| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 10/03/2007 | CN100340681C Improved beneficiation process for concentration/calcination of zinc silicate ores and minerals |
| 09/20/2007 | US20070215019 Method and Use of an Apparatus for Recovery of Metals or Metal Compounds |
| 09/19/2007 | EP1834001A1 Method for the hydrometallurgical treatment of sulfide concentrate containing several valuable metals |
| 09/19/2007 | EP1834000A1 A method and use of an apparatus for recovery of metals or metal compounds |
| 09/19/2007 | CN100338240C Method for removing thallium from a zinc-containing solution |
| 09/12/2007 | CN101035916A Improved method for metal heap and dump leaching coupled with metal solvent extraction |
| 09/12/2007 | CN101035914A Treatment of iron-and-steel plant sludge in a multistage furnace |
| 09/12/2007 | CN101033506A Method of directly leaching zinc ore concentrate or low grade mixing zinc ore under normal pressure and alkaline condition |
| 09/11/2007 | CA2395851C A method for treatment of flue gas cleaning products |
| 08/23/2007 | US20070193413 Heap bioleaching process for the extraction of zinc |
| 08/22/2007 | CN1333091C Process and apparatus for extracting zinc |
| 08/22/2007 | CN101020963A Biological leaching process for separating out metal ions from waste battery directly |
| 08/15/2007 | CN1332046C Zinc recovery process |
| 08/09/2007 | WO2007068025A3 Method for reprocessing metallurgical dust or grinding dust, and apparatus for carrying out said method |
| 08/08/2007 | CN101014723A Preparation of zinc chemicals from the minor flow of a process |
| 08/08/2007 | CN101012514A Method for producing metallic lead and zinc by using lead-zinc containing waste slag or lead-zinc monoxide mine |
| 08/02/2007 | US20070178031 Process for upgrading an ore or concentrate |
| 07/18/2007 | CN1327012C Wet-method for leaching of low-grade high-alkali hybrid copper ore, nickel ore and zinc ore |
| 07/18/2007 | CN100999782A Comprehensive recovering process of multimetal sulfide mineral |
| 07/18/2007 | CN100999751A Process of producing yeast protein by recovered zinc in erythromycin drug refuse and dezinced erythromycin drug refuse |
| 07/12/2007 | WO2007077290A1 Method for improving sulphidic concentrate leaching |
| 07/11/2007 | CN2921036Y Blowing furnace and condensing kiln for extracting zinc and likes non-ferrous metals |
| 07/11/2007 | CN2921035Y Ultrasonic calcium removal tank |
| 07/11/2007 | CN1995417A Oxygen-enriched fuming Zn extraction process of plumbum smelting slag |
| 07/05/2007 | WO2007074207A1 Method for recovering rare metals in a zinc leaching process |
| 07/05/2007 | CA2632923A1 Method for recovering rare metals in a zinc leaching process |
| 06/27/2007 | CN1986909A Normal pressure zinc vapor oxidizing process for preparing four-needle zinc oxide whisker |
| 06/27/2007 | CN1323177C High Iron zinc calcine process method |
| 06/20/2007 | EP1797948A1 Fluorine absorption/desorption agent for electrolysis solution in zinc electrolytic refining, and method for removing fluorine using said fluorine absorption/desorption agent |
| 06/20/2007 | EP1797207A1 Treatment of steel plant sludges in a multi-stage furnace |
| 06/20/2007 | EP1670960B1 Process and apparatus for recovery of non-ferrous metals from zinc residues |
| 06/20/2007 | CN1322151C Metallurgy extraction method by wet method with chloride assistance |
| 06/13/2007 | EP1794334A1 Preparation of zinc chemicals from the minor flow of a process |
| 06/13/2007 | EP1641948B1 Recovery of non-ferrous metals from zinc residues |
| 06/13/2007 | CN2910962Y Cooling tank of two ply vacuum purifying equipment |
| 06/13/2007 | CN1321200C Method for separating copper, arsenic and zinc from copper-smelting high-arsenic flue dust sulphuric acid leach liquor |
| 06/07/2007 | WO2007034413A3 Process for the indirect bioleaching of zinc sulphide |
| 06/07/2007 | US20070125197 Recovery of non-ferrous metals from zinc residues |
| 06/06/2007 | EP1721021B1 Recycling of hot-dip zinc galvanizing bath |
| 06/06/2007 | CN1974791A Production process of extracting zinc oxide and pig iron from cinder and slag containing Zn, Fe and P6 |
| 06/05/2007 | US7227882 System and method of processing electric arc furnace dust |
| 05/23/2007 | CN1317405C High vacuum in-situ two-step refining process for high purity material |
| 05/08/2007 | US7214516 Adding an enhancing-bacteria to the soil and planting a metal-extracting plant in the soil, wherein the ability of the metal-extracting plant to extract metal present in the soil is enhanced by the presence of the enhancing-bacteria |
| 05/03/2007 | US20070095169 metallurgy; zinc separation; flash or agitated bath fuming step, to produce an Fe-bearing slag and Zn- and Pb-bearing fumes; recovering Cu and the precious metals |
| 04/19/2007 | WO2007042604A1 A method for leaching metal sulphide minerals |
| 04/12/2007 | WO2007039664A1 Sodium chloride processing of nickel sulphide ore or concentrates |
| 04/12/2007 | WO2007039663A1 Processing of nickel sulphide ore or concentrates with sodium chloride |
| 04/12/2007 | US20070079667 Method of producing stainless steel by re-using waste material of stainless steel producing process |
| 04/12/2007 | CA2624609A1 Processing of nickel sulphide ore or concentrates with sodium chloride |
| 04/04/2007 | CN1308471C Method for obtaining cobalt and nickel from ores and ore concentrates |
| 03/29/2007 | WO2007034413A2 Process for the indirect bioleaching of zinc sulphide |
| 03/29/2007 | CA2663356A1 Process for the indirect bioleaching of zinc sulphide |
| 03/28/2007 | CN1938436A Recovery of metals from oxidised metalliferous materials |
| 03/28/2007 | CN1936036A Process for removing chloride fromiznc electrolytic solution by using silver hydroxide |
| 03/20/2007 | CA2251099C Recovery of metal from dross |
| 03/14/2007 | EP1740731A4 Iron oxide precipitation from acidic iron salt solutions |
| 03/07/2007 | CN1924037A Method of comprehensive utilizing tin-zinc containing magnetic concentrate |
| 03/07/2007 | CN1303235C Dressing and smelting united technology for processing refractory copper zinc ore mixtures |
| 03/07/2007 | CN1303232C Zinc oxide raw ore fluidization leaching process |
| 03/07/2007 | CN1303231C Zinc sulfide concentrate calcines and zinc ide ore combined leaching process |
| 03/01/2007 | US20070048203 removal of Cu from a concentrated chloride-containing ZnSO4 raw solution that is going to an electrolytic preparation of zinc, using chelating alkyl-silylated silica-based ion exchanger having polyamine group, comprising routing raws solution to an ion exchange stage; purifying copper free raw solution |
| 02/28/2007 | CN1302122C Reduction smelting method in a shaft furnace with recovery of volatile secondary metals |
| 02/13/2007 | US7175691 Method of producing stainless steel by re-using waste material of stainless steel producing process |
| 02/06/2007 | US7172074 Grinding; screening, storage, separation |
| 01/31/2007 | CN1906315A Method of slag fuming |
| 01/31/2007 | CN1904095A Graphite beating belt fast cooling type zinc smelting furnace |
| 01/31/2007 | CN1904091A Method of extractin zinc from low grade zinc ore |
| 01/24/2007 | EP1565585A4 Process and apparatus for extracting zinc |
| 01/24/2007 | CN1900330A Low pollution vanadium settling iron-removing wet zinc smelting method |
| 01/10/2007 | EP1740731A1 Iron oxide precipitation from acidic iron salt solutions |
| 01/10/2007 | CN2856061Y Novel zinc-smelting furnace |
| 01/03/2007 | CN1888100A Regeneration process of zinc plated steel wire with drawing peeled-off zinc |
| 01/03/2007 | CN1293232C Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |
| 01/02/2007 | US7157064 Preparing an aqueous suspension of the solid or semisolid waste material, separating the solid and liquid material to obtain solid waste and liquid waste solution, collecting solid waste, repeating above steps, acidifying liquid waste |
| 12/27/2006 | CN1884595A Method for extracting zinc etc. nonferrous metal using apparatus of air furnace connecting with condensation kiln |
| 12/21/2006 | WO2006133777A1 Separation of metal values in zinc leaching residues |
| 12/21/2006 | CA2611925A1 Separation of metal values in zinc leaching residues |
| 12/14/2006 | US20060278042 Method of producing stainless steel by re-using waste material of stainless steel producing process |
| 12/13/2006 | CN1878879A Process and apparatus for recovery of non-ferrous metals from zinc residues |
| 12/13/2006 | CN1876856A Vertical reduction tank and reduction furnace device for metal smelting |
| 12/06/2006 | EP1727916A1 Recovery of metals from oxidised metalliferous materials |
| 12/06/2006 | CN1288259C Process for extracting zinc and indium from low-grade zinc concentrates by wet method |
| 12/05/2006 | CA2303650C Multiple coherent jet lance |
| 11/29/2006 | CN1869260A Method and device of refining separating zinc by bismuth method |
| 11/22/2006 | CN1865461A Method for floatation and recovery of lead zinc mixed concentrate from gold mine cyaniding slag tails |
| 11/16/2006 | WO2006119611A1 A process for the treatment of electric and other furnace dusts and residues containing zinc oxides and zinc ferrites |
| 11/16/2006 | CA2590927A1 A process for the treatment of electric and other furnace dusts and residues containing zinc oxides and zinc ferrites |
| 11/15/2006 | EP1721021A1 Recycling of hot-dip zinc galvanizing bath |
| 11/08/2006 | CN1858533A Smelting tunnel kiln |
| 11/08/2006 | CN1283815C Method for extracing zinc from waste zinc acetate |
| 10/17/2006 | US7122164 Having significant activity for multivalent cations; useful for removing a contaminant metal ion from a contaminated solution |
| 10/11/2006 | CN1844423A Crude zinc smelting method and smelting furnace therefor |
| 10/04/2006 | CN1842608A Iron oxide precipitation from acidic iron salt solutions |
| 09/28/2006 | US20060213332 Zinc calcine and zinc sulphide, are leached in three stages, in which the sulphuric acid content of the stages rises in accordance with the direction in which the solids are moving; solids and solution formed in the leaching stages are routed countercurrently |
| 09/27/2006 | CN1837386A Wet-method for leaching of low-grade high-alkali hybrid copper ore, nickel ore and zinc ore |
| 09/27/2006 | CN1837383A Method for reclaiming zinc and stannum from zinc stannum alloy by vacuum distillation |
| 09/20/2006 | CN1276108C Chloride melt process for the separation and recovery of zinc |
| 09/20/2006 | CN1276103C Method for stabilization of fluidized bed in roasting furnace |
| 09/19/2006 | CA2214523C Purification of metal containing solutions |
| 09/13/2006 | EP1339882B1 Method for reducing build-up on a roasting furnace grate |