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WO/1995/004836A1 |
A method for forming a wrought product from a starting metal (5) such as tantalum, niobium, and alloys thereof. A consumable electrode is coated with at least a first alloy layer (40) by means which provide for uniform thickness. Suffici...
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WO/1995/002707A1 |
There is provided an improved method for dispersing a treatment media in a body of molten metal using an impeller (6) to disperse the media in the body of molten metal (8), the method producing increased shear forces in the body of molte...
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WO/1994/026942A1 |
A method of making an engineering ferrous metal product comprising performing an electroslag remelting operation on a consumable electrode element comprising engineering ferrous metal and in which an ingredient, additional to said consum...
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WO/1994/024320A1 |
Superalloy articles are made more oxidation resistant by a process which includes heat treating the article in the presence of foreign chemical species, at a temperature at which the foreign chemical species reacts with and modifies any ...
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WO/1994/024319A1 |
Superalloy articles are made more oxidation resistant by a process which includes heating the article in an environment having a reduced pressure of inert gas and a low partial pressure of oxygen to a temperature at which the sulfur in t...
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WO/1994/020643A1 |
A snorkel or flow tube apparatus for a metallurgical recirculatory vacuum degassing system comprising at least one up-leg tube (6) and at least one down-leg tube (5) in which the up-leg (6) and the down-leg (5) are arranged generally coa...
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WO/1994/018349A1 |
Molten metal (11) containing suspended liquid particles is passed preferably generally upwardly through a porous media (24) so constructed and arranged such that the movement of the molten metal (11) therethrough renders the suspended li...
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WO/1994/017935A1 |
The invention is characterized by the fact that the non-metallic inclusions (3) are separated by a single or multiple diversion of the metal flow through an angle of at least 90� on the inner surfaces of a ceramic chamber (2) and on ce...
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WO/1994/016122A1 |
A method for electrochemical refining of an impurity-containing melt (50) using a solid electrolyte ionic conductor (64) to remove the impurity from the melt is provided. Also provided are an apparatus (54) for performing the method, and...
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WO/1994/014984A1 |
A vacuum installation, in particular for recycling metallurgy, has at least one ejector in communication with a closed container, into which a metallurgical vessel to be pressurized may be introduced, as well as a second ejector connecte...
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WO/1994/012301A1 |
An apparatus with a filtering zone (28) for filtering molten material, such as a molten metal-ceramic particle mixture, includes a porous cloth filter (50) located so that the mixture must pass through the cloth filter (50), and a mechan...
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WO/1994/011541A1 |
A method of making an engineering ferrous metal comprising the steps of adding to liquid engineering ferrous metal solid alloy carbide particles and thereafter permitting the ferrous metal to solidify. The alloy carbide particles are coa...
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WO/1994/010348A1 |
A process and device are disclosed for melting scrap in a direct current-driven closed shaft furnace. The scrap is fed in a ring area at the furnace end, the hot gases which flow against the falling scrap are sucked below the scrap feedi...
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WO/1994/006586A1 |
Particles of metal alloys and composites have been developed that are particularly suitable for use in producing thixotropic alloys and in the injection molding of such alloys. The particulate material comprises particles of metal alloy ...
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WO/1994/004711A1 |
A furnace (1) has a main holding portion (2) and a charging well (4) into which molten metal from the holding portion is circulated by means of an electromagnetic pump (7). Metal enters the well as a tangential flow and a stationary turb...
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WO/1993/025717A1 |
A process and apparatus for continuously monitoring or detecting a liquid element or compound in another, different liquid includes introducing (120) a gas into a first liquid (112), measuring bubble size of bubble formation of the gas i...
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WO/1993/024665A1 |
A method is disclosed for melting copper without incorporating unwanted oxygen and/or hydrogen into the copper by effectively controlling the burners (16) used to melt the copper within desired fuel/air ratio operating limits by employin...
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WO/1993/019873A2 |
A technique for separating a liquid from heterogeneous constituents therein, comprises the steps of providing a passage for a flow of liquid containing heterogeneous constituents and directing ultrasound waves into the passage in a direc...
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WO/1993/017136A1 |
A process for fluxless melting and refining magnesium or magnesium alloys including sparging an inert gas, such as argon, into a bath of molten magnesium or magnesium alloy sufficient to purify and remove nonmetallic inclusions present i...
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WO/1993/017135A1 |
The invention relates to a method for recovering non-ferrous metal from a dross starting material containing this metal, optionally together with non-ferrous metal scrap, and/or a starting material comprised of such scrap. The method com...
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WO/1993/012902A1 |
A method of skull-melting comprising the steps of providing a vessel (50) for skull-melting with an interior (56) and an underside, and an orifice (52) connecting the interior (56) to and underside. Disposing a waveguide (54) in the orif...
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WO/1993/012261A1 |
In the particular embodiments described in the specification, a vacuum furnace includes a hearth (13) having a melting region (10) and a refining region (19) and a particulate metal supply tube (26) for conveying particulate metal (25) t...
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WO/1993/008936A1 |
A method for removing one or more contaminations from a bulk material, the bulk material being fed to a treating chamber (1), exposed herein to a temperature treatment and discharged. According to the invention the bulk material is expos...
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WO/1993/009255A1 |
The invention concerns a nozzle assembly for introducing fluids into a melt, the nozzle assembly comprising a perforated nozzle brick (3), made of refractory material, which can be inserted in the wall (1) of the melt vessel (2) and whic...
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WO/1993/009258A1 |
The proposed method for electroslag casting of ingots from a granular metal-containing blend provides for creation of a slag bath by means of non-consumable cooled metal electrodes maintaining in the upper layers of the slag bath the tem...
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WO/1993/003879A1 |
A system and method are provided for the non-thermal destruction of hazardous waste material using an electrodeless inductively coupled RF plasma torch (30). The waste material (26, 32) is combined with a controllable source of free elec...
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WO/1993/001321A2 |
The invention relates to a process for demetallising metal-containing residues, shavings, slag and the like occurring in metallurgical and waste metal recovery processes in which the metal/non-metal phase mixture is introduced into a cen...
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WO/1992/013976A1 |
Described are a process and device for recycling articles containing metals or metal vapours, in particular mercury-vapour lamps. The articles are fed into a container containing a liquid which converts the metal or metal vapour into har...
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WO/1992/010595A1 |
Apparatus for bubbling a gas through molten aluminium defines a "U"-shaped flow path. The gas is admitted at the bottom of one leg of the "U" to flow upwardly through descending metal. An immersion heating element (17) is provided in the...
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WO/1992/008814A2 |
A device is described for injecting gas into molten metal, e.g. molten aluminum, in a furnace chamber. It comprises: (a) a stirring apparatus having a reservoir chamber separate from the furnace chamber, a connector portion with an orifi...
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WO/1992/006222A1 |
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 characteri...
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WO/1992/002649A1 |
A ceramic foam filter cartridge (1) having upper and lower surfaces (2, 3) and edges (4, 5) tapering inwardly from the upper surface (2) to the lower surface (3) characterised in that a structure (6, 7, 8, 9) including a reinforcing memb...
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WO/1992/002650A1 |
A method of dispersing a gaseous medium within a body of liquid metal characterised by (1) disposing at least one plate within the body, the plate having at least one part extending in a plane at or near the horizontal; (2) delivering a ...
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WO/1992/001818A1 |
In the particular embodiments described in the specification, a vacuum furnace includes a conveying arrangement for holding four solid metal members (16, 22) with their end faces (18) in closely-spaced relation and an energy beam gun (11...
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WO/1992/001820A1 |
In the representative embodiment described in the specification, an electron beam furnace (10) has an evacuation system (25) which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 mcirons H...
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WO/1991/015604A1 |
This invention relates to the refining of steel external to a primary steelmaking vessel, for example in the ladle. More particularly, it is: A) a method of synthesizing a slag on the steel that (i) mitigates the detrimental effects of e...
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WO/1991/013714A1 |
In a process for manufacturing specially shaped metallic or ceramic bodies, such as sheets, films, membranes, ceramic sanitary ware or the like, a preform or end form is moulded or cast from a free-flowing, anhydrous, skin-forming starti...
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WO/1991/013178A1 |
The present invention provides a method and apparatus (30) for in-line heating of molten metals for supplying continuous casting devices, particularly for use in the continuous casting of non-ferrous metals.
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WO/1991/013182A1 |
A process for the deoxidation of a refractory metal containing minor concentrations of oxygen is disclosed. In this process the refractory metal is contacted with a metallic deoxidant in a dry, inert atmosphere. The metallic deoxidant an...
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WO/1991/013180A1 |
The specification describes a process for producing synthetic rutile from a titaniferous ore or concentrate. The process involves three basic steps which are reduction, removal or iron by leaching or aeration and removal of other impurit...
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WO/1991/000158A1 |
Ingots from the manufacture of deformation processed composites are formed by high energy melting of interspersed metal components at high input pressure, and high rate resolidification, to produce a dispersed structure containing fine p...
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WO/1990/015163A1 |
A closed remelting furnace (1) comprises a vertical axis (A-A), an electrode support bar (15) for a melting electrode (23), a furnace body (29) with a drive for the electrode support bar and several bottom elements (6, 7) each of which c...
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WO/1990/014568A1 |
The invention relates to a process and device for smelting in cupola furnaces run without coke. According to the invention, substances are injected into the space between the smelting grate (4) and the burners (7) located below it which ...
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WO/1990/013382A1 |
A ladle arrangement intended for use when treating a metal melt, in which gas or gas/powder mixture is delivered to the melt (2) which substantially fills the ladle (1), and departing gases are extracted by suction through a hood mounted...
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WO/1990/012895A1 |
The invention provides a gas injector (50) for a molten metal vessel, comprising: a gas inlet chamber (51) having an inlet port and at least one outlet port (54), each said outlet port (54) having secured gas-tightly thereto an extruded ...
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WO/1990/011379A1 |
The method provides for melting the scrap of aluminium and of its alloys by passing through the melt an alternating current of 2.103 to 12.103 A and of a voltage of 2 to 11 V and for simultaneously applying to the melt a magnetic field o...
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WO/1990/010087A1 |
The invention concerns a process for handling metals, in particular steel, in a vacuum, in which molten metal is contained in a vessel (30) for in vacuo handling which is tightly sealed by a lid (20). To obtain a process and a device for...
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WO/1990/008843A1 |
This invention relates to a process for the direct smelting of ores, metallic compounds and the like with the use of a heat plasma. This process can be readily conducted with a simple installation irrespective of the shape of the object ...
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WO/1990/004043A2 |
A quantity of titanium (5) is heated in a crucible (1) to provide a melt (5), and a layer of slag (7), containing an ionizable titanium compound, such as titanium dioxide, along with ionizable slag constituents, is disposed on the top of...
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WO/1990/002209A1 |
A process for producing magnesium low in iron comtamination including contacting a magnesium melt with a combination of a zirconium material and a silicon material to reduce the iron contamination without introducing detrimental levels o...
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