DE1817160B2 - Process for cleaning oxidic iron ores - Google Patents
Process for cleaning oxidic iron oresInfo
- Publication number
- DE1817160B2 DE1817160B2 DE1817160A DE1817160A DE1817160B2 DE 1817160 B2 DE1817160 B2 DE 1817160B2 DE 1817160 A DE1817160 A DE 1817160A DE 1817160 A DE1817160 A DE 1817160A DE 1817160 B2 DE1817160 B2 DE 1817160B2
- Authority
- DE
- Germany
- Prior art keywords
- iron
- solution
- halide
- metals
- amount
- 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.)
- Withdrawn
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 52
- 229910052742 iron Inorganic materials 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 10
- 238000004140 cleaning Methods 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- -1 ferrous metals Chemical class 0.000 claims description 11
- 150000002739 metals Chemical class 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 229910000039 hydrogen halide Inorganic materials 0.000 claims description 6
- 239000012433 hydrogen halide Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000012159 carrier gas Substances 0.000 claims description 5
- 150000004820 halides Chemical class 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052785 arsenic Inorganic materials 0.000 claims description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052790 beryllium Inorganic materials 0.000 claims description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000011572 manganese Substances 0.000 claims description 2
- 239000011669 selenium Substances 0.000 claims description 2
- 229910052711 selenium Inorganic materials 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 239000011135 tin Substances 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 241001676573 Minium Species 0.000 claims 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims 1
- 239000000567 combustion gas Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 150000002736 metal compounds Chemical class 0.000 claims 1
- 229910052750 molybdenum Inorganic materials 0.000 claims 1
- 239000011733 molybdenum Substances 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 9
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 6
- 239000011701 zinc Substances 0.000 description 4
- 235000013980 iron oxide Nutrition 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 235000005074 zinc chloride Nutrition 0.000 description 3
- 239000011592 zinc chloride Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/08—Chloridising roasting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Treating Waste Gases (AREA)
Description
FeX2 + H2O = FeO + 2HX (1)FeX 2 + H 2 O = FeO + 2HX (1)
MeO+ 2HX = MeX2 4-H2O (2)MeO + 2HX = MeX 2 4-H 2 O (2)
Die vorliegende Erfindung betrifft ein Verfahien 35 MeX2 + Fe = Me + FeX2 (3)
ium Reinigen oxidischer Eisenerze von Verbindungen von Blei, Kupfer, Aluminium, Arsen, Beryllium, worin X = Cl, Br, J oder F und Me = Metall, desMolybdän,
Wismut, Antimon, Selen, Zinn, Chrom, sen KntionenumwandeJbarkeit größer ist als die des
Mangan durch Einwirkenlassen von Halogenwasser- Eisens.The present invention relates to a method 35 MeX 2 + Fe = Me + FeX 2 (3)
To clean oxidic iron ores from compounds of lead, copper, aluminum, arsenic, beryllium, in which X = Cl, Br, J or F and Me = metal, desmolybdenum, bismuth, antimony, selenium, tin, chromium, and its conversion capacity is greater than that of manganese through exposure to halogenated water iron.
•toff und Wasserdampf in einer eine Temperatur von 40 Die Additionen der Gleichungen (1), (2) und (3)• toff and water vapor in a temperature of 40 The additions of equations (1), (2) and (3)
700° C nicht überschreitenden Reaktionszone, wobei ergibt:700 ° C not exceeding the reaction zone, resulting in:
die Erze mit einem aus Kohlenwasserstoff-Verbren- MeO + Fe = FeO + Me
»ungsgasen bestehenden Trägergas und einer azeotropen Lösung von Halogenwasserstoff in Wasser in Man verbraucht demgemäß Eisen in Form geringeiner
— bezogen auf die zu entfernenden Metall- 45 wertiger Abfälle, wie Feilspäne, Drehspäne, entzinnte
verbindungen — mindestens stöchiometrischen Bleche, gewinnt es jedoch zurück in Form reinen
Menge kontaktiert werden, nach Patentanmeldung Eisenoxids in Mischung mit gereinigtem Erz. Die
l> 15 83 898.9-24. Halogenwasserstoffsäure wird vollständig zuriick-the ores with one of hydrocarbons burn MeO + Fe = FeO + Me
Carrier gas consisting of carrier gas and an azeotropic solution of hydrogen halide in water in Man accordingly consumes iron in the form of low-grade metal waste, such as filings, turnings, de-tinned compounds, based on the metal to be removed - at least stoichiometric sheets, but recovers it in form pure amount are contacted, according to patent application iron oxide mixed with purified ore. The l> 15 83 898.9-24. Hydrohalic acid is completely reduced
Durch dieses Verfahren wird die weitgehende Rei- gewonnen.With this procedure, the most extensive reign is gained.
liigung oxidischer Eisenerze von den genannten Ver- 50 Falls das zu verarbeitende Erz einen geringen An-licensing of oxidic iron ores from the mentioned processing 50 If the ore to be processed has a small amount
•nreinigungen auf wirtschaftliche Weise ermöglicht teil an Metallen aufweist, deren Kationenumwandel-• allows cleaning in an economical way contains some metals whose cation-converting
«nd damit die Verhüttung beispielsweise der an barkeit geringer als die des Eisens ist, wie z.B.And so that the smelting, for example, is less available than that of iron, e.g.
Hämatit reichen Röstprodukte gestattet, die beim Chrom, Zink, Mangan, so werden diese Metalle nichtRoasted products rich in hematite are permitted when chromium, zinc, manganese, these metals are not
Rösten von schwefelhaltigen Eisenerzen, etwa zementiert und zurückgehalten, und ihre HalogenideRoasting iron ores containing sulfur, such as cemented and retained, and their halides
Pyriten, anfallen. 55 werden deshalb zusammen mit der HalogenidlösungPyrite. 55 are therefore used together with the halide solution
Es wurde nun gefunden, daß zur Bildung der azeo- des Eisens in die Reaktionszone zurückgeführt, wo sieIt has now been found that for the formation of the azeo of the iron is returned to the reaction zone, where it
tropen Lösung von Halogenwasserstoff vorteilhafter- augenblicklich verdampft werden. Diese HalogenideTropical solution of hydrogen halide is advantageously evaporated instantly. These halides
weise ein Eisenhalogenid verwen 1 t werden kann. akkumulieren sich deshalb in der rückzirkuliertenwisely an iron halide can be used 1 t. therefore accumulate in the recirculated
Dies ist besonders dann vorteilhaft, wenn Eisen- Lösung, von der man einen gewissen Anteil vorweg
oxiderze verarbeitet werden, deren Verunreinigungen «o abnimmt, um die genannten Metalle, deren Kationenganz oder zum größten Teil aus Metallen oder Ver- umwandelbarkeit geringer als die des Eisens ist, zu
bindungen von Metallen bestehen, deren Umwandei- entfernen. Der Grad dieser Abnahme wird gewählt
barkeit in Kationen größer als die des Eisens ist, in Abhängigkeit von dem Gehalt des verarbeiteten
d.h., daß die Verunreinigungen aus Metallen be- Erzes an diesen, vom Eisen nicht zementierbaren
sehen, deren Salze durch das Eisen zementierbar 65 Metallen, und zwar so, daß die Lösung niemals mit
sind. Dies sind beispielsweise Cadmium, Kobalt, deren Halogeniden gesättigt wird.
Nickelt Kupfer, Silber, Gold. Nachstehend wird die Durchführung des Verfah-This is particularly advantageous when iron solution, of which a certain proportion of oxide ores are processed beforehand, whose impurities are reduced by the metals mentioned, whose cations are entirely or for the most part made of metals, or less than that of iron is to exist to bonds of metals, remove their conversion. The degree of this decrease is chosen to be greater than that of iron, depending on the content of the processed metals, ie that the impurities from metals can be seen in these metals, which cannot be cemented by iron, the salts of which can be cemented by iron in such a way that the solution never comes with it. These are, for example, cadmium and cobalt, the halides of which become saturated.
Nickel copper, silver, gold. The procedure for carrying out the
Als Eisenhalogenide können Eisenchlorid, -bromid, rens an Hand eines Beispiels beschrieben.Iron chloride, bromide and rene can be described as iron halides using an example.
in einen Fließbettofen mit zwei Etagen von 20 cm Durchmesser hat man 30 kg/h Pyriterz mit 11% SiJiziumgehalt (SiO2), 1,2% Kupfergehalt (Cu) und 0,1 % Zinkgehalt (Zn) eingebracht. Die Ruidisation erfolgt durch neutrales Heizgas, das die Temperatur des Fließbettes auf 6500C hält. Man.bringt in das Fließbett 2,5 kg/h einer Lösung ein, die 35% Eisenchlorid (FeCl2) und 65% Wasser enthält. Das aus dem Zyklon des Ofens austretende Gasgemisch wird abgekühlt, was zur Kondensation von 2,4 kg/h einer wäßrigen Kupferchloridlösung (CuCL,) führt, die 0,06 kg/h Zinkchlorid (ZnCL2) enthält. Diese Lösung wild in ein Rührgefäß eingebracht, wo man ihr 0,35 kg/h Eisenfeilspäne zusetzt. Die Suspension aus dem Rührgefäß wird über einen Filter geführt, wo man 0,4 kg/h zementiertes Kupfer mit etwa 90% Cu und 2,5 kg/h einer Lösung von 35% Eisenchlorid gewinnt. Die letztere wird dem Fließbett wieder zugeführt. Um seme Anreicherung an Zinkchlorid zu begrenzen, wird ihm ein bestimmter Anteil entsprechend 0,125 kg/h entnommen, der in gleichem Gewicht durch 20%ige Chlorwasserstoffsäure ersetzt wird. Dieser entnommene Anteil kann auf irgendeine bekannte Weise zur Nutzbarmachung des Eisen- und Zinkchlorids, die enthalten sind, behandelt werden. Dem Fließbettofen entnimmt man ein Eisenoxidgemisch, das weniger als 0,03 % Cu und weniger als 0,01% Zn enthält. Man behandelt das Gemisch in einem zweiten Fließbettofen mit einem Gas, das sich bei der unvollständigen Verbrennung von C ergibt und ein COä/(CO + ILJ-Verhältnis von 17/3 aufweist, bei einer Temperatur von 600° C; alle Eisenoxide werden dabei in Magnetit (Fe3O4) umgewandelt, dessen Gehalt zu mehr als 98% beim Passieren eines Magnetsiebes erhalten wird. Dieser Magnetit enthält das vorher in dem Erz vorhandene Eisen sowie das zur Abtrennung des Kupfers verwendete Eisen.30 kg / h of pyrite ore with 11% silicon content (SiO 2 ), 1.2% copper content (Cu) and 0.1% zinc content (Zn) were introduced into a fluidized bed furnace with two floors of 20 cm diameter. The Ruidisation carried out by neutral heating gas, which maintains the temperature of the fluidized bed at 650 0 C. Man.bringt 2.5 kg / h of a solution containing 35% iron chloride (FeCl 2 ) and 65% water in the fluidized bed. The gas mixture emerging from the cyclone of the furnace is cooled, which leads to the condensation of 2.4 kg / h of an aqueous copper chloride solution (CuCL,) which contains 0.06 kg / h of zinc chloride (ZnCL 2 ). This solution was introduced into a mixing vessel, where 0.35 kg / h of iron filings were added. The suspension from the stirred vessel is passed through a filter, where 0.4 kg / h of cemented copper with about 90% Cu and 2.5 kg / h of a solution of 35% iron chloride are obtained. The latter is fed back into the fluidized bed. In order to limit its accumulation of zinc chloride, a certain proportion corresponding to 0.125 kg / h is taken from it, which is replaced by 20% hydrochloric acid in the same weight. This withdrawn portion can be treated in any known manner to utilize the iron and zinc chloride which it contains. An iron oxide mixture which contains less than 0.03% Cu and less than 0.01% Zn is taken from the fluidized bed furnace. The mixture is treated in a second fluidized bed furnace with a gas, resulting from the incomplete combustion of C. and a CO ä / (CO + ILJ ratio of 17/3 has, at a temperature of 600 ° C, all iron oxides are thereby converted into magnetite (Fe 3 O 4 ), more than 98% of which is obtained by passing through a magnetic sieve.This magnetite contains the iron previously present in the ore and the iron used to separate the copper.
Claims (3)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR87887A FR1505161A (en) | 1966-12-16 | 1966-12-16 | Process for purifying iron oxides obtained by roasting sulphide ores |
FR123049A FR1548471A (en) | 1967-10-02 | 1967-10-02 | |
FR134647A FR95128E (en) | 1967-10-02 | 1968-01-03 | Process for the purification of iron oxides resulting from the roasting of sulphide ores. |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1817160A1 DE1817160A1 (en) | 1972-01-05 |
DE1817160B2 true DE1817160B2 (en) | 1974-02-28 |
Family
ID=27243762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1817160A Withdrawn DE1817160B2 (en) | 1966-12-16 | 1968-12-27 | Process for cleaning oxidic iron ores |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE726028A (en) |
BR (1) | BR6905298D0 (en) |
CY (1) | CY627A (en) |
DE (1) | DE1817160B2 (en) |
GB (1) | GB1242043A (en) |
-
1968
- 1968-12-24 BE BE726028D patent/BE726028A/xx unknown
- 1968-12-27 DE DE1817160A patent/DE1817160B2/en not_active Withdrawn
-
1969
- 1969-01-02 BR BR205298/69A patent/BR6905298D0/en unknown
- 1969-01-03 GB GB573/69A patent/GB1242043A/en not_active Expired
-
1972
- 1972-01-25 CY CY62772A patent/CY627A/en unknown
Also Published As
Publication number | Publication date |
---|---|
BR6905298D0 (en) | 1973-01-25 |
CY627A (en) | 1972-01-25 |
DE1817160A1 (en) | 1972-01-05 |
GB1242043A (en) | 1971-08-11 |
BE726028A (en) | 1969-06-24 |
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