| 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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| 09/15/1981 | CA1108866A1 Process for the treatment of incinerated sewage sludge ash |
| 09/08/1981 | US4288246 Immersion in molten bath of cryolite, aluminum fluoride, sodium and potassium chloride |
| 09/08/1981 | CA1108410A1 Method for processing storage-battery lead scrap |
| 09/08/1981 | CA1108406A1 Method for removing oil from mill scale and recovering metallic values therein |
| 09/01/1981 | US4286985 For ingesting and melting scrap metal |
| 08/26/1981 | EP0034579A1 Process and apparatus for treating dross and liquid scum |
| 08/26/1981 | EP0034389A1 Method of agglomeration of fly ash into pellets |
| 08/26/1981 | EP0034236A1 Separation of chromium from scrap |
| 08/18/1981 | CA1107082A1 Process for the recovery of metal from a solution by precipitation |
| 08/11/1981 | US4283224 Containing precious metals, tin dioxide, lead sulfate by complexing, carbonating, leaching the solid residue, ion exchanging |
| 08/11/1981 | US4283223 Process for treating smoke from steel plants |
| 08/11/1981 | CA1106613A1 Process for removing mercury from brine sludges |
| 08/04/1981 | CA1106169A1 Scrap preheater modulator roof assembly |
| 07/28/1981 | CA1105714A1 Method and apparatus for continuously leaching ore |
| 07/21/1981 | US4279644 Recovery of silver from photographic processor effluents |
| 07/14/1981 | US4278644 Process for partitioning Mo and W from a mixed CaMoO4 -CaWO4 precipitate |
| 07/14/1981 | CA1104835A1 Method of and electric furnace for processing nonferrous molten slags |
| 07/14/1981 | CA1104833A1 Removal of magnesium from an aluminum alloy |
| 07/14/1981 | CA1104827A1 Process for treating a mud produced during gas scrubbing in a blast furnace or a steelworks |
| 07/08/1981 | EP0031408A2 Method for separating metal from soot |
| 06/30/1981 | US4276266 Process for recovering metal elements from carbonaceous products |
| 06/30/1981 | US4276100 Process for disposing of decoy flare material |
| 06/30/1981 | US4275847 Alkyl ether amines as flotation agents |
| 06/30/1981 | CA1103939A1 Hydrometallurgical process for the treatment of soluble silicate-bearing materials |
| 06/23/1981 | US4274785 Method and apparatus for charging anode scraps to a converter furnace |
| 06/17/1981 | EP0030345A2 Process for smelting antimonial preliminary materials of high lead content |
| 06/16/1981 | CA1103034A1 Process for recovering molybdenum from waste |
| 06/09/1981 | CA1102557A1 Desorption of gold from activated carbon |
| 06/02/1981 | CA1102141A1 Process for the extraction of non-ferrous metals from slags and other metallurgical by-products |
| 05/28/1981 | WO1981001420A1 A process for recovering non-ferrous metal values from ores,concentrates,oxidic roasting products or slags |
| 05/26/1981 | US4269676 Leaching using a solvent mixture of pyridine, a-, b-, or g-picoline or 2,6-lutidine and a chlorinated methane to form a soluble metal complex |
| 05/26/1981 | US4269398 Means for reclaiming galvanizing quality zinc alloy from continuous galvanizing line top dross |
| 05/26/1981 | CA1101676A1 Method for working-up waste slag from the oxygen steel production |
| 05/19/1981 | US4268188 Process for reducing possibility of leaching of heavy metals from used petroleum cracking catalyst in land fills |
| 05/13/1981 | EP0028341A1 Process for the recovery of residues produced during the manufacture and working of steel |
| 05/12/1981 | US4266966 Steelmaking dust is purified by pelletization, heating with a reducing agent, and exploding the pellets |
| 05/06/1981 | EP0027849A1 Slag-conditioning process |
| 05/05/1981 | CA1100284A1 Method for obtaining aluminium oxide |
| 04/30/1981 | WO1981001155A1 Metal recovery method |
| 04/29/1981 | EP0027769A1 Metal recovery method |
| 04/28/1981 | US4264203 Inspection of the interior of an enclosure |
| 04/21/1981 | US4262825 Louvered clamshell door assembly for preheater charging bucket |
| 04/14/1981 | US4261738 Process for recovering precious metals from bimetallic material |
| 04/14/1981 | US4261737 Leaching ore with ammoniacal ammonium salt solution, adsorption oncarbon which has been pretreated with acid |
| 04/14/1981 | CA1099245A1 Method and apparatus for removing zinc type metals and compounds in dust recovery process in iron manufacture |
| 04/14/1981 | CA1099080A1 Pyrohydrolysis system for processing fluorine- containing spent and waste materials |
| 04/07/1981 | US4260419 Silicon, iron, magnesium |
| 04/07/1981 | US4260414 Process for recovering and utilizing useful substances from molten metal produced during reduction treatment of steel slag |
| 03/31/1981 | US4259296 Recovery of chromium from scrap |
| 03/31/1981 | CA1098323A1 Process for recovery of zinc from the dust of an iron- making or steel-refining furnace |
| 03/24/1981 | US4257807 Precious metals recovery process |
| 03/24/1981 | CA1097927A1 Nickel recovery |
| 03/17/1981 | CA1097508A1 Recovery of metal values |
| 03/17/1981 | CA1097507A1 Process of treating residues from the leaching of roasted zinc blende |
| 03/03/1981 | CA1096636A1 Hydrometallurgical process for the selective dissolution of mixtures of oxy compounds |
| 03/03/1981 | CA1096588A1 Recovery of selenium |
| 02/24/1981 | US4252775 Recovering a lead-bearing by-product by leaching with sulfuric acid in countercurrent stages |
| 02/24/1981 | US4252563 Process for the fuming treatment of metallurgical slag |
| 02/17/1981 | US4251266 Method for taking care of metallic waste products by remelting |
| 02/10/1981 | US4250027 Scouring |
| 02/10/1981 | US4249989 Isolating solid substances from a vapor and gas mixture and pulps |
| 02/10/1981 | CA1095261A1 Method for the reclamation of zinc from galvanizing baths |
| 02/03/1981 | CA1094818A1 Process for the separation of recuperable values in titanium residues in sulphate form |
| 01/20/1981 | USRE30488 Method for preparing dry collected fume for use in metallurgical furnaces |
| 01/20/1981 | CA1094138A1 Method and apparatus for melting machining chips |
| 01/20/1981 | CA1094011A1 Dichromate leach of copper anode slimes |
| 01/20/1981 | CA1093836A1 Recovery of metal values from reverberatory slag |
| 01/20/1981 | CA1093834A1 Pyrometallurgical recovery of copper from slag material |
| 01/20/1981 | CA1093829A1 Chlorination of titanium slags |
| 01/13/1981 | US4244735 Chloride leach process for recovering metal values in the presence of arsenic |
| 01/13/1981 | US4244734 Hydrometallurgy or pyrometallurgy |
| 01/13/1981 | US4244562 Powder injection apparatus for injection of powder into molten metal |
| 01/13/1981 | US4244492 Packaging for reclaiming scrap metal |
| 01/07/1981 | EP0021922A1 Process and apparatus for hydrometallurgical treatment of metallurgical dust and the application of this process and apparatus to blast furnace flue dust |
| 01/07/1981 | EP0021809A1 Chloride leaching |
| 12/30/1980 | US4242127 Process for treating hydroxide sludge residues containing nonferrous metals |
| 12/30/1980 | CA1092366A1 Recovery of unoxidized metals from organic insulated metallic scrap |
| 12/30/1980 | CA1092365A1 Refining of ferrous and base metal sulphide ores and concentrates |
| 12/23/1980 | US4240617 Ultra low volume processing of and cartridge for photographic fixer solution to recover silver therefrom |
| 12/09/1980 | US4238222 Waelz process of volatilizing zinc and lead from iron oxide-containing materials |
| 12/09/1980 | CA1091040A1 Method of recovering metals out of soot originating from the combustion of oil |
| 12/02/1980 | CA1090585A1 Process for the separation of copper sulfide from metallic lead entrained in a dross |
| 11/18/1980 | CA1089651A1 Method for the concentration of alkaline bismuthide in a material also containing molten lead |
| 11/04/1980 | CA1088757A1 Process for extracting nickel, nickel-copper, nickel- cobalt and nickel-copper-cobalt from concentrates or slags bearing the same |
| 10/30/1980 | WO1980002235A1 A method and an apparatus for gathering valuable floating,dissolved and suspended substances from sea water |
| 10/29/1980 | EP0018340A1 An offshore plant for recovery of valuable floating, dissolved and suspended materials from sea water |
| 10/21/1980 | CA1087861A1 Recovery of valuable metals and compounds thereof contained in molten slag |
| 10/15/1980 | EP0017285A1 Process for the recovery of metals from catalysts used in the hydrodesulfurization of hydrocarbons |
| 10/14/1980 | US4227922 Recovering scrap metals such as tin |
| 10/14/1980 | US4227681 Metal filler, porous pad |
| 09/30/1980 | US4225565 Process for treating waste slags |
| 09/30/1980 | US4225342 Treatment of zinc plant leach residues for recovery of the contained metal values |
| 09/30/1980 | CA1086506A1 Continuous recovery of base metal from insulated wire scrap |
| 09/23/1980 | CA1086074A1 Volatilization of impurities from smelter reverts |
| 09/16/1980 | US4222872 Reclamation of molybdenum or other heavy metals from wastewater treatment skimmings |
| 09/16/1980 | US4222769 Reaction with ammonium carbonate to lead carbonate and ammonium sulfate; roasting, reducing to lead |
| 09/16/1980 | CA1085620A1 Process for the production of blister copper from ores and concentrates |
| 09/09/1980 | US4221591 Continuous tapping using sloping hearth furnace |
| 09/02/1980 | US4220320 Silver recovery apparatus |
| 08/20/1980 | EP0014255A1 Process for the densification of flue dust containing zinc oxides |