effectively the sulfur removed in iron ore becomes urgent scientific research mission, and the research development to Chinese national economy of develop and useining containing sulphur iron ore has very important important function.Day by day tend to exhausted today in resource, develop emphasis and developing direction that efficient new desulfurization process technology is sulfur-bearing Iron Mine smelting research.In recent years in containing sulphur iron ore desulfurization, Chinese scholars has done substantial amounts of research, no matter it is technological process, process optimization or has substantial amounts of bibliographical information in theory, research in microorganism wet method removing sulfuldioxide is achieved with good progress at present, this technique has the features such as low, the environmental friendliness of cost, is with a wide range of applications.But iron ore is positioned at remote mountain areas mostly, and weather conditions are poor, how to be still, compared with fast eliminating sulfur under low condition, the technical barrier needing solution badly in temperature.
Summary of the invention
The correlation technique difficult problems such as a kind of method that it is an object of the invention to provide high sulfide pyrite efficient cryogenic desulfurization, solution low temperature season and extremely frigid zones wet desulphurization speed containing sulphur iron ore are slow, it is achieved the efficient removal of inorganic sulfur in iron ore.
For achieving the above object, the present invention is by the following technical solutions:
The present invention provides a kind of method containing troilite high-efficiency desulfurization, and the method comprises the following steps:
1) by ore grinding to below-0.074mm, add to and water is configured to the solution that pulp density is 3-5wt%；
2) sulphuric acid adopting concentration to be 20% carries out acid balance, makes pH value in ore pulp be adjusted to 1.5-2.0；
3) by antibacterial culturing in 9K culture medium, it is cultured to bacterial concentration >=1.0 × 108Individual/mL；
4) then inoculated bacteria, control sulfur oxidation system reaction temperature, and the oxidation when rotating speed is 150-180rpm.
Antibacterial described in method is efficient cryogenic sulfur oxidizing bacterium, its bacterium classification title: sulfur oxidizing acid sulfur bacillus (Acidithiobacillusthiooxidans) RetechDW-II, depositary institution: China Committee for Culture Collection of Microorganisms's common micro-organisms center, address is: Yard 1, BeiChen xi Road, Chaoyang District, Beijing City 3, Institute of Microorganism, Academia Sinica, preservation date: on JIUYUE 10th, 2014, deposit number: CGMCCNo.9625.
Further, method step 1) described in pulp density be 4%.
Further, method step 2) described in adopt the sulphuric acid of 20% to carry out time of acid balance be 12-24h.
Further, step 2) in after acid balance described slurry pH be 1.8.
Further, method step 4) described in the microbionation concentration that accesses in ore pulp of antibacterial be 10-15%, after inoculation, in solution, bacterial concentration is 1.0 × 107-5.0×107Individual/mL.
Further, method step 4) described in sulfur oxidation system reaction temperature be 15-20 DEG C, oxidization time is 15-20d.
Further, method step 4) described rotating speed is 160rpm.
9K culture medium involved in the present invention is: (NH4)2SO43.0g；KCl0.10g；K2HPO40.50g；MgSO4.7H2O0.50g；Ca(NO3)20.01g；FeSO4.7H2O44.40g and distilled water 1000.00mL.
The cultural method of efficient cryogenic sulfur oxidizing bacterium is:
By antibacterial culturing in 9K culture medium, pH value is adjusted to 1.8 by the sulphuric acid of 20%, and temperature is 25-40 DEG C, cultivates 10-15d in an oscillator, gathers in the crops bacterial concentration >=1.0 × 108Individual/mL.
The beneficial effects of the present invention is:
The present invention provides a kind of method containing troilite high-efficiency desulfurization, is by adding efficient cryogenic sulfur oxidizing bacterium, improves temperature compared with the oxidation rate of sulfur under low condition, solve the correlation technique difficult problems such as low temperature season and the extremely frigid zones wet desulphurization speed containing sulphur iron ore is slow.The enforcement of the method can effectively improve rate of cure, shortens the sulfur elimination cycle.Use it is shown that inorganic sulfur removal efficiency reaches more than 85% in iron ore.
The inventive method has that flow process is short, equipment is simple, cost is low, energy consumption is low, environmental friendliness, the advantages such as production scale is changeable, can process tradition dressing and smelting process be difficult to economic recovery containing troilite, the low-grade synthetical recovery level containing ferro-sulphur ore can be improved, there is quite wide application prospect.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, but should not be limited by the examples.
Embodiment 1:
The iron mine adopted in embodiment is that Inner Mongol is containing troilite, sulfur content in iron ore height.Wherein, sulfur mainly exists with troilite form, and organic sulfur content is very low, and also less with the sulfur that sulphate form exists, concrete multielement analysis and sulfur thing phase result are in Table 1 and table 2.
Table 1 iron mine multielement analysis result
| Element | Fe | Cu | Pb | Zn | Mn |
| Content/% | 54.15 | 0.010 | 0.0020 | 0.0015 | 0.019 |
| Element | S | Ca | Mg | SiO2 | Al2O3 |
| Content/% | 3.35 | 0.17 | 0.14 | 6.32 | 0.39 |
Sulphur content composition in table 2 iron mine
| Full sulfur | Troilite sulfur | Organic sulfur | Sulfate sulfur | |
| Content/wt% | 3.35 | 3.13 | 0.12 | 0.10 |
By ore grinding to below-0.074mm, adding to and be configured to the solution that pulp density is 4% in water, the sulphuric acid adopting concentration to be 20% carries out acid balance, makes pH stable reach 24h about 1.8.Then accessing in ore pulp by the efficient cryogenic sulfur oxidizing bacterium RetechDW-II containing 9K culture medium, microbionation concentration is 15%, and after inoculation, in solution, bacterial concentration is 3.0 × 107Individual/mL, after inoculation, solution ph is 1.75, and oxidation-reduction potential is 650mV.Design temperature is 18 DEG C, and agitator rotating speed is 160rpm.Detect the change of the pH value in solution and oxidation-reduction potential, oxidation cycle 20d every day.Slag is filtered after terminating by oxidation, and washes 2-3 time with clear water, slag dries rear sample presentation and surveys the content of sulfur, result table 3 in iron mine.
Table 3 desulfurization results analysis
| Fe content/wt% | S content/wt% | Slag rate/wt% | Sulfur removal rate/wt% |
| 58.15 | 0.48 | 93% | 86.68 |
It is shown that oxidation 20d, total sulfur removal rate is 86.68%.
Embodiment 2:
In embodiment adopt iron mine be outer illiteracy containing troilite, sulfur content in iron ore is higher.Wherein, sulfur mainly exists with troilite form, and the sulfur content that organic sulfur and sulphate form exist is relatively low, and concrete multielement analysis and sulfur thing phase result are in Table 4 and table 5.
Table 4 iron mine multielement analysis result
| Element | Fe | Cu | Pb | Zn | Mn |
| Content/% | 55.21 | 0.0085 | 0.0028 | 0.0035 | 0.014 |
| Element | S | Ca | Mg | SiO2 | Al2O3 |
| Content/% | 2.98 | 0.11 | 0.12 | 6.18 | 0.43 |
Sulphur content composition in table 5 iron mine
| Full sulfur | Troilite sulfur | Organic sulfur | Sulfate sulfur | |
| Content/wt% | 2.98 | 2.67 | 0.18 | 0.13 |
By ore grinding to below-0.074mm, adding to and be configured to the solution that pulp density is 4% in water, the sulphuric acid adopting concentration to be 20% carries out acid balance, makes pH stable reach 24h about 1.8.Then accessing in ore pulp by the efficient cryogenic sulfur oxidizing bacterium RetechDW-II containing 9K culture medium, microbionation concentration is 15%, and after inoculation, in solution, bacterial concentration antibacterial is 3.0 × 107Individual/mL, after inoculation, solution ph is 1.75, and oxidation-reduction potential is 670mV.Design temperature is 15 DEG C, and agitator rotating speed is 160rpm.Detect the change of the pH value in solution and oxidation-reduction potential, oxidation cycle 15d every day.Slag is filtered after terminating by oxidation, and washes 2-3 time with clear water, slag dries rear sample presentation and surveys the content of sulfur, result table 6 in iron mine.
Table 6 desulfurization results analysis
| Fe content/wt% | S content/wt% | Slag rate/wt% | Sulfur removal rate/wt% |
| 58.68 | 0.38 | 94% | 88.02 |
It is shown that oxidation 15d, total sulfur removal rate is 88.02%.
By above example it can be seen that by adding efficient cryogenic sulfur oxidizing bacterium, improve the oxidation rate of (15-20 DEG C) sulfur under temperature relatively low condition, solve the correlation technique difficult problems such as low temperature season and the extremely frigid zones wet desulphurization speed containing sulphur iron ore is slow.The enforcement of the method can effectively improve rate of cure, shortens the sulfur elimination cycle.It is shown that inorganic sulfur removal efficiency all reaches more than 85% in different iron ores.
Claims (8)
1. the method containing troilite high-efficiency desulfurization, it is characterised in that the method comprises the following steps:
1) by ore grinding to below-0.074mm, add to and water is configured to the solution that pulp density is 3-5wt%；
2) sulphuric acid adopting concentration to be 20% carries out acid balance, makes pH value in ore pulp be adjusted to 1.5-2.0；
3) by antibacterial culturing in 9K culture medium, it is cultured to bacterial concentration >=1.0 × 108Individual/mL；
4) then inoculated bacteria, control sulfur oxidation system reaction temperature, and the oxidation when rotating speed is 150-180rpm.
2. the method for claim 1, it is characterized in that, described antibacterial is efficient cryogenic sulfur oxidizing bacterium, its bacterium classification name is called: sulfur oxidizing acid sulfur bacillus (Acidithiobacillusthiooxidans) RetechDW-II, depositary institution: China Committee for Culture Collection of Microorganisms's common micro-organisms center, address is: Yard 1, BeiChen xi Road, Chaoyang District, Beijing City 3, Institute of Microorganism, Academia Sinica, preservation date: on JIUYUE 10th, 2014, deposit number: CGMCCNo.9625.
3. method as claimed in claim 1 or 2, it is characterised in that step 1) described in pulp density be 4%.
4. method as claimed in claim 1 or 2, it is characterised in that step 2) described in adopt the time that the sulphuric acid of 20% carries out acid balance be 12-24h.
5. method as claimed in claim 1 or 2, it is characterised in that step 2) in after acid balance described slurry pH be 1.8.
6. method as claimed in claim 1 or 2, it is characterised in that step 4) described in the microbionation concentration that accesses in ore pulp of antibacterial be 10-15%, after inoculation, in solution, bacterial concentration is 1.0 × 107-5.0×107Individual/mL.
7. method as claimed in claim 1 or 2, it is characterised in that step 4) described in sulfur oxidation system reaction temperature be 15-20 DEG C, oxidization time is 15-20d.
8. method as claimed in claim 1 or 2, it is characterised in that step 4) described rotating speed is 160rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410818401.8A CN105779761B (en) | 2014-12-24 | 2014-12-24 | A kind of method that high sulfide pyrite desulfurization is carried out with efficient cryogenic sulfur oxidizing bacterium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410818401.8A CN105779761B (en) | 2014-12-24 | 2014-12-24 | A kind of method that high sulfide pyrite desulfurization is carried out with efficient cryogenic sulfur oxidizing bacterium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105779761A true CN105779761A (en) | 2016-07-20 |
| CN105779761B CN105779761B (en) | 2018-02-23 |
Family
ID=56377585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410818401.8A Active CN105779761B (en) | 2014-12-24 | 2014-12-24 | A kind of method that high sulfide pyrite desulfurization is carried out with efficient cryogenic sulfur oxidizing bacterium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105779761B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1757769A (en) * | 2005-10-25 | 2006-04-12 | 上海应用技术学院 | Desulfur method of iron ore |
| CN101538540A (en) * | 2008-03-21 | 2009-09-23 | 中国黄金集团公司技术中心 | Composite mineral-leaching bacteria colony and use of same in biological metallurgy |
| US20100180729A1 (en) * | 2005-08-17 | 2010-07-22 | Biosigma S.A. | Sulfur-oxidizing bacteria and their use in bioleaching processes for sulfured copper minerals |
| CN102179167A (en) * | 2011-04-22 | 2011-09-14 | 天津工业生物技术研究所 | Microbial flue gas desulfurizer |
| CN103396964A (en) * | 2013-08-01 | 2013-11-20 | 中南大学 | Compound bacterium community capable of efficiently leaching sulphide ore, and compounding method and application method thereof |
-
2014
- 2014-12-24 CN CN201410818401.8A patent/CN105779761B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100180729A1 (en) * | 2005-08-17 | 2010-07-22 | Biosigma S.A. | Sulfur-oxidizing bacteria and their use in bioleaching processes for sulfured copper minerals |
| CN1757769A (en) * | 2005-10-25 | 2006-04-12 | 上海应用技术学院 | Desulfur method of iron ore |
| CN101538540A (en) * | 2008-03-21 | 2009-09-23 | 中国黄金集团公司技术中心 | Composite mineral-leaching bacteria colony and use of same in biological metallurgy |
| CN102179167A (en) * | 2011-04-22 | 2011-09-14 | 天津工业生物技术研究所 | Microbial flue gas desulfurizer |
| CN103396964A (en) * | 2013-08-01 | 2013-11-20 | 中南大学 | Compound bacterium community capable of efficiently leaching sulphide ore, and compounding method and application method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105779761B (en) | 2018-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zeng et al. | Effective bioleaching of chromium in tannery sludge with an enriched sulfur-oxidizing bacterial community | |
| CN106268259B (en) | SO in a kind of flue gas2With the method for Hg biochemical synchronizations removing | |
| CN102260568A (en) | Combined microbial desulfurization method and process of coal | |
| CN103013847B (en) | Ammonia-producing mineral leaching bacterium as well as culture method and application of ammonia-producing mineral leaching bacterium | |
| CN109182192A (en) | One plant of aerobic denitrifying bacteria HY3-2 and its application in sewage water denitrification | |
| CN104745497B (en) | A kind of technique for carrying out high sulfur coal mine biological desulphurization using exclusive desulfurization Mixed Microbes | |
| CN103031434B (en) | Refractory gold ore desulfurizing and dearsenifying method | |
| CN105483110B (en) | Fe3O4Magnetic nano particle immobilized sulfur-alkali vibrio and its desulfurizing process | |
| CN110052099A (en) | A kind of method of sulfur-containing smoke gas biochemical de-sulfur and sulphur recovery | |
| CN103014336B (en) | Preparation and method for treating high-arsenic and high-sulfur gold ore | |
| CN113736717A (en) | Methane oxidizing bacterium with denitrification function and anoxia resistance and application thereof | |
| CN104745495A (en) | Efficient desulfurizing bacreria and use method thereof in removal of sulfur in iron ore | |
| CN107118982A (en) | A kind of Thiobacillus ferrooxidans and its application | |
| CN105400719B (en) | One plant of greedy copper Pseudomonas bacterial strain that can convert heavy metal and its application | |
| Mousavi et al. | Influence of process variables on biooxidation of ferrous sulfate by an indigenous Acidithiobacillus ferrooxidans. Part II: Bioreactor experiments | |
| CN106636635B (en) | A kind of iron ore biological dump leaching sulfur removal technology | |
| CN105779761A (en) | Method for desulfurating high-sulfur iron ores by using low-temperature efficient sulfur-oxidizing bacterium | |
| CN107760866B (en) | Method for strengthening bacterial leaching of molybdenite with nonionic surfactant | |
| Feng et al. | Simultaneous denitrification and desulfurization-S0 recovery of wastewater in trickling filters by bioaugmentation intervention based on avoiding collapse critical points | |
| CN103571781A (en) | Acidithiobacillus caldus gene engineering strain and applications thereof | |
| CN106635210A (en) | Method for removing hydrogen sulfide in methane by acidithiobacillus caldus | |
| CN108148771A (en) | Low temperature fluorine-resistant ore leaching bacteria and its bioleaching process for fluorine-containing uranium ore | |
| CN106521152B (en) | A kind of method of vanadium-containing shale bacterial desulfurization | |
| CN104923069A (en) | Microbial active filler containing paenibacillus sp., and application thereof | |
| CN106833797B (en) | Process for desulfurization of high-sulfur coal mine by segmented biological heap leaching |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190111 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210401 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Youyan resources and Environment Technology Research Institute (Beijing) Co.,Ltd. Address before: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee before: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |