| Patents for C22B 13 - Obtaining lead (1,881) |
|---|
| 08/24/1995 | DE19505339A1 Suspension melting of finely divided sulphur-contg. ores |
| 08/23/1995 | CN1107183A Method and apparatus for suspension smelting |
| 08/15/1995 | US5441609 Process for continuous electrochemical lead refining |
| 08/08/1995 | US5439504 Direct-reduction process for directly reducing particulate iron-oxide-containing material |
| 08/08/1995 | US5439498 Plasma arc furnace unit having plasma arc torch that converts battery casings into combustible gas, volatilizes lead contaminatns and vitrifyes the soil |
| 07/04/1995 | US5429661 Method of recovering lead from recycable lead-containing raw material |
| 06/14/1995 | EP0657230A1 Process and system for the on-site remediation of lead-contaminated soil and waste battery casings |
| 05/24/1995 | EP0654538A1 Method for working up zinc-, lead- and iron oxide-bearing material by the rotary-kiln volatilising process |
| 05/17/1995 | EP0653252A1 Process and system for the remediation of soil containing waste material |
| 04/26/1995 | EP0641865A4 Method of reprocessing lead-containing materials. |
| 04/19/1995 | EP0648192A1 A method of obtaining lead and organolead from contaminated media using metal accumulating plants |
| 04/05/1995 | EP0646185A1 Production of metals from minerals |
| 04/04/1995 | US5403380 Method for producing easily volatile metals, such as zinc, lead, mercury and cadmium, of sulfidic raw materials |
| 03/08/1995 | EP0641865A1 Method of reprocessing lead-containing materials |
| 03/08/1995 | EP0641394A1 Oxygen smelting. |
| 02/28/1995 | US5393892 Processes for removing, separating and concentrating lead, thallium, alkali metals, alkaline earth metals from concentrated matrices using macrocyclic polyether cryptand ligands bonded to inorganic supports |
| 02/15/1995 | EP0638667A1 Process for continuous electrochemical lead refining |
| 02/14/1995 | US5388756 Method and apparatus for removing contaminants from solder |
| 01/31/1995 | US5385598 Varying heating of upper and lower zones to obtain temperature gradients which cause migration of one metal to hotter zone, then cooling to cause formation of intermetallic which will rise or settle according to its density, then removal |
| 01/18/1995 | CN1027457C Flame furnace for melting Pb containing materials of waste batteries continuously |
| 01/17/1995 | CA1333960C Hydrometallurgical process for an overall recovery of the components of exhausted lead-acid batteries |
| 01/11/1995 | EP0633324A1 Process and device for the removal of tin, arsenic and antimony from molten lead |
| 01/11/1995 | EP0632843A1 Process and plant for removing lead and zinc from metallurgical-works dust. |
| 01/10/1995 | US5380354 Recovery of metals from sulphidic material |
| 01/09/1995 | CA2127674A1 Process for removing tin, arsenic and antimony from molten lead |
| 12/27/1994 | CA1333664C Method for softening lead bullion |
| 12/22/1994 | WO1994013844A3 Method of reprocessing lead-containing materials |
| 12/21/1994 | CN2185876Y Lead smelting reverberatory furnace |
| 12/06/1994 | US5370724 Pyrolysis in a plasma arc furnace to form vitrified slag and a combustible gas |
| 11/30/1994 | EP0626457A1 Method for working up zinc- and lead-bearing steel plant residues |
| 11/30/1994 | CN1026800C Processing for removal of thallium from coarse lead |
| 11/28/1994 | CA2123378A1 Method of reprocessing residual metallurgical materials which contain zinc and lead |
| 11/24/1994 | WO1994026943A1 Process for removing, separating, and concentrating metals |
| 11/24/1994 | WO1994026941A1 Method and equipment for thermolytic vacuum processing of solid products, with continuous separation and recovery of a liquid fraction of these products |
| 11/23/1994 | EP0625216A1 Process for remediation of lead-contaminated soil and waste battery casings |
| 11/17/1994 | EP0624656A1 Process and installation for the treatment of solid products by vacuumthermolysis with continuously separation and recovery of a liquid fraction of these products |
| 11/10/1994 | WO1994025632A1 Recovery of metals from sulphidic material |
| 10/19/1994 | EP0619764A1 Process for removing heavy metals from soils. |
| 10/18/1994 | US5356455 Process for recovering lead from lead-containing raw materials |
| 10/18/1994 | US5355814 Gasifier burner for powdered solid fuels and method for using the same |
| 09/01/1994 | WO1994019501A1 Process for the treatment of electric arc furnace dust |
| 08/30/1994 | US5342428 Melting lead out; fluidization to separate fines from aluminum |
| 08/24/1994 | CN1091157A Production of metal from minerals |
| 08/09/1994 | US5336297 Process for the treatment of electric arc furnace dust |
| 08/02/1994 | CA1331099C Removal of thallium from impure lead |
| 06/23/1994 | WO1994013844A2 Method of reprocessing lead-containing materials |
| 06/21/1994 | CA1330259C Method for cooling gases and/or vapours from non-ferrous metal treatment plants, and the relative apparatus |
| 06/14/1994 | US5320663 Method of obtaining lead and organolead from contaminated media using metal accumulating plants |
| 05/26/1994 | WO1994011538A1 Process for remediation of lead-contaminated soil and waste battery casings |
| 05/26/1994 | CA2124005A1 Method for remediation of lead-contaminated soil and waste battery casings |
| 04/27/1994 | EP0594470A1 Process for the recovery of lead from the active material of waste batteries and electric furnace to carry out the process |
| 04/14/1994 | DE4233672A1 Environment friendly disposal of clarification sludge - by drying, conditioning and use as fuel in ore smelting. |
| 03/30/1994 | CN1084488A Process and plant for removing lead, cadmium and zinc from dusts |
| 03/23/1994 | EP0588235A1 Process for recovering lead from lead-containing raw materials |
| 03/16/1994 | EP0586910A1 Process and installation for removing lead, cadmium and zinc from dusts |
| 03/12/1994 | CA2106014A1 Process for the recovery of lead, especially the lead contained in active substances of used batteries and in electric furnaces used for implementing said process |
| 03/02/1994 | CN1023904C Smelting process |
| 02/08/1994 | US5284503 Process for remediation of lead-contaminated soil and waste battery |
| 02/01/1994 | US5282938 Air pollution control |
| 01/20/1994 | WO1994001367A1 A method of obtaining lead and organolead from contaminated media using metal accumulating plants |
| 01/20/1994 | CA2138979A1 A method of obtaining lead and organolead from contaminated media using metal accumulating plants |
| 01/18/1994 | US5279643 Agglomeration with aluminum refining sludge; reduction, separation |
| 01/06/1994 | WO1994000606A1 Production of metals from minerals |
| 01/05/1994 | CN1080325A Method for producing easily volatile metals, such as zinc, lead and cadmium, of sulphidic raw materials |
| 12/29/1993 | EP0575768A1 Method of recovering lead from recycable lead-containing raw material |
| 12/09/1993 | WO1993024666A1 Oxygen smelting |
| 12/09/1993 | CA2136425A1 Oxygen smelting |
| 11/24/1993 | EP0571358A1 Process for the direct reduction of particulate material containing iron oxide |
| 11/24/1993 | EP0570942A1 Method for producing easily volatile metals, such as zinc, lead and cadmium, of sulfidic raw materials |
| 10/26/1993 | US5256186 Method for the treatment of dusts and concentrates |
| 10/20/1993 | CN1077499A Process for refining bismuth |
| 10/15/1993 | CA2093693A1 Process for refining bismuth |
| 10/06/1993 | CN1022332C Method for concentrating high-content gold in raw lead |
| 09/30/1993 | WO1993019213A1 Process and plant for removing lead and zinc from metallurgical-works dust |
| 09/30/1993 | DE4209891A1 Verfahren zur Aufbereitung von Zink und Blei enthaltenden Hüttenwerksstaub Process for the preparation of zinc and lead-containing foundry dust |
| 09/21/1993 | US5246484 Injection of a reducing agent and oxygen to improve gasification |
| 08/17/1993 | US5236491 Contacting with selective anionic resin; maintaining pH between 4.0 and 5.5; elution with mineral acid; treating eluate |
| 08/10/1993 | US5234492 Cupellation |
| 07/21/1993 | EP0551992A1 Process for recovering valuable metals from an iron dust |
| 07/20/1993 | US5229003 Recovery of base materials from geothermal brines |
| 07/18/1993 | CA2086857A1 Process for recovering valuable metals from an iron dust |
| 07/14/1993 | EP0551155A1 Process for recovering zinc and lead from flue dusts from electrical steel works and for recycling said purified metals to the furnace, and installation for implementing said process |
| 06/29/1993 | US5223021 Iron as a co-additive in refining crude lead bullion |
| 05/27/1993 | WO1993006952A3 Process for removing heavy metals from soils |
| 04/29/1993 | DE4200963C1 Appts. for sepg. mixt. of small pieces of metals - comprises rotatable furnace with chargeable arrangement at one end and with perforations in outer wall to allow lowest m.pt. metal to escape |
| 04/28/1993 | EP0538717A1 Method for the pyrometallurgical treatment of iron oxides and heavy metals contained in the fumes of electric arc furnaces |
| 04/28/1993 | CN1020381C Conversion treatment of lead-base gold or lead ores with soda |
| 04/22/1993 | CA2080879A1 Method for the pyrometallurgical treatment of iron oxides and heavy metals contained in the fumes of electric arc furnaces |
| 04/15/1993 | WO1993006952A2 Process for removing heavy metals from soils |
| 04/15/1993 | WO1992019699A3 Process for purifying lead using calcium/sodium filter cake |
| 04/15/1993 | CA2119021A1 Process for removing heavy metals from soil |
| 03/17/1993 | CN1020117C Long-life measure of an active EBV st 45.8/III furnace steel pipe of GFR |
| 03/10/1993 | EP0530893A1 Method for continuously melting metallic lead |
| 03/03/1993 | CN2127781Y Smelting regeneratory furnace for waste lead accumulators |
| 02/23/1993 | US5188795 Battery recycling, reduced heat loss |
| 02/02/1993 | US5183497 Iron and a copper speiss as co-additives in refining crude lead bullion |
| 02/02/1993 | US5183496 Copper speiss as a co-additive in refining crude lead bullion |
| 01/07/1993 | EP0328613B1 Metallurgical controlling method |
| 01/07/1993 | DE4122729A1 Recovery of silver@ from suspension after enzymatic sepn. from film waste - by acidifying, flocculating with sodium sulphite and precoat filtration |
| 12/15/1992 | US5171550 Adding anhydrous ferrous chloride and withdrawing thallium-containing salt slag |