CN100424202C - Dephosphorization method of phosphorus-containing iron ore - Google Patents
Dephosphorization method of phosphorus-containing iron ore Download PDFInfo
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- CN100424202C CN100424202C CNB2007100348448A CN200710034844A CN100424202C CN 100424202 C CN100424202 C CN 100424202C CN B2007100348448 A CNB2007100348448 A CN B2007100348448A CN 200710034844 A CN200710034844 A CN 200710034844A CN 100424202 C CN100424202 C CN 100424202C
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- iron ore
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- phosphorus
- dephosphorization
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Abstract
A method for dephosphorizing from phosphor-containing iron ore is disclosed, wherein phosphor-containing iron ore is broken to the granularity of less than 0.074mm and mixed with iron pyrite prebroken to the granularity of less than 0.074mm based on mass percent of 5%-20%, the mass concentration of ore slurry is adjusted to 10%-20% by the aphosphorosis 9K culture and pH of original ore slurry is in the range of 1.5 to 3.5, then noculating ferrous and sulfur oxide bacilli lysate of 2% -10% mass percent in which bacteria is cultrued by 9K culture beforehand ro reach exponential phase of growth in ore slurry, extracting dephosphorization, solid-liquid separation after 30 -45 days, and the solid is iron ore concentrate. The invention is suitable for direct-extracting dephosphorizing from each phosphor-containing iron ore microbe, the ore dephosphorizing yield can be exceeded 80%, The content of phosphorus satisfies the requirement of blast furnace ironmaking materials, and having comprehensive utilization of iron pyrite. The process provides a reliable technical support for developing rich high phosphorus iron ore in our country with low cost and good dephosphorization.
Description
Technical field
The present invention relates to a kind of method of phosphorus-containing iron ore dephosphorization, particularly relate to a kind of method of utilizing thiobacillus ferrooxidant (T.f bacterium) directly to leach the phosphorus-containing iron ore dephosphorization.
Background technology
Along with the development of Iron And Steel Industry, the iron ore deposit of rich ore that China is limited and easily choosing is petered out, and it is poor, thin, assorted that available iron ore deposit is tending towards day by day.A large amount of phosphorus-containing iron ores are all stored in Hunan, area, Hubei Province, the Yangtze valley in China.Because phosphorus can cause steel to produce " cold short ", therefore low phosphorus content is an important quality index of iron ore.Cleveland Cleffs Inc mover iron concentrate is phosphorous should to be lower than 0.024%, and domestic then is 0.05%～0.30% to the basic demand of iron ore concentrate phosphorated, and increasingly stringent.Therefore, research iron ore dephosphorization is to improving domestic iron ore quality and promoting the sustainable development of China's Iron And Steel Industry to have important practical significance.
In recent years, the iron ore dephosphorization technology has been carried out comparatively extensive studies both at home and abroad.Mainly contain acidleach, alkali soaks and magnetic separation, flotation process etc., but because these methods exist dephosphorization rate low mostly, or the leaching agent consumption is big, reasons such as cost height, its application is restricted.
Outstanding advantages such as the biological metallurgy technology is low with its cost, environmental friendliness are considered to one of engineering of tool development prospect of 21 century.For example, utilize thiobacillus ferrooxidant to handle some sulphide ores direct extraction of metal and obtained industrial application, and obtained huge economic benefit.But aspect the phosphorus-containing iron ore dephosphorization, the research of biological dephosphorization that is seen in report both at home and abroad is quite few.Someone has studied and has utilized thiobacillus ferrooxidant pre-oxidation pyrite, utilizes its acid waste water that produces (pH is 0.8) to leach high-phosphorus iron ore.Though, adopt this method to obtain the good results of dephosphorization rate 76.89%, be still the acidleach dephosphorization in essence, be not to utilize directly dephosphorization from ore of microorganism.In addition, this method adopts the two-stage process dephosphorization, and flow process is longer.
The somebody adopts thiobacillus that the iron ore dephosphorization is studied, and the principle of its dephosphorization is to utilize the sulfide and the thiobacillus effect that contain in the ore to produce sour dephosphorization.But this method dephosphorization effect is relatively poor, and under molten phosphorus agent synergy, its dephosphorization rate only reaches about 42%.
For enhanced biological leaches dephosphorizing process, shortened process improves and leaches dephosphorization rate, and for the development and use of the abundant high-phosphorus iron ore of China's reserves provide new technical support, the spy proposes the present invention.
Summary of the invention
Technical problem to be solved by this invention provides that a kind of technical process is short, the dephosphorization effect method of phosphorus-containing iron ore dephosphorization preferably.
In order to solve the problems of the technologies described above, the method of phosphorus-containing iron ore dephosphorization provided by the invention, phosphorus-containing iron ore is crushed to granularity less than 0.074mm, with be crushed to granularity in advance less than the pyrite of 0.074mm 5%～20% mixing by mass percentage, (lacking phosphorus 9K substratum consists of: (NH with scarce phosphorus 9K substratum
4)
2SO
43.0g/L, KCl 0.1g/L, FeSO
4.7H
2O 44.2g/L, MgSO
47H
2O 0.5g/L, Ca (NO
3)
20.01g/L) regulate that the ore pulp mass concentration is 10%～20%, initial pH values of pulp is in 1.5～3.5 scope, inoculating 2%～10% then in ore pulp by mass percentage makes bacterium reach the thiobacillus ferrooxidant bacterium liquid of exponential phase of growth with the 9K culture medium culturing in advance, leach dephosphorization, carry out liquid-solid separation after 30～45 days, the gained solid phase prod is an iron ore concentrate.
Adopt the method for the phosphorus-containing iron ore dephosphorization of technique scheme, the principle of utilizing thiobacillus ferrooxidant (T.f bacterium) to leach dephosphorization is: one, bacterium constitutes cellular component and carries out energy metabolism by the P that absorbs in the ore, organic acid and insoluble phosphate effect that metabolism produces make the phosphorus dissolving enter liquid phase; Two, utilize the sulfuric acid that redox state sulphur is produced in the bacterial metabolism process, phosphorus ore thing in the dissolving ore makes phosphorus enter liquid phase; Three, the ferrous generation ferric ion of bacterial oxidation Fe
3+After, utilize Fe
3+Hydrolysis produces sour dissolved phosphorus mineral.
Advantage of the present invention mainly is: the microorganism that is applicable to various phosphorus-containing iron ores is directly leached dephosphorization; With the nutrition source of pyrite as bacterium, both made full use of a direct and sour dissolved phosphorus mineral of practicing midwifery in the bacterial oxidation pyrite process, fully utilize pyrite again; The dephosphorization cost is low, dephosphorization effect good, adopts the present invention that dephosphorization rate is reached more than 80%, and the iron ore concentrate of acquisition reaches the requirement of blast furnace ironmaking raw material to phosphorus content.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
Embodiment 1, referring to accompanying drawing, with phosphorous be that 1.12% iron ore is crushed to granularity less than 0.074mm, in phosphorus-containing iron ore, add the pyrite of 10% granularity by mass percentage less than 0.074mm, regulate ore pulp mass concentration to 10% with scarce phosphorus 9K culture medium solution, add 5% thiobacillus ferrooxidant (T.f bacterium) bacterium liquid by mass percentage, initial pH values of pulp is 2.2, leach under 35 days the condition, dephosphorization rate reaches 68.81%; When pyrite content brought up to 20%, dephosphorization rate was 78.84%.
Embodiment 2, referring to accompanying drawing, with phosphorous be that 1.12% iron ore is crushed to granularity less than 0.074mm, in phosphorus-containing iron ore, add the pyrite of 20% granularity by mass percentage less than 0.074mm, regulate ore pulp mass concentration to 15% with scarce phosphorus 9K culture medium solution, add 5% T.f bacterium bacterium liquid by mass percentage, initial pH values of pulp is respectively 1.7 and at 2.0 o'clock, leach under 45 days the condition, dephosphorization rate reaches 86.68% and 86.63% respectively; When pH was lower than 1.5, bacterium was difficult to survive; When pH was 3.5, dephosphorization rate reduced to 78%.
Embodiment 3, referring to accompanying drawing, with phosphorous be that 1.12% iron ore is crushed to granularity less than 0.074mm, in phosphorus-containing iron ore, add the pyrite of 20% granularity by mass percentage less than 0.074mm, regulate ore pulp mass concentration to 20% with scarce phosphorus 9K culture medium solution, initial pH values of pulp is 2.2, leaches under 45 days the condition, when T.f bacterium bacterium liquid inoculum size by mass percentage when 2% increases to 5%, dephosphorization rate increases to 78.84% from 67.70%; And when T.f bacterium bacterium liquid inoculum size when 5% increases to 10%, the ore dephosphorization rate only increases to 79.95% from 78.84%.
Embodiment 4, referring to accompanying drawing, with phosphorous be that 1.52% iron ore is crushed to granularity less than 0.074mm, in phosphorus-containing iron ore, add the pyrite of 20% granularity by mass percentage less than 0.074mm, T.f bacterium bacterium liquid inoculum size is 8% by mass percentage, regulates ore pulp mass concentration to 15% with lacking phosphorus 9K culture medium solution, and initial pH values of pulp is 1.8, leach under 45 days the condition, dephosphorization rate reaches 85.43%.
Claims (1)
1. the method for a phosphorus-containing iron ore dephosphorization, it is characterized in that: phosphorus-containing iron ore is crushed to granularity less than 0.074mm, with be crushed to granularity in advance less than the pyrite of 0.074mm 5%～20% mixing by mass percentage, regulating the ore pulp mass concentration with scarce phosphorus 9K substratum is 10%～20%, initial pH values of pulp is in 1.5～3.5 scope, inoculating 2%～10% then in ore pulp by mass percentage makes bacterium reach the thiobacillus ferrooxidant bacterium liquid of exponential phase of growth with the 9K culture medium culturing in advance, leach dephosphorization, carry out liquid-solid separation after 30～45 days, the gained solid phase prod is an iron ore concentrate.
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| CNB2007100348448A CN100424202C (en) | 2007-04-28 | 2007-04-28 | Dephosphorization method of phosphorus-containing iron ore |
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| CNB2007100348448A CN100424202C (en) | 2007-04-28 | 2007-04-28 | Dephosphorization method of phosphorus-containing iron ore |
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|---|---|
| CN101037724A CN101037724A (en) | 2007-09-19 |
| CN100424202C true CN100424202C (en) | 2008-10-08 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818249B (en) * | 2010-04-27 | 2012-07-18 | 武汉理工大学 | Method for improving iron and reducing phosphorus of high phosphorus oolitic iron ore by magnetic roasting and two-step bioleaching |
| CN102168174B (en) * | 2011-04-07 | 2012-10-10 | 中国地质大学（武汉） | Method for dephosphorizing high-phosphorus hematite |
| CN102251099B (en) * | 2011-07-14 | 2014-04-02 | 北京科技大学 | Method for removing arsenic, sulfur and phosphorus by using thiobacillusacidophilus |
| CN102268539B (en) * | 2011-08-03 | 2013-06-05 | 北京科技大学 | Method for removing phosphorus from high-phosphorus iron ore through two-step acid leaching |
| CN102732717B (en) * | 2012-06-27 | 2014-08-20 | 宜昌市正济文化传播有限公司 | Hematite dephosphorizing agent and its preparation method |
| CN103920694B (en) * | 2014-04-08 | 2015-12-09 | 重庆大学 | The method of Rapid deactivation parcel phosphorus mine tailing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710113A (en) * | 2005-05-12 | 2005-12-21 | 张志发 | Dephosphorization treating method for iron-ore and refined iron powder |
| CN1904080A (en) * | 2006-08-10 | 2007-01-31 | 武汉科技大学 | Dephosphorus iron extraction production method of oolitic high phosphorus red iron ore |
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2007
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710113A (en) * | 2005-05-12 | 2005-12-21 | 张志发 | Dephosphorization treating method for iron-ore and refined iron powder |
| CN1904080A (en) * | 2006-08-10 | 2007-01-31 | 武汉科技大学 | Dephosphorus iron extraction production method of oolitic high phosphorus red iron ore |
Non-Patent Citations (2)
| Title |
|---|
| 梅山高磷铁矿石微生物脱磷研究. 何良菊，胡芳仁，魏德洲.矿冶，第9卷第1期. 2000 |
| 梅山高磷铁矿石微生物脱磷研究. 何良菊，胡芳仁，魏德洲.矿冶，第9卷第1期. 2000 * |
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