Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 6932853 | Mechanical separation of volatile metals at high temperatures A method of operating mechanical separation devices at high temperatures to separate various volatile metals, metal halides and metal oxides to produce high purity materials. ... | 08/23/2005 |
| 6814779 | Process for producing high-purity metals A process for metal purification comprising a first step for heating a feed metal in a feed crucible to generate a vapor of the metal, a second step for directing the vapor into a condensation passageway for vapors, where part of the vapor is condensed to generate a... | 11/09/2004 |
| 6682586 | Assemblies and methods for processing zinc-bearing materials A process for separating and recovering a desired metal as metal oxide from raw material is provided. The process includes placing the raw material and a reductant in a container to form a reducing microclimate within the container. A housing having an ox... | 01/27/2004 |
| 6451086 | Process for thermal treatment of residual materials containing heavy metal and iron oxide A process for thermal treatment of residual materials containing heavy metal and iron oxide, including providing a multiple-hearth furnace having hearths provided one above the other, depositing the residual materials continuously on a top hearth of the h... | 09/17/2002 |
| 6391088 | Method for heat-treating recyclings containing oil and iron oxide Process for thermal treatment of residual materials containing oil and iron oxide in a multiple-hearth furnace, which has several hearths one above the other, the residual materials containing oil and iron oxide being mixed with a solid reducing agent, in... | 05/21/2002 |
| 6383252 | Method for the heat treatment of residues containing heavy metals The invention relates to a method for the heat treatment of residues containing heavy metals, carried out in a multiple-hearth furnace which is divided into three zones, each of which comprises several stacked levels. Said method consists of the following... | 05/07/2002 |
| 6241797 | Process for reducing oxidic slags There is disclosed a process for reducing oxidic slags or combustion residues above a metal bath. The metal bath is formed of an iron alloy containing metals nobler than iron and whose redox potential is adjusted such FeO is reduced to Fe not at all or on... | 06/05/2001 |
| 6159268 | Process for pyrometallurgical processing in a furnace chamber, of metal-containing waste The invention relates to a process for pyrometallurgical processing, in a furnace chamber, of metal-containing waste which may also contain a quantity of organic material. The process involves a reducing gas being blown with high velocity onto the surface... | 12/12/2000 |
| 6132488 | Process of treating waste containing zinc oxide A treating method of recovering zinc in the metal state from a waste containing the zinc in the oxide state, lead, chlorine, fluorine, and water comprising a mixing process 90 of obtaining a to-be-treated mixed material 70 by mixing a steel dust 7 and a r... | 10/17/2000 |
| 6102982 | Method for recovering zinc oxide from dust A method for recovering zinc oxide comprises the steps of: agglomerating a dust; charging the agglomerate to a molten iron in a melting furnace; collecting a dust generated from the melting furnace; recycling a part of the collected dust and recovering an... | 08/15/2000 |
| 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 |
| 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 |
| 5904748 | Production of elementary volatile metals by thermal reduction of their oxides with the aid of another metal Solar process for the production of volatile elemental zinc, sodium, and potassium by reacting their oxides with a reducing metallic agent selected from Fe, Sn, Ni, Co and Mn, and in a second step, reacting carbon or hydrogen with the oxide of said reduci... | 05/18/1999 |
| 5871561 | Method of treating dusts containing oxides Dusts containing zinc and/or lead in the form of oxides and one or more reducing agents are mixed with each other before or after being introduced into a heat treatment furnace. The mixture is heated to a given temperature range under a substantial vacuum... | 02/16/1999 |
| 5776226 | Method for working up refuse or metal-oxide-containing refuse incineration residues A method for working up refuse or metal-oxide-containing refuse incineration residues or metallurgical residues includes an at least partial oxidation in a meltdown oxidizing reactor followed by a two-stage reduction. The first reduction stage is effected... | 07/07/1998 |
| 5567225 | Method of making pig iron with zinc recovery A method making pig iron employs an in-bath direct reduction performed in a metallurgical vessel which has above it a melting cyclone in which iron-oxide-containing material fed thereinto is pre-reduced by hot reducing gas coming from the vessel. Molten m... | 10/22/1996 |
| 5540751 | Method for recovering zinc from zinc containing dust A method for recovering zinc from zinc comprising the steps of: producing agglomerates containing carbon from dust which contains zinc in a form of zinc oxides; charging the agglomerates into molten metal, the zinc oxides in the agglomerates being reduced and ... | 07/30/1996 |
| 5443614 | Direct smelting or zinc concentrates and residues The present invention is concerned with a process for the direct smelting of zinc containing materials. The process includes volatilizing zinc from zinc-containing materials into a gas phase, while sulphur is fixed as iron sulphide in a Fe-S-O matte. Ther... | 08/22/1995 |
| 5403380 | Method for producing easily volatile metals, such as zinc, lead, mercury and cadmium, of sulfidic raw materials The invention relates to a method for producing zinc, cadmium, lead and other easily volatile metals from sulfidic raw materials in a pyrometallurgical process. In the method, zinc sulfide concentrate is fed into molten copper in atmospheric conditions, a... | 04/04/1995 |
| 5387275 | Process for extracting zinc present in liquid cast iron, means for the implementation of the process, and products thus obtained The invention relates to the field of metallurgy and to a method and a device for the extraction of zinc in solution in a liquid iron bath (2) held in a container (3), such as a crucible for the casting of foundry parts. It is characterized in that, befor... | 02/07/1995 |
| 5364447 | Method of recycling hazardous waste A smelting process for blending hazardous and non-hazardous inorganic industrial wastes with carbon or aluminum reducing agents to simultaneously recover metal alloys (reducible metals), metal oxides (volatile reducible metals), carbon dioxide and man-mad... | 11/15/1994 |
| 5198020 | Removal of zinc from phosphating process sludges Disclosed is a process of removing zinc from a phosphating process sludge wherein the phosphating process sludge is mixed with an additive adapted to form slaglike compounds of iron, calcium and/or barium with the phosphorus component of the phosphating p... | 03/30/1993 |
| 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 |
| 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 |
| 4895595 | Direct smelting process for non-ferrous metal sulfide ores Smelting is effected in a reactor containing juxtaposed oxidizing and reducing zones. The slag baths in the two zones communicate with each other. The slag baths of the two zones communicate with each other, the materials are charged into the slag bath in... | 01/23/1990 |
| 4820340 | Method for slag fuming and reduction The slag fuming process for the recovery of metal values from a slag from the smelting of non-ferrous metal concentrates is carried out more efficiently with lower quantities of fuel-reductant by injecting a portion of the fuel/reductant through one or mo... | 04/11/1989 |
| 4639269 | Method and apparatus for the reducing treatment of molten metals and/or slags thereof A method and apparatus for reducing molten metals and/or slags thereof which involves top-blowing at least one reduction gas stream wherein fine grained coal or coke particles and injected for covering the surface of the molten metal beyond the blow impre... | 01/27/1987 |
| 4612041 | Process for recovering valuable metals from an iron dust containing a higher content of zinc A process for recovering valuable metals from an iron dust with a high concentration of zinc comprising (1) pelletizing said dust into a pellet in a pelletizer, (2) preheating the resulting pellets by charging a hot gas to remove water, the loss on igniti... | 09/16/1986 |
| 4514221 | Method of smelting zinc by injection smelting A method of recovering metallic zinc is disclosed, wherein zinc calcine is introduced to a smelter together with oxygen-enriched air and pulverized coke or coal as reducing agents. The smelter contains two layers, i.e. an upper layer of slag containing th... | 04/30/1985 |
| 4491470 | Method for separating non-ferrous metals from ferruginous secondary substances A method for separating non-ferrous metals from ferruginous secondary substances such as residues and slurries from blast furnaces, steel mills, rolling mills, and the like. In accordance with the invention, a layer of the secondary substances is combined... | 01/01/1985 |
| 4488904 | Method and apparatus for retrieving metallic vapor in the liquid phase using pool of molten retrieving metal A mixture gas containing metallic vapor with oxidizing gas produced by reducing of the oxide of the metal at high temperature is led, at a high enough temperature and a low enough pressure for the reverse oxidization reaction between them to not substanti... | 12/18/1984 |
| 4428771 | Process for the separation of metals from a gaseous mixture formed during reduction Metal is separated from a gaseous mixture formed during reduction of a compound and which contains metal vapour by contacting the compound with an absorbent capable of absorbing the metal vapour and under thermodynamic conditions such that the metal vapou... | 01/31/1984 |
| 4396423 | Process for recovering iron and zinc from steel making dusts The object of the invention is to provide a process for the recovery of iron and zinc from steel making flue dust. The process comprises subjecting the flue dust to a carbiding step in a fluid bed in the presence of a reducing agent and a carbon supplying agen... | 08/02/1983 |
| 4384886 | Process for zinc removal from oxide-containing iron sources For removing zinc from oxide-containing iron sources, the iron source is in form of lump having a minimum grain size of 5 mm supplied together with lumpy reducing agents to a shaft-like muffle furnace being adapted to be gas-tightly closed. The muffle fur... | 05/24/1983 |
| 4382915 | Quenching of ZnO-char gasification In the gasification of char with zinc oxide improvement comprises the process of quenching the reactor effluent with recycled, cold CO product gas, thereby reducing the tendency for zinc vapor to react with any CO2 present to form blue powder.... | 05/10/1983 |
| 4372780 | Process for recovery of metals contained in plombiferous and/or zinciferous oxide compounds Process for recovery of zinc and lead contained in oxidized zinc and lead compounds characterized by the facts that, after drying, the compound is injected into a pig iron bath and the gasses released are condensed, allowing lead and zinc to be recovered ... | 02/08/1983 |
| 4334918 | Method of recovering non-ferrous metals from their sulphide ores A method of recovering non-ferrous metals from their ores comprises introducing the ore into a molten sulphide carrier that is forcibly circulated through an extraction circuit, contacting the molten carrier containing the dissolved or melted ore with oxy... | 06/15/1982 |
| 4132764 | Production of carbon monoxide from carbonaceous material and zinc oxide A carbon source and zinc oxide are reacted in a reactor to form a gas consisting essentially of carbon monoxide and zinc; the zinc is separated from the gas and reoxidized in indirect heat exchange relationship with the reaction mixture of the carbon sour... | 01/02/1979 |
| 4115524 | Production of carbon monoxide A carbon monoxide- and zinc-containing gas is produced by the endothermic reaction of a carbonaceous material with zinc oxide. Zinc separated from the gas is in part reoxidized with air and in part reoxidized with H2 O to form zinc oxide both i... | 09/19/1978 |
| 4112058 | Production of carbon monoxide from carbonaceous material and zinc oxide A carbon source and zinc oxide are reacted in a reactor to form a gas consisting essentially of carbon monoxide and zinc. The zinc is separated and reoxidized in a zinc oxidizer. In the reactor and the zinc oxidizer, heat exchange means are provided for t... | 09/05/1978 |
