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| Number | Title | Issue Date |
| 7348577 | Method for controlling a vaporizer of ion implantation equipment during indium implantation process Disclosed is a method for controlling a vaporizer in ion implantation equipment during indium implantation process. The method comprises the steps of: (a) injecting a solid indium trichloride in a vaporizer; (b) raising a vaporizer temperature up to a first temperat... | 03/25/2008 |
| 6497744 | Apparatus and method for generating indium ion beam An ion source 2 has a heating furnace 4 for annealing a solid material 6 to generate a steam 8 and a plasma generator 16 for ionizing the steam 8 to generate a plasma 24. The ion source 2 is for generating ion beam. An indium trifluoride is used as said s... | 12/24/2002 |
| 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 |
| 6004433 | Purification of electronic specialty gases by vapor phase transfilling A method for purifying liquefied corrosive gases of metallic impurities is described. The principle for this purification method relies on vapor-phase transfilling the vapor phase from a source container into a receiving container. This method has been ob... | 12/21/1999 |
| 5997607 | Process of condensing metal in condensation chamber A condensation chamber and method for condensing a metal connate from a metal rich gaseous mixture. The condensation chamber includes top and sidewall surfaces that together define a central bore. A gas supply is received in the bore, and as the gas begin... | 12/07/1999 |
| 5972065 | Purification of tantalum by plasma arc melting Purification of tantalum by plasma arc melting. The level of oxygen and carbon impurities in tantalum was reduced by plasma arc melting the tantalum using a flowing plasma gas generated from a gas mixture of helium and hydrogen. The flowing plasma gases o... | 10/26/1999 |
| 5733356 | Method and device for processing free-flowing materials A method and apparatus for processing a contaminated free-flowing material and, in particular, filter dust from industrial metallurgical waste and domestic waste incineration plants are disclosed. In order to ensure that the end product of the plant can b... | 03/31/1998 |
| 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 |
| 5348703 | Vapor deposition apparatus and method Apparatus for the physical vapor deposition of an alloy whose constituent ements have widely differing vapor pressures comprises an inner evaporation crucible (1) surrounded by a second evaporation crucible (2) having an array of nozzles (9) angled toward... | 09/20/1994 |
| 5084265 | Process for preparing a thin film of superconducting compound oxide A process for preparing a superconducting thin film of a compound oxide by a process which is similar to MBE technique. In the present process, a plurality of atom beams or molecular beams each contains one element selected from constituent elements of th... | 01/28/1992 |
| 5021084 | Process for improving high-temperature alloys This invention is the electron beam evaporation and deposition(EBED) process which produces high purity and ultrafine grain size in high-temperature and reactive metal alloys. These properties are important in metals used in aircraft gas turbine component... | 06/04/1991 |
| 5004496 | Method and apparatus for treatment of dust recovered from off gases in metallurgical processes The method for treating the dust entails the following steps: (a) supplying a combination of dust, a reducing agent and flux to a gastight electrothermic smelting furnace, (b) smelting, reducing and volatilizing certain metals in the smelting furnace, (c) tapp... | 04/02/1991 |
| 4738716 | Process for purifying lithium The invention relates to a process for purifying lithium in which the lithium is melted in an inert atmosphere. The molten lithium is then maintained at a temperature of 400° to 700° C. under a pressure of less than 10 Pascal while agitating the molten ... | 04/19/1988 |
| 4725307 | Method of treating dust and sludge simultaneously with steel slag A method of modifying dust and sludge simultaneously with steel slag produced in a steel making process. In a reactor equipped with a heating electrode, a predetermined amount of a hydrous silicate mineral as a modifier is fed to molten steel slag having ... | 02/16/1988 |
| 4708190 | Treating metals and/or metallic compounds Metals and/or metallic compounds are condensed from a vapor in a reaction vessel into a condenser, the condensate initially solidifying to block an outlet at the bottom of condenser; subsequent operation of heating stages from the top to the bottom of the... | 11/24/1987 |
| 4548670 | Silicon melting and evaporation method for high purity applications A high-purity method of forming a silicon melt utilizes a solid silicon body which is drilled to provide bores into which electrodes are inserted. The electrodes preferably are also of silicon and an electric arc-current is passed through the electrodes t... | 10/22/1985 |
| 4518418 | Electron beam refinement of metals, particularly copper It has been discovered that suprisingly effective removal of impurities from copper can be achieved using electron beam distillation, especially with respect to relatively low amounts of impurities such as Ag, Se, Te, S, Bi and Pb. Certain pretreatments o... | 05/21/1985 |
| 4488902 | Horizontal, multistage electron beam refinement of metals with recycle A multistage method of refining a metal containing at least two metallic components in at least two sequential metal vaporization stages substantially horizontally arranged and each having a metal feed thereto, comprises, in each stage, irradiating the me... | 12/18/1984 |
| 4488905 | Method of recovering volatile metals from material containing metal oxides A method of reducing and recovering volatile metal from metal oxides comprising the steps of injecting metal oxide-containing material into a shaft reactor, simultaneously injecting reducing agent into said reactor, continuously maintaining said reactor s... | 12/18/1984 |
| 4465512 | Procedure for producing lead bullion from sulphide concentrate A procedure based on suspension smelting has been developed for producing lead bullion from sulphidic concentrates in which the proportion of iron and of slag-forming substances is low. In the procedure oxygen or oxygen-enriched air is used. The slag cont... | 08/14/1984 |
| 4441920 | Method for the thermal production of metals A method and apparatus for the continuous production of metals and/or carbides by thermal reduction is described. In the process, a mixture of metal oxide and carbon is agglomerated, each piece of agglomerate encased in carbon and/or graphite, the carbon ... | 04/10/1984 |
| 4439232 | Samarium metal production In a method for the production of samarium metal byreducing samarium oxide in a container with rare earth metal, vaporizing reduced samarium, and condensing a metal product, the container for the samarium oxide and rare earth metal is lined on its inner s... | 03/27/1984 |
| 4431443 | Methods of vacuum arc melting A method is provided for substantially eliminating metal condensates on the walls of a vacuum arc melting vessel above a molten metal pool by the step of providing an atmosphere of non-condensible gas in the vessel above the molten metal pool during the m... | 02/14/1984 |
| 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 |
| 4326884 | Process for obtaining metal values from ores containing such metals as oxides or convertible into such oxides The invention relates to a process for obtaining metal values from ores containing such metals as oxides or convertible into such oxides, the process comprises grinding an ore at room temperature; reducing said ground ore with reducing agents to a gaseous... | 04/27/1982 |
| 4297132 | Electroslag remelting method and flux composition An improved method is disclosed for electroslag remelting an electrode of an alloy containing at least one oxide forming ingredient, including melting such electrode in a novel flux composition containing about 1-35% boron oxide, by weight.... | 10/27/1981 |
| 4268306 | Process for removing mercury from solid waste material The invention provides apparatus and a process for removing mercury from solid waste material. The solid waste material is placed in a vacuum chamber. The chamber is heated above the vaporization temperature of mercury. A vacuum condition is formed and th... | 05/19/1981 |
| 4246022 | Processing metal chlorides Metal may be recovered from metal chlorides, for example a mixed metal chloride residue from the fluidized bed chlorination of a titaniferous ore in the presence of carbon to produce titanium tetrachloride by heating, in the presence of a scavenging agent... | 01/20/1981 |
| 4168156 | Method of and electric furnace for processing nonferrous molten slags A method comprising the steps of supplying a carbonaceous reducer in a layer onto the surface of molten slag and feeding an oxygen-free gas into said slag in an amount and at a rate ensuring recirculation of said slag with its outflow onto the surface of ... | 09/18/1979 |
| 4162915 | Process for treating lead-copper-sulphur charges Lead-copper-sulphur charges (e.g., ores and concentrates) containing at least one of the elements Fe, Ag, Bi, Zn and Sn are treated pyrometallurgically to recover their metal values by a process comprising the steps of (a) smelting the charge to produce a... | 07/31/1979 |
| 4150248 | Arc heater with silicon lined reactor An arc heater system for producing high purity silicon characterized by the use of an arc heater into which a silicon halide is injected together with a liquid metal reductant, such as an alkali metal, which are reacted together by projecting them into a ... | 04/17/1979 |
| 4147534 | Method for obtaining Mg and Ca through carbon reduction The invention provides methods and apparatus for the production of Mg and Ca through a carbon reduction of their oxides, wherein Mg (or Ca) and CO co-existing in the mixed gas produced from said carbon reduction are kept safe from their reaction into MgO ... | 04/03/1979 |
| 4146389 | Thermal reduction process of aluminium The thermal reduction process for producing metals such as aluminum in a reactor utilizes a dispersed discharge to provide the heat of reaction within the reaction zone in the presence of aluminum vapor to maintain the temperature in excess of 2000° C. T... | 03/27/1979 |
| 4135912 | Electric smelting of lead sulphate residues A process for treatment of lead residues, without prior sintering, in which residues more than 70% of the lead is present as lead sulphates, comprising addition of the said residues, together with a reductant containing carbon and together with fluxes tha... | 01/23/1979 |
| 4118220 | Method for treating waste material Method and apparatus for treating waste material in a counterflow furnace wherein the material is introduced at one end thereof and the processed material is discharged from the other end, while air is simultaneously introduced thereto and the gases of co... | 10/03/1978 |
| 4072503 | Thermal treatment of leaching residue from hydrometallurgical zinc production Pyrometallurgical process for recovering lead, zinc and precious metals from leaching residues and precipitates occuring during the hydrometallurgical production of zinc, comprising a weak oxydizing and reducing treatment of the starting material.... | 02/07/1978 |
| 3948640 | Method of carrying out heat-requiring chemical and/or physical processes A bed of coke or other material having a resistivity within the range of between 10.sup.-4 and 10 ohm m is heated in a reaction chamber by means of an induction coil surrounding said chamber. The heat is generated in the bed itself by passing t... | 04/06/1976 |
| 3938988 | Method for producing aluminum metal from its salts Aluminum metal in the gaseous state may be produced by breaking down of its salts at temperatures of at least 2500° to 5500°C. These very high temperatures may be reached in various ways, e.g., by producing a thermal plasma by means of a plasma arc or a... | 02/17/1976 |
| 3933473 | Method for recovering a usable alloy from titanium scrap A method for recovering a usable alloy consisting of 2.5 - 3.5% aluminum, 1.7 - 2.50% tin and balance titanium from titanium scrap is disclosed. The method comprises cleaning the scrap, charging the cleaned scrap into an electron beam furnace and refining... | 01/20/1976 |
