Abstract: The present invention relates a flotation reagent for sulfidic ores, containing at least one compound of formula (1), wherein R2, R3, R4, R5, R6 and R7, independent of one another, represent hydrogen or groups containing 1 to 15 carbon atoms or groups containing oxygen or nitrogen, and at least another compound serving as collector and containing at least one sulfur atom that is directly bound to a carbon or phosphorus atom, wherein the carbon or phosphorus atom is directly bound to at least another sulfur atom or an oxygen atom.

Abstract: A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formula where R1, R2 and R3 independently of one another are alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, aryl groups having 6 to 10 carbon atoms, or alkylaryl groups having 7 to 10 carbon atoms. Also disclosed is the process for preparing the above compound.

Abstract: The present invention relates a flotation reagent for sulfidic ores, containing at least one compound of formula (1), wherein R2, R3, R4, R5, R6 and R7, independent of one another, represent hydrogen or groups containing 1 to 15 carbon atoms or groups containing oxygen or nitrogen, and at least another compound serving as collector and containing at least one sulfur atom that is directly bound to a carbon or phosphorus atom, wherein the carbon or phosphorus atom is directly bound to at least another sulfur atom or an oxygen atom.

Abstract: A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formula where R1, R2 and R3 independently of one another are alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, aryl groups having 6 to 10 carbon atoms, or alkylaryl groups having 7 to 10 carbon atoms. Also disclosed is the process for preparing the above compound.

Abstract: A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formula where R1, R2 and R3 independently of one another are alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, aryl groups having 6 to 10 carbon atoms, or alkylaryl groups having 7 to 10 carbon atoms.

Abstract: The present invention relates to a flotation reagent and a process for the flotation of sulfidic ores. The process comprises contacting the sulfidic ores with a combination of thionocarbamates and mercaptobenzothiazoles to improve the flotation of sulfidic ores, particularly the flotation of copper ore when the copper ore is associated with molybdenum and/or gold. The flotation reagent comprises a combination of compounds of formula (1) and formula (2) where R1 and R2 independently of one another are alkyl groups having 1 to 18 carbon atoms, and R3 and R4 independently of one another are hydrogen or C1–C6-alkyl, and M is hydrogen or an alkali metal, and (1) and (2) are in a weight ratio of (1):(2) of 95:5 to 75:25.

Abstract: A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formula where R1, R2 and R3 independently of one another are alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, aryl groups having 6 to 10 carbon atoms, or alkylaryl groups having 7 to 10 carbon atoms.

Abstract: The present invention relates to a flotation reagent and a process for the flotation of sulfidic ores. The process comprises contacting the sulfidic ores with a combination of thionocarbamates and mercaptobenzothiazoles to improve the flotation of sulfidic ores, particularly the flotation of copper ore when the copper ore is associated with molybdenum and/or gold.

Abstract: A gas-turbine engine combustion system has a combustor with a burner head having both pilot gas and pilot liquid-fuel injection arrangements, the pilot gas arrangement comprising an annular gallery communicating with a downstream face of the head and a deflecting arrangement adjacent the gallery for directing the pilot gas-fuel towards a longitudinal axis of the combustor and over a central part of the downstream face. The combustion system is designed so that, during both gas- and liquid-fuel operations, the flame front face is located close to the burner head and, during liquid-fuel operation, air is forced across the downstream face to cool the head. Advantageously, the cooling air is made to replace the pilot gas-fuel in the annular gallery, so that it is deflected, like the gas-fuel, and contacts the central part of the downstream face. The burner head also features main gas and liquid-fuel injection arrangements, these communicating with one or more passageways in a radial swirler attached to the head.

Abstract: A gas-turbine engine combustion system has a combustor with a burner head having both pilot gas and pilot liquid-fuel injection arrangements, the pilot gas arrangement comprising an annular gallery communicating with a downstream face of the head and a deflecting arrangement adjacent the gallery for directing the pilot gas-fuel towards a longitudinal axis of the combustor and over a central part of the downstream face. The combustion system is designed so that, during both gas- and liquid-fuel operations, the flame front face is located close to the burner head and, during liquid-fuel operation, air is forced across the downstream face to cool the head. Advantageously, the cooling air is made to replace the pilot gas-fuel in the annular gallery, so that it is deflected, like the gas-fuel, and contacts the central part of the downstream face. The burner head also features main gas and liquid-fuel injection arrangements, these communicating with one or more passageways in a radial swirler attached to the head.

Abstract: A piercing mandrel or punch, particularly for backward extrusion, is guided by a member which centers the mandrel or punch in the upper die cavity and is coupled thereto until abutting a centering shoulder in the die cavity; the guiding and centering function continues as the mandrel or punch begins and progresses in the cold flow-working process.

Abstract: An axle body is made by extruding a blank for forward extruding a neck portion and backward extruding a hollow shell portion, a transition zone is also produced by forward extrusion; the resulting shell portion is rolled into a nonround cross section, of, possibly, different wall thickness; two such shell portions are welded at their respective ends.