EP0091560B1 - Process for producing titanium dioxide concentrates - Google Patents
Process for producing titanium dioxide concentrates Download PDFInfo
- Publication number
- EP0091560B1 EP0091560B1 EP83102302A EP83102302A EP0091560B1 EP 0091560 B1 EP0091560 B1 EP 0091560B1 EP 83102302 A EP83102302 A EP 83102302A EP 83102302 A EP83102302 A EP 83102302A EP 0091560 B1 EP0091560 B1 EP 0091560B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- titanium oxide
- temperatures
- iron
- titanium dioxide
- chlorine
- 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.)
- Expired
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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
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1204—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
- C22B34/1209—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by dry processes, e.g. with selective chlorination of iron or with formation of a titanium bearing slag
Definitions
- the present invention relates to a process for the production of titanium dioxide concentrates by removing the iron from titanium oxide-containing material containing iron oxides with the aid of chlorine-containing gases without the addition of carbon at temperatures of 800 to 1,300 ° C.
- a method for producing a titanium dioxide concentrate from ilmenite ore is known from US Pat. No. 3,803,287, in which the ore fluidized with air is first roasted oxidatively at temperatures above 850 ° C. before the oxidized ore after mixing with it finely divided coal is chlorinated at a temperature of about 900 ° C in a fluidization zone, with ferric chloride escaping through the gas phase.
- the chlorination is stopped.
- the remaining iron (III) chloride is finally removed from the chlorinated ore removed from the fluidization zone by leaching with dilute mineral acid.
- the process for the production of artificial rutile according to US-A-3 950 489 has a total of five stages.
- ilmenite ore is oxidatively roasted at temperatures of 900 to 1 050 ° C.
- the oxidized roasted ore is chlorinated in the presence of up to 10% by weight of coal in a fluid bed.
- an artificial rutile with a high Ti0 2 content is obtained from the chlorinated ore by magnetic separation, with the help of a vibrating water jet and by electrostatic separation.
- the ilmenite is heated in a fluidized bed reactor in a nitrogen stream at 900 ° C. for 2 hours.
- the resulting material is mixed with anthracite and heated to 950 ° C for one hour.
- the reduced material is magnetically separated from the unused anthracite.
- the anthracite-free material is finally leached with boiling hydrochloric acid, with the leaching residue consisting of over 90% Ti0 2 .
- iron is removed from material containing titanium oxide by either allowing the material containing titanium oxide to move in the direction of gravity at temperatures of 800 to 1,300 ° C. and doing so with at least 70 Volume% chlorine and possibly an inert gas existing gas mixture treated in countercurrent or whirled up with the gas mixture.
- Titanium oxide tends to sinter at higher temperatures. Sintered titanium oxide-containing material reacts only very slowly with a chlorine-containing gas mixture, so that the reaction of the chlorine takes place essentially only on the surface of compact pieces of the titanium oxide-containing material. Even if the material containing titanium oxide is whirled up with the chlorine-containing gas mixture, sintering effects occur if the gas distribution is uneven.
- ilmenite main constituents: FeTi0 3 , Fe 2 0 3 , Ti0 2
- leukoxene weathering product of ilmenite
- titanium magnetite main constituents: Fe 3 0 4 , Fe z 0 3 , TiO 2
- TiO 2 titanium oxide-containing material
- the vanadium when using a material containing titanium oxide, which also contains oxidically bound vanadium, the vanadium is simultaneously volatilized as chloride or oxychloride.
- the titanium oxide-containing material remains largely free-flowing when annealed in an inert gas atmosphere, for example under nitrogen.
- an inert gas atmosphere for example under nitrogen.
- the titanium oxide-containing material is annealed in an oxidizing atmosphere, for example in air, compact parts are formed which preferably have to be comminuted by grinding.
- the treatment with chlorine-containing gases can also be carried out at rest.
- Example 4 was repeated with the modification that, before its chlorination, the ilmenite was calcined in air instead of under nitrogen and then finely ground (grain size: 60 to 600 ⁇ m).
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Titandioxid-Konzentraten durch Entfernen des Eisens aus Eisenoxide aufweisendem titanoxidhaltigem Material mit Hilfe von chlorhaltigen Gasen ohne Zusatz von Kohlenstoff bei Temperaturen von 800 bis 1 300 °C.The present invention relates to a process for the production of titanium dioxide concentrates by removing the iron from titanium oxide-containing material containing iron oxides with the aid of chlorine-containing gases without the addition of carbon at temperatures of 800 to 1,300 ° C.
Aus der US-A-3 803 287 ist ein Verfahren zur Herstellung eines Titandioxid-Konzentrates aus Ilmenit-Erz bekannt, bei welchem zunächst das mit Luft fluidisierte Erz bei Temperaturen oberhalb von 850 °C oxidierend geröstet wird, bevor das oxidierte Erz nach Vermischung mit feinteiliger Kohle bei einer Temperatur von etwa 900 °C in einer Fluidisierungszone chloriert wird, wobei Eisen-III-chlorid über die Gasphase austritt. Wenn der Eisengehalt des chlorierten Erzes auf 4 bis 6 % verringert worden ist, wird die Chlorierung abgebrochen. Aus dem aus der Fluidisierungszone entnommenen chlorierten Erz wird schließlich durch Auslaugen mit verdünnter Mineralsäure das restliche Eisen-III-chlorid entfernt.A method for producing a titanium dioxide concentrate from ilmenite ore is known from US Pat. No. 3,803,287, in which the ore fluidized with air is first roasted oxidatively at temperatures above 850 ° C. before the oxidized ore after mixing with it finely divided coal is chlorinated at a temperature of about 900 ° C in a fluidization zone, with ferric chloride escaping through the gas phase. When the iron content of the chlorinated ore has been reduced to 4 to 6%, the chlorination is stopped. The remaining iron (III) chloride is finally removed from the chlorinated ore removed from the fluidization zone by leaching with dilute mineral acid.
Das Verfahren zur Herstellung von künstlichem Rutil nach der US-A-3 950 489 verläuft über insgesamt fünf Stufen. In einer ersten Stufe wird Ilmenit-Erz bei Temperaturen von 900 bis 1 050 °C oxidierend geröstet, während das oxidierend geröstete Erz in einer zweiten Stufe in Anwesenheit von bis zu 10 Gewichts% Kohle in einem Fließbett chloriert wird. In den folgenden Stufen wird aus dem chlorierten' Erz durch Magnetscheidung, mit Hilfe eines vibrierenden Wasserstrahles sowie durch elektrostatische Trennung ein künstlicher Rutil mit hohem Ti02-Gehalt erhalten.The process for the production of artificial rutile according to US-A-3 950 489 has a total of five stages. In a first stage, ilmenite ore is oxidatively roasted at temperatures of 900 to 1 050 ° C., while in a second stage the oxidized roasted ore is chlorinated in the presence of up to 10% by weight of coal in a fluid bed. In the following stages, an artificial rutile with a high Ti0 2 content is obtained from the chlorinated ore by magnetic separation, with the help of a vibrating water jet and by electrostatic separation.
Beim Verfahren zur Aufbereitung eines verwitterten Ilmenits nach der US-A-3 875 286 wird der Ilmenit in einem Fließbettreaktor in einem Stickstoffstrom 2 Stunden auf 900 °C erhitzt. Das resultierende Material wird mit Anthrazit vermischt und eine Stunde auf 950 °C erhitzt. Nach Abkühlung wird das reduzierte Material magnetisch vom nichtverbrauchten Anthrazit abgetrennt. Das anthrazitfreie Material wird schließlich mit kochender Salzsäure ausgelaugt, wobei der Laugungsrückstand zu über 90 % aus Ti02 besteht.In the process for the preparation of a weathered ilmenite according to US Pat. No. 3,875,286, the ilmenite is heated in a fluidized bed reactor in a nitrogen stream at 900 ° C. for 2 hours. The resulting material is mixed with anthracite and heated to 950 ° C for one hour. After cooling, the reduced material is magnetically separated from the unused anthracite. The anthracite-free material is finally leached with boiling hydrochloric acid, with the leaching residue consisting of over 90% Ti0 2 .
Aus der US-A-2 184 885 ist ein Verfahren zur Entfernung von Eisen aus einem Eisen-Titan-Erz bekannt, bei welchem eine innige Mischung des Erzes mit 1 bis 12 Gewichts% Kohlenstoff bei Temperaturen über 500 °C chloriert wird, wobei der Hauptteil des Eisens und merkliche Mengen Titan als Chloride verdampfen. Der verbleibende Rückstand besteht im wesentlichen aus Titandioxid mit nur geringem Eisengehalt.From US-A-2 184 885 a method for removing iron from an iron-titanium ore is known, in which an intimate mixture of the ore is chlorinated with 1 to 12% by weight of carbon at temperatures above 500 ° C., the Most of the iron and significant amounts of titanium evaporate as chlorides. The remaining residue consists essentially of titanium dioxide with only a low iron content.
Nach einem älteren Vorschlag (publizierte europäische Patentanmeldung Nr. 85 345) wird Eisen aus titanoxidhaltigem Material dadurch entfernt, daß man das titanoxidhaltige Material bei Temperaturen von 800 bis 1 300 °C entweder sich in Richtung der Schwerkraft bewegen läßt und dabei mit einem aus mindestens 70 Volumen% Chlor und gegebenenfalls einem Inertgas bestehenden Gasgemisch im Gegenstrom behandelt oder mit dem Gasgemisch aufwirbelt.According to an older proposal (published European patent application No. 85 345), iron is removed from material containing titanium oxide by either allowing the material containing titanium oxide to move in the direction of gravity at temperatures of 800 to 1,300 ° C. and doing so with at least 70 Volume% chlorine and possibly an inert gas existing gas mixture treated in countercurrent or whirled up with the gas mixture.
Titanoxidhaltiges Material neigt dazu, bei höheren Temperaturen zu sintern. Gesintertes titanoxidhaltiges Material reagiert aber mit einem chlorhaltigem Gasgemisch nur sehr langsam, so daß die Reaktion des Chlors im wesentlichen nur an der Oberfläche von kompakten Stücken des titanoxidhaltigen Materials erfolgt. Auch wenn man das titanoxidhaltige Material mit dem chlorhaltigen Gasgemisch aufwirbelt, kommt es zu Sintereffekten, wenn die Gasverteilung ungleichmäßig ist.Material containing titanium oxide tends to sinter at higher temperatures. Sintered titanium oxide-containing material reacts only very slowly with a chlorine-containing gas mixture, so that the reaction of the chlorine takes place essentially only on the surface of compact pieces of the titanium oxide-containing material. Even if the material containing titanium oxide is whirled up with the chlorine-containing gas mixture, sintering effects occur if the gas distribution is uneven.
Es ist daher Aufgabe der vorliegenden Erfindung, ein Verfahren zur Herstellung von Titandioxid-Konzentraten durch Behandeln von titanoxidhaltigem Material ohne Zusatz von Kohlenstoff mit chlorhaltigen Gasen bei höheren Temperaturen anzugeben, bei welchem ein Sintern des titanoxidhaltigen Materials verhindert wird. Das wird erfindungsgemäß dadurch erreicht, daß man das titanoxidhaltige Material vorher bei Temperaturen von 900 bis 1 300 °C unter Inertgas glüht.It is therefore an object of the present invention to provide a process for the production of titanium dioxide concentrates by treating titanium oxide-containing material without adding carbon with chlorine-containing gases at elevated temperatures, in which sintering of the titanium oxide-containing material is prevented. This is achieved according to the invention by previously annealing the titanium oxide-containing material at temperatures of 900 to 1,300 ° C. under an inert gas.
Das Verfahren gemäß der Erfindung kann wahlweise auch noch dadurch ausgestaltet sein, daß.
- a) man das titanoxidhaltige Material vorher bei Temperaturen bis zu 1 050 °C glüht ;
- b) das titanoxidhaltige Material Korngrößen von 20 bis 1 000 µm aufweist.
- a) the titanium oxide-containing material is previously annealed at temperatures up to 1 050 ° C;
- b) the titanium oxide-containing material has grain sizes of 20 to 1,000 microns.
Beim erfindungsgemäßen Verfahren können als titanoxidhaltiges Material insbesondere Ilmenit (Hauptbestandteile : FeTi03, Fe203, Ti02), Leukoxen (Verwitterungsprodukt des Ilmenits) oder Titanomagnetit (Hauptbestandteile : Fe304, Fez03, TiO2) eingesetzt werden.In the process according to the invention, in particular ilmenite (main constituents: FeTi0 3 , Fe 2 0 3 , Ti0 2 ), leukoxene (weathering product of ilmenite) or titanium magnetite (main constituents: Fe 3 0 4 , Fe z 0 3 , TiO 2 ) can be used as the titanium oxide-containing material .
Beim Verfahren gemäß der Erfindung wird bei der Verwendung eines titanoxidhaltigen Materials, welches auch oxidisch gebundenes Vanadium enthält, gleichzeitig das Vanadium als Chlorid oder Oxychlorid verflüchtigt.In the method according to the invention, when using a material containing titanium oxide, which also contains oxidically bound vanadium, the vanadium is simultaneously volatilized as chloride or oxychloride.
Beim erfindungsgemäßen Verfahren bleibt das titanoxidhaltige Material beim Glühen in Inertgasatmosphäre, beispielsweise unter Stickstoff, weitestgehend rieselfähig. Glüht man jedoch das titanoxidhaltige Material in oxidierender Atmosphäre, beispielsweise in Luft, so bilden sich kompakte Teile, welche vorzugsweise durch Mahlen zerkleinert werden müssen.In the process according to the invention, the titanium oxide-containing material remains largely free-flowing when annealed in an inert gas atmosphere, for example under nitrogen. However, if the titanium oxide-containing material is annealed in an oxidizing atmosphere, for example in air, compact parts are formed which preferably have to be comminuted by grinding.
Da das gemäß der Erfindung behandelte titanoxidhaltige Material praktisch keine Neigung zum Sintern mehr zeigt, kann die Behandlung mit chlorhaltigen Gasen auch anruhenden Schüttungen durchgeführt werden.Since the titanium oxide-containing material treated according to the invention shows practically no tendency to sinter, the treatment with chlorine-containing gases can also be carried out at rest.
In den folgenden Beispielen bedeuten die Prozentangaben, wenn nichts anderes vermerkt ist, Gewichtsprozente.In the following examples, the percentages mean percentages by weight, unless stated otherwise.
200 g Ilmenit einer Korngröße von 60 bis 200 µm sowie der Zusammensetzung 53,5 % Ti02, 32 % Eisen und 0,07 % Vanadium wurden in ein Quarzrohr (50 mm 0) eingefüllt und unter Stickstoff 30 Minuten bei 200 °C getrocknet. Anschließend wurde der Stickstoff durch Chlorgas (30 I/h) ersetzt und die Reaktionszone auf 1 000 °C erhitzt. Nach 45 Minuten ließ die anfänglich kräftige FeCl3-Entwicklung nach. Die Chlorierung wurde insgesamt 3 Stunden durchgeführt. Nach dem Abkühlen zeigte sich, daß die Schüttung nur an der Oberfläche mit einem nahezu weißen, lockeren Pulver bedeckt war. Der Rest der Schüttung war zu einem kompakten Stück gesintert, welches mit dem Chlorgas offensichtlich nicht reagiert hatte. Die Gewichtsabnahme betrug nur 23,0 g.200 g ilmenite with a grain size of 60 to 200 µm and the composition 53.5% Ti0 2 , 32% iron and 0.07% vanadium were placed in a quartz tube (50 mm 0) and dried under nitrogen at 200 ° C for 30 minutes. The nitrogen was then replaced by chlorine gas (30 l / h) and the reaction zone was heated to 1000 ° C. After 45 minutes, the initially vigorous FeCl 3 development subsided. The chlorination was carried out for a total of 3 hours. After cooling, it was found that the bed was only covered on the surface with an almost white, loose powder. The rest of the bed was sintered into a compact piece that obviously hadn't reacted with the chlorine gas. The weight loss was only 23.0 g.
40 g Ilmenit der Korngröße und Zusammensetzung gemäß Beispiel 1 wurden mit 8 g Koks (Korngröße : < 200 µm) vermengt und in ein senkrecht angeordnetes Quarzrohr (50 mm 0) mit eingeschmolzener Fritte eingefüllt. Unter Durchleiten von Stickstoff wurde 30 Minuten bei 200 °C getrocknet. Dann wurde der Stickstoff durch Chlorgas (40 I/h) ersetzt und die Temperatur schnell auf 850 °C erhöht. Sobald neben der anfangs kräftigen FeCl3-Entwicklung die beginnende TiCl4-Bildung beobachtet wurde, wurde die Chlorgas-Zufuhr abgebrochen und zur Verbrennung des überschüssigen Kokses Luft (100 I/h) durchgeleitet. Nach dem Öffnen der Apparatur zeigte sich, daß sich ein kompakter, von Kanälen durchzogener Körper gebildet hatte. Da das Chlorgas offensichtlich nur an der Oberfläche der Kanäle reagiert hatte, betrug die Gewichtsabnahme lediglich 13,2 g.40 g of ilmenite of the grain size and composition according to Example 1 were mixed with 8 g of coke (grain size: <200 μm) and poured into a vertically arranged quartz tube (50 mm 0) with a melted frit. Drying was carried out at 200 ° C. for 30 minutes while passing nitrogen through. Then the nitrogen was replaced by chlorine gas (40 l / h) and the temperature was quickly raised to 850 ° C. As soon as the beginning of TiCl 4 formation was observed in addition to the initially vigorous FeCl 3 development, the chlorine gas supply was stopped and air (100 l / h) was passed through to burn off the excess coke. After opening the apparatus, it appeared that a compact body with channels was formed. Since the chlorine gas had obviously only reacted on the surface of the channels, the weight loss was only 13.2 g.
80 g Ilmenit der Korngräße und Zusammensetzung gemäß Beispiel 1 wurden nach einstündigem Glühen unter Stickstoff bei 1 000 °C in ein senkrecht angeordnetes Quarzrohr (50 mm 0) mit eingeschmolzener Fritte eingefüllt und unter Durchleiten von Chlorgas (30 I/h) auf 1 000 °C erhitzt. Nach einer Reaktionszeit von 3 Stunden wurde praktisch kein gasförmiges Eisen-III-chlorid mehr entwickelt.80 g of ilmenite of the grain size and composition according to Example 1 were, after annealing for 1 hour under nitrogen at 1,000 ° C., poured into a vertically arranged quartz tube (50 mm 0) with melted frit and passed through to 1000 ° C. with chlorine gas (30 l / h) C. heated. After a reaction time of 3 hours, practically no gaseous ferric chloride was developed.
Als Rückstand verblieben im Quarzrohr 43,0 g eines lockeren, rieselfähigen, hellen Pulvers mit einem Ti02-Gehalt von 98,0% sowie mit 0,2% Fe203 und weniger als 0,001% V205.43.0 g of a loose, free-flowing, bright powder with a Ti0 2 content of 98.0% and with 0.2% Fe 2 0 3 and less than 0.001% V 2 0 5 remained in the quartz tube.
80 g Ilmenit der Korngröße und Zusammensetzung gemäß Beispiel 1 wurden nach einstündigem Glühen unter Stickstoff bei 1 000 °C in ein senkrecht angeordnetes Quarzrohr (50 mm 0) mit eingeschmolzener Fritte eingefüllt und unter Durchleiten von Chlorgas (100 I/h) auf 950 °C erhitzt. Nach einer Reaktionszeit von 75 Minuten wurde praktisch kein gasförmiges Eisen-III-chlorid mehr entwickelt.80 g of ilmenite with the grain size and composition according to Example 1 were, after annealing for 1 hour under nitrogen at 1,000 ° C., filled into a vertically arranged quartz tube (50 mm 0) with melted frit and passed through chlorine gas (100 l / h) to 950 ° C. heated. After a reaction time of 75 minutes, practically no gaseous ferric chloride was developed.
Als Rückstand verblieben im Quarzrohr 44,5 g eines hellen, rieselfähigen Pulvers mit einem Ti02-Gehalt von 97,2 % sowie mit 0,6 % Fe203 und 0,001 % V2O5.44.5 g of a bright, free-flowing powder with a TiO 2 content of 97.2% and with 0.6% Fe 2 0 3 and 0.001% V 2 O 5 remained in the quartz tube.
Beispiel 4 wurde mit der Abändering wiederholt, daß der Ilmenit vor seiner Chlorierung anstelle von unter Stickstoff an der Luft geglüht und anschließend fein gemörsert wurde (Korngröße : 60 bis 600 µm).Example 4 was repeated with the modification that, before its chlorination, the ilmenite was calcined in air instead of under nitrogen and then finely ground (grain size: 60 to 600 μm).
Als Rückstand verblieben im Quarzrohr 44,8 g eines hellen, rieselfähigen Rückstandes mit einem TiOz-Gehalt von 97,0 % sowie mit 0,6 % Fe203 und 0,001 % V2O5.44.8 g of a bright, free-flowing residue with a TiO z content of 97.0% and with 0.6% Fe 2 0 3 and 0.001% V 2 O 5 remained in the quartz tube.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823210729 DE3210729A1 (en) | 1982-03-24 | 1982-03-24 | METHOD FOR PRODUCING TITANIUM DIOXIDE CONCENTRATES |
| DE3210729 | 1982-03-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0091560A1 EP0091560A1 (en) | 1983-10-19 |
| EP0091560B1 true EP0091560B1 (en) | 1986-05-28 |
Family
ID=6159119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83102302A Expired EP0091560B1 (en) | 1982-03-24 | 1983-03-09 | Process for producing titanium dioxide concentrates |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4517163A (en) |
| EP (1) | EP0091560B1 (en) |
| AU (1) | AU550812B2 (en) |
| CA (1) | CA1213418A (en) |
| DE (2) | DE3210729A1 (en) |
| NO (1) | NO831042L (en) |
| ZA (1) | ZA832015B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4629607A (en) * | 1984-12-27 | 1986-12-16 | Michel Gueguin | Process of producing synthetic rutile from titaniferous product having a high reduced titanium oxide content |
| DE4138516A1 (en) * | 1991-11-23 | 1993-05-27 | Luk Fahrzeug Hydraulik | PUMP |
| EP0641396B1 (en) * | 1992-05-21 | 1996-04-24 | E.I. Du Pont De Nemours And Company | Improved method for beneficiating titanium-bearing material containing iron |
| JP3733599B2 (en) * | 1993-08-11 | 2006-01-11 | 住友化学株式会社 | Metal oxide powder and method for producing the same |
| US7611588B2 (en) * | 2004-11-30 | 2009-11-03 | Ecolab Inc. | Methods and compositions for removing metal oxides |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3803287A (en) * | 1971-04-07 | 1974-04-09 | Mitsubishi Metal Mining Co Ltd | Method for producing titanium concentrate |
| US3950489A (en) * | 1973-03-16 | 1976-04-13 | Mitsubishi Kinzoku Kabushiki Kaisha | Chlorine treatment of titaniferous ores |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1845342A (en) * | 1928-02-02 | 1932-02-16 | Vanadium Corp | Treatment of titanium and iron containing materials |
| US2184884A (en) * | 1938-04-30 | 1939-12-26 | Pittsburgh Plate Glass Co | Treatment of titanium ores |
| US2184885A (en) * | 1938-04-30 | 1939-12-26 | Pittsburgh Plate Glass Co | Treatment of titanium ores |
| US2852362A (en) * | 1955-06-21 | 1958-09-16 | Nat Lead Co | Process for forming titanium concentrates |
| US2933373A (en) * | 1957-05-06 | 1960-04-19 | Titanium Metals Corp | Beneficiation of titaniferous iron ores |
| US3159454A (en) * | 1960-09-26 | 1964-12-01 | Barnard O Wilcox | Recovering tio2 from ilmenite |
| GB1359882A (en) * | 1971-01-27 | 1974-07-17 | Laporte Industries Ltd | Beneficiation of ores |
| CA966669A (en) * | 1972-02-14 | 1975-04-29 | Michael Robinson | Beneficiation of ilmenite ores |
| AU504225B2 (en) * | 1975-10-17 | 1979-10-04 | Titanium Technology (Aust.) Ltd. | Oxidation of titaniferous ores |
-
1982
- 1982-03-24 DE DE19823210729 patent/DE3210729A1/en not_active Withdrawn
-
1983
- 1983-02-23 CA CA000422234A patent/CA1213418A/en not_active Expired
- 1983-02-24 US US06/469,220 patent/US4517163A/en not_active Expired - Fee Related
- 1983-03-09 EP EP83102302A patent/EP0091560B1/en not_active Expired
- 1983-03-09 DE DE8383102302T patent/DE3363684D1/en not_active Expired
- 1983-03-23 NO NO831042A patent/NO831042L/en unknown
- 1983-03-23 AU AU12752/83A patent/AU550812B2/en not_active Ceased
- 1983-03-23 ZA ZA832015A patent/ZA832015B/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3803287A (en) * | 1971-04-07 | 1974-04-09 | Mitsubishi Metal Mining Co Ltd | Method for producing titanium concentrate |
| US3950489A (en) * | 1973-03-16 | 1976-04-13 | Mitsubishi Kinzoku Kabushiki Kaisha | Chlorine treatment of titaniferous ores |
Also Published As
| Publication number | Publication date |
|---|---|
| NO831042L (en) | 1983-09-26 |
| DE3210729A1 (en) | 1983-10-06 |
| AU550812B2 (en) | 1986-04-10 |
| ZA832015B (en) | 1983-12-28 |
| US4517163A (en) | 1985-05-14 |
| AU1275283A (en) | 1983-09-29 |
| CA1213418A (en) | 1986-11-04 |
| EP0091560A1 (en) | 1983-10-19 |
| DE3363684D1 (en) | 1986-07-03 |
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