EP0318231A1 - Procédé de récupération de fines de dioxyde de titane - Google Patents

Procédé de récupération de fines de dioxyde de titane Download PDF

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Publication number
EP0318231A1
EP0318231A1 EP88311004A EP88311004A EP0318231A1 EP 0318231 A1 EP0318231 A1 EP 0318231A1 EP 88311004 A EP88311004 A EP 88311004A EP 88311004 A EP88311004 A EP 88311004A EP 0318231 A1 EP0318231 A1 EP 0318231A1
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EP
European Patent Office
Prior art keywords
feed
titanium dioxide
middlings
streams
weight
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Withdrawn
Application number
EP88311004A
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German (de)
English (en)
Inventor
Richard B. Peterson
Kay Peterson Muller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EXTRACT Inc
Original Assignee
EXTRACT Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EXTRACT Inc filed Critical EXTRACT Inc
Publication of EP0318231A1 publication Critical patent/EP0318231A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • C22B34/1236—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 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching
    • C22B34/1259—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 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching treatment or purification of titanium containing solutions or liquors or slurries

Definitions

  • This invention relates to a process for recovering titanium dioxide and, more particularly, but not exclusively, to a process for recovering titanium dioxide fines that are in the form of particulate waste such as blow-over dust, cyclone solids and the like.
  • Titanium dioxide fines having a Tyler Standard screen mesh size of about 6 or finer, more often about 28 or finer, and in many instances about 200 or finer are produced as by-products of various titanium compound production facilities such as, for example, titanium dioxide pigment plants and titanium tetrachloride plants. These fines are also produced as by-products in the mining of ilmenite and/or rutile. They are typically found in the waste streams of such titanium compound production facilities and mining operations and are usually disposed of in settling ponds and the like.
  • waste streams and settling ponds often contain other by-products such as coke, silica, and the chlor­ides and oxychlorides of various metals such as iron, vanadium, nickel, niobium, silver, tantalum, and the like. These fines have generally been regarded as waste products because it has not been economical to recover them in a usable manner.
  • This invention provides for a process for recov­ering titanium dioxide from a feed comprising titanium dioxide fines, the process comprising:
  • the titanium dioxide fines that can be recov­ered in accordance with the inventive process typically have a Tyler Standard screen size of about 6 or finer, preferably about 28 or finer.
  • Preferred particulate fines that can be recovered have a Tyler Standard screen size in the range of about 6 to about 600, more preferivelyably about 28 to about 600.
  • these fines have a Tyler Standard screen size in the range of about 6 to about 400, more preferably about 28 to about 400.
  • These fines are sometimes referred to in the art as "blow-over dust" or "cyclone solids".
  • Blow-over dust refers to the fact that the fines were entrained with a gaseous effluent of, for example, a fluidized bed reac­tor.
  • Cyclone solids refers to the fact that the fines were collected in a cyclone.
  • titanium dioxide fines are typically produced as by-products of titanium compound production processes (e.g., titanium dioxide pigment processes, titanium tetrachloride processes, and the like), rutile and ilmenite mining processes, and the like. These fines are usually found in the waste streams of such proces­ ses, and are typically disposed of in settling ponds, settling tanks and the like. The feed that is processed in accordance with inventive process is taken from these waste streams, settling ponds, settling tanks and the like.
  • titanium compound production processes e.g., titanium dioxide pigment processes, titanium tetrachloride processes, and the like
  • rutile and ilmenite mining processes e.g., rutile and ilmenite mining processes, and the like.
  • This feed typically contains, in addition to such titanium dioxide fines, other waste materials such as coke (or carbon), silica, and the chlorides and oxychlor­ides of various metals such as iron, vanadium, nickel, niobium, silver, tantalum and the like.
  • the titanium dioxide fines can be in the form of titanium dioxide, rutile or ilmenite.
  • the titanium dioxide fines can also be in the form of titanium-bearing compounds such as titanium-bearing ore and/or titanium-bearing slag.
  • the coke can be in the form of petroleum coke and/or bitumin­ous coke.
  • the silica can be in the form of silica, quartz and/or calcined quartz.
  • While the feed composi­tion is dependent upon the particular process from which it is derived, it generally contains from about 20% to about 60% by weight solids, more typically from about 25% to about 50% by weight solids; and generally from about 40% to about 80% by weight liquid, more typically from about 50% to about 75% by weight liquid.
  • the solids generally comprise from about 1% to about 50% by weight titanium dioxide, more typically from about 5% to about 40% by weight titanium dioxide; and generally from about 30% to about 99% coke, more typically from about 50% to about 95% by weight coke.
  • the solids usually contain from about 10% to about 40% by weight titanium dioxide, from about 50% to about 80% by weight coke, and from about 10% to about 20% by weight silica.
  • the liquid typically consists primarily of water, but can include acids such as hydrochloric acid and various dissolved metal chlorides and metal oxychlorides such as vanadium, nickel, niobium, silver, tantalum, and the like, at levels in the range of up to about 8% by weight.
  • acids such as hydrochloric acid and various dissolved metal chlorides and metal oxychlorides such as vanadium, nickel, niobium, silver, tantalum, and the like, at levels in the range of up to about 8% by weight.
  • the feed is advanced to screen separator 10 to remove oversized particulate matter from the feed.
  • Particulate solids having a Tyler Standard screen size of about 6 or larger, preferably about 28 or larger, are removed from the feed as oversized solids.
  • Screen separator 10 is entirely conventional and can be, for example, a vibrating screen, a shaking screen, an oscillating screen, a reciprocating screen, a gyratory screen, etc.
  • a Derrick Model J24-36-MS-1 vibrating screen adapted to separate out +28 Tyler Standard screen size solids is useful. Wash water can be added to the screen to enhance separation during screening.
  • the ratio of wash water to feed that is added to screen 10 is dependent upon the nature and composition of the feed but can range up to, for example, about 6 gallons of water per dry net ton of feed.
  • Feed and wash water passing through screen 10 are advanced to holding tank 12 where they are mixed with additional water plus filtrate recycled from filter 44 and overflow from cyclone 42, as discussed in greater detail below.
  • the contents of tank 12 typically comprise about 12% to about 22% by weight solids, and about 78% to about 88% by weight liquid.
  • the solids in tank 12 usually com­prise from about 1% to about 50% by weight titanium dioxide and from about 30% to about 99% by weight coke. Oversized solids from screen 10 are collected for waste.
  • the contents of tank 12 are advanced to cyclone 16 by pump 14.
  • Cyclone 16 is entirely conventional in design and preferably is adapted to separate out from the feed, as the cyclone overflow, liquids and particulate solids having a Tyler Standard screen size of about 600 or finer, generally about 400 or finer.
  • the overflow from cyclone 16 typically has a solids content in the range of about 1% to about 15% by weight and a liquid content of from about 85% to about 99% by weight.
  • the solids in the overflow typically have a titanium dioxide content of about 2% to about 10% by weight, and a coke content of about 30% to about 90% by weight.
  • the underflow typically has a solids content of about 30% to about 70% by weight and a liquid content of from about 30% to about 70% by weight.
  • the solids in the underflow typi­cally have a titanium dioxide content of about 5% to about 70% by weight and a coke content of about 15% to about 65% by weight.
  • Useful cyclones are available from Krebs Engineers under the names XZ Cyclones and Model D Cyclones.
  • the underflow from cyclone 16 is advanced to agitated tank 18 wherein it is agitated until it is advanced to stream splitter 22 by pump 20.
  • Recycled middlings from concentrator tables 24, 26, 28, 30, 32 and 34 which are discussed below, are combined with the underflow from cyclone 16 prior to entering stream split­ter 22.
  • the combined underflow from cyclone 16 and recycled middlings generally have a solids content in the range of about 30% to about 60% by weight and a liquid content in the range of about 40% to about 70% by weight.
  • the solids in the combined underflow and midd­lings generally have a titanium dioxide content of about 6% to about 70% by weight and a coke content of about 15% to about 65% by weight.
  • Stream splitter 22 is adaptively ed for dividing a slurry into a plurality of separate equal slurry streams.
  • a useful stream splitter is avail­able from the Deister Concentrator Company of Fort Wayne, Indiana under the name Deister Concenco Self-Pro­pelled Splitter, Six-Way.
  • the combined underflow and middlings are divided into six separate feed streams.
  • the separate feed streams from streams splitter 22 are advanced to concentrator tables 24, 26, 28, 30, 32 and 34, respectively.
  • the concentrator tables typi­cally have a riffled plane surface inclined slightly from the horizontal. Separation between titanium diox­ide and and the other solids in the feed is effected by flowing the feed across the plane surface which is differentially shaken in the direction of the long axis and washed with an even flow of water at right angles to the direction of motion. Separation depends mainly on the difference in specific gravity between the titanium dioxide and the other solids.
  • Useful concentrator tables are available from Deister under the names DEISTER 999 Diagonal-Deck Ore Concentrating Table and SUPER DUTY Diagonal-Deck No. 6 and No. 14 Concentrating Tables.
  • the feed stream that is processed on each of the concentrator tables is divided into three separate product streams.
  • the first of these separate product streams is a concentrate which has a relatively high concentration of titanium dioxide.
  • this concen­trate has a solids content of about 30% to about 60% by weight and a liquid content of about 40% to about 70% by weight.
  • the solids in the concentrate typically have a titanium dioxide content of about 90% to about 96% by weight, and a coke content of about 0.01% to about 1% by weight.
  • the second of these separate streams is the middlings which has a lower concentration of titanium dioxide than the concentrate.
  • the midlings has a solids content in the range of about 50% to about 70% by weight and a liquid content in the range of about 30% to about 50% by weight.
  • the solids in the middlings typically have a titanium dioxide content in the range of about 5% to about 70% by weight, and a coke content in the range of about 15% to about 55% by weight.
  • the third is the tailings which has a lower concentration of titanium dioxide than the middlings.
  • the tailings has a solids content in the range of about 5% to about 27% by weight and a liquid content in the range of about 73% to about 95% by weight.
  • the solids in the tailings typically have a titanium dioxide content in the range of about 1% to about 10% by weight, and a coke content in the range of about 20% to about 70% by weight.
  • the concentrate streams from each of the concen­trator tables are combined in tank 38.
  • the middlings from each of the concentrator tables are combined, mixed with water, added to the feed stream from tank 18 and recycled to stream splitter 22.
  • the tailings from each of the concentrator tables are combined and collected for waste.
  • the combined concentrate stream from tank 38 is advanced to cyclone 42 by pump 40.
  • the overflow from cyclone 42 is recycled to either or both of tanks 12 and 38. Typically, from about 15% to about 40% by weight of the overflow is recycled to tank 12, and from about 60% to about 85% by weight is recycled to tank 38.
  • the cyclone overflow consists primarily of liquid but can have a solids content of up to about 1% by weight.
  • the underflow from cyclone 42 typically has a solids content of about 85% to about 90% by weight and a liquid content in the range of about 10% to about 15% by weight.
  • the solids in the underflow typically has a titanium dioxide content in the range of about 90% to about 96% by weight, and a coke content in the range of about 0.01% to about 1% by weight.
  • the underflow from cyclone 42 is advanced to filter 44 wherein it is mixed with wash water and separ­ated into a filtrate and a filter cake.
  • filter 44 is entirely conventional in design and can be, for exam­ple, a belt-vacuum filter. Particularly useful is the Eimco horizontal belt-vacuum filter which is available from Eimco Process Equipment Company, Salt Lake City, Utah.
  • the filter cake from filter 44 is advanced to bin 46 and from there to dryer 48 wherein remaining moisture is evaporated and a dried product is removed.
  • the dried product preferably has a moisture content of about 3% by weight or less. Drying is preferably con­ducted at a temperature in the range of about 50°C to about 85°C.
  • the dried product typically has a titanium dioxide content of at least about 90% by weight, gen­erally from about 90% to about 96% by weight.
  • the dried product can be stored in bins until it is ready for use, and can be advanced to such bins by conventional means such as conveyors or bucket elevators.
  • the filtrate from filter 44 is advanced through trap 50 to tank 52, and then is recycled to tank 12 by pump 54.
  • the flow rates and compositions of the initial feed, the final dried product and the various intermediate streams are indi­cated in the following Table.
  • the screen 10 was a hand-held screen adapted for separating out particulate solids with a Tyler Standard screen size of 28 or larger.
  • the cyclone 16 was a one-inch cyclone. Instead of using cyclone 42, liquid was decanted off the top. Only one concentrator table was used rather than the six concentrator tables 24, 26, 28, 30, 32 and 34 depicted in the FIGURE.
  • the concentrator table that was used was a Deister single-deck ore concentrator table.
  • the stream splitter 22 was not used.
  • the filter 44 was a laboratory vacuum filter.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP88311004A 1987-11-25 1988-11-21 Procédé de récupération de fines de dioxyde de titane Withdrawn EP0318231A1 (fr)

Applications Claiming Priority (2)

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US12568587A 1987-11-25 1987-11-25
US125685 1987-11-25

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AU (1) AU2587688A (fr)
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0714992A1 (fr) 1994-12-01 1996-06-05 KRONOS TITAN-GmbH Procédé pour augmenter le rendement pour la chloruration de matériaux titanifères
US6138834A (en) * 1999-01-08 2000-10-31 Sun Drilling Corporation Recovery apparatus for drilling and excavation application and related methods
US6666335B1 (en) * 1999-10-29 2003-12-23 C.A.S.T. Minerals, Inc. Multi-mineral/ash benefication process and apparatus
US6892887B2 (en) 2003-02-10 2005-05-17 Alpine Mud Products Corp Polymer drilling bead recovery system and related methods
WO2007127028A1 (fr) 2006-04-27 2007-11-08 Tronox Llc Traitement de déchets ou de solides de cyclone provenant de la chloration de minerais contenant du titane
DE102008014722A1 (de) * 2007-12-05 2009-07-30 Kronos International, Inc. Verfahren zur Erhöhung der Ausbeute bei der Chlorierung titanhaltiger Rohstoffe
CN104190528A (zh) * 2014-08-29 2014-12-10 攀钢集团矿业有限公司 超细粒级钛铁矿的回收方法及钛精矿的生产方法
CN104925862A (zh) * 2015-07-15 2015-09-23 攀钢集团攀枝花钢铁研究院有限公司 处理含钛原料连续酸解产生的大颗粒的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE504843C (de) * 1928-09-02 1930-10-23 I G Farbenindustrie Akt Ges Gewinnung von Titandioxyd aus titanhaltigen Erzen
CA1088883A (fr) * 1977-11-01 1980-11-04 Petro-Canada Exploration Inc. Enrichissement par tamisage a sec de minerais lourds contenus dans les residus des sables bitumineux

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE504843C (de) * 1928-09-02 1930-10-23 I G Farbenindustrie Akt Ges Gewinnung von Titandioxyd aus titanhaltigen Erzen
CA1088883A (fr) * 1977-11-01 1980-11-04 Petro-Canada Exploration Inc. Enrichissement par tamisage a sec de minerais lourds contenus dans les residus des sables bitumineux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIST OF BUREAU OF MINES PUBLICATIONS AND ARTICLES, 1st January 1980 - 31st December 1984, page 88, no. RI 8737; J.I. PAIGE et al.: "Physical beneficiation of titanium plant solid wastes: recovery of titanium minerals and coke" *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0714992A1 (fr) 1994-12-01 1996-06-05 KRONOS TITAN-GmbH Procédé pour augmenter le rendement pour la chloruration de matériaux titanifères
US6399033B1 (en) * 1994-12-01 2002-06-04 Kronos, Inc. Process for increasing the yield in the manufacture of titanium dioxide by the chloride process
US6138834A (en) * 1999-01-08 2000-10-31 Sun Drilling Corporation Recovery apparatus for drilling and excavation application and related methods
USRE38367E1 (en) 1999-01-08 2003-12-30 Sun Drilling Products Corporation Recovery apparatus for drilling and excavation application and related methods
US6666335B1 (en) * 1999-10-29 2003-12-23 C.A.S.T. Minerals, Inc. Multi-mineral/ash benefication process and apparatus
US6892887B2 (en) 2003-02-10 2005-05-17 Alpine Mud Products Corp Polymer drilling bead recovery system and related methods
WO2007127028A1 (fr) 2006-04-27 2007-11-08 Tronox Llc Traitement de déchets ou de solides de cyclone provenant de la chloration de minerais contenant du titane
CN101432454B (zh) * 2006-04-27 2011-04-20 特诺有限公司 来自含钛矿物氯化的废弃固体或旋风固体的处理
US7943103B2 (en) 2006-04-27 2011-05-17 Tronox Llc Waste solids handling
AU2007243591B2 (en) * 2006-04-27 2011-09-15 Tronox Llc Processing of waste or cyclone solids from the chlorination of titanium bearing ores
JP4819157B2 (ja) * 2006-04-27 2011-11-24 トロノックス エルエルシー チタン鉱の塩素処理からの廃物又はサイクロン固体の処理
AU2007243591C1 (en) * 2006-04-27 2012-02-23 Tronox Llc Processing of waste or cyclone solids from the chlorination of titanium bearing ores
DE102008014722A1 (de) * 2007-12-05 2009-07-30 Kronos International, Inc. Verfahren zur Erhöhung der Ausbeute bei der Chlorierung titanhaltiger Rohstoffe
CN104190528A (zh) * 2014-08-29 2014-12-10 攀钢集团矿业有限公司 超细粒级钛铁矿的回收方法及钛精矿的生产方法
CN104925862A (zh) * 2015-07-15 2015-09-23 攀钢集团攀枝花钢铁研究院有限公司 处理含钛原料连续酸解产生的大颗粒的方法

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Publication number Publication date
FI885403A (fi) 1989-05-26
FI885403A0 (fi) 1988-11-22
AU2587688A (en) 1989-05-25

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