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WO2005116278A1 - Composition de matiere premiere d'alimentation destinee a un chlorateur a lit fluidise et procedes de fabrication correspondants - Google Patents

Composition de matiere premiere d'alimentation destinee a un chlorateur a lit fluidise et procedes de fabrication correspondants Download PDF

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Publication number
WO2005116278A1
WO2005116278A1 PCT/US2005/017455 US2005017455W WO2005116278A1 WO 2005116278 A1 WO2005116278 A1 WO 2005116278A1 US 2005017455 W US2005017455 W US 2005017455W WO 2005116278 A1 WO2005116278 A1 WO 2005116278A1
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WO
WIPO (PCT)
Prior art keywords
fluidized bed
chlorinator
binder
petroleum coke
mixture
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.)
Ceased
Application number
PCT/US2005/017455
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English (en)
Inventor
Harry Eugene Flynn
Robert A. 21007 NE 117th Street LITTLE
Lonnie G. Hewell
Ivan L. Price
Larry John Scott
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.)
Tronox LLC
Original Assignee
Kerr McGee Chemical LLC
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 Kerr McGee Chemical LLC filed Critical Kerr McGee Chemical LLC
Publication of WO2005116278A1 publication Critical patent/WO2005116278A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C22B34/1218—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 dry processes
    • C22B34/1222—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 dry processes using a halogen containing agent
    • 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
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • 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

Definitions

  • the current invention relates to improvements in the chloride process for manufacturing titanium dioxide.
  • the current invention relates to methods and compositions for improving the operating efficiencies of the chloride process.
  • the chloride process normally uses natural rutile ore.
  • synthetic rutiles usually made from ilmenite, and titanium-containing slags are also used in the chloride process.
  • the titanium dioxide contained within these materials is chlorinated to form titanium tetrachloride.
  • the resulting tetrachloride is oxidized in the gaseous phase back to titanium dioxide.
  • the ore and * coke are mixed in a fluidized bed reactor at temperatures of about 900° C and reacted with chlorine gas.
  • the reaction produces gaseous titanium tetrachloride which is transferred to a condensing system after being scrubbed of unreacted solids and certain other impurities.
  • the condensed tetrachloride is further purified by chemical treatment and distillation prior to being oxidized to titanium dioxide.
  • Current systems commonly use ore and coke particles larger than about 225 ⁇ m in order to minimize the loss of raw material during the fluidization process.
  • attrition and the reaction process reduce the size of the raw materials.
  • blow-over losses typically begin as particle sizes drop below -140 U.S.
  • blow-over particles require further processing in order to be usable in the chlorination process.
  • Efforts have been made as a consequence to agglomerate and sinter blow-over ore.
  • binders which adversely affect the chlorinator or do not retain their structure under reactor conditions.
  • Inorganic binders such as bentonite, sodium silicate and other inorganic substances inherently contain elements or species that contribute to fouling of the fluidization bed.
  • Organic binders such as coal tar are sufficient to agglomerate blow- over particles at room temperature; however, they tend to disintegrate upon introduction into the chlorinator releasing the blow-over fines prior to their reaction.
  • the current invention seeks to overcome the problems currently experienced by the titanium dioxide industry by providing methods and compositions for recovering and using blow-over fines as reactants in the chlorination process. Additionally, the current invention provides methods and compositions which increase the available virgin raw materials for use in the chloride process for manufacturing titanium dioxide. In one aspect, the current invention provides novel feedstock compositions and methods for preparing the same for use in a titanium ore chlorinator. In a first embodiment, the method of the current invention comprises blending particles of titanium ore, particularly those of a size previously unsuitable for use in a fluidized bed chlorinator, with a binder.
  • the method comprises blending petroleum coke particles, particularly those of a size or character previously unsuitable for use in a fluidized bed chlorinator, with a binder. Thereafter the mixture is fed to a briquetter or other suitable device and formed into briquettes. Following drying, the resulting coke briquettes display a sufficient crush strength to permit use within a fluidized bed chlorinator, typically at least 13.6 kg.
  • the method comprises blending particles of the titanium ore and petroleum coke with a binder. Thereafter the mixture is fed to a briquetter and formed into briquettes. Following drying, the resulting ore/coke composition has sufficient crush strength to permit use within a fluidized bed chlorinator. Typically, the briquettes of the current invention have a crush strength of at least 13.6 kg. Still further, the current invention provides a method for preparing a feedstock composition for a fluidized bed chlorination reactor which comprises forming an initial mixture comprising such titanium ore, petroleum coke, binder and pigmentary titanium dioxide. Sufficient water is added to the initial mixture to yield a final mixture.
  • the resulting final mixture is formed into briquettes by a briquetter or other suitable device. Following drying, the resulting briquettes have sufficient crush strength to permit use within a fluidized bed chlorination reactor. Normally, crush strengths of at least 13.6 kg will be sufficient for use in a fluidized bed chlorinator.
  • the current invention provides a method for chlorinating titanium ore, including recovering titanium ore and/or petroleum coke lost as blow-over from a fluidized bed chlorinator.
  • the method comprises the steps of combining the recovered titanium ore, the recovered petroleum coke or both the recovered ore and coke with a binder, optionally with pigmentary titanium dioxide, fresh, unrecovered ore and/or coke, and forming the mixture into briquettes by application of pressure.
  • the briquettes are dried and returned to the fluidized bed chlorinator. 1.
  • Methods for Preparing Chlorinator Feedstocks As noted above, previous attempts to recover and recycle blow-over particles have met with limited success. Recovered titanium ore particles are of value in the chlorination process only if the recovered particles have sufficient size to permit conversion to titanium tetrachloride prior to blowing out of the reactor.
  • the current invention provides methods for preparing chlorinator feedstocks from reactant particles typically considered too small for direct introduction to a fluidized bed reactor or which have otherwise been found unsuitable, for example, due to non-reactivity in the case of recycled coke blow-over.
  • titanium ore includes ilmenites, leucoxenes, natural and synthetic rutiles and Ti02- containing slags.
  • pigmentary titanium dioxide refers to titanium dioxide having particle sizes from 0.1 to 4 ⁇ m with a rutile or anatase crystalline structure.
  • Prior attempts to agglomerate small reactant particles failed due to unsatisfactory binder materials.
  • the methods of the current invention utilize an organic binder material containing carbohydrates, fatty acids or a mixture of carbohydrates and fatty acids.
  • the preferred carbohydrates are sugars, with the most preferred carbohydrate being dried molasses. Any available dried molasses is suitable for use in the current invention, including but not limited to cane molasses, beet molasses, citrus molasses, hemicellulose extract and starch molasses.
  • the most preferred molasses is dried cane molasses.
  • the preferred fatty acids are oils, such as but not limited to linseed oil.
  • the term "organic binder" refers to any organic binder capable of combining with the blow-over fines and forming a final mixture, with or without water, suitable for briquetting.
  • chlorinator feedstocks are prepared by combining an organic binder as described in the preceding paragraph i) with titanium ore, ii) with petroleum coke, iii) with titanium ore and petroleum coke, iv) with titanium ore and pigmentary titanium dioxide, v) with petroleum coke and pigmentary titanium dioxide or vi) with titanium ore, petroleum coke and pigmentary titanium dioxide.
  • the method of the current invention utilizes a briquetting device preferably capable of applying at least 3447 kPa (500 psi) to a mixture to be formed into a solid. More preferably, the briquetting device is capable of compressing the mixture at pressures of 5515 kPa (800 psi) to 6895 kPa (1000 psi).
  • briquettes measuring approximately 1.3 cm x 1.9 cm x 3.8 cm (0.5" x 0.75" x 1.5") were formed by a Komerek 4 briquetter operating at 6894.8 kPa (1000 psi) and 4 rpms.
  • Samples in Tests 14-23 were prepared using a 1.25 cm (0.5 inch) diameter die and a hydraulic press to form test pellets approximately 2.5 cm (1") long.
  • the current invention prepares a chlorinator feedstock by blending titanium ore particles (whether fresh or recovered, blow-over particles or both), coke particles (whether fresh or recovered, blow-over particles or both) or a combination of such ore and coke particles with a binder.
  • the blend may optionally further contain pigmentary titanium dioxide as an additional binding agent.
  • the titanium ore and coke particles especially will include blow-over particles from a fluidized bed reactor or other convenient source. Particle sizes may range from 500 ⁇ m to less than 44 ⁇ m (mesh sizes from -35 U.S. Mesh to -325 U.S. Mesh). Typically, the particles will range in size from 225 ⁇ m to less than 44 ⁇ m.
  • One preferred binder is dried cane molasses such as the product sold under the trade name "Kaptain Kid” by Harvest Brands Inc. of Pittsburg, Kansas.
  • Other preferred binders include raw linseed oil and boiled linseed oil commercially available from several different manufacturers.
  • Linseed oil is a naturally occurring triglyceride vegetable oil obtained from flax seeds by pressing or extraction.
  • the boiled version contains chemical accelerators, called driers, to enhance the drying rate of the oil.
  • Other suitable binders include common table sugar and corn syrup.
  • the components of the mixture prior to briquetting will comprise from 65 to 95.5 percent by weight of titanium ore, of petroleum coke or of a combination of titanium ore and petroleum coke, from 0 to 10 percent by weight of pigmentary titanium dioxide and from 4.5 to 25 percent by weight of organic binder.
  • carbohydrate based binders such as molasses, from 4.5 to 10 percent by weight of binder is preferred.
  • a dry organic binder When using a dry organic binder, water is added to the dry components in an amount sufficient to produce a briquettable final mixture, generally containing from 3.7 percent to 20 percent water by weight of the non-aqueous components of the mixture. Typically the final mixture contains about 15 percent water by weight of the dry components (as shown by the examples below).
  • the binder is a liquid such as boiled linseed oil
  • water is optionally added as necessary to produce the desired briquettable final mixture.
  • a briquettable final mixture will generally be characterized as forming a cohesive mass when the mixture is molded by hand.
  • the final mixture is fed to a briquetter capable of applying sufficient pressure to the mixture to convert the mixture into a substantially solid briquette or other suitable form.
  • the briquetter will apply at least 3447 kPa (500 psi) while fornning the mixture into a solid mass. More preferably, the briquetter will apply between 5515 kPa (800 psi) and 6895 kPa (1000 psi) while forming the feedstock composition.
  • the briquetting process takes place at a temperature ranging from 0°C (32°F) to 60°C (140°F).
  • the briquetting process takes place at room temperature, namely, in the range of from 15.6°C (60°F) to 32.2°C (90°F).
  • Briquettes within the scope of the current invention are those which remain within the fluidized bed chlorinator for a sufficient period of time such that the ore and/or coke fines incorporated therein react to a much greater extent than would have previously been possible; thus, preferably the briquettes will be such that at least 70 percent of the titanium dioxide present will have been converted to titanium tetrachloride under the prevailing chlorination conditions and at least 60 percent of the petroleum coke will have reacted.
  • preferred briquettes for use in a fluidized bed chlorinator will measure 1.3 cm x 1.9 cm x 3.8 cm (0.5" x 0.75" x 1.5") and have a density of 0.20 g/cm 3 to 0.39 g/cm3.
  • the resulting feedstock composition is dried at a temperature ranging from 37.8°C (100°F) to about 260°C (500°F).
  • the feedstock composition is dried at about 104°C (220°F).
  • the final dried feedstock composition preferably will have a moisture content of less than 0.1 percent by weight of water.
  • the crush strength of the resulting briquettes is preferably at least 13.6 kg.
  • the briquettes will have a crush strength of at least 22.7 kg when measured according to ASTM D4179.
  • Feedstock Compositions for Use in a Fluidized Bed Reactor provides feedstocks for use in a fluidized bed chlorinator in a chloride process for making titanium dioxide.
  • the present inventive feedstocks preferably comprise particles of reactant materials (such as titanium ore and petroleum coke) which range in size from 500 ⁇ m to smaller than 44 ⁇ m.
  • a feedstock composition of the current invention comprises from 4.5 to 25 percent by weight of organic binder and the balance, from 75 to 95.5 percent by weight, of titanium ore.
  • the titanium ore may be either blow-over ore recovered from a fluidized bed chlorinator or an unrecovered, fresh ore having particle sizes smaller than about 225 ⁇ m.
  • the organic binder is preferably a material containing primarily carbohydrates, preferably in the form of sugars or fatty acids or mixtures thereof.
  • Preferred organic binders include sugar, corn syrup, dried molasses, raw linseed oil, boiled linseed oil and combinations thereof. Any available dried molasses is appropriate in the current invention, including but not limited to cane molasses, beet molasses, citrus molasses, ,hemicellulose extract and starch molasses. The most preferred molasses is dried cane molasses.
  • One such suitable molasses is sold under the trade name "Kaptain Kid" by Harvest Brands Inc. of Pittsburg, Kansas.
  • the titanium ore in these briquetted feedstock compositions When placed in a fluidized bed chlorinator, preferably the titanium ore in these briquetted feedstock compositions will be retained in the chlorinator for a sufficient time such that at least about 70 percent of the titanium ore will be converted to titanium tetrachloride. More preferably, at least 75 percent of the titanium ore will be converted to titanium tetrachloride.
  • the feedstock composition comprises from 4.5 to 25 percent by weight of organic binder, from 65 to 94.5 percent by weight titanium ore and from 1 to 10 percent by weight pigmentary titanium dioxide.
  • the titanium ore may be either blow-over particles recovered from a fluidized bed chlorinator or fresh, unrecovered ore particles smaller than about 100 ⁇ m.
  • the pigmentary titanium dioxide is an additional binder which combines with the organic binder to enhance the crush strength of the feedstock composition, when briquetted as described herein.
  • the feedstock composition comprises from 4.5 to 25 percent by weight of organic binder and the balance, from 75 to 95.5 percent by weight, of petroleum coke particles, which particles will typically be smaller than about 100 ⁇ m.
  • the feedstock composition comprises from about 4.5 to about 25 percent by weight of organic binder, from about 65 to about 94.5 percent by weight of petroleum coke and from about 1 to about 10 percent by weight of pigmentary titanium dioxide.
  • the pigmentary titanium dioxide is an additional binder which combines with the organic binder to enhance the crush strength of the feedstock composition, when briquetted as taught above.
  • the feedstock composition comprises from 4.5 to 25 percent by weight of organic binder and the balance, from 75 to 95.5 percent by weight, of a combination of petroleum coke particles and unreacted titanium dioxide particles.
  • the petroleum coke is from 30 to 70 percent by weight in the combination with the titanium dioxide particles, and the unreacted titanium dioxide particles are correspondingly present at from 70 to 30 percent by weight.
  • the feedstock composition comprises from 4.5 to 25 percent by weight of organic binder, from 1 to 10 percent by weight of pigmentary titanium dioxide as an additional binder, and the balance, from 65 to 94.5 percent by weight of a combination of petroleum coke and titanium ore particles.
  • the coke and ore particles include especially those which heretofore have been considered too small to be of practical use in a fluidized bed chlorinator, typically being 100 ⁇ m and smaller. Most especially, the use of recovered blow-over coke and ore fines is contemplated.
  • Tests 5-23 demonstrate the formation of briquettes suitable for use in a fluidized bed chlorinator. These tests demonstrate the ability to preparing briquettes having the necessary crush strength for use in a fluidized bed reactor. Preferred briquettes for use in a fluidized bed chlorinator will have a crush strength of 13.6 kg (30 lbs.) or greater when measured according to ASTM D4179. More preferably, the briquettes will have crush strengths greater than 36.3 kg (80 lbs.). In contrast to Tests 5-23, Tests 1-4 report the results of samples considered too soft for use in a fluidized bed chlorinator. Tests 15 and 21 and Tests 16 and 18 are noted to report crush strengths for samples having identical compositions. Although the samples have identical compositions, the test results for each pair differ. In this instance the differences are believed to result from differences in homogeneity in the tested samples.
  • the composition of the current invention preferably remains crush resistant during the reaction process.
  • the crush strength of a briquette during the chlorination process was determined by preparing ten samples having the same composition, using ore and coke particles in combination in a 60:40 ratio by weight, 2.5 percent by weight of molasses and 5 percent by weight of pigmentary titanium dioxide as an additional binder. These samples were then chlorinated for 15 minutes at 900°C. The samples were removed from the reactor and tested for crush strength in accordance with the procedures of ASTM D4179. The results of the crush tests are reported in Table 1 below. The drop in crush strength following chlorination is consistent with the reaction rate of the briquette components.
  • feedstock compositions of the current invention will have a crush strength of at least 610 grams following exposure to reaction conditions of 900°C in the presence of chlorine. More preferably, the feedstock compositions will have a crush strength of at least 1.9 kilograms following exposure to reaction conditions of 900°C in the presence of chlorine.
  • the current invention also provides methods for recovering and reacting blow-over fines lost from a fluidized bed chlorinator.
  • the current invention recovers blow-over fines lost from fluidized bed chlorinators used in the chloride process.
  • reactants readily blow out of the fluidized bed reactor prior to reacting when, due to attrition and the reaction process, reactant size reaches 100 ⁇ m and smaller.
  • a typical fluidized bed chlorinator operates at about 85-95 percent efficiency with about 5-15 percent of the reactants lost as blow-over particles.
  • attempts to recover and recycle blow-over particles have been less than successful due to problems with binders and non-reactivity of blowover coke particles.
  • titanium ore particles smaller than about 44 ⁇ m will not normally chlorinate; therefore, blow-over particles smaller than 44 ⁇ m are generally considered waste products.
  • the method of the current invention recovers titanium ore and coke blow-over particles from the gases exiting the fluidized bed reactor by traditional methods such as a baghouse or cyclone. If desired, the particles may be separated by size or type. For example, the titanium ore has greater value to the operator. Therefore, the operator may wish to recycle only the recovered titanium ore. Separation systems suitable for isolating particles on the basis of weight and size are well known to those skilled in the art. In the preferred embodiment, the titanium ore and petroleum coke particles are recovered separately.
  • blow-over fines from a fluidized bed chlorinator are recovered from the gases leaving the reactor.
  • the blow-over fines are combined with an organic binder and optionally with pigmentary titanium dioxide.
  • the pigmentary titanium dioxide is a supplemental binder and strengthening agent.
  • the organic binder comprises carbohydrates, preferably in the form of sugar, or fatty acids or combinations thereof.
  • Preferred organic binders include sugar, corn syrup, dried molasses, raw linseed oil, boiled linseed oil and combinations thereof.
  • the preferred dried molasses is dried cane molasses.
  • the final blending step to produce the final mixture prior to briquetting is again deteimined by the physical nature of the organic binder.
  • a sufficient amount of water is added following dry blending to produce a briquettable final mixture.
  • the final mixture generally contains from about 3.7 percent to about 20 percent by weight water.
  • water is optionally added when necessary to produce a final mixture having the desired consistency as described above.
  • a liquid binder to the dry components may complete the formulation process, yielding the final mixture for briquetting.
  • the final mixture is fed to a briquetter capable of applying sufficient pressure tothe mixture to convert the final mixture into a substantially solid briquette.
  • the briquetter will apply at least 3447.4 kPa (500 pounds per square inch) while forming the final mixture into a solid mass. More preferably, the briquetter will apply at least 5515 kPa (800 psi) while forming the feedstock composition.
  • the briquetting process takes place at a temperature ranging from 0°C (32°F) to 60°C (140°F).
  • the briquetting process takes place at room temperature, that is, from generally 15.6°C (60°F) to 32.2°C (90°F).
  • the resulting feedstock composition is dried at a temperature ranging from about 37.8°C (100°F) to about 260°C (500°F).
  • the feedstock composition is dried at about 104.4°C (220°F).
  • the dried feedstock composition has less than 0.1% by weight water.
  • the feedstock composition has a crash strength of at least 13.6 kg (30 pounds) when measured according to ASTM D 4179. The dried feedstock composition is then ready for use in the fluidized bed chlorinator.
  • the feedstock composition may be the primary feedstock or it may be combined with raw material normally used in the chlorinator. No special techniques are required to feed the feedstock of the cu ⁇ ent invention into the chlorinator. Once in the chlorinator, the feedstock composition reacts with the chlorine gas. Reaction efficiencies of feedstock compositions prepared and used according to the cu ⁇ ent invention are reported below in Tables 2 and 3. As reported in Table 2, greater than 70 percent of the total Ti02 within the briquettes reacts when placed in a fluidized bed reactor for 15 minutes. Total Ti02 refers to the sum of the titanium dioxide present in the titanium ore and the pigmentary titanium dioxide used as a crush strength enhancer.
  • the recovered, blow-over petroleum coke fines contained within the briquettes reacts at a significantly better rate than even traditional, unrecovered petroleum coke prepared and used in accordance with the prior art. Specifically, greater than 60 percent by weight of the petroleum coke included in the briquettes reacted within in the fluidized bed reactor. For the briquettes, the coke reaction rate ranged from 4.08 g/minute to 6.20 g/minute. hi contrast, the second half of Table 3 indicates prior art reaction rates for petroleum coke of no greater than 35.64 percent by weight and only 0.25 g/minute. Note, the prior art petroleum coke was not blow-over coke fines. Clearly, the method of the cu ⁇ ent invention improves operating economics by recycling blow-over fines, improving the reaction rate of the raw materials and reducing subsequent blow-over of reactants. Table 2

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Abstract

L'invention concerne de nouvelles compositions de matières premières d'alimentation, destinées à être utilisées dans un chlorateur à lit fluidisé d'un processus utilisant des chlorures pour fabriquer des pigments à base de dioxyde de titane ainsi que des procédés pour préparer la composition de matières premières d'alimentation, lesdites compositions permettant l'utilisation de réactifs qui, avant, étaient inadaptés pour être utilisés dans ces chlorateurs, notamment par procédé de soufflage de fines de minerai de titane et de coke de pétrole.
PCT/US2005/017455 2004-05-24 2005-05-17 Composition de matiere premiere d'alimentation destinee a un chlorateur a lit fluidise et procedes de fabrication correspondants Ceased WO2005116278A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015107408A1 (fr) * 2014-01-14 2015-07-23 Holcim Technology Ltd Procédé d'amélioration du rendement de broyage à sec de coke de pétrole

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB535179A (en) * 1939-06-30 1941-04-01 Pittsburgh Plate Glass Co Chlorination of titanium bearing materials
GB553056A (en) * 1941-03-07 1943-05-06 Pittsburgh Plate Glass Co Chlorination of titanium bearing materials
GB744415A (en) * 1952-04-17 1956-02-08 Nat Lead Co Improvements in or relating to a process for chlorinating titaniferous materials
US4015977A (en) * 1971-08-16 1977-04-05 Crawford Chester C Petroleum coke composition
US4187117A (en) * 1976-04-12 1980-02-05 Quebec Iron And Titanium Corporation - Fer Et Titane Du Quebec, Inc. Titanium slag-coke granules suitable for fluid bed chlorination
US6149712A (en) * 1988-07-26 2000-11-21 Commonwealth Scientific & Industrial Research Organisation Sintered high titanium agglomerates
US6454831B1 (en) * 1998-07-06 2002-09-24 Metallgesellschaft Ag Use of a fine-grained product produced during the production of titanium dioxide

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB535179A (en) * 1939-06-30 1941-04-01 Pittsburgh Plate Glass Co Chlorination of titanium bearing materials
GB553056A (en) * 1941-03-07 1943-05-06 Pittsburgh Plate Glass Co Chlorination of titanium bearing materials
GB744415A (en) * 1952-04-17 1956-02-08 Nat Lead Co Improvements in or relating to a process for chlorinating titaniferous materials
US4015977A (en) * 1971-08-16 1977-04-05 Crawford Chester C Petroleum coke composition
US4187117A (en) * 1976-04-12 1980-02-05 Quebec Iron And Titanium Corporation - Fer Et Titane Du Quebec, Inc. Titanium slag-coke granules suitable for fluid bed chlorination
US6149712A (en) * 1988-07-26 2000-11-21 Commonwealth Scientific & Industrial Research Organisation Sintered high titanium agglomerates
US6454831B1 (en) * 1998-07-06 2002-09-24 Metallgesellschaft Ag Use of a fine-grained product produced during the production of titanium dioxide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015107408A1 (fr) * 2014-01-14 2015-07-23 Holcim Technology Ltd Procédé d'amélioration du rendement de broyage à sec de coke de pétrole
CN106029849A (zh) * 2014-01-14 2016-10-12 霍尔辛姆科技有限公司 提高石油焦的干磨效率的方法
US9896635B2 (en) 2014-01-14 2018-02-20 Holcim Technology, Ltd. Method of enhancing the dry grinding efficiency of petcoke
RU2675816C2 (ru) * 2014-01-14 2018-12-25 Холсим Технологи Лтд Способ повышения эффективности сухого помола нефтяного кокса

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