Abstract: The invention refers to metallurgy, in particular to making low (LH) and specified (SH) hardenability steels in electric arc, induction furnaces or oxygen converters. A metallurgical unit is loaded with metal charge consisting of iron carbon alloy, scrap with a specified content of manganese, silicon, chrome, nickel and copper, providing for the final content of each of them of not more than 0.
Abstract: A process for recovering non-ferrous metals, in particular copper, nickel and cobalt, from metallurgical residues containing these non-ferrous metals at an oxidation state of greater than or equal to zero, in an alternating current type plasma arc electric furnace comprising a plurality of electrodes, containing a liquid copper heel covered by a fluid slag comprising at least one fusion-reduction phase, comprising charging of metallurgical residues comprising the non-ferrous metals onto the heel contained in the plasma arc electric furnace, fusion of the metallurgical residues in the fluid slag or at the slag-metal bath interface, reduction of at least the non-ferrous metals to oxidation state zero, and intense stirring of the copper heel by injection of inert gas, preferably nitrogen and/or argon, so as to avoid crust formation and to accelerate the reduction reaction and to cause the copper-miscible non-ferrous metals to pass into the copper heel.
Abstract: A method for manufacturing molten iron comprises charging a carbonaceous material, a flux, and solid reduced iron obtained by thermally reducing carbon composite iron oxide agglomerates into an arc melting furnace and melting the solid reduced iron using arc heating in the melting furnace while an inert gas is blown into a molten iron layer from a bottom blowing tuyere on a bottom of the melting furnace, wherein: a carbonaceous material suspending slag layer is formed in an upper portion of a slag layer formed on the molten iron layer when the solid reduced iron is melted into the molten iron; a carbonaceous material coating layer having the carbonaceous material is formed on the carbonaceous material suspending slag layer; and the molten iron and the slag stored in the melting furnace are tapped from a tap hole formed in a lower portion of a furnace wall of the melting furnace.
Abstract: Proposed is a zirconium crucible used for melting an analytical sample in the pretreatment of the analytical sample, wherein the purity of the zirconium crucible is 99.99 wt % or higher. In light of the recent analytical technology demanded of fast and accurate measurement of high purity materials, the present invention provides a zirconium crucible for melting an analytical sample, a method of preparing such analytical sample, and a method of analysis that enables the analysis of high purity materials by inhibiting the inclusion of impurities from the crucible regardless of difference in the analysts and their skill.
Abstract: This invention relates to a single-step pyrometallurgical process for the recovery of non-ferrous metals from zinc bearing residues, in particular from by-products of the zinc and lead industry such as goethite and jarosite. A process for the recovery of metals from industrial Zn residues containing Zn, Fe and S is defined, wherein Zn is fumed, Fe is slagged, and S is oxidized to SO2, characterized in that the Zn fuming, the Fe slagging, and the S oxidation are performed in a single step process, by smelting the residues in a furnace comprising at least one submerged plasma torch generating an oxidizing gas mixture, and by feeding a solid reducing agent to the melt. The process achieves the oxidation of S and the slagging of Fe, while simultaneously achieving the reduction and the fuming of metals such as Zn.
Abstract: The present invention relates to tailored materials, particularly metals and alloys, and methods of making such materials. The new compositions of matter exhibit long-range ordering and unique electronic character.
Abstract: Implantable medical devices made from a single beta phase Tantalum alloy utilizing Titanium as an alloying agent that are biocompatible, radiopaque and visible under x-ray and fluoroscopy, the alloy having mechanical properties that allow it to be machined by conventional, machining methods for forming the devices, and a method for making the alloy. The alloy is between approximately 10 percent and 25 percent Ti by weight and preferably has a density of 12 g/cm3 or greater.
January 7, 2009
November 19, 2009
Pulse Technologies, Inc.
Andrew Fisk, Robert S. Walsh, SR., Francis E. Hanofer, JR., Joseph C. Rosato, JR., Anatolii Demchyshyn, Leonid Kulak, Sergei Firstov, Mykola Kumenko
Abstract: A method of manufacturing high purity hafnium is provided and includes the steps of making aqueous solution of chloride of hafnium, thereafter removing zirconium therefrom via solvent extraction, performing neutralization treatment to obtain hafnium oxide, further performing chlorination to obtain hafnium chloride, obtaining hafnium sponge via reducing said hafnium chloride, and performing electron beam melting to the hafnium sponge in order to obtain a hafnium ingot, as well as a high purity hafnium material obtained thereby and a target and thin film formed from such material. The present invention relates to a high purity hafnium material with reduced zirconium content contained in the hafnium, a target and thin film formed from such material, and the manufacturing method thereof, and provides efficient and stable manufacturing technology, a high purity hafnium material obtained according to such manufacturing technology, and a target and high purity hafnium thin film formed from such material.
Abstract: The invention relates to a method for producing a metal alloy, in which in a vessel at overpressure a certain desired content of an alloying constituent, which is gaseous in its normal state, is fed to said metal alloy. The method is designed such that precise addition by alloying of an alloying constituent which is gaseous per se, to a steel alloy subjected to overpressure in a pressure vessel, is made possible.
May 29, 2002
Date of Patent:
September 14, 2004
VSG Energie - und Schmiedetechnik GmbH
Heinrich Feichtinger, Irina Hucklenbroich, Gerald Stein
Abstract: The invention is directed to a method for operating a steelmaking furnace including the steps of charging steelmaking materials into the steelmaking furnace, blowing oxygen into the steelmaking furnace, discontinuing the oxygen blow when the charged steelmaking materials are reduced to a liquid steel product, determining the temperature of the finished liquid steel product, blowing a nitrogen gas coolant into the steelmaking furnace to reduce the temperature of the finished liquid steel product to an aim tapping temperature, discontinuing the nitrogen gas coolant blow when the finished liquid steel product temperature is lowered to the aim tapping temperature, and tapping the finished liquid steel product at the aim tapping temperature for downstream processing.
Abstract: A metal reduction and melting process which involves the heating of a burden comprising a metal containing component and a carbon containing component in a channel type induction furnace in order to reduce such metal containing component, in which at least part of the gaseous products of the process is utilized for preheating the burden; and apparatus for carrying out such preheating.