| Patents for C22B 7 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof (11,341) |
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| 10/26/1999 | US5972074 Decarbonizing misch metal or alloy by mixing with titanium, zirconium or oxides and melting in inert atmosphere to form carbides of titanium or zirconium |
| 10/26/1999 | US5972073 Adding alkaline earth salt to high ph waste water to form group alkaline earth-group v oxyanion salt precipitate and water soluble group iii hydroxide, filtering precipitate, then lowering ph to precipitate out group iii hydroxide |
| 10/21/1999 | WO1999053108A1 Method for treating steel works dust by wet process |
| 10/21/1999 | WO1999043615A8 Recovery of products from non-metallic products derived from aluminum dross |
| 10/21/1999 | WO1999041417A3 Method for producing high-purity molybdenum chemicals from molybdenum sulfides |
| 10/20/1999 | EP0950429A1 Method for separating objective component |
| 10/20/1999 | EP0871787B1 Electrochemical processing method for catalyst substrates containing noble metals for the recovery thereof |
| 10/20/1999 | CN1045796C Method for extraction of gold, silver and other noble metals from arsenic- and copper-bearing anode mud |
| 10/20/1999 | CN1045795C Method for recovering platinum and lead in anode mud from electrolytic hydrogen peroxide solution production |
| 10/20/1999 | CN1045794C Method for obtaining gold, silver and other noble metals from anode mud contg. high concn. arsenic and lead |
| 10/20/1999 | CN1045729C Method of recovering metal material from gas generator for air bag in condemned automobile |
| 10/19/1999 | US5968258 Crushing slag with calcium sulfate source; heating, grinding |
| 10/19/1999 | US5968230 Method and furnace for disposal of steel-making waste, and operating method of the furnace |
| 10/13/1999 | EP0948656A1 Method for downgrading high-melting materials by using a melting tank and an electro-reduction tank |
| 10/13/1999 | EP0948654A1 Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method |
| 10/13/1999 | EP0862780B1 Method of utilizing contaminated metal parts |
| 10/13/1999 | CN1045627C Method and apparatus for recovering aluminium foil from waste aluminium foil package |
| 10/13/1999 | CN1045624C Method for leaching nickel-copper matte |
| 10/12/1999 | CA2130798C Recovery of non-ferrous metals from dross |
| 10/07/1999 | WO1999050600A1 Ash melting furnace and ash melting method thereof |
| 10/07/1999 | WO1999050466A1 Metal scrap submergence system for scrap charging/melting well of furnace |
| 10/07/1999 | WO1999050010A1 Metal powders obtained from residue of material removal processes on iron parts produced by chill casting |
| 10/06/1999 | EP0946769A1 Dross press with rocking press head |
| 10/06/1999 | EP0946767A1 Recovery of iron products from waste material streams |
| 10/06/1999 | EP0946765A1 Hydrometallurgical zinc recovery process and apparatus |
| 10/06/1999 | EP0946300A1 Production of aromatic carboxylic acids and recovery of co/mn cattalyst from ash |
| 10/05/1999 | US5961938 Adding a diluted nitric acid solution to a slurry of the rare earth-iron alloy containing cobalt, while maintaining ph of a resulting mixture at 5 or higher; filtering an undissolved residue containing iron from a rare earth-containing nitrate |
| 10/05/1999 | US5961691 Extracting and recovering lead in good purity by-products from smelter flue dusts containing lead sulfate. the process also allows the substantially complete recovery or recycling of precious metals otherwise lost in flue dusts wastes. |
| 10/05/1999 | US5961055 Method for upgrading iron ore utilizing multiple magnetic separators |
| 09/29/1999 | CN1045315C Method and appts. for used aluminum can recycling |
| 09/28/1999 | US5957397 Method for handling mercury containing lamps |
| 09/28/1999 | CA2143403C Process for the simultaneous smelting of dust and incinerator slag |
| 09/25/1999 | CA2261173A1 Treatment of steel mill waste metal oxides |
| 09/23/1999 | WO1999047715A1 Method for transforming slag derived from non-iron metallurgy |
| 09/23/1999 | DE19811763A1 Removing arsenic and optionally antimony from suspensions obtained in drinking water production |
| 09/16/1999 | DE19810874A1 Verfahren zur Aufbereitung von Edel- und/oder Halbedelmetallen aus Leiterplatten Process for the preparation of precious and / or semi-precious metals from printed circuit boards |
| 09/15/1999 | EP0942070A1 Recovery of metal values from polyester circuit boards by treatment in alkaline solutions of higher alcohols |
| 09/15/1999 | EP0833961B1 Ammoniacal metal solution recycling process |
| 09/10/1999 | WO1999045160A1 Method for electrochemical oxidation of vanadium in aqueous solutions and method to obtain vanadium pentoxide |
| 09/07/1999 | US5948312 Skimmer system |
| 09/02/1999 | WO1999043615A1 Recovery of products from non-metallic products derived from aluminum dross |
| 09/02/1999 | WO1999028414A3 Method for cooling an exothermally fully reacting waste mixture |
| 09/01/1999 | EP0939138A1 Process and apparatus for treating zinc containing waste by alkaline leaching |
| 09/01/1999 | EP0938591A1 Steel slag and ferriferous material reprocessing process useful to produce pig iron and environmentally compatible slags |
| 08/31/1999 | US5945342 Mixing diphosphonic acid-substituted resin having adsorbed actinide, rare earth, or heavy metal elements with low boiling point oxidizing acid; irradiating mixture to dissolve portion of resin releasing elements; for accurate analysis |
| 08/31/1999 | US5944870 Method of manufacturing pig iron or steel and cement clinker from slags |
| 08/31/1999 | US5943970 Method and equipment for thermal destruction of wastes |
| 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 |
| 08/24/1999 | US5942023 Forming a plasma arc in a sealed atmosphere plasma arc furnace; introducing arc furnace dust into the furnace to form an off-gas which includes heavy metal and chloride vapors, contacting gas with getter agent to react with chlorine |
| 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 |
| 08/19/1999 | WO1999041417A2 Method for producing high-purity molybdenum chemicals from molybdenum sulfides |
| 08/19/1999 | DE19805893A1 Precious metal especially gold recovery from slags and melting furnace residues |
| 08/18/1999 | EP0815266B1 Method of processing burnt rubbish residues |
| 08/18/1999 | CN1044690C Process for recovery of group VIII noble metals |
| 08/17/1999 | US5939221 Method of recovering Na from sodium-sulfur cells |
| 08/17/1999 | US5938128 Process and apparatus for treating composite elements |
| 08/11/1999 | EP0935005A1 Process for treating metallic dust, mostly oxididised waste, in particular galvanising dust and/or steelworks smoke |
| 08/11/1999 | EP0934432A1 METHOD OF DE-CHROMING AND/OR DEPLETING THE MgO CONTENT OF STEEL SLAG |
| 08/10/1999 | US5935296 Forming a thermal shock resistant bonded solid by mixing a mineral or inorganic material, such as oxygen steelmaking sludge with a lignosulfate, treating with a cationic complexing agent, heating and adding urea to agglomerate |
| 08/04/1999 | EP0836523A4 Process for making shaped copper articles |
| 08/03/1999 | US5932184 Digesting with aqueous naoh; mole ratio of waer sufficient to dissolve the produced sodium tungstate |
| 07/29/1999 | WO1999037824A1 Recovery of group iii element component from group iii-v waste materials |
| 07/29/1999 | WO1999037823A1 High efficiency recovery process and apparatus for the pyrolysis treatment and halogenation of multi-element waste |
| 07/28/1999 | EP0703993B1 Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis |
| 07/27/1999 | US5928602 Metal waste processing facility |
| 07/22/1999 | DE19801321A1 Decontamination of solid materials containing mercury |
| 07/20/1999 | US5926498 Melting furnace for the thermal treatment of special waste materials containing heavy metal and/or dioxin |
| 07/20/1999 | US5925165 Process and apparatus for the 3-stage treatment of solid residues from refuse incineration plants |
| 07/13/1999 | US5922261 Process for recovering iron from iron-rich material |
| 07/08/1999 | WO1999034473A1 Recycling of galvanic cells |
| 07/08/1999 | CA2313173A1 Recycling of galvanic cells |
| 07/07/1999 | CN1222197A Device for producing sponge iron |
| 07/01/1999 | WO1999033137A1 Integrated fixation systems |
| 07/01/1999 | WO1999032673A1 Process for treating a material containing metal and organic matter, including metal separation |
| 07/01/1999 | WO1999032260A1 Method of removing a metallic coating layer from scrap metal pieces |
| 06/29/1999 | US5915634 Method and device for separating harder from less harder material |
| 06/24/1999 | WO1999031285A1 Oxidising elutriation of contaminated sludge containing iron with separation of zinc and lead |
| 06/24/1999 | DE19753389A1 Verfahren zum Aufbereiten eines reaktionsfähigen Gemisches aus Abfallstoffen A method for preparing a reactive mixture of waste materials |
| 06/24/1999 | CA2312037A1 Oxidising elutriation of contaminated sludge containing iron with separation of zinc and lead |
| 06/24/1999 | CA2225980A1 Process for removing the refractory character of ashes containing coinage metals |
| 06/23/1999 | EP0924304A1 Method of producing reduced iron pellets |
| 06/23/1999 | EP0923405A1 Method for accelerated chemical and/or biological remediation and method of using an apparatus therefor |
| 06/23/1999 | CN2325402Y Zinc slag metallurgic recovery furnace |
| 06/23/1999 | CN1220705A Process for producing metallurgical raw material from oil containing heavy metals |
| 06/19/1999 | CA2225367A1 Containerized metal fixation apparatus |
| 06/15/1999 | US5912402 Leaching dust with water for chloride and filtration, reaction with nitric acid, precipitation of iron and demetallization |
| 06/15/1999 | US5911959 Method for purification and production of saline minerals from trona |
| 06/10/1999 | WO1999028414A2 Method for cooling an exothermally fully reacting waste mixture |
| 06/10/1999 | WO1999028000A1 A process for separation of heavy metals and halogen from waste material or residue |
| 06/10/1999 | DE19754209A1 Steelworks dust is treated by partially reduction, selective zinc leaching and lead compound flotation |
| 06/09/1999 | EP0920947A2 Solder skimmer system |
| 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 |
| 06/09/1999 | CN1219207A Metal containing compound reduction and melting process |
| 06/08/1999 | CA2054205C Process for recovering valuable metals from spent catalysts |
| 05/25/1999 | US5906790 Rotation system for press head |
| 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 |
| 05/20/1999 | WO1999024627A1 Method for producing directly-reduced iron, liquid pig iron and steel |
| 05/20/1999 | CA2309606A1 Method for producing directly-reduced iron, liquid pig iron and steel |