| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 10/04/2001 | EP0946766B1 Method for leaching zinc concentrate in atmospheric conditions |
| 09/25/2001 | US6293993 Forming mixture of waste with finely divided solid reducing agent and binder; compacting as agglomerates; adding to reactor containing bath of liquid copper or brass metal in which zinc and copper oxides are reduced; casting new brass |
| 09/20/2001 | WO2001068926A1 Method for regulating a roasting furnace |
| 09/13/2001 | WO2001066810A1 Method of sintering and sinter bed composition |
| 09/05/2001 | EP1129227A1 Device and method for removing dross from a vessel of molten zinc with enhanced zinc yield |
| 09/05/2001 | EP1129225A1 Sulfatisation process for metal extraction from sulfide ores |
| 08/30/2001 | WO2001062993A1 Process and apparatus for recovery of cyanide and metals |
| 08/30/2001 | WO2001062991A1 Method for upgrading steel plant dust |
| 08/30/2001 | CA2400806A1 Process and apparatus for recovery of cyanide and metals |
| 08/29/2001 | CN1310768A Method for producing zinc using IS shaft furnace and corresponding IS shaft furnace |
| 08/22/2001 | EP1126039A1 Method and apparatus for reductively processing the liquid slag and the baghouse dust of the electric arc furnace |
| 08/14/2001 | US6274104 Non-ferrous metal recovery method utilizing a melt sulphation reaction |
| 08/09/2001 | WO2001056684A1 A method for treatment of flue gas cleaning products |
| 08/08/2001 | EP1122324A1 Method of leaching zinc concentrate with spent electrolyte and added iron(III) residue |
| 08/02/2001 | WO2001055460A1 Method for reprocessing dust or dust mixtures |
| 08/02/2001 | CA2398349A1 Method for reprocessing dust or dust mixtures |
| 08/01/2001 | EP1119646A1 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 08/01/2001 | EP1119645A1 Process and apparatus for recovering metal material from waste material |
| 07/24/2001 | US6264903 Leaching; zinc displacement |
| 07/18/2001 | EP1115890A1 Method for producing directly reduced metal in a multi-tiered furnace |
| 07/18/2001 | EP0975816B1 Method for recycling brass foundry waste |
| 07/11/2001 | EP1114873A1 Biological method of dezincifying galvanised scrap metal |
| 07/05/2001 | WO2001048255A1 Method to control manganese in zinc leach circuits |
| 06/28/2001 | US20010005496 Adding a first fraction of a zinc oxide (ZnO)/ammonium chloride (NH4Cl) solution to given amount of water to form an intermediate solution and ZnO precipitate, and the second fraction to the intermediate solution; from industrial waste |
| 06/27/2001 | CN1300862A Process for smelting zinc |
| 06/26/2001 | CA2192084C Hydrometallurgical treatment for the purification of waelz oxides through lixiviation with sodium carbonate |
| 06/21/2001 | WO2001044520A1 Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials |
| 06/13/2001 | EP1105544A1 Method for producing zinc using the is process in an is shaft furnace and corresponding is shaft furnace |
| 06/05/2001 | US6241797 Process for reducing oxidic slags |
| 06/05/2001 | CA2140262C Treatment of polyvinylchloride |
| 05/25/2001 | WO2001036693A2 Recovery of metals from ore by bioleaching with sulfur addition |
| 05/23/2001 | CN1066203C Process for recovery of zinc from sphalerite containing ores or concentrates |
| 05/22/2001 | US6235234 Device and method for enhancing zinc yield from dross |
| 05/16/2001 | EP1098999A1 Melt and melt coating sulphation process |
| 05/16/2001 | CN1065919C Vacuum distillation of hard zinc to extract zinc and to concentrate germanium, indium and silver |
| 05/03/2001 | US20010000597 Recovery of zinc from geothermal brines |
| 04/25/2001 | EP1094122A1 Process for melting of heavy metal bearing residues |
| 04/25/2001 | EP0832303B1 Chloride assisted hydrometallurgical extraction of metal |
| 04/25/2001 | CN1292428A Process for controlling waste gas produced by traditional pyro-smelting zinc and its equipment |
| 04/24/2001 | US6221124 Fluidized bed treatment of EAF dust |
| 04/12/2001 | WO2001025497A1 Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 04/12/2001 | DE19947343A1 Melting zinc-containing materials containing heavy metals comprises reductively moving the burner and/or the liquid slag so the zinc is converted into the gas phase |
| 04/05/2001 | WO2001023627A1 Process to selectively recover metals from waste dusts, sludges and ores |
| 04/05/2001 | DE19946430A1 Verfahren zur Verwertung von Eisen, Zink und Blei enthaltenden Sekundärrohstoffen Process for the recovery of iron, zinc and lead-containing secondary raw materials |
| 04/04/2001 | EP1088904A1 Method of treating iron, zinc and lead bearing secondary materials such as steelmaking furnace dusts |
| 03/28/2001 | EP1086256A1 Treatment of roasted metal sulphide ores and ferrites by leaching with peroxysulphuric acid |
| 03/28/2001 | EP1086255A1 Method for continuous separation of impurities and alloyings from liquid metal baths and device for implementing said method |
| 03/28/2001 | CN1288966A Copper-zinc separation method during smelting in a blast furnace |
| 03/28/2001 | CA2321311A1 Method of utilizing secondary raw materials containing iron, zinc and lead |
| 03/14/2001 | CN2423288Y Zinc-smelting electric furnace |
| 03/08/2001 | WO2001016384A1 Sulfatisation process for metal extraction from sulfide ores |
| 02/22/2001 | WO2001012866A1 Pyrometallurgy of zinc and closed furnace for zinc smelting |
| 02/21/2001 | CN1284571A Process and apparatus of direct producing high-grade zinc oxide |
| 02/15/2001 | DE19932334C1 Smelting residual materials in a vertical furnace comprises operating the furnace with a hot wind and a combined oxygen injection/enrichment of the wind, and adjusting the heat profile in the furnace |
| 02/14/2001 | CN1061959C Graphite, silicon carbide rotator and making method |
| 02/13/2001 | CA2160488C Recovery of metals from sulphidic material |
| 02/08/2001 | WO2000050649A3 Method and apparatus for removing undesirable metals from iron-containing materials |
| 01/24/2001 | EP1070150A1 Method for treating steel works dust by wet process |
| 01/09/2001 | US6171544 Multiple coherent jet lance |
| 01/04/2001 | WO2001000355A1 Zinc-based metal foamed bodies |
| 12/27/2000 | CN2412018Y Enclosed zinc-smelting furnace |
| 12/26/2000 | US6165427 Method for removal of heavy metals from aqueous solutions using sodium di-(n-octyl)phosphinate or sodium di-(n-dodecyl) phosphinate |
| 12/19/2000 | US6162346 Process for recovery of zinc from sphalerite containing ores or concentrates |
| 12/19/2000 | CA2132548C Process and plant for removing lead and zinc from metallurgical-works dust |
| 12/13/2000 | EP1059361A1 A method of purifying an iron-containing acid leaching solution |
| 12/12/2000 | US6159268 Process for pyrometallurgical processing in a furnace chamber, of metal-containing waste |
| 12/05/2000 | US6155965 Smelting fly ash to a leaching resistant slag by oxidizing with added a carbon or hydrocarbonaceous substance which supplies additional energy, also reducing zinc and lead contend |
| 11/28/2000 | US6152983 Method of producing reduced iron pellets formed by reducing iron oxide pellets containing dusts (including sludges) containing zn ingredients formed in iron works |
| 11/28/2000 | CA2040316C Process for recovering valuable metals from a dust containing zinc |
| 11/22/2000 | CN1274014A Zinc-smelting electric furnace and its technology |
| 11/07/2000 | CA2186826C Method of treating zinc-containing substance and apparatus therefor |
| 10/19/2000 | WO2000061826A1 Purification of zinc-bearing material solutions containing manganese |
| 10/17/2000 | US6132488 Process of treating waste containing zinc oxide |
| 10/11/2000 | EP1042518A1 Oxidising elutriation of contaminated sludge containing iron with separation of zinc and lead |
| 10/11/2000 | EP1042227A1 Method for manufacturing clear brine fluids from impure zinc feedstock |
| 10/11/2000 | CN1269425A Multi-condensed jet-flow spray gun |
| 10/11/2000 | CN1057344C Chloride assited hydrometallurgical extraction of metal |
| 10/09/2000 | CA2268496A1 Purification of zinc materials |
| 10/04/2000 | EP1041341A1 Multiple coherent jet lance |
| 10/04/2000 | CN1057131C Fluidized bed for treating dsut from arc furnace |
| 09/27/2000 | CN1056886C Method of processing finely divided material incorporating metal based constituents |
| 09/19/2000 | US6120577 Separating and recovering iron, zinc and lead from steel plant waste oxides, comprising mixing waste oxides and sludge which contains iron zinc and lead, adding coke particles, briquetting the mixture, firing to reduce iron oxide to iron |
| 09/06/2000 | EP0832302B1 Chloride assisted hydrometallurgical extraction of nickel and cobalt |
| 09/06/2000 | CN1265428A Zinc oxide producing method from slag of zinc white furnace |
| 08/31/2000 | WO2000050652A1 Treatment of metal sulphide concentrates by roasting and arc furnace smelt reduction |
| 08/31/2000 | WO2000050649A2 Method and apparatus for removing undesirable metals from iron-containing materials |
| 08/30/2000 | EP1031634A1 Separation refining of metal melts by addition of metal hydrides, especially MgH2 |
| 08/30/2000 | EP0815270B1 Atmospheric mineral leaching process |
| 08/30/2000 | CN1055971C Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulfide minerals |
| 08/24/2000 | CA2298874A1 Process for separating molten metals |
| 08/23/2000 | CN2392786Y Graphite condenser for smelting non-ferrous zinc |
| 08/15/2000 | US6102982 Method for recovering zinc oxide from dust |
| 08/09/2000 | EP1025269A1 Process for the extraction of metals from ammoniacal solution |
| 07/26/2000 | CN1054888C Method for recovering metal and chemical values |
| 07/19/2000 | EP1020537A1 Separation and concentration method for recovering gallium and indium from solutions by jarosite precipitation |
| 07/19/2000 | EP1019554A1 Pyrometallurgical method and device for separating zinc and/or cadmium from lead in metallurgical residues |
| 07/19/2000 | EP0909336B1 Process for recovery of zinc from sphalerite containing ores or concentrates |
| 07/19/2000 | CN1260256A One-step manufacture method for industrial high-purity zinc powder |
| 07/04/2000 | US6083295 Method of processing finely divided material incorporating metal based constituents |
| 07/04/2000 | US6083294 Method of treating dust exhausted from melting furnace |