CN1757769A - Desulfur method of iron ore - Google Patents

Desulfur method of iron ore Download PDF

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Publication number
CN1757769A
CN1757769A CNA2005100310901A CN200510031090A CN1757769A CN 1757769 A CN1757769 A CN 1757769A CN A2005100310901 A CNA2005100310901 A CN A2005100310901A CN 200510031090 A CN200510031090 A CN 200510031090A CN 1757769 A CN1757769 A CN 1757769A
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iron ore
ore concentrate
domestication
substratum
desulfurization
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CN1322152C (en
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刘晓荣
廖代华
王晶
何绍刚
陈建斌
孙亚琴
胡继业
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Panzhihua Iron and Steel Group Corp
Shanghai Institute of Technology
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Panzhihua Iron and Steel Group Corp
Shanghai Institute of Technology
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    • 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

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  • Manufacture And Refinement Of Metals (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

A process for desulfurizing iron ore concentrate includes such steps as culturing the mixture of thiobacillus ferro oxidans and thiobacillus sulfur oxidans in the non-Fe culture medium containing sulfur powder as energy source, adding the high-S iron ore concentrate containing pyrrhotite, naturalizing culture to obtain desulfurizing bacteria, putting them in water, immersing said high-S iron ore concentrate in it, vibrating in shaker for desulfurizing, washing and drying.

Description

A kind of desulfur method of iron ore
Technical field
The present invention relates to the preliminary treatment method of a kind of ore or waste material, relate to a kind of desulfur method of iron ore in particular.
Background technology
Magnetite is a kind of important raw mineral materials of smelting iron and steel, because the needs of production technique and steel quality require very strictness to the magnetite sulfur-bearing, sulfur method commonly used at present has magnetic method and flotation process.China extensively is distributed with the skarn type ferruginous deposits, and useful iron mineral mostly is magnetite greatly, wherein contains sulfur mineral based on pyrite and pyrrhotite.This class magnetic iron ore obtains high-grade iron ore concentrate easily through magnetic separation, yet because magnetite and the tight symbiosis of pyrrhotite, the characteristics of frangible, easy argillization that pyrrhotite has, easy oxidation, flotability is relatively poor, be suppressed easily and difficult floating, still do not have economy both at home and abroad, sophisticated technology can be separated it well with medicament with magnetite.And pyrrhotite and magnetite belong to strongly magnetic mineral together, in low-intensity magnetic field (71.6～95.5kA/m) are easy to separate with other mineral, and pyrrhotite to separate with magnetic separation between the magnetite almost be impossible.So, in the iron ore sweetening process of prior art pyrrhotite also major part enter iron ore concentrate, influenced quality product, even made the very high iron ore concentrate of some grades become waste product.In recent years, cost is low, pollution is little, energy consumption is low owing to having for the microbial metallurgy technology, high efficiency, characteristics such as easy and simple to handle are subjected to extensive concern, has obtained commercial application in the hydrometallurgy field of extracting metals such as copper, gold, uranium.The microbial metallurgy technology is used for desulfurization research and gets that more to be that coal is pyritous remove, and yet there are no report about the method for magnetite or magnetite concentrate microbial desulfurization.
Summary of the invention
Technical problem to be solved by this invention is to utilize the biological oxidation of Thiobacillus bacterium, removes with pyrrhotite to be the sulphur in the high-sulfur magnetite concentrate that mainly contains sulfur mineral.
The technical solution used in the present invention: a kind of desulfur method of iron ore comprises the following steps:
A. cultivate desulfurizing bacteria: with the sulphur powder is that energy substance replaces the Fe in the 9k substratum 2+Preparation does not contain Fe 2+9k sulphur powder substratum, control medium pH value is 1.8～2.5, to the cultivation of going down to posterity of the mixed bacterium of thiobacillus ferrooxidant, thiobacillus thiooxidans, culture temperature is 25 ℃～35 ℃;
B. desulfurizing bacteria domestication: in above-mentioned 9k sulphur powder substratum, add iron ore concentrate to be desulfurization, increase iron ore concentrate 2% one by one, just reduce sulphur powder consumption 2%, when iron ore concentrate content 〉=10%, stop to make the energy with the sulphur powder, control domestication cultivates that pH value is 1.8～2.5, temperature is 25 ℃～35 ℃, and the domestication cultivation obtains concentration greater than 10 more than five generations 7The adaptability domestication desulfurization bacterium of individual/ml;
C. bacterium is leached desulfurization: the adding pulp density is 5%～25% iron ore concentrate and inoculates 1%～10% concentration greater than 10 in leaching container 7The adaptability of individual/ml domestication desulfurization bacterium liquid, control pH value are 1.8～2.5, temperature is 25 ℃～35 ℃, vibration leach after 3～25 days with iron ore concentrate with ordinary method filter, clean, dry, obtain the desulfurization iron ore concentrate of sulphur content reduction.
1 liter of 9k sulphur powder substratum contains (NH in the described 9k sulphur of the step a powder substratum 4) 2SO 43.0g, MgSO 47H 2O0.5g, KCl0.1g, K 2HPO 40.5g, Ca (NO 3) 20.01g and sulphur powder 10g.
The described desulfurizing bacteria domestication of step b is carried out in the water bath with thermostatic control vibrator, and rotating speed is 100-180r/min, contains iron ore concentrate 10%～20% in the final substratum.
Leaching container among the step c is 250ml～1000ml Erlenmeyer flask, is placed in the water bath with thermostatic control vibrator and vibrates hunting speed 100-180r/min.
The invention has the beneficial effects as follows: the present invention utilizes the biological oxidation of Thiobacillus bacterium, adopts the method that acidic conditions stirs down or vibration is leached, and removes with pyrrhotite to the sulphur in the high-sulfur magnetite concentrate that mainly contains sulfur mineral, obtains doctor negative iron ore concentrate.The present invention is a kind of microbial metallurgy technology, has that cost is low, pollution is little, energy consumption is low, a high efficiency, characteristics such as easy and simple to handle, adopts iron ore concentrate desulfurization degree of the present invention greater than 70%.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail: thiobacillus (Thiobacillus) belongs to bacterium and extensively is present in the acid wastewater in mine that contains sulphur or sulfide and hot spring, the soil.Thiobacillus makes the sulphur in the sulphide ores enter solution with the dissolving of the form of sulfate radical by direct oxidation effect and indirect oxidation effect, thereby reaches the purpose of desulfurization with ore separation.The present invention has just utilized thiobacillus (Thiobacillus) to belong to this specific character of bacterium.A kind of desulfur method of iron ore comprises the following steps: that a. cultivates desulfurizing bacteria: with the sulphur powder is that energy substance replaces the Fe in the 9k substratum 2+Preparation does not contain Fe 2+9k sulphur powder substratum, control medium pH value is 1.8～2.5, to the cultivation of going down to posterity of the mixed bacterium of thiobacillus ferrooxidant, thiobacillus thiooxidans, culture temperature is 25 ℃～35 ℃; B. desulfurizing bacteria domestication: in above-mentioned 9k sulphur powder substratum, add iron ore concentrate to be desulfurization, increase iron ore concentrate 2% one by one, just reduce sulphur powder consumption 2%, when iron ore concentrate content 〉=10%, stop to make the energy with the sulphur powder, control domestication cultivates that pH value is 1.8～2.5, temperature is 25 ℃～35 ℃, and the domestication cultivation obtains concentration greater than 10 more than five generations 7The adaptability domestication desulfurization bacterium of individual/ml; C. bacterium is leached desulfurization: the adding pulp density is 5%～25% iron ore concentrate and inoculates 1%～10% concentration greater than 10 in leaching container 7The adaptability of individual/ml domestication desulfurization bacterium liquid, control pH value are 1.8～2.5, temperature is 25 ℃～35 ℃, vibration leach after 3～25 days with iron ore concentrate with ordinary method filter, clean, dry, obtain the desulfurization iron ore concentrate of sulphur content reduction.1 liter of 9k sulphur powder substratum contains (NH in the described 9k sulphur of the step a powder substratum 4) 2SO 43.0g, MgSO 47H 2O0.5g, KCl0.1g, K 2HPO 40.5g, Ca (NO 3) 20.01g and sulphur powder 10g.The described desulfurizing bacteria domestication of step b is carried out in the water bath with thermostatic control vibrator, and rotating speed is 100-180r/min, contains iron ore concentrate 10%～20% in the final substratum.Leach container among the step c for for 250ml～1000ml Erlenmeyer flask, be placed on and vibrate in the water bath with thermostatic control vibrator, hunting speed 100-180r/min.
Embodiment
The mixed bacterium water sample that contains bacteriums such as thiobacillus ferrooxidant, thiobacillus thiooxidans is taken from the acidic mine water of a copper mine.After 9k substratum separation and Culture, be 2.0 9k iron-free substratum, be the energy substance cultivation of further going down to posterity with the pH value again with the sulphur powder.Biochemical incubator temperature is set at 30 ℃.
Add the 10ml mixed bacteria liquid in the 9k sulphur powder substratum after the 90ml sterilising treatment, in bacterium liquid, add v-ti magnetite concentrate bacterium is tamed cultivation.Respectively taming in the culture cycle in sequence, increase the add-on of v-ti magnetite concentrate one by one.About 2.0, domestication is cultivated and is carried out in the water bath with thermostatic control vibrator with 5M sulfuric acid control pH value, and rotating speed is 100-180r/min, and temperature is set at 30 ℃.
In Erlenmeyer flask, add 9k basis salt after 100ml～300ml sterilising treatment and 5%～25% v-ti magnetite concentrate, insert 1% mixed bacterium bacterium liquid through the domestication cultivation, adjust initial pH value 2.0, the pH value is controlled between the 2.0-2.8 in the process of the test, 30 ℃ of temperature, carry out in the water bath with thermostatic control vibrator, rotating speed is 150r/min.Desulphurization reaction is after for some time, v-ti magnetite concentrate filtered, and clear water spray washing five times, 110 ℃ of dry 2h obtain the low-sulfur v-ti magnetite concentrate after the desulfurization.
Under the processing condition of embodiment, the v-ti magnetite concentrate desulfurization degree reduces with liquid-solid ratio and presents reduction trend, increases with the prolongation of extraction time, and experimental test the results are shown in Table 1, table 2.
The S that takes off that the different pulp densities of table 1 are handled the back iron ore concentrate leads
Pulp density Blank sample 10% 5％ 10％ 15％ 20％ 25％
Decreasing ratio/% of the content of S/% S 0.34 50.7 0.16 76.81 0.205 70.29 0.225 67.39 0.25 63.77 0.235 65.94
Annotate: 1. the original sulphur content of v-ti magnetite concentrate is 0.69%
2. blank sample does not insert desulfurizing bacteria, and pulp density is 10%
3. extraction time is 15 days
The S that takes off that the different extraction times of table 2 are handled the back iron ore concentrate leads
Extraction time 5 days 10 days 15 days 20 days 25 days
Decreasing ratio/% of the content of S/% S 0.539 21.88 0.375 45.65 0.187 72.9 0.154 77.68 0.0935 86.45
Annotate: 1. pulp density is 10%
Above said content only is the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technical scheme of the present invention is done, all should belong to protection scope of the present invention.

Claims (4)

1. a desulfur method of iron ore comprises the following steps:
A. cultivate desulfurizing bacteria: with the sulphur powder is that energy substance replaces the Fe in the 9k substratum 2+Preparation does not contain Fe 2+9k sulphur powder substratum, control medium pH value is 1.8～2.5, to the cultivation of going down to posterity of the mixed bacterium of thiobacillus ferrooxidant, thiobacillus thiooxidans, culture temperature is 25 ℃～35 ℃;
B. desulfurizing bacteria domestication: in above-mentioned 9k sulphur powder substratum, add iron ore concentrate to be desulfurization, increase iron ore concentrate 2% one by one, just reduce sulphur powder consumption 2%, when iron ore concentrate content 〉=10%, stop to make the energy with the sulphur powder, control domestication cultivates that pH value is 1.8～2.5, temperature is 25 ℃～35 ℃, and the domestication cultivation obtains concentration greater than 10 more than five generations 7The adaptability domestication desulfurization bacterium of individual/ml;
C. bacterium is leached desulfurization: the adding pulp density is 5%～25% iron ore concentrate and inoculates 1%～10% concentration greater than 10 in leaching container 7The adaptability of individual/ml domestication desulfurization bacterium liquid, control pH value are 1.8～2.5, temperature is 25 ℃～35 ℃, vibration leach after 3～25 days with iron ore concentrate with ordinary method filter, clean, dry, obtain the desulfurization iron ore concentrate of sulphur content reduction.
2. according to the described desulfur method of iron ore of claim 1, it is characterized in that: 1 liter of 9k sulphur powder substratum contains (NH in the described 9k sulphur of the step a powder substratum 4) 2SO 43.0g, MgSO 47H 2O 0.5g, KCl 0.1g, K 2HPO 40.5g, Ca (NO 3) 20.01g and sulphur powder 10g.
3. according to the described desulfur method of iron ore of claim 1, it is characterized in that: the described desulfurizing bacteria domestication of step b is carried out in the water bath with thermostatic control vibrator, and rotating speed is 100-180r/min, contains iron ore concentrate 10%～20% in the final substratum.
4. according to the described desulfur method of iron ore of claim 1, it is characterized in that: leaching container among the step c is 250ml～1000ml Erlenmeyer flask, is placed in the water bath with thermostatic control vibrator and vibrates hunting speed 100-180r/min.
CNB2005100310901A 2005-10-25 2005-10-25 Desulfur method of iron ore Expired - Fee Related CN1322152C (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101818249A (en) * 2010-04-27 2010-09-01 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
CN101003757B (en) * 2006-12-21 2011-07-20 中国矿业大学 Electrochemical regulating and controlling method and equipment of biological desulphurization for coal
CN102251099A (en) * 2011-07-14 2011-11-23 北京科技大学 Method for removing arsenic, sulfur and phosphorus by using thiobacillusacidophilus
CN104086044A (en) * 2014-06-27 2014-10-08 中国矿业大学 Method for removing sulfur from circulating coal slime water
CN104531992A (en) * 2014-12-23 2015-04-22 中南大学 Application of ferric phosphate for reinforcement of bacterial leaching out of nickel sulphide ores
CN105542898A (en) * 2015-12-15 2016-05-04 辽宁工程技术大学 Desulphurization method of coal dust via biological oxidation
CN105779761A (en) * 2014-12-24 2016-07-20 北京有色金属研究总院 Method for desulfurating high-sulfur iron ores by using low-temperature efficient sulfur-oxidizing bacterium
CN110586317A (en) * 2019-09-26 2019-12-20 中冶北方（大连）工程技术有限公司 Dry magnetic separation-biological mineral separation process for treating sulfur-containing iron ore

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU606516A1 (en) * 1974-04-23 1991-03-07 Научно-Исследовательский И Проектный Институт Обогащения И Механической Обработки Полезных Ископаемых "Уралмеханобр" Method of obtaining cement binder pellet
CN1594610A (en) * 2004-07-13 2005-03-16 徐晓军 Method for biological desulfurization by catalytic oxidation of pyrite residue and associated non-ferrous metal leach

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101003757B (en) * 2006-12-21 2011-07-20 中国矿业大学 Electrochemical regulating and controlling method and equipment of biological desulphurization for coal
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
CN101818249A (en) * 2010-04-27 2010-09-01 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
CN102251099A (en) * 2011-07-14 2011-11-23 北京科技大学 Method for removing arsenic, sulfur and phosphorus by using thiobacillusacidophilus
CN102251099B (en) * 2011-07-14 2014-04-02 北京科技大学 Method for removing arsenic, sulfur and phosphorus by using thiobacillusacidophilus
CN104086044B (en) * 2014-06-27 2016-01-20 中国矿业大学 The removal methods of sulphur in a kind of black water that circulates
CN104086044A (en) * 2014-06-27 2014-10-08 中国矿业大学 Method for removing sulfur from circulating coal slime water
CN104531992A (en) * 2014-12-23 2015-04-22 中南大学 Application of ferric phosphate for reinforcement of bacterial leaching out of nickel sulphide ores
CN105779761A (en) * 2014-12-24 2016-07-20 北京有色金属研究总院 Method for desulfurating high-sulfur iron ores by using low-temperature efficient sulfur-oxidizing bacterium
CN105779761B (en) * 2014-12-24 2018-02-23 北京有色金属研究总院 A kind of method that high sulfide pyrite desulfurization is carried out with efficient cryogenic sulfur oxidizing bacterium
CN105542898A (en) * 2015-12-15 2016-05-04 辽宁工程技术大学 Desulphurization method of coal dust via biological oxidation
CN105542898B (en) * 2015-12-15 2018-01-30 辽宁工程技术大学 A kind of coal dust biological oxidation sulfur method
CN110586317A (en) * 2019-09-26 2019-12-20 中冶北方（大连）工程技术有限公司 Dry magnetic separation-biological mineral separation process for treating sulfur-containing iron ore

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