CN104673995A - Method for combined recovery and sulfur removal of pyrite and magnetite - Google Patents
Method for combined recovery and sulfur removal of pyrite and magnetite Download PDFInfo
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- CN104673995A CN104673995A CN201510078032.8A CN201510078032A CN104673995A CN 104673995 A CN104673995 A CN 104673995A CN 201510078032 A CN201510078032 A CN 201510078032A CN 104673995 A CN104673995 A CN 104673995A
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000011593 sulfur Substances 0.000 title claims abstract description 59
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 59
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910052683 pyrite Inorganic materials 0.000 title claims abstract description 21
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000011028 pyrite Substances 0.000 title claims abstract description 21
- 238000011084 recovery Methods 0.000 title claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 135
- 239000012141 concentrate Substances 0.000 claims abstract description 104
- 229910052742 iron Inorganic materials 0.000 claims abstract description 71
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005188 flotation Methods 0.000 claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 10
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 102000005298 Iron-Sulfur Proteins Human genes 0.000 claims abstract description 6
- 108010081409 Iron-Sulfur Proteins Proteins 0.000 claims abstract description 6
- 239000005864 Sulphur Substances 0.000 claims description 43
- 238000006477 desulfuration reaction Methods 0.000 claims description 24
- 230000023556 desulfurization Effects 0.000 claims description 23
- 229910052952 pyrrhotite Inorganic materials 0.000 claims description 22
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 21
- 239000011707 mineral Substances 0.000 claims description 21
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 17
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 10
- 238000010494 dissociation reaction Methods 0.000 claims description 7
- 230000005593 dissociations Effects 0.000 claims description 7
- 150000002505 iron Chemical class 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 claims description 7
- 238000009835 boiling Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 5
- 235000011613 Pinus brutia Nutrition 0.000 claims description 5
- 241000018646 Pinus brutia Species 0.000 claims description 5
- 229960000411 camphor oil Drugs 0.000 claims description 5
- 239000010624 camphor oil Substances 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 239000006148 magnetic separator Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 abstract description 2
- 241000894006 Bacteria Species 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 229910000365 copper sulfate Inorganic materials 0.000 description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001608 iron mineral Inorganic materials 0.000 description 3
- 229910052976 metal sulfide Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KOVPITHBHSZRLT-UHFFFAOYSA-N 2-methylpropoxymethanedithioic acid Chemical compound CC(C)COC(S)=S KOVPITHBHSZRLT-UHFFFAOYSA-N 0.000 description 1
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 241000605118 Thiobacillus Species 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The invention provides a method for combined recovery and sulfur removal of pyrite and magnetite. The method comprises the following steps: performing flotation to obtain sulfur concentrate; performing magnetic separation to obtain high-sulfur iron ore concentrate; mixing two concentrates into iron-sulfur mixed concentrate, and supplying high-grade sulfur concentrate or sulfur, so that the mixed material meets the sulfur content requirement during fluidized bed roasting; and removing sulfur by virtue of high-temperature fluidized bed roasting, thereby obtaining fluidized bed roaster slag with low sulfur content, wherein the slag refers to the iron concentrate of which the sulfur content meets the ironmaking requirement. The method is extremely effective for a sulfur electrode which is difficultly separated in the iron concentrate by virtue of a flotation method, and high-sulfur iron concentrate resources can be efficiently utilized.
Description
technical field:
The present invention relates to a kind of method of sulfurous iron ore and magnetite combined recovery and desulfurization, belong to ore dressing metallurgical technology field.
background technology:
Nonferrous metal sulfide mineral is normal with sulfurous iron ore association altogether, also there is a small amount of magnetite, the mine tailing after nonferrous metal sulfide mineral flotation simultaneously, can be reclaimed sulfurous iron ore as iron concentrate by flotation, by magnetic separation using magnetite recovery as iron ore concentrate.But, sulfurous iron ore is primarily of pyrite, pyrrhotite composition, the flotability of pyrrhotite is lower than pyrite, the technique of floatation recovery sulfurous iron ore is difficult to pyrrhotite all to reclaim, and residual part pyrrhotite has stronger magnetic, when magnetite is reclaimed in follow-up magnetic separation, enter iron ore concentrate, cause iron ore concentrate sulfur-bearing high, concentrate is defective.
The patent No. be 200510031090.1 patent of invention disclose desulfur method of iron ore, its key step be included in pH value be in the 9k iron-free substratum of 1.8 ~ 2.5 with sulphur powder for energy substance is cultivated containing thiobacillus ferrooxidant and thiobacillus thiooxidans mixed bacterium, in pH value be again in the 9k iron-free substratum of 1.8 ~ 2.5 with sulphur powder for energy substance, add the to be desulfurization iron concentrate containing high sulphur that is main sulfide mineral with pyrrhotite to carry out adaptability domestication and cultivate, obtain adaptability domestication desulfurization bacterium, iron concentrate containing high sulphur is dipped in the water containing adaptability domestication desulfurization bacterium liquid and carries out shaking table vibration leaching desulfurization, again after filtration, washing, drying obtains satisfactory low-sulfur iron ore concentrate.
The patent No. be 201310189729.3 patent of invention announce the method for the efficient active flotation desulfurization of a kind of high-sulfur magnetite concentrate, high-sulfur magnetite concentrate is added water to finite concentration size mixing, add activator CA, copper sulfate successively, collecting agent butyl xanthate, pore forming material No. 2 oil, carry out a thick fine de-sulfur flotation, obtain final low-sulfur iron ore concentrate and iron concentrate.The method has that desulfuration efficiency is high, medicament corrodibility is little and the simple feature of technical process, for sulphur content up to the iron ore concentrate of 1.19%, adopts the method for this invention, sulphur content in final iron ore concentrate can be down to less than 0.15%.But for pyrrhotite and the fine and close symbiosis of magnetite, the iron sulphur ore of monomer dissociation difficulty and pyrrhotite flotability difference, is difficult to obtain such technical indicator.
The patent No. be 200710036078.9 patent of invention disclose a kind of method of high sulfide pyrite powder desulfurization, be applicable to containing the desulfurization in the powdered iron ore of sulphur iron ore and sulfide flotation mining tailing.When sulphur in iron ore concentrate (mainly pyrrhotite) reaches more than 15%, by adopting the principle of asynchronous sorting, iron ore concentrate can be made to reach more than 65%, and wherein sulphur content is reduced to less than 0.3%.Equally, such method for the ore of pyrrhotite and magnetite monomer dissociation difficulty, poor effect.
The academic paper of " experimental study of Yunnan mountain of papers iron ore concentrate desulfurization " reports and adopts sodium sulphite and copper sulfate as activator, can deviate from the sulphur in iron ore concentrate.
" research of Feng Shan copper mine iron ore concentrate desulfurization test " academic paper reports the sulphur adopting high-efficient collecting agent NT480 to deviate from iron ore concentrate and obtains good result.
The iron ore concentrate desulfurization of Master's thesis to Chaoyang Xinhua molybdenum ore of " the molybdenum ore iron ore concentrate desulfurization test research of Chaoyang Xinhua " is furtherd investigate, this iron ore concentrate is regrinded, when-0.044mm content reaches 85%, slurry pH is 6, copper sulfate consumption is 300g/t, amount of sodium sulfide 100g/t, amount of sodium silicate 300g/t, hybrid collector butyl xanthate and Isobutylxanthic acid consumption are respectively 400g/t, 200g/t, 2# oil consumption 60g/t, roughly select through 1 time, 2 times are selected, in its flotation concentrate, the grade of sulphur can drop to 0.43%, and in concentrate, the decreasing ratio of sulphur is 53.16%.
The academic paper of " Separation Research of pyrrhotite and magnetite ", have studied the isolation technique that Wulate Rear Banner's Europe cloth begs iron ore magnetite and pyrrhotite, adopt stage grinding-staged magnetic separation-two magnetic cleaner flotation desulfurization process, the qualified iron ore concentrate of iron concentrate grade 63.50%, sulfur-bearing 0.21% can be obtained.
But for pyrrhotite and the fine and close symbiosis of magnetite, be difficult to monomer dissociation, Surface of Pyrrhotite is oxidized, and the iron concentrate containing high sulphur of flotability difference, adopts above beneficiation method desulfurization, is difficult to obtain desirable technical indicator.So, adopt new technology to realize the desulfurization of this iron concentrate containing high sulphur, there is important practical significance.
summary of the invention:
The invention provides a kind of method of sulfurous iron ore and magnetite combined recovery and desulfurization, object adopts floating magnetic combined process flow to obtain iron sulfide mixed concentrate, the sulphur in iron sulfide mixed concentrate is deviate from the high-temperature roasting of employing fluidizing furnace, make fluidizing furnace slag sulfur-bearing reach the specification of quality of iron-smelting raw material to iron ore concentrate, solve the technical problem of iron concentrate containing high sulphur desulfurization difficulty.
the present invention is achieved through the following technical solutions:
1, for the iron sulphur ore of the fine and close symbiosis of pyrrhotite and magnetite, by muck and ore grinding, make the mass percentage of-0.074mm grade in ore milling product be greater than 75%, iron sulfur mineral and gangue mineral liberation degree of minerals are greater than 90%; Add sulfuric acid and regulate slurry pH to 5.5 ~ 6.5, add butyl xanthate 200 ~ 400g/t, add pore forming material pine camphor oil 20 ~ 40g/t, stir 4 ~ 6 minutes, carry out 8 ~ 12 minutes roughly selecting with flotation machine, the mine tailing after roughly selecting adds butyl xanthate 100 ~ 150g/t, scan once, scan 5 ~ 7 minutes time, roughly select selected 3 ~ 4 times of the concentrate of acquisition, obtain sulfurous iron ore concentrate; Flotation tailings adopts the magnetic separation of magneticstrength 800 ~ 1200Oe low intensity magnetic separator, obtain sulfur-bearing higher than 3% iron concentrate containing high sulphur; This iron concentrate containing high sulphur and flotation of sulfur concentrate are merged into iron sulfide mixed concentrate;
2, in iron sulfide mixed concentrate, allocate highgrade pyrite concentrate or sulphur that sulphur grade is greater than iron sulfide mixed concentrate sulphur grade into, make the sulfur-bearing grade of compound reach 30 ~ 35%, in the compound be made into, the mass percent of the highgrade pyrite concentrate allocated into is by γ=100[(β
3-β
2)/(β
1-β
2)] calculate, β in formula
1for the highgrade pyrite concentrate sulfur-bearing grade allocated into, β
2for the sulfur-bearing grade of iron sulfide mixed concentrate, β
3for the sulfur-bearing grade of compound;
3, compound boiling roaster step 2 obtained, maturing temperature 900 ~ 980 DEG C, coefficient of excess air 1.2 ~ 1.3, intensity of roasting 7 ~ 8t/m
2d, the sulfur dioxide flue gas that roasting obtains is for the production of sulfuric acid, and the fluidizing furnace slag of acquisition is iron ore concentrate.
the present invention has the following advantages and positively effect:
1, adopt floatation desulphurization not reach the iron concentrate containing high sulphur of requirement, adopt the method desulfurization of fluidized bed roasting by allocating higher-grade sulfurous iron ore concentrate into, can obtain satisfied sweetening effectiveness, the sulfur-bearing grade of iron concentrate containing high sulphur can drop to less than 0.4%;
During 2, conventional boiling roaster highgrade pyrite concentrate, itself need to allocate certain slag into, reduce feed grade, ensure the thermal equilibrium of fluidizing furnace.Change slag into iron concentrate containing high sulphur, both reduced the feed grade of fluidizing furnace, iron concentrate containing high sulphur can be made again to be able to high-temperature roasting desulfurization, and fluidizing furnace serves dual function, and efficiency improves greatly;
3, iron concentrate containing high sulphur is owing to needing through desulfurization with roasting technique afterwards, does not need to limit sulphur content, this simplify flotation flowsheet, reduces the cost that iron ore concentrate reclaims.
accompanying drawing illustrates:
Fig. 1 is process flow sheet of the present invention.
embodiment:
embodiment one:
Pyrite Ore sulfur-bearing grade 22%, main containing sulfur minerals is pyrite, pyrrhotite, and iron mineral is magnetite, pyrrhotite and the fine and close symbiosis of magnetite, monomer dissociation difficulty.
1, carry out muck and ore grinding to this iron sulphur ore, make the mass percentage of-0.074mm grade in ore milling product be greater than 75%, iron sulfur mineral and gangue mineral liberation degree of minerals are greater than 90%; Add sulfuric acid and regulate slurry pH to 5.5, add butyl xanthate 300g/t, add pore forming material pine camphor oil 30g/t, stir 4 ~ 6 minutes, carry out 8 ~ 12 minutes roughly selecting with flotation machine, the mine tailing after roughly selecting adds butyl xanthate 150g/t, scan once, scan 5 ~ 7 minutes time, roughly select selected 3 times of the concentrate of acquisition, obtain the sulfurous iron ore concentrate of sulfur-bearing grade 45%; Flotation tailings adopts the magnetic separation of magneticstrength 800Oe low intensity magnetic separator, obtains the iron concentrate containing high sulphur of sulfur-bearing 3.1%; This iron concentrate containing high sulphur and flotation of sulfur concentrate are merged into the iron sulfide mixed concentrate of sulfur-bearing 24%.
2, in iron sulfide mixed concentrate, allocate the highgrade pyrite concentrate of sulphur grade 48% into, the sulfur-bearing grade making compound is 30%, and in the compound be made into, the highgrade pyrite concentrate mass percent allocated into is by γ=100[(β
3-β
2)/(β
1-β
2)] calculate 25%.
3, compound boiling roaster step 2 obtained, maturing temperature 900 DEG C, coefficient of excess air 1.2, intensity of roasting 7t/m
2d, the sulfur dioxide flue gas that roasting obtains is for the production of sulfuric acid, and the fluidizing furnace slag of acquisition is iron ore concentrate.
Iron ore concentrate ferrous grade 63%, sulfur-bearing grade 0.20%.
embodiment two:
Pyrite Ore sulfur-bearing grade 15%, main containing sulfur minerals is pyrrhotite, and iron mineral is magnetite, pyrrhotite and the fine and close symbiosis of magnetite, monomer dissociation difficulty.
1, carry out muck and ore grinding to this iron sulphur ore, make the mass percentage of-0.074mm grade in ore milling product be greater than 75%, iron sulfur mineral and gangue mineral liberation degree of minerals are greater than 90%; Add sulfuric acid and regulate slurry pH to 6, add butyl xanthate 200g/t, add pore forming material pine camphor oil 20g/t, stir stirring 4 ~ 6 minutes, carry out 8 ~ 12 minutes roughly selecting with flotation machine, the mine tailing after roughly selecting adds butyl xanthate 100g/t, scan once, scan 5 ~ 7 minutes time, roughly select selected 3 times of the concentrate of acquisition, obtain the sulfurous iron ore concentrate of sulfur-bearing grade 36%; Flotation tailings adopts the magnetic separation of magneticstrength 1000Oe low intensity magnetic separator, obtains the iron concentrate containing high sulphur of sulfur-bearing 5%; This iron concentrate containing high sulphur and flotation of sulfur concentrate are merged into the iron sulfide mixed concentrate of sulfur-bearing 20%.
2, in iron sulfide mixed concentrate, allocate the sulphur of sulfur-bearing 100% into, the sulfur-bearing grade making compound is 35%, in the compound be made into, allocates the mass percent of sulphur into by γ=100[(β
3-β
2)/(β
1-β
2)] calculate 18.75%.
3, compound boiling roaster step 2 obtained, maturing temperature 980 DEG C, coefficient of excess air 1.2 ~ 1.3, intensity of roasting 7 ~ 8t/m
2d, the sulfur dioxide flue gas that roasting obtains is for the production of sulfuric acid, and the fluidizing furnace slag of acquisition is iron ore concentrate.
Iron ore concentrate ferrous grade 65%, sulfur-bearing grade 0.18%.
embodiment three:
Mine tailing after nonferrous metal sulfide mineral flotation, the mass percentage of-0.074mm grade is greater than 75%, iron sulfur mineral and gangue mineral liberation degree of minerals are greater than 90%, sulfur-bearing grade 12%, main containing sulfur minerals is pyrite, white pyrite, pyrrhotite, iron mineral is magnetite, pyrrhotite and the fine and close symbiosis of magnetite, monomer dissociation difficulty.
1, add sulfuric acid and regulate slurry pH to 6.5, add butyl xanthate 400g/t, add pore forming material pine camphor oil 40g/t, stir stirring 4 ~ 6 minutes, carry out 8 ~ 12 minutes roughly selecting with flotation machine, the mine tailing after roughly selecting adds butyl xanthate 120g/t, scan once, scan 5 ~ 7 minutes time, roughly select selected 4 times of the concentrate of acquisition, obtain the sulfurous iron ore concentrate of sulfur-bearing grade 40%; Flotation tailings adopts the magnetic separation of magneticstrength 1200Oe low intensity magnetic separator, obtains the iron concentrate containing high sulphur of sulfur-bearing 3.6%; This iron concentrate containing high sulphur and flotation of sulfur concentrate are merged into the iron sulfide mixed concentrate of sulfur-bearing 25%.
2, in iron sulfide mixed concentrate, allocate the sulphur of sulfur-bearing 100% into, the sulfur-bearing grade making compound is 35%, in the compound be made into, allocates the mass percent of sulphur into by γ=100[(β
3-β
2)/(β
1-β
2)] calculate 13.33%.；
3, compound boiling roaster step 2 obtained, maturing temperature 950 DEG C, coefficient of excess air 1.2 ~ 1.3, intensity of roasting 7 ~ 8t/m
2d, the sulfur dioxide flue gas that roasting obtains is for the production of sulfuric acid, and the fluidizing furnace slag of acquisition is iron ore concentrate.
Iron ore concentrate ferrous grade 64%, sulfur-bearing grade 0.15%.
Claims (2)
1. a method for sulfurous iron ore and magnetite combined recovery and desulfurization, is characterized in that carrying out according to the following steps:
(1) by iron sulphur ore, by muck and ore grinding, make the mass percentage of-0.074mm grade in ore milling product be greater than 75%, iron sulfur mineral and gangue mineral liberation degree of minerals are greater than 90%; Add sulfuric acid and regulate slurry pH to 5.5 ~ 6.5, add butyl xanthate 200 ~ 400g/t, add pore forming material pine camphor oil 20 ~ 40g/t, stir 4 ~ 6 minutes, carry out 8 ~ 12 minutes roughly selecting with flotation machine, the mine tailing after roughly selecting adds butyl xanthate 100 ~ 150g/t, scan once, scan 5 ~ 7 minutes time, roughly select selected 3 ~ 4 times of the concentrate of acquisition, obtain sulfurous iron ore concentrate; Flotation tailings adopts the magnetic separation of magneticstrength 800 ~ 1200Oe low intensity magnetic separator, obtain sulfur-bearing higher than 3% iron concentrate containing high sulphur; This iron concentrate containing high sulphur and flotation of sulfur concentrate are merged into iron sulfide mixed concentrate;
(2) in iron sulfide mixed concentrate, allocate highgrade pyrite concentrate or sulphur that sulphur grade is greater than iron sulfide mixed concentrate sulphur grade into, the sulfur-bearing grade of compound is made to reach 30 ~ 35%, in the compound be made into, the mass percent of the highgrade pyrite concentrate allocated into is by γ=100[(β
3-β
2)/(β
1-β
2)] calculate, β in formula
1for the highgrade pyrite concentrate sulfur-bearing grade allocated into, β
2for the sulfur-bearing grade of iron sulfide mixed concentrate, β
3for the sulfur-bearing grade of compound;
(3) by the compound boiling roaster that step (2) obtains, maturing temperature 900 ~ 980 DEG C, coefficient of excess air 1.2 ~ 1.3, intensity of roasting 7 ~ 8t/m
2d, the sulfur dioxide flue gas that roasting obtains is for the production of sulfuric acid, and the fluidizing furnace slag of acquisition is iron ore concentrate.
2. the method for a kind of sulfurous iron ore according to claim 1 and magnetite combined recovery and desulfurization, is characterized in that described iron sulphur ore comprises pyrite, white pyrite, pyrrhotite, pyrrhotite and the fine and close symbiosis of magnetite, monomer dissociation difficulty.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293448A (en) * | 2015-10-23 | 2016-02-03 | 湖北祥云(集团)化工股份有限公司 | Method for recycling sulfur residues and pyrite to make acid and device thereof |
| CN108144744A (en) * | 2016-12-06 | 2018-06-12 | 南京梅山冶金发展有限公司 | The method for floating of sulphur in a kind of association troilite |
| CN109517971A (en) * | 2018-11-06 | 2019-03-26 | 包头钢铁（集团）有限责任公司 | A method of reducing iron concentrate containing high sulphur sulfur content |
| CN114289186A (en) * | 2021-12-03 | 2022-04-08 | 中国恩菲工程技术有限公司 | Magnetite desulfurization method |
| CN114849900A (en) * | 2022-03-21 | 2022-08-05 | 中南大学 | Method for recovering valuable elements in sulfur concentrate by combining pyrolysis and magnetic separation flotation |
| CN115415043A (en) * | 2022-07-20 | 2022-12-02 | 西北矿冶研究院 | Semi-definite distribution method of estramustine in pyrite beneficiation process |
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| DE3833381A1 (en) * | 1988-10-01 | 1990-04-05 | Bayer Ag | METHOD FOR PRODUCING SULFUR DIOXIDE |
| CN101224443A (en) * | 2007-12-28 | 2008-07-23 | 北京矿冶研究总院 | Comprehensive utilization method of iron sulfide minerals |
| CN101487080A (en) * | 2009-02-27 | 2009-07-22 | 中南大学 | Method for improving pyrite cinder grade |
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2015
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|---|---|---|---|---|
| DE3833381A1 (en) * | 1988-10-01 | 1990-04-05 | Bayer Ag | METHOD FOR PRODUCING SULFUR DIOXIDE |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105293448A (en) * | 2015-10-23 | 2016-02-03 | 湖北祥云(集团)化工股份有限公司 | Method for recycling sulfur residues and pyrite to make acid and device thereof |
| CN108144744A (en) * | 2016-12-06 | 2018-06-12 | 南京梅山冶金发展有限公司 | The method for floating of sulphur in a kind of association troilite |
| CN109517971A (en) * | 2018-11-06 | 2019-03-26 | 包头钢铁（集团）有限责任公司 | A method of reducing iron concentrate containing high sulphur sulfur content |
| CN114289186A (en) * | 2021-12-03 | 2022-04-08 | 中国恩菲工程技术有限公司 | Magnetite desulfurization method |
| CN114849900A (en) * | 2022-03-21 | 2022-08-05 | 中南大学 | Method for recovering valuable elements in sulfur concentrate by combining pyrolysis and magnetic separation flotation |
| CN115415043A (en) * | 2022-07-20 | 2022-12-02 | 西北矿冶研究院 | Semi-definite distribution method of estramustine in pyrite beneficiation process |
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Application publication date: 20150603 |