Abstract: A device for arc welding with fusible wire including a device for setting the wire speed and a device for selecting a metal transfer rate type, the device for setting the wire speed being maneuverable by the hands or fingers of an operator. The device for selecting a metal transfer rate type cooperate with the device for setting the wire speed in such a way as to allow the operator to set the wire speed by maneuvering the device for setting the wire speed and to automatically select, on the basis of the wire speed setting, a metal transfer rate type.

Abstract: A device for arc welding with consumable metal wire comprising means (1) for setting a wire speed (Vf) and means (2) for selecting a type of metal transfer regime, the means (1) for setting wire speed (Vf) being manually or digitally operatable by an operator. According to the invention, the means (2) for selecting a type of metal transfer regime interact with the means (1) for setting the wire speed (Vf) so as to allow the operator to set the wire speed (Vf) by operating said means (1) for setting wire speed (Vf) and so as to select automatically, depending on said setting of the wire speed (Vf), a type of metal transfer regime.

Abstract: Process and apparatus for melting raw material in an electric arc furnace using a flame of variable direction, the apparatus comprising a burner and a lance whereby the lance outlet opening and the burner outlet opening are not concentric and are located at a distance from one another, and whereby the lance axis forms an angle with the burner axis in the range from 10° to 40.

Abstract: A jet of gas injected from a lance is fluidically deviated with a gas flowing in either the same or opposite direction as the jet of gas. The gas used to fluidically deviate the jet is the same as or different from the gas in the jet.

Abstract: Process and apparatus for melting raw material in an electric arc furnace using a flame of variable direction, the apparatus comprising a burner and a lance whereby the lance outlet opening and the burner outlet opening are not concentric and are located at a distance from one another, and whereby the lance axis forms an angle with the burner axis in the range from 10° to 40.

Abstract: The invention relates to a method for measuring the quantity of chemical species contained in a high-temperature gas, and especially the quantity of CO and/or CO2 contained in a gas emitted from a metal treating furnace, especially a light-arc furnace (EAF) or a converter (BOF). According to the invention, part of the gas to be analysed is extracted, the temperature of said gas is reduced to at least 300° C., preferably to a temperature that is lower than or equal to 200° C., in such a way as to obtain a at a temperature between 300° C., preferably 200° C., and the ambient temperature, and at least the quantity of CO and/or CO2 said gas is then measured by means of the coherent light signal which is emitted by a laser diode through the gas and is retrieved on emergence from the gas.

Abstract: The invention relates to a method for measuring the quantity of chemical species contained in a high-temperature gas, and especially the quantity of CO and/or CO2 contained in a gas emitted from a metal treating furnace, especially a light-arc furnace (EAF) or a converter (BOF). According to the invention, part of the gas to be analysed is extracted, the temperature of said gas is reduced to at least 300° C., preferably to a temperature that is lower than or equal to 200° C., in such a way as to obtain a gas at a temperature between 300° C., preferably 200° C., and the ambient temperature, and at least the quantity of CO and/or CO2 in said gas is then measured by means of the coherent light signal which is emitted by a laser diode through the gas and is retrieved on emergence from the gas.