Gautschi Electro-fours Sa

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Bfi Betriebsforschungsinstitut, Vdeh-institut Fur Angewandte Forschung

Gerhard Villinger

Franz Engelberg

Martin Wicker

Wolfgang Bender

Robert Schneider

Walter Truninger

Ing Franz Engelberg

Luciano Fabris

In order to create a regenerative, energy-saving fuel firing for an industrial furnace, particularly for a metal smelting furnace, that can flexibly take all possible time and space operating conditions and demands of the furnace to be heated as well as the thermic conditions of the respectively employed, heat-storing regenerators exactly into consideration, it is inventively proposed that at least two regenerator/burner modules (,) are switchable from burner mode (,) into regenerator mode (,r) (exhaust gas extraction mode) or, respectively, vice versa independently of one another proceeding from the process controller of the industrial furnace (,), namely with employment of reverse valves (,) or reversible ventilators or, respectively, two-stream ventilators.

Regenerator/burner system for heating a fuel-fired industrial furnace

In order to create a regenerative, energy-saving fuel firing for an industrial furnace, particularly for a metal smelting furnace, that can flexibly take all possible time and space operating conditions and demands of the furnace to be heated as well as the thermic conditions of the respectively employed, heat-storing regenerators exactly into consideration, it is inventively proposed that at least two regenerator/burner modules (3) are switchable from burner mode (7) into regenerator mode (7r) (exhaust gas extraction mode) or, respectively, vice versa independently of one another proceeding from the process controller of the industrial furnace (1), namely with employment of reverse valves (11) or reversible ventilators or, respectively, two-stream ventilators.

Method for heating a fuel-fired industrial furnace and

A charge channel opens into a primary melting chamber and comprises a substantially vertically extending first section and a second section which follows the first section and opens substantially tangentially into a cylindrically shaped bottom portion of the primary melting chamber. The charge channel is charged with melting stock by means of a funnel-shaped melting stock infeed. A jet of molten metal is fed into the first section by passage means comprising a pump and a conduit. The jet of molten metal is mixed in this first section with the melting stock which is infed into and passed through the first section in a free-falling movement. The melting stock is enclosed and entrained by the jet of molten metal which is tangentially injected into the melt-containing bottom portion of the primary melting chamber. A turbulent flow is thereby generated in the primary melting chamber and keeps the melting stock in motion during finish melting. The melt is removed via an overflow structure arranged in the primary melting chamber and counter-directed to the turbulent flow therein, along a flow separation lip and through an outfeed channel.

Apparatus for melting a melting stock composed of scrap metal and/or

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Kreuzlingen, Switzerland

Gerhard Villinger