The invention relates to nonferrous metallurgy, in particular to the electrolytic production of aluminum, namely to the devices for feeding electrolytic cells, and can be used to feed alumina, aluminum fluoride, crushed electrolyte to electrolytic cells for producing aluminum. A device for feeding an electrolytic cell for producing aluminum comprises a hopper, a metering chamber with loading windows located around a perimeter of an upper part of the metering chamber above the hopper base, a valve stem with a pneumatic actuator, an upper locking element rigidly fixed to the valve stem at the upper part of the metering chamber, wherein the upper locking element is positioned between upper and lower edges of loading windows, when the stem is in an upper position, and a lower locking element is mounted on an end of the valve stem. According to a first variant of the present invention, the device is characterized in that at least one metering shuttle valve is provided in the upper part of the metering chamber above the upper locking element, and the metering shuttle valve is rigidly fixed to the valve stem so that its upper end in an initial position of the valve stem is located below the upper edge of the loading windows. According to a second variant of the present invention, the device is characterized in that, inside the hopper above the upper locking element, the device comprises at least one circular rib fixed into the upper part of the metering chamber, at least one rib and at least one baffle plate are fixed to the hopper walls so that the material can pass through gaps between plate ends and the walls of the hopper and the metering chamber. The invention provides for the better stability of feeding and may improve processing performance of an electrolytic cell.

The invention relates to nonferrous metallurgy, in particular to the electrolytic production of aluminum, namely to the devices for feeding electrolytic cells, and can be used to feed alumina, aluminum fluoride, crushed electrolyte to electrolytic cells for producing aluminum. A device for feeding an electrolytic cell for producing aluminum comprises a hopper, a metering chamber with loading windows located around a perimeter of an upper part of the metering chamber above the hopper base, a valve stem with a pneumatic actuator, an upper locking element rigidly fixed to the valve stem at the upper part of the metering chamber, wherein the upper locking element is positioned between upper and lower edges of loading windows, when the stem is in an upper position, and a lower locking element is mounted on an end of the valve stem. According to a first variant of the present invention, the device is characterized in that at least one metering shuttle valve is provided in the upper part of the metering chamber above the upper locking element, and the metering shuttle valve is rigidly fixed to the valve stem so that its upper end in an initial position of the valve stem is located below the upper edge of the loading windows. According to a second variant of the present invention, the device is characterized in that, inside the hopper above the upper locking element, the device comprises at least one circular rib fixed into the upper part of the metering chamber, at least one rib and at least one baffle plate are fixed to the hopper walls so that the material can pass through gaps between plate ends and the walls of the hopper and the metering chamber. The invention provides for the better stability of feeding and may improve processing performance of an electrolytic cell.

The application is directed towards methods for purifying an aluminum feedstock material. A method provides: (a) feeding an aluminum feedstock into a cell (b) directing an electric current into an anode through an electrolyte and into a cathode, wherein the anode comprises an elongate vertical anode, and wherein the cathode comprises an elongate vertical cathode, wherein the anode and cathode are configured to extend into the electrolyte zone, such that within the electrolyte zone the anode and cathode are configured with an anode-cathode overlap and an anode-cathode distance; and producing some purified aluminum product from the aluminum feedstock.

The application is directed towards methods for purifying an aluminum feedstock material. A method provides: (a) feeding an aluminum feedstock into a cell (b) directing an electric current into an anode through an electrolyte and into a cathode, wherein the anode comprises an elongate vertical anode, and wherein the cathode comprises an elongate vertical cathode, wherein the anode and cathode are configured to extend into the electrolyte zone, such that within the electrolyte zone the anode and cathode are configured with an anode-cathode overlap and an anode-cathode distance; and producing some purified aluminum product from the aluminum feedstock.

Apparatus for feeding doses of fluidisable materials comprising one upper Intel pipe (1′, 1″), one lower outlet pipe (2′, 2″) and a Pausing (6′,6″). and a fluidising element (5′,5″) for controlling outflow of materials through the outlet pipe (2′, 2″), The apparatus further comprising a control volume constituted by a chamber (3′,3″) between the Intel pipe (1′, 8″) and the outlet pipe (2′,2″) and a fluidising element (4′, 4″) for controlling inflow of materials Into the chamber (3′, 3″). A diverter (7′,7″) la arranged between the Inlet pipe (1′, 8″) and the outlet pipe {2′, 2″) defining said chamber (3′, 3″) between said Inlet pipe (1′,8″) diverter (7′,7″) the housing (6′, 6″) and the fluidising element (5′,5″). The Invention also relates to a method for feeding doses of fluidisable materials by the apparatus.

Apparatus for feeding doses of fluidisable materials comprising one upper Intel pipe (1′, 1″), one lower outlet pipe (2′, 2″) and a Pausing (6′,6″). and a fluidising element (5′,5″) for controlling outflow of materials through the outlet pipe (2′, 2″), The apparatus further comprising a control volume constituted by a chamber (3′,3″) between the Intel pipe (1′, 8″) and the outlet pipe (2′,2″) and a fluidising element (4′, 4″) for controlling inflow of materials Into the chamber (3′, 3″). A diverter (7′,7″) la arranged between the Inlet pipe (1′, 8″) and the outlet pipe {2′, 2″) defining said chamber (3′, 3″) between said Inlet pipe (1′,8″) diverter (7′,7″) the housing (6′, 6″) and the fluidising element (5′,5″). The Invention also relates to a method for feeding doses of fluidisable materials by the apparatus.

Drilling device comprising an actuator comprising an actuator body and a rod bearing at its free end a drill bit, a tubular sheath secured to the actuator body and comprising walls surrounding the drill bit and a lower opening, a system for detecting contact between the drill bit and the electrolyte bath by analysis of an electric signal; the tubular sheath being secured to the actuator body by means of an electrically insulating fastener, and the rod and the drill bit being remote from the walls of the tubular sheath when the drill bit is moved with respect to at least one lower portion of the tubular sheath and below the lower opening.

Drilling device comprising an actuator comprising an actuator body and a rod bearing at its free end a drill bit, a tubular sheath secured to the actuator body and comprising walls surrounding the drill bit and a lower opening, a system for detecting contact between the drill bit and the electrolyte bath by analysis of an electric signal; the tubular sheath being secured to the actuator body by means of an electrically insulating fastener, and the rod and the drill bit being remote from the walls of the tubular sheath when the drill bit is moved with respect to at least one lower portion of the tubular sheath and below the lower opening.

A method and means for application of anode covering material (ACM) in an electrolysis cell for aluminium production where the cell being of Hall-Hroult type with prebaked anodes. The cell contains a cathode pot with a rectangular footprint and a superstructure with a gas collecting hood that lays onto the top of the cathode pot. A floor construction at least substantially surrounds the cell at a level below the top of the cathode pot and ventilation openings provided with grates are arranged in the floor in the close vicinity to the cell. The superstructure's hood is provided with removable lids that are removed for giving access to the cell's anodes through openings. ACM is applied via a feed tube to cover the anodes and the deposit of ACM is supported by a shuttering.

The present disclosure relates to aluminum production, more particularly, to a method of breaking an electrolyte crust in reduction cells of all types. According to a disclosed method for breaking electrolyte crust by means of separation cutting in a reduction cell for production of aluminum, the crust is cut and broken by means of the thermal melting of a crust material with a high-speed high-temperature concentrated flow of thermal plasma jet heat energy, for which a directed thermal plasma jet is generated and moved above the electrolyte crust along a predetermined path, a formed molten material is continuously removed from a zone of the thermal plasma jet impact to create in the electrolyte crust a slit with the thermal plasma jet, wherein the slit is enough for of crust continuous separation cutting and breaking. The technical effect in the addressing the mentioned object, reduction of the amount of broken electrolyte crust, avoiding the formation of electrolyte crust pieces during the breakage process and, consequently, reduction of power consumption for heating-up the covering material consisting of a mixture of alumina and crushed electrolyte used to form an electrolyte crust.