| Patents for C22B 13 - Obtaining lead (1,881) |
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| 09/27/1988 | US4773630 Tank furnace for the metallurgical treatment of non-ferrous metals |
| 09/13/1988 | US4770698 Method for making low alpha count lead |
| 09/06/1988 | US4769116 Hydrometallurgical process for an overall recovery of the components of exhausted lead-acid batteries |
| 08/23/1988 | US4765829 Treating lead- and zinc-containing steelmaking byproducts |
| 08/03/1988 | CN87100487A Blast furnace smelting for lead-tin paragenetic mineral |
| 08/02/1988 | CA1239798A1 Process for recovering valuable metals from an iron dust containing a higher content of zinc |
| 07/27/1988 | EP0276032A1 Instant smelting process for sulfidic ores |
| 07/27/1988 | EP0275863A1 Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| 07/19/1988 | US4758271 Continuous copper drossing of lead |
| 07/19/1988 | US4758268 Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| 06/01/1988 | EP0182892B1 A method and apparatus for separating metal particles |
| 05/04/1988 | EP0163666B1 Treatment of dross |
| 05/04/1988 | CN87106009A Removal thallium method of raw lead and refined lead |
| 05/03/1988 | US4741770 Zinc smelting process using oxidation zone and reduction zone |
| 04/13/1988 | CN85102241B Releasing tin metal in high lead low tin alloy and apparatus therefor |
| 04/12/1988 | US4737186 Using carbon dust |
| 04/06/1988 | CN87102096A Additive agent for lead electrolysis |
| 03/30/1988 | CN87104574A New technique of fire refining method for bullion lead |
| 03/24/1988 | DE3631196A1 Process for removing thallium from crude lead and high-purity lead |
| 03/10/1988 | WO1988001654A1 Process for the treatment of lead-zinc ores, concentrates or residues |
| 03/02/1988 | CN86103750A Acid leaching carbonization for separating lead and tin and mfg. industrial chemicals |
| 02/23/1988 | CA1233029A1 Method for producing metallic lead by direct lead- smelting |
| 02/23/1988 | CA1233027A1 Method for recovering the metal values from materials containing tin and/or zinc |
| 02/02/1988 | CA1232141A1 Treatment of dross |
| 01/14/1988 | DE3641136C1 Metallurgical vessel |
| 11/26/1987 | DE3617410A1 Method of processing old car batteries |
| 11/19/1987 | WO1987006804A1 Shoe and fitting for shoe freely adaptable to foot |
| 11/11/1987 | EP0244433A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 11/10/1987 | US4705562 Method for working-up waste products containing valuable metals |
| 10/27/1987 | CA1228483A1 Process for the pressure oxidation acid leaching of non-ferrous metal and iron-containing sulphidic material |
| 10/15/1987 | DE3612491A1 Process for recovering lead from oxidic or oxidic/sulphatic secondary precursor materials |
| 09/29/1987 | CA1227340A1 Separation of lead from other metals |
| 09/22/1987 | US4695319 Metal distillation method utilizing double vaporization |
| 08/19/1987 | EP0233121A1 Process for removing lead from rare earths |
| 08/19/1987 | EP0232766A2 Process for eliminating heavy metals from mineral acids |
| 08/11/1987 | CA1225242A1 High temperature softening of lead bullion |
| 08/04/1987 | CA1224926A1 Method for working-up complex sulphidic ore concentrates |
| 07/07/1987 | US4678507 Treatment of dross |
| 06/16/1987 | US4673431 Furnace dust recovery process |
| 06/16/1987 | CA1222872A1 Refining process for removing antimony from lead bullion |
| 06/02/1987 | CA1222378A1 Method for producing lead from sulphidic lead raw materials |
| 05/26/1987 | CA1222140A1 Method for recovery of zn and pb from iron and steel dust |
| 05/21/1987 | WO1987003010A1 Top submerged lancing reactor and direct smelting of zinc sulphide materials therein |
| 05/12/1987 | CA1221549A1 Process for metal-enrichment of lead bullion |
| 04/30/1987 | DE3537852A1 Process for treating zinc- and lead-containing metallurgical slags |
| 04/23/1987 | DE3539164C1 Process and smelting furnace for producing non-ferrous metals |
| 04/23/1987 | DE3536635A1 Process and equipment for recovering especially iron as well as zinc, lead and other non-ferrous metal constituents from oxide materials of high iron content |
| 04/21/1987 | CA1220611A1 Electrochemical elimination of nickel, antimony, arsenic and tin from a lead chloride solution |
| 04/15/1987 | CN85107626A Process for the pressure oxidation of acid leaching of non-ferrous metal and iron-containing sulphide |
| 04/09/1987 | WO1987002068A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 04/08/1987 | EP0217139A1 Working up zinc- and lead-bearing residual materials obtained in steel making industryin view of a further metallurgical treatment |
| 04/07/1987 | US4655928 Recycling |
| 04/07/1987 | US4655437 Vertical shaft with plasma arc that melts and vaporizes |
| 04/07/1987 | CA1220036A1 Method for producing lead from oxidic lead raw materials which contain sulphur |
| 04/01/1987 | CN85107125A Method and device for extract lead directly from galena |
| 03/18/1987 | EP0214268A1 A method for working-up waste products containing valuable metals. |
| 03/17/1987 | CA1219134A1 Process for the selective dissolution of lead from mixed minerals containing zinc |
| 03/17/1987 | CA1219133A1 Continuous direct process of lead smelting |
| 02/03/1987 | CA1217347A1 Process for recovering lead from lead chloride containing raw material |
| 02/03/1987 | CA1217346A1 Hydrometallurgical recovery of metal values from copper containing sulphide materials |
| 01/31/1987 | CN85101694A Method for producing metallic lead by direct lead-smelting |
| 01/22/1987 | DE3525160A1 Pyrometallurgical furnace installation for smelting fusible materials such as ore concentrate |
| 01/17/1987 | CN85102241A Releasing tin metal in high lead low tin alloy and apparatus therefor |
| 01/10/1987 | CN85101919A Method for recovering the metal values from materials containing tin and/or zinc |
| 01/06/1987 | CA1216157A1 Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore |
| 12/31/1986 | CN85105034A Shuiko mountain method of smelt lead |
| 12/02/1986 | CA1214648A1 Separation of elemental lead from blast furnace bullion |
| 11/06/1986 | EP0159349A4 Processes for treating waste streams. |
| 10/29/1986 | CN86102264A Smelting process |
| 10/21/1986 | CA1212842A1 Method of processing lead sulphide or lead/zinc sulphide ores, or sulphide concentrates, or mixtures thereof |
| 10/08/1986 | EP0196800A1 Secondary lead production |
| 10/07/1986 | CA1212244A1 Continuous method of removing tin from lead |
| 10/07/1986 | CA1212243A1 Means for separating solid and molten particles from the exhaust gases of metallurgical furnaces and way to recover lead from such gases |
| 10/07/1986 | CA1212242A1 Recovery of zinc from zinc-containing sulphidic material |
| 10/01/1986 | CN86100416A Apparatus for the pyrometallurgical processing of fine-grained solids to make molten products |
| 09/30/1986 | US4614541 Smelting under reducing, neutral, or oxidizing conditions |
| 09/16/1986 | US4612041 Process for recovering valuable metals from an iron dust containing a higher content of zinc |
| 09/16/1986 | CA1211292A1 Method for separating nonferrous metals from iron- oxide-containing residues |
| 09/16/1986 | CA1211290A1 Selective extraction of leau from its sulphides |
| 09/12/1986 | WO1986005211A1 A method for working-up waste products containing valuable metals |
| 09/10/1986 | EP0193976A1 Apparatus for the pyrometallurgical treatment of fine-granular solid materials to obtain fused products |
| 09/02/1986 | CA1210735A1 Method and apparatus for reclaiming storage battery components |
| 08/19/1986 | US4606763 Using autoclave with successive compartments the first being largest in size |
| 08/19/1986 | US4606760 Method and apparatus for simultaneously separating volatile and non-volatile metals |
| 07/29/1986 | CA1208444A1 High intensity lead smelting process |
| 07/23/1986 | CN85203570U Eutectic alloy crystallized with continual spiral rotation-liquated composite |
| 07/16/1986 | EP0187194A2 Metal distillation method and apparatus utilizing double vaporization |
| 07/08/1986 | CA1207152A1 Process for recovering metals of high commercial value contained in a mud |
| 07/02/1986 | EP0185879A2 Shaft furnace for the treatment of waste lead and battery scrap with a post-combustion installation for the exhaust gases |
| 06/17/1986 | CA1206008A1 Recovery of zinc from zinc-containing sulphidic material |
| 06/04/1986 | EP0182892A1 A method and apparatus for separating metal particles. |
| 05/20/1986 | CA1204598A1 Procedure for producing lead bullion from sulphide concentrate |
| 05/13/1986 | US4588436 Method of recovering metals from liquid slag |
| 04/22/1986 | US4584017 Method for producing metallic lead by direct lead-smelting |
| 04/01/1986 | CA1202491A1 Metal sulphide extraction |
| 03/26/1986 | EP0175556A2 Process for the pressure oxidation leaching of non-ferrous metal containing sulphidic material |
| 03/25/1986 | US4578254 Process for the refining of sulfidic concentrates which contain arsenic, antimony and bismuth |
| 03/19/1986 | EP0174641A2 A process for recovering valuable metals from an iron dust containing a higher content of zinc |
| 03/11/1986 | CA1201596A1 Method for desilverizing and removal of other metal values from lead bullion |
| 02/25/1986 | US4572822 Leaching with sulfuric acid in sulfur dioxide atmosphere |