Elkem As

Other

Alcoa Inc.

Elkem Asa

Deutsches Zentrum Fur Luft-und Raumfahrt E.v.

Kai Johansen

Jan A Aune

Donald Robert Sadoway

Georg Frommeyer

Karl Forwald

Gunnar Schussler

Jon Brinch

Bjorn Myhre

Gunnar Halvorsen

Per Olav Nos

Elke William Thisted

Gro Soleng

Krister Engvoll

Marianne Engvoll

Oyvind Mikkelsen

Gunnar Schuessler

Oeyvind Mikkelsen

Sadoway Donald

Andreas Sesselmann

Christian Stiewe

Gunnar Schüssler

The present invention relates to high strength, oxidation and wear resistant titanium-silicon base alloy containing:

High strength, oxidation and wear resistant titanium-silicon based alloy

The present invention relates to a method for electrolytic production and refining of metals having a melting point above about 1000&#xb0; C., particularly silicon, where there is provided a first electrolytic cell having an upper molten electrolyte layer of a first electrolyte, a lower molten alloy layer of an alloy of the metal to be refined and at least one metal more noble than the metal to be refined. The lower alloy layer is the cathode in the first cell and an anode is positioned in the upper molten electrolyte layer. A second electrolytic cell is also provided with an upper molten metal layer of the same metal as the metal to be refined, said layer constituting a cathode, a lower molten alloy layer, said lower layer constituting an anode, said alloy having a higher density than the metal to be refined, and an intermediate molten electrolyte layer having a density between the density of the upper and lower molten layers. Both electrolytes are oxide based electrolytes containing oxide of the metal to be refined, and the electrolyte is in molten state and has a melting point below the operating temperature of the process. Raw material comprising an oxide of the metal to be refined is added to the first cell and direct electric current is passed through the anode to the cathode such that the metal to be refined is moved from the anode and deposited in molten state at the cathode. The two cells can be operated in two separate steps. One to produce an alloy and the other to refine metal from the alloy.

Method for electrolytic production and refining of metals

The present invention relates to a dimensionally stable oxygen-evolving anode for use in an electrolytic cell for the production of aluminium. The anode comprises of a container made from an alloy comprising aluminium and at least one metal more noble than aluminium; a fluid bath in the bottom of the container having the ability to dissolve aluminium, said fluid having a density that is higher than the density of molten aluminium at the operating temperature of the cell, a pool of molten aluminium floating on top of the fluid bath in the bottom of the container; a refractory layer arranged on the inner sidewalls of the container at least in the area of the pool of molten aluminium, said refractory layer protecting the molten aluminium from contacting the inner sidewalls of the container.

Anode for electrolysis of aluminum

The electrode arrangement uses vertically oriented electrodes with side wall contacts for an electrothermic smelting furnace for aluminum production. The side wall contacts are radially moveable into the furnace to compensate for wear on the contacts. The side wall contacts can be hollow to allow a slag forming charge to be fed to the furnace.

Electrode arrangement as substitute bottom for an electrothermic slag smelting furnace

The present invention relates to an electrolytic cell for the production of aluminum comprising an anode and an electrolytic tank where the electrolytic tank comprises an outer shell made from steel and carbon blocks in the bottom of the tank forming the cathode of the electrolytic cells. At least a part of the sidewall of the electrolytic tank consists of one or more evaporation cooled panels, and wherein high temperature, heat resistant and heat insulating material is arranged between the evaporation cooled panels and the steel shell. The invention also includes a method for maintaining a crust on the sidewall of the tank and for recovering heat from the cooling medium inside the panel for transformation into electrical energy.

Electrolytic cell for the production of aluminum and a method for maintaining a crust on a sidewall and for recovering electricity

A hollow partition wall is employed to feed carbon material to an underflow of a carbothermic reduction furnace used to make aluminum. The partition wall divides a low temperature reaction zone where aluminum oxide is reacted with carbon to form aluminum carbide and a high temperature reaction zone where the aluminum carbide and remaining aluminum oxide are reacted to form aluminum and carbon monoxide.

Method and reactor for production of aluminum by carbothermic reduction of alumina

The present invention relates to a process for carbothermic production of aluminum where molten bath aluminum carbide and aluminum oxide are produced in a low temperature compartment ( ), and continuously flow into a high temperature compartment ( ) where the aluminum carbide is reacted with alumina to produce a top aluminum layer ( ), where the aluminum layer ( ) forms a layer on the top of a molten slag layer and is tapped from the high temperature compartment ( ) at outlet ( ), and where off-gases from the two compartments are treated in reactors fed by one or more columns ( ). According to the invention the low temperature compartment ( ) and the high temperature compartment ( ) are located in a common reaction vessel ( ) where the low temperature compartment is separated from the high temperature compartment by an underflow partition wall ( ). The present invention also includes precipitating and filtering aluminum carbide from the tapped molten aluminum, followed by degassing and casting to form aluminum shapes such as ingots ( ). The present invention further relates to a reactor for production of aluminum by carbothermic reduction of aluminum.

Growing community of inventors

Kristiansand, Norway

Kai Johansen