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7262384 |
Reaction vessel and method for synthesizing nanoparticles using cyclonic gas flow
A reaction vessel and a method for efficiently producing and collecting nanoparticles in the reaction vessel using cyclonic gas flow. Gas is injected through an inlet tangentially positioned...
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7169206 |
Battery recycling
Process for the recovery of Co or Ni, comprising the steps of:
preparing a metallurgical charge comprising Fe, slag formers, and a useful load containing either one or both of Co and Ni;...
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7022155 |
Plasma arc reactor for the production of fine powders
A plasma arc reactor and process for producing a powder from a solid feed material, for example aluminium, is provided. The reactor comprises: (a) a first electrode ( 5 ), (b) a second electrode (...
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6824585 |
Low cost high speed titanium and its alloy production
A method for refining a titanium metal containing ore such as rutile or ilmenite or mixtures to produce titanium ingots or titanium alloys and compounds of titanium involves production of titanium...
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6821500 |
Thermal synthesis apparatus and process
An apparatus for thermal conversion of one or more reactants to desired end products includes an insulated reactor chamber having a high temperature heater such as a plasma torch at its inlet end...
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6786950 |
High purity fine metal powders and methods to produce such powder
Methods of producing metal and alloy fine powders having purity in excess of 99.9%, preferably 99.999%, more preferably 99.99999% are discussed. Fine submicron and nanoscale powders discussed...
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6712875 |
Method and apparatus for optimized mixing in a common hearth in plasma furnace
A method and apparatus for optimized mixing in a common hearth in a plasma furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds...
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6689192 |
Method for producing metallic nanoparticles
Method for producing metallic nanoparticles. The method includes generating an aerosol of solid metallic microparticles, generating non-oxidizing plasma with a plasma hot zone at a temperature...
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6592644 |
Sulfidization of sulfide ores for hydrometallurgical extraction of copper and other metals
The invention relates to a method for the extraction of metals from copper sulphide and/or copper iron sulphide ores with microbiological- and chemical-type leaching steps for dissolution of the...
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RE37853 |
Fast quench reactor and method
A fast quench reaction includes a reactor chamber having a high temperature heating means such as a plasma torch at its inlet and a restrictive convergent-divergent nozzle at its outlet end....
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6428600 |
Process for producing spheroidized hard material powder
The spheroidized hard material powders are produced by introducing a finely ground basic mixture of hard material into a thermal, inductively coupled high-frequency plasma so that at the same time...
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6425934 |
Gas generator disposal method and system therefor
A gas generator disposal method capable of disposing of large quantities of gas generators safely, efficiently and without contamination of environments, and a system therefor, the method...
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6409792 |
Process for melting and casting ruthenium-containing or iridium-containing titanium alloys
An improved process for successful and homogeneous incorporation of ruthenium and iridium into titanium and titanium alloy melts, ingots, and castings via traditional melting processes (e.g., VAR...
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6391081 |
Metal purification method and metal refinement method
A metal purification method and a metal refinement method in which metals of high purity can be easily refined and recovered without increasing the size of the purification and refining devices or...
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6379419 |
Method and transferred arc plasma system for production of fine and ultrafine powders
The present invention is concerned with a method for the production of fine and ultrafine powders of various materials such as metals, alloys, ceramics, composites etc., through a transferred arc...
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6377602 |
Method and device to feed premixed gas to tuyeres of electric arc furnaces
Method and device to feed tuyeres in an electric furnace, the tuyeres comprising a central conduit to deliver a comburent gaseous substance and a peripheral conduit to deliver a cooling gaseous...
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6214247 |
Substrate treatment method
Method for removing a portion of the binder phase from the surface of a substrate that is composed of particles of at least a first phase joined together by the binder phase, and wherein the...
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6019812 |
Subatmospheric plasma cold hearth melting process
A plasma cold hearth melting process which provides an ingot of improved properties and including a plasma cold hearth melting furnace operated inside an air-tight chamber containing an inert gas,...
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5994610 |
Method of suppressing thermite reactions in plasma arc waste destruction system
A method of preventing thermite reactions during the high temperature incineration (slag temperature greater than 1200° C.) of waste material streams containing aluminum and iron (steel) by mixing...
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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...
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5942023 |
Process for recovering metals from electric arc furnace (EAF) dust
Heavy metals substantially free from heavy metal chloride contaminants are recovered from electric arc furnace (EAF) dust by bringing the dust into contact with a carbonaceous reductant utilizing a...
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5882374 |
Process for producing foundry iron with an insulated electrode
A submerged arc furnace having a partially insulated electrode produces molten metal such as foundry iron from scrap iron and steel sources where little or no slag is produced. The metal source,...
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5802098 |
Melting vessel with fastening, mounting and tilting devices
A melting vessel plant, in which the melting vessel is a converter vessel, to which a vessel cover with a pipe connection for removing the flue gases is attached. Either an oxygen lance with an...
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5802097 |
Melting method for an electric ARC furnace with alternative sources of energy and relative electric ARC furnace with special burner positioning
Melting method for an electric arc furnace with alternative sources of energy for the melting of iron-based alloys, the electric furnace (10) including tuyeres (13) positioned on the bottom to...
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5788735 |
Process for remediation of lead-contaminated soil and waste battery casings
Lead-contaminated soil and battery casings are remediated using a plasma arc furnace which pyrolyzes the soil and waste battery casings so as to form a vitrified slag and a combustible gas,...
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5782952 |
Method for production of magnesium
A continuous process for the production of elemental magnesium is described. Magnesium is made from magnesium oxide and a light hydrocarbon gas. In the process, a feed stream of the magnesium oxide...
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5772724 |
High purity titanium production process
The present invention provides a method for producing high-purity titanium from titanium sponge obtained by the Kroll process in which a core of the cylindrical lump of titanium sponge obtained...
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5753004 |
Method for refining molten metal and apparatus for same
A method of refining molten metal includes the steps of reduced-pressure-refining molten metal in a heated vessel, adding slag-forming agents into the refined molten metal while keeping the molten...
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5728193 |
Process for recovering metals from iron oxide bearing masses
A process for recovering iron from an iron oxide bearing mass. The process includes forming a bed of lump coke in a vertical shaft furnace, feeding the iron oxide bearing mass and scrap metal onto...
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5700308 |
Method for enhancing reaction rates in metals refining extraction, and recycling operations involving melts containing ionic species such as slags, mattes, fluxes
A method and apparatus for enhancing reaction rates between ionic species such as slags, mattes, fluxes and the like with at least another component such as similar melts, metals, chemical...
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5579705 |
Plasma furnace and a method of operating the same
The flow of waste gas is directed downwardly by means of a refractory guide chute so as to follow the down flow of molten slag at the downstream end of a slag outlet. Thus the sensible heat of the...
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5578108 |
Ultrafine particles of amorphous metal and method for production thereof
Ultrafine amorphous metal particles which combine the properties of ultrafine particles with those of an amorphous alloy and a method for the production thereof are disclosed. The ultrafine...
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5540752 |
Method for recovery of non-ferrous metals from scrap and dross
A process and apparatus are disclosed for recovering a non-ferrous metal, preferably aluminum and aluminum alloys, in molten coherent form from a charge of material to be processed containing the...
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5503655 |
Low cost titanium production
A method for refining metal slag containing TiO 2 to produce titanium compound comprising introducing molten slag into a heat vacuum chamber, whereby the heat and vacuum oxidize the slag. The slag...
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5486675 |
Plasma production of ultra-fine ceramic carbides
An apparatus and method for the synthesis of ultra-free (submicron) ceramic carbides in a thermal plasma torch reactor using primarily silica, boron oxide, titanium dioxide or other oxides as metal...
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5460701 |
Method of making nanostructured materials
A method and system for synthesizing nanocrystalline material. A system includes a chamber, a nonconsumable cathode shielded against chemical reaction by a working gas not including an oxidizing...
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5439498 |
Process and system for the on-site remediation of lead-contaminated soil and waste battery casings
A mobile system for the remediation of a mixture of lead-contaminated soil and waste lead-acid battery casings includes a plasma arc furnace unit having a plasma arc torch which operates at a...
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5421850 |
Method and apparatus for recovery of non-ferrous metals from dross
A method and apparatus for treating non-ferrous metal drosses in order to recover the free metal contained therein. The dross is heated by a plasma torch in a rotary furnace, preferably to a...
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5399832 |
Process and apparatus for using atmospheric-pressure plasma reactions
A grounded electrode and a high-voltage applying electrode, each obtained by covering a metal electrode with a dielectric are housed at least within a reactor apparatus. A rare gas can be...
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5383953 |
Method of producing magnesium vapor at atmospheric pressure
A method of producing magnesium vapor at substantially atmospheric pressure. The method comprises feeding into the reaction zone of a reduction furnace magnesium-oxide containing materials and...
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5368627 |
Treatment of oxide-containing dusts
An arc is drawn between a movable electrode (E) (preferably graphite), and a fixed electrode (7) in a furnace when smelting metal oxides using a plasma. Shielding gas, e.g. N. is introduced into...
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5320666 |
Low pressure contaminant extraction
A process and apparatus for removing volatile contaminants from contaminated ore through exposure to a low pressure environment, thereby volatilizing the contaminants, after sufficient exposure to...
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5282880 |
Low pressure plasma metal extraction
Removing contaminants from a contaminated ore through volatilization in a low pressure environment, subjecting the ore to a plasma and a reactive gas in a low pressure environment to form a...
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5281790 |
Process of immobilizing ashes by vitrification thereof in a plasma reactor
Disclosed is a process for immobilizing ashes by vitrification thereof in a plasma arc reactor, which is very efficient to treat ashes and any other pulverulent residues containing toxic leachable...
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5278384 |
Apparatus and process for the treatment of powder particles for modifying the surface properties of the individual particles
An apparatus for low temperature plasma treatment of powder particles for modifying the surface properties thereof, comprising means for the creation of a low pressure zone and, in association...
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5245627 |
Use of a radiating arc furnace for treating a dross containing a metal in order to recover this metal
A process is disclosed, for treating dross containing a metal such as aluminum, in order to recover this metal, In this process, the dross to be treated is introduced into a rotary or oscillating...
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5244488 |
Direct smelting process with a thermal plasma
The present invention relates to a process for directly smelting ores, metal oxides or the like with a thermal plasma. The direct smelting process of the invention can be practiced easily by simple...
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5206879 |
Destruction process
Chemical waste is burned in oxygen using an electric plasma flame to heat a stream of gas which contains at least 70% by weight oxygen. Liquid waste in fine droplet form is introduced into the gas...
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5201939 |
Method of modifying titanium aluminide composition
A method of altering the composition of an alloy deposited by plasma-spray processing is disclosed. It has been found that the composition of a powder can be altered by selective vaporization of...
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5176938 |
Process for surface treatment of pulverulent material
A process for the surface treatment of individual particles of a pulverulent material to improve the surface properties thereof. The process includes a plasma-generating apparatus for generating a...
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