Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 6602322 | High temperature metal recovery process An improved method and apparatus for recovering metal values from Electric Arc Furnace dust, particularly zinc and iron values, by mixing EAF dust and carbonaceous fines to form a particulate mixture; heating the mixture at a sufficient temperature and fo... | 08/05/2003 |
| 6395060 | Furnace flue dust processing method A method of processing flue dust, where the flue dust contains one or more compounds from a first group of zinc, lead and cadmium compounds, and contains one or more compounds from a second group of iron, silicon, calcium, magnesium and aluminum compounds... | 05/28/2002 |
| 6083295 | Method of processing finely divided material incorporating metal based constituents Finely divided material, such as flue dust from a steel making furnace, is processed to reclaim constituents. The material in hopper (11) is pelletized. The pellets are dried in a dryer (16) and fed to a first rotary kiln (21) where they are sintered to p... | 07/04/2000 |
| 6030433 | Method for extracting metals from metal-containing materials by pyrohydrolysis A method for extracting metals from metal-containing materials, especially waste, by pyrohydrolysis. The metal-containing materials which contain at least one or more of the metals from the group consisting of Zn, Cd, Pb, Hg, Cu, Sn (as Sn(0) and Sn(II)),... | 02/29/2000 |
| 6024931 | Process for removing mercury from mercury contaminated materials Mercury-contaminated substances are fed through a shredder to a loader that loads a rotary tubular kiln, in which a mercury content is evaporated by a primary burner. A temperature of an unlined rotary kiln is monitored from an outside at various points o... | 02/15/2000 |
| 5906671 | Method for extraction of metals and non-metals from minerals, industrial by-products and waste materials A method for separation and recovery of metals and metal oxides from industrial minerals and waste materials containing zinc, lead, cadmium, arsenic, iron, mercury and selenium. The metals and metal oxides in dust form are mixed with a reducing agent and ... | 05/25/1999 |
| 5897688 | Method of removing a metal from a stream of hot gas The present invention relates to a method of removing a metal from a stream of hot gas, wherein a particulate material comprising calcium and aluminum-silicate is contacted in the hot gas to absorb metal present in the hot gas. According to the invention,... | 04/27/1999 |
| 5683488 | Method for producing an iron feedstock from industrial furnace waste streams A method for the recovery of iron products, specifically direct reduced iron and iron oxide suitable for use as the feedstock for steel mills, from industrial waste streams containing iron, by treating the waste streams with an ammonium chloride leaching ... | 11/04/1997 |
| 5667553 | Methods for recycling electric arc furnace dust A method for the separation and recovery of metals selected from the group consisting of iron, cadmium, zinc, and lead, from raw material comprising a mixture of metals, which comprises the steps of heating the raw material to a temperature sufficient to ... | 09/16/1997 |
| 5538532 | Methods for recycling electric arc furnace dust A method for the separation and recovery of metals selected from the group consisting of iron, cadmium, zinc, and lead, from raw material comprising a mixture of metals, which comprises the steps of heating the raw material to a temperature sufficient to ... | 07/23/1996 |
| 5474592 | Method of reprocessing metallurgical residues, which contain zinc and lead Residual metallurgical materials which contain zinc and lead are reprocessed by a thermal treatment in a circulating fluidized bed. The required heat is generated in that solid carbon is combusted in the fluidized bed reactor of the circulating fluidized ... | 12/12/1995 |
| 5348713 | Recovery of metal values from zinc plant residues A process is disclosed for recovering zinc, lead, copper and precious metals from zinc plant residue, said process comprising leaching the residue with return zinc spent electrolyte, neutralizing residual acid and reducing ferric iron in the solution by a... | 09/20/1994 |
| 5279643 | Process for recovering valuable metals from an iron dust A process for recovering valuable metals from an iron dust using a shaft furnace is disclosed. The iron dust is agglomerated and supplied into a the shaft furnace together with a lump coke and a flux. Valuable metal oxides contained in the iron dust are r... | 01/18/1994 |
| 5178667 | Dry process for refining zinc sulfide concentrates A pyrometallurgical refining process for obtaining one or both of zinc and lead from a sulfide concentrate, in which an iron-silicate slag or iron-silicate slag containing lime is formed and the sulfide concentrate, incombustible materials, and flux, toge... | 01/12/1993 |
| 5162107 | Method of reprocessing zinc- and lead-containing residues from metallurgical plants by means of a circulating fluidized bed system A zinc- and lead-containing residue from a metallurgical plant is reprocessed by a thermal treatment in a circulating fluidized bed system. A major part of the heat demand is satisfied by a combustion of solid carbonaceous material in the fluidized bed re... | 11/10/1992 |
| 5108496 | Method for the concentration of dusts in a cupola furnace with metal particles A process for the econimic recovery of metallic fractions generated during operation of a cupola furnace comprises the steps of the separating filter dust containing metal fractions from an off-gas stream and recirculating the metal fraction back to the c... | 04/28/1992 |
| 5013532 | Method for recycling electric arc furnace dust This invention relates to the metallurgy of iron and particularly to the separation and recovery of metals from electric arc furnace (EAF) dusts. While the invention discloses a process for the separation and recovery applicable to zinc, lead, cadmium and... | 05/07/1991 |
| 4917725 | Process for treating electric furnace dust A process for treating electric furnace dust comprising mixing electric furnace dust and a reducing agent with a material for reducing the slag melting point, preheating the mixture, adding the preheated mixture to molten slag which is being subjected to ... | 04/17/1990 |
| 4889702 | Process for removing metallic constituents from dust obtained during the electrothermal production of yellow phosphorus Metallic constituents, especially heavy metal constituents are removed from dust electrostatically separated from a gas mixture consisting substantially of carbon monoxide and phosphorus in vapor form obtained during the electrothermal production of yello... | 12/26/1989 |
| 4800069 | Zinc recovery from furnace dust Zinc and other metals are recovered form strongly bound zinc ferrite compounds in furnace dust. To the dust is added 1 weight percent of free zinc oxide unless already present. The dust is treated for 1 hour at 750C with a 20:1 air:chlorine mixture whereb... | 01/24/1989 |
| 4765829 | Treating lead- and zinc-containing steelmaking byproducts According to the instant invention fine and very fine granular zinc- and lead-containing oxidic byproducts are mixed with thermally inert additives and are hot briquetted with caking coal as a binder at a temperature of 490°&#b1;40° C. using sufficient ... | 08/23/1988 |
| 4493732 | Method for implementing pyro-metallurgical processes A method and apparatus for implementing pyro-metallurgical processes, such as those involved in the reaction melting of fine grained solids or for the after-treatment of melts wherein an exothermically reacting solids/gas mixture is conducted through an a... | 01/15/1985 |
| 4396424 | Method for recovering useful metals from dust discharged from metal refining metallurgical furnace In a method for recovering zinc and lead from a dust containing ferric oxide, zinc oxide and lead oxide discharged from a metal refining metallurgical furnace, the dust is charged into the entry of a rotary kiln together with a granular carbonaceous reduc... | 08/02/1983 |
| 4086084 | Refining of metals This invention relates to refining platinum group metal concentrates and the separation therefrom of silver and of the majority of base metals with which they naturally occur. In more detail the process comprises the steps of: (a) contacting a solid parti... | 04/25/1978 |
| 3998926 | Treatment of material with hydrogen chloride This invention relates to refining platinum group metal concentrates and the separation therefrom of silver and of the majority of base metals which are present with them. In more detail, the process comprises reacting together gaseous hydrogen and chlori... | 12/21/1976 |
