Gautschi Electro-fours Sa

Klockner-humboldt-deutz Ag

Bfi Betriebsforschungsinstitut, Vdeh-institut Fur Angewandte Forschung

Franz Engelberg

Gerhard Villinger

Rudolf Pflanz

Bernd Onderka

Wolfgang Bender

Martin Wicker

Robert Schneider

Hans-Otto Jochem

Walter Truninger

Luciano Fabris

Richard Breisinger

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

In the heat treatment of heat treatable material in an industrial furnace, in particular for the annealing of annealable material such as, for example, aluminum strip wound into a coil (1), by means of blowing of the annealable material with hot gas jets (8) issuing from nozzles (7), in order to insure a very good and uniform heat transfer from the hot gas stream to the material and a completely uniform temperature distribution in the coil (1), and also the rapid heating thereof, without any need to fear locally partial overtemperatures in the coil, it is proposed in accordance with the invention to move the annealable material such as, for example, the coil (1), and the hot gas jets (8) relative to one another, for example by means of the fact that the coil (1) and/or the hot gas nozzles (7) are rotated about the coil axis, so that the blowing impingement points of the hot gas jets (8) move on the blown surface of the annealable material and all desired portions there can be swept in controlled fashion.

Method and device for the heat treatment of heat treatable material in

A crosshead shoe for the sliding transport on rails of a material to be annealed has, for the lateral guiding on the rails, an approximately U-shaped cross section with downwardly projecting legs. Special glide elements are provided on the side of the glide shoe which faces the glide plane, and/or the rail, which glide elements are designed so that as little wear and friction as possible occur during the movement of the crosshead shoes. The glide elements have glide surfaces for this purpose, the side surfaces of which glide surfaces are rounded and/or downwardly inclined, and/or the peripheral edges of which are associated with one another in obtuse angles or have a shape which is at least partially circular. These conditions exist, for example, in glide elements with polygonal or circular surfaces, which can be arranged in one or several rows or in a honeycomb pattern. Since important edges thus extend inclined to the direction of movement and furthermore no break-off-endangered acute edge angle exists, interferences (for example during travel over rail joints) do not act simultaneously onto the entire edge, so that edge break-offs can be substantially avoided. A flow channel is provided between the crosshead shoe and the base of the material being annealed, through which additional hot air is blown against areas of the material shielded from the main stream by the rail and the crosshead shoe.

Conveying device for push-type or continuous-heating furnaces

By means of an electromagnetic stirrer there is produced in the melt within the melt chamber of the melting furnace a turbulent flow or pair of turbulent flows working in opposite directions and each having a substantially vertical turbulent flow axis. By means of this turbulent flow the upwardly floating slag is forced towards the outermost turbulent flow lines or regions and into an auxiliary chamber formed between a slag barricade and the furnace door. The melt can flow back from the auxiliary chamber into the melt chamber. The slag collected in the auxiliary chamber can be removed in predeterminate time intervals from the auxiliary chamber by means of a slag removal sliding or pusher element and disposed in an environmentally protective fashion in a slag container moved into position at the opened furnace door. The slag collected in the auxiliary chamber, upon opening of the furnace door, can be lifted upon a slag palette or platform with the aid of lifting or buoyant bodies above the lower edge of the furnace door opening.

Method and apparatus for the removal of slag from metallic melt bath in

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.

Growing community of inventors

Constance, Germany

Franz Engelberg