An aluminum alloy contains at least one additive element selected from the group consisting of Zr, Cu, Cr, and Zn in an amount of 0.010% by mass or more and 8.0% by mass or less, and C in an amount of 0.01% by mass or more and 10.0% by mass or less.

A method for optimizing stability in an electrolysis cell of the Hall-Hroult type where the cell has suspended prebaked anodes and a cathode panel. The panel comprises several cathode blocks or cathode block sections. A metal pad and an electrolytic bath are located between said anodes and the cathode panel. The force field acting on the metal pad is calculated and monitored in a computer based model of the cell, whereby the local current paths and correspondingly the local forces in the metal above the cathode panel are modified by influencing selectively the current distribution in individual cathode blocks or block sections in the computer based model. At least one modification is implemented in the cell. The invention also relates to a correspondingly modified cell.

An insulation assembly is provided, including: a body of an insulating material with a lower surface configured to contact a sidewall an electrolysis cell; an upper surface generally opposed to the lower surface; and a perimetrical sidewall extending between the upper surface and the lower surface to surround the remainder of the body, the perimetrical sidewall including: an inner portion configured to face an anode surface of the electrolysis cell and provide a gap between the body and the anode surface of the electrolysis cell; wherein the body is configured to extend from the sidewall towards the anode surface.

The design of a metal inert anode is proposed, it is made in the form of a perforated structure with through-openings, in particular formed by longitudinal and transverse anode elements intersecting each other and limited by the lateral sides of the intersecting anode elements, and contains vertical or inclined fins that protrude from the bath and are integrated with the anode elements or a current conductor. As a result, it ensures a reduction in the voltage drop in the anode and in the bubble layer under the anode, a reduction in the anode overvoltage and anode consumption, an increase in current efficiency and the reliability of the cryolite-alumina crust, which leads to an increase in the anode service life and promotes the formation of a reliable and durable cryolite-alumina crust above the melt surface, which improves process efficiency.

The design of a metal inert anode is proposed, it is made in the form of a perforated structure with through-openings, in particular formed by longitudinal and transverse anode elements intersecting each other and limited by the lateral sides of the intersecting anode elements, and contains vertical or inclined fins that protrude from the bath and are integrated with the anode elements or a current conductor. As a result, it ensures a reduction in the voltage drop in the anode and in the bubble layer under the anode, a reduction in the anode overvoltage and anode consumption, an increase in current efficiency and the reliability of the cryolite-alumina crust, which leads to an increase in the anode service life and promotes the formation of a reliable and durable cryolite-alumina crust above the melt surface, which improves process efficiency.

The present invention relates to nonferrous metallurgy, in particular to the electrolytic production of aluminum, more particularly to a structure of a cathode assembly of a reduction cell for production of aluminum. A lining of a cathode assembly of an aluminum reduction cell is provided which comprises a thermal insulation layer and a fire-resistant layer consisting of no less than two sub-layers, wherein the porosity of the thermal insulation layer and the fire-resistant layer increases from an upper sub-layer to a bottom sub-layer and the thickness ratio of the fire-resistant layer and the thermal insulation layer is no less than . Also, the present invention provides a method for lining a cathode assembly of a reduction cell and a reduction cell having the claimed cathode assembly lining. The invention is aimed at the reduction of the cyanide content in upper thermal insulation layers and to provision of conditions for material reuse in the thermal insulation layer, waste reduction and improvement of the environmental situation on aluminum production facilities.

The present invention relates to nonferrous metallurgy, in particular to the electrolytic production of aluminum, more particularly to a structure of a cathode assembly of a reduction cell for production of aluminum. A lining of a cathode assembly of an aluminum reduction cell is provided which comprises a thermal insulation layer and a fire-resistant layer consisting of no less than two sub-layers, wherein the porosity of the thermal insulation layer and the fire-resistant layer increases from an upper sub-layer to a bottom sub-layer and the thickness ratio of the fire-resistant layer and the thermal insulation layer is no less than . Also, the present invention provides a method for lining a cathode assembly of a reduction cell and a reduction cell having the claimed cathode assembly lining. The invention is aimed at the reduction of the cyanide content in upper thermal insulation layers and to provision of conditions for material reuse in the thermal insulation layer, waste reduction and improvement of the environmental situation on aluminum production facilities.

The invention relates to production of alloys based on aluminum. A method is proposed for producing aluminum-based alloys by electrolysis, according to which low-consumable anode of aluminum pot is used as a source of alloying elements. At the same time, in order to optimize master alloy consumption, one of the following options is chosen: dissolution of alloying elements from slightly soluble anodes; adding oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot; simultaneous dissolution of alloying elements from slightly soluble anodes with addition of oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot. The method comprises the following stages: introducing alloying elements into molten cathode aluminum by dissolving them in electrolyte melt of aluminum pot from low-consumable anode and/or by adding oxides/and fluorides and/or carbonates of alloying elements into electrolyte melt of aluminum pot; reduction of alloying elements introduced into electrolyte melt of aluminum pot on molten cathode aluminum to form the base for aluminum alloys; determining percentage of elements in the base for aluminum alloys; and bringing alloys to a given composition by adding alloying elements to the base for aluminum alloys in the required amount. The result is multicomponent aluminum alloys of a given composition with introduction of alloying admixtures in the process of aluminum production by electrolysis, and then the alloy is brought to a predetermined composition, providing simplification of technology and control, reducing master alloy consumption which leads to lower cost of aluminum alloy production.

The invention relates to production of alloys based on aluminum. A method is proposed for producing aluminum-based alloys by electrolysis, according to which low-consumable anode of aluminum pot is used as a source of alloying elements. At the same time, in order to optimize master alloy consumption, one of the following options is chosen: dissolution of alloying elements from slightly soluble anodes; adding oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot; simultaneous dissolution of alloying elements from slightly soluble anodes with addition of oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot. The method comprises the following stages: introducing alloying elements into molten cathode aluminum by dissolving them in electrolyte melt of aluminum pot from low-consumable anode and/or by adding oxides/and fluorides and/or carbonates of alloying elements into electrolyte melt of aluminum pot; reduction of alloying elements introduced into electrolyte melt of aluminum pot on molten cathode aluminum to form the base for aluminum alloys; determining percentage of elements in the base for aluminum alloys; and bringing alloys to a given composition by adding alloying elements to the base for aluminum alloys in the required amount. The result is multicomponent aluminum alloys of a given composition with introduction of alloying admixtures in the process of aluminum production by electrolysis, and then the alloy is brought to a predetermined composition, providing simplification of technology and control, reducing master alloy consumption which leads to lower cost of aluminum alloy production.

Method and apparatus for preparing at least one metal chloride from metal oxide containing material comprising calcining the metal oxide containing material under temperature conditions sufficient to obtain a calcined product comprising at least one metal oxide; and selectively chlorinating the calcined product to form at least one metal chloride.