Swiss Aluminium Ltd.

Robert Moser

Alfred Steinegger

Hans Friedli

Gottfried Jungblut

Horst Feddern

Fritz Dolder

Device and process for operation of open baking furnaces, in particular such ring-type furnaces for manufacturing anodes for the aluminum electrolytic process, are such that for each so called fire the sealing chamber and/or chamber in the cooling zone can be saved in that the flue gas exhaust manifold is not situated on the headwall but instead on the flue and/or the opening of that headwall on which the last fresh air supply manifold is situated is closed off by a sliding baffle. Openings corresponding in cross section to that of the connected part of the flue gas exhaust manifold are provided in the region of the flues. The advantage of the process lies in the greater flexibility in furnace operation, which results either in an increase in production or an increase in product quality.

Device and process for operating an open baking furnace for

A sleeve or collar for protecting the iron pin of an anode connecting rod set in the carbon anode block used in the electrolytic production of aluminum is made out of aluminum or aluminum alloy sheet. Parts of at least two facing sides of the rectangular or square shaped sleeve project inwards in such a manner that they clamp onto the iron anode pin.

Protective electrode sleeve

A metal melt is filtered by causing the melt to flow successively into a filter chamber, downwards through the filter chamber, into a riser chamber, upwards through the riser chamber, and out of the riser chamber, and simultaneously introducing a counter-current flow of gas into the filter chamber, while the filter chamber contains a loose bed of granulate, whereas in the riser chamber there is no granulate nor is gas introduced therein.

Apparatus for filtering metal melts

A vessel which, when in use, is subject to thermal stress, and which includes a device for introduction of gas through the wall of the vessel, the device comprising a metal sleeve fastened to the outer face of the wall of the vessel in an adjustable and easily exchangeable manner by a combination of screws and spring washers, and a gas-permeable body of fire-resistant material which is mounted adjustably and exchangeably in the metal sleeve under spring pressure. Either a major portion of the gas-permeable body is formed as a frustum of a cone, which has a short cylindrical portion on its end of larger cross section, or the gas-permeable body consists of two cylindrical portions of different cross section. The spring pressure is exerted by at least one dished spring column consisting of a series of pairs of oppositely oriented dished spring washers.

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Steg, Switzerland

Robert Moser