| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 06/22/2000 | WO2000036167A1 Composition of oxime and hydroxy-ester for the solvent extraction of metals |
| 06/21/2000 | EP0915994B1 "waelz" method for processing of zinc containing materials in pelletized form |
| 06/02/2000 | WO2000031308A1 Thlaspi caerulescens subspecies for cadmium and zinc recovery |
| 06/02/2000 | CA2352179A1 Thlaspi caerulescens subspecies for cadmium and zinc recovery |
| 05/18/2000 | DE19844546C1 Production of zinc sulfide, useful in hydrometallurgical recovery of zinc, involves filtering and washing precipitate obtained from residual impure zinc sulfate electrolyte and impure sodium sulfide solution from barium sulfate production |
| 05/10/2000 | CN1052265C Chloride assisted hydrometallurgical extraction of copper |
| 05/04/2000 | DE19849385A1 Verfahren zur Verwertung unsortierter Altbatterien sowie Vorrichtung zur Durchführung dieses Verfahrens Process for the recovery of unsorted waste batteries and device for carrying out said method |
| 05/03/2000 | EP0997963A1 Process for the utilization of unsorted batteries as well as apparatus for carrying out the method |
| 05/03/2000 | CN2376475Y Furnace for obtaining white zinc |
| 05/02/2000 | CA2138777C Production of metals from minerals |
| 04/25/2000 | US6054105 Process for the solvent extraction of nickel and cobalt values in the presence of magnesium ions from a solution |
| 04/13/2000 | WO2000020651A1 Device and method for removing dross from a vessel of molten zinc with enhanced zinc yield |
| 04/13/2000 | CA2346425A1 Device and method for removing dross from a vessel of molten zinc with enhanced zinc yield |
| 03/30/2000 | WO2000017404A1 Method for producing directly reduced metal in a multi-tiered furnace |
| 03/30/2000 | CA2343212A1 Method for producing directly reduced metal in a multi-tiered furnace |
| 03/29/2000 | CN2371195Y 锌白炉 Zinc white stove |
| 03/28/2000 | US6042776 Reaction furance for holding molten iron, agitator for molten iron, recovery means comprising two dust collectors, the first collects flue dust of larger particle size from the furnace and the second for collecting smaller particle size |
| 03/15/2000 | CN1247234A Zinc oxide as gray feed and its preparing process |
| 03/01/2000 | CN2366422Y Muffle furnace for obtg. crude zinc with chain type fire grate |
| 02/24/2000 | WO2000009771A1 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 02/24/2000 | WO2000009770A1 Process and apparatus for recovering metal material from waste material |
| 02/24/2000 | CA2339851A1 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 02/23/2000 | EP0843741B1 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 02/08/2000 | US6022406 Processing foundry dust, and in particular dust from electrical steelworks, preparing zinc ferrite |
| 02/03/2000 | WO2000005424A1 Method for producing zinc using the is process in an is shaft furnace and corresponding is shaft furnace |
| 02/02/2000 | EP0976843A1 Treatment of steel plant waste metal oxides by firing the same in the form of coke containing briquettes |
| 02/02/2000 | EP0975816A1 Method for recycling brass foundry waste |
| 02/02/2000 | CN1243167A Method for extracting zinc from zinc-contained waste residue and apparatus thereof |
| 01/27/2000 | DE19841980A1 Imperial smelting shaft furnace installation for zinc production is operated by blowing a finely granulated powder mixture of a carbon carrier and a powder containing zinc into a bottom region of the furnace |
| 01/26/2000 | EP0973953A1 Process and device for precipitating compounds from zinc metal baths by means of a hollow rotary body that can be driven about an axis and is dipped into the molten zinc |
| 01/19/2000 | EP0972849A1 Method and apparatus for treating ironmaking dust |
| 01/12/2000 | EP0813500B1 Purification of metal containing solutions |
| 01/05/2000 | EP0832306B1 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 12/23/1999 | WO1999066085A1 Treatment of roasted metal sulphide ores and ferrites by leaching with peroxysulphuric acid |
| 12/22/1999 | EP0965651A2 Pyrometallurgical processing of metal and organics containing waste in a smelt chamber |
| 12/22/1999 | CN2354970Y Apparatus for recovering zinc from dregs |
| 12/22/1999 | CN1239147A Ruducor for pyrometallurgy of zinc |
| 12/15/1999 | CA2274188A1 Process for pyrometallurgical processing, in a furnace chamber, of metal-containing waste |
| 12/12/1999 | CA2240450A1 Process for the treatment of roasted metal sulphide ores and ferrites |
| 12/09/1999 | WO1999063121A1 Melt and melt coating sulphation process |
| 12/09/1999 | CA2333967A1 Melt and melt coating sulphation process |
| 12/07/1999 | US5997607 Process of condensing metal in condensation chamber |
| 12/01/1999 | EP0773301B1 Hydrometallurgical treatment for the purification of waelz oxides through lixiviation with sodium carbonate |
| 11/30/1999 | US5993635 Processing a sulphide mineral composition which at least partly comprises an iron-containing mineral. |
| 11/30/1999 | US5993512 The molten salts dissolve into the water. the metal oxides, and any metal entrapped in the molten mixture, instantly fragment into small particles. brine can be separated from the small particles. |
| 11/25/1999 | WO1999060177A1 Method for continuous separation of impurities and alloyings from liquid metal baths and device for implementing said method |
| 11/09/1999 | US5980725 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 11/03/1999 | CN1233860A Method for producing zinc powder used for prodn. of low mercury or mercury-free alkaline cell |
| 10/27/1999 | EP0951573A1 Method for extracting non-ferrous metals such as zinc by electrolysis and by adding substances containing phosphor |
| 10/21/1999 | WO1999053108A1 Method for treating steel works dust by wet process |
| 10/21/1999 | DE19816708A1 Method for reconditioning of inorganic acids contaminated with metals |
| 10/20/1999 | CN2344402Y Laying-off equipment for rotary kiln |
| 10/19/1999 | US5968229 Purification of metal containing solutions |
| 10/13/1999 | CN1045625C Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 10/06/1999 | EP0946767A1 Recovery of iron products from waste material streams |
| 10/06/1999 | EP0946766A1 Method for leaching zinc concentrate in atmospheric conditions |
| 10/06/1999 | EP0946765A1 Hydrometallurgical zinc recovery process and apparatus |
| 09/25/1999 | CA2261173A1 Treatment of steel mill waste metal oxides |
| 09/15/1999 | EP0646185B1 Production of metals from minerals |
| 09/14/1999 | US5951954 Method for manufacturing clear brine fluids from impure zinc feedstock |
| 09/01/1999 | EP0939138A1 Process and apparatus for treating zinc containing waste by alkaline leaching |
| 08/24/1999 | US5942198 Mixing flue dust with coal fines forming briquettes and adding to final furnace batch to form zinc containing dust; dissolving zinc containing dust forming intermediate solution; filtering, precipitating and filtering zinc oxide |
| 08/19/1999 | WO1999041418A1 Process and device for precipitating compounds from zinc metal baths by means of a hollow rotary body that can be driven about an axis and is dipped into the molten zinc |
| 08/18/1999 | CN2333713Y Closed zinc pyro-refining furnace |
| 08/17/1999 | CA2151791C Direct smelting of zinc concentrates and residues |
| 07/28/1999 | CN1224067A Vacuum distillation of hard zinc to extract zinc and to concentrate germanium, indium and silver |
| 07/21/1999 | EP0930373A1 Recovery of nickel and/or cobalt from a hydroxide concentrate with an ammonium leach solution |
| 07/21/1999 | EP0930372A1 Use of alkxoylated alcoholes or amines as modifiers in the seperation of metalions from aqueous solutions by solvent-extraction |
| 06/24/1999 | WO1999031285A1 Oxidising elutriation of contaminated sludge containing iron with separation of zinc and lead |
| 06/24/1999 | WO1999031014A1 Method for manufacturing clear brine fluids from impure zinc feedstock |
| 06/24/1999 | CA2315400A1 Method for manufacturing clear brine fluids from impure zinc feedstock |
| 06/24/1999 | CA2312037A1 Oxidising elutriation of contaminated sludge containing iron with separation of zinc and lead |
| 06/23/1999 | EP0924307A1 Solvent extraction of cobalt and nickel values from a magnesium containing solution |
| 06/23/1999 | EP0924304A1 Method of producing reduced iron pellets |
| 06/23/1999 | CN2325402Y Zinc slag metallurgic recovery furnace |
| 06/10/1999 | DE19754209A1 Steelworks dust is treated by partially reduction, selective zinc leaching and lead compound flotation |
| 06/09/1999 | EP0853648B1 Method for preparing inorganic pigments, resulting inorganic pigments, and apparatus therefor |
| 06/09/1999 | CN1219208A Fluidized bed treatment of EAF dust |
| 05/25/1999 | US5906671 Method for extraction of metals and non-metals from minerals, industrial by-products and waste materials |
| 05/25/1999 | CA2151195C Method of making pig iron with zinc recovery |
| 05/19/1999 | EP0915994A1 "waelz" method for processing of zinc containing materials in pelletized form |
| 05/19/1999 | EP0915993A1 Fluidized bed treatment of eaf dust |
| 05/19/1999 | EP0766749B1 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 05/18/1999 | US5904748 Production of elementary volatile metals by thermal reduction of their oxides with the aid of another metal |
| 05/06/1999 | WO1999022037A1 Method for extracting non-ferrous metals such as zinc by electrolysis and by adding substances containing phosphor |
| 05/06/1999 | WO1999022035A1 Condensation chamber and method of condensing metal |
| 05/05/1999 | CN1043248C Hydrometallurgical recovery of metals from complex ores |
| 04/29/1999 | DE19747328A1 Non-ferrous metal, especially zinc, electrowinning process |
| 04/28/1999 | EP0910678A1 Process for reusing dusts from metallurgical processes, such as steel converter dusts containing zinc |
| 04/21/1999 | EP0909336A1 Process for recovery of zinc from sphalerite containing ores or concentrates |
| 04/21/1999 | CN1214740A Method and apparatus for treating ironmaking dust |
| 04/20/1999 | CA2052849C Alkaline leaching of galvanized steel scrap |
| 04/08/1999 | WO1999016917A1 Pyrometallurgical method and device for separating zinc and/or cadmium from lead in metallurgical residues |
| 04/06/1999 | US5891216 Oven, mercury trap and condenser |
| 03/31/1999 | EP0904419A1 Fluidized bed roasting process |
| 03/31/1999 | CN1212732A Process for recovery of zinc from sphalerite containing ores or concentrates |
| 03/24/1999 | EP0804624B1 Chloride assisted hydrometallurgical copper extraction |
| 03/04/1999 | WO1999010546A1 Process for the extraction of metals from ammoniacal solution |
| 03/04/1999 | DE19737220A1 Metallurgical furnace for production of nonferrous metals from a melt by ausmelt technology |
| 03/04/1999 | CA2302353A1 Process for the extraction of metals from ammoniacal solution |