Method for use when galvannealing a steel material (1), in which the material (1), in a first step, is preheated to a first process temperature and is coated with a layer of a liquid alloying metal (3), in a second step is further heated to a second, higher process temperature, and in a third step is kept at the second process temperature during a predetermined time period so that the alloying metal coating at least partially is caused to alloy with the steel material (1). The invention is characterised in that the heating in the second step is caused to be carried out by one or several DFI burners (5).
Method for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding means (11), to be fed to an inlet opening (lla) in a burner device (10), where the burner device (10) is caused to comprise a first inlet (13a) for the oxidant through which an oxidant is caused to flow via a first supply conduit (13). The invention is characterised in that the first inlet (13a) for oxidant is caused to be arranged in the form of a first opening arranged by the inlet opening, through which the oxidant is caused to flow out, through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe and out through the burner orifice (17), and in that water vapour is added to the oxi¬ dant before the oxidant reacts with the fuel.
Device for heating a metal material, comprising an elongated DFI burner device, arranged to be driven with gaseous oxidant and gaseous fuel and to be displaceable and longitudinally arranged with respect to the metal material. The device has supply devices for fuel and oxidant. The burner device comprises longitudinal, tubular vessels for fuel and for oxidant, arranged in parallel to one another and relative to the surface of the metal material. The vessels each have one or more openings arranged along the vessel, through which the fuel and oxidant are arranged to flow out and then converge in an ignition zone outside the respective vessels, where a flame is generated. The respective supply devices are arranged by means of a regulator to keep the pressure constant throughout the vessel in question during operation. Each vessel has a longitudinally displaceable piston for controlling the longitudinal extension of the flame in the longitudinal direction of the vessels.
C21D 11/00 - Process control or regulation for heat treatments
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
A method for the heat treatment of extended steel products such as, for example, rods, pipes, work pieces, etc., while the products are in motion. The invention is characterised in that the products (13, 14, 33, 34, 35) are caused to be heated by means of DFI burners (6-11, 16-20) (where 'DFI' is an abbreviation for 'direct flame impingement'), which burners are caused to be located such that one set of burners (6, 7, 8, 9, 10, 11), (16, 17, 18, 19, 20) essentially covers the circumference of the products, and in that the burners are caused to be located integrated into arrangements (2-4, 13) that transport the product in a direction that is perpendicular to a plane in which the flames of the burners essentially lie.
A DFI (Direct Flame Impingement) burner (1), comprising a metal block (2) and at least two nozzles (3, 4) projecting out from the metal block (2). The invention is characterized in that each of the nozzles (3, 4) comprises a set of nozzle openings comprising at least one fuel opening and at least one oxidant opening, in that the set of openings in each nozzle (3, 4) is identical, comprising corresponding fuel and oxidant openings, in that the metal block (2) comprises only one main fuel inlet (5) and only one main oxidant inlet (6), in that the main oxidant inlet (6) is connected to at least one main oxidant chamber (8a, 8b), connected to at least one oxidant opening in the set of openings in each nozzle (3, 4) via apertures of iden- tical length and cross section, and in that the main fuel inlet (5) is connected to at least one main fuel chamber (7), connected to at least one fuel opening in the set of openings in each nozzle (3, 4) via apertures of identical length and cross section, whereby the gas pressure of fuel or oxidant is equal over all corresponding fuel and oxidant openings in the set of openings in each nozzle (3, 4).
Summary Method for heating metal materials, such as a slab or a billet (3), using at least one DFI burner (1). The invention is characterized in that the heating power of the flame (10) of the DFI burner (1) is pulsated in cycles, so that the heating power is alternated between at least two different, predetermined powers, where each predetermined power, respectively, is maintained during a certain predetermined time period, where some powers are made to be lower than others, in that the powers are made to be low enough, and the time periods are made to be short enough, so that the combination of the powers and their corresponding time periods results in that the surface of the metal slab (3) is not heated above a certain, predetermined limit temperature during the time periods of the higher powers, in that this pulsating heating of the metal material (3) is interrupted when a certain stop condition is fulfilled, and in that the metal material (3) thereafter is heated to another predetermined, final, homogenous temperature by the use of another, conventional heating method.
Method for heating a sheet like material (2) in an industrial furnace to a predetermined temperature profile along the length of (3), and transverse of (4), the material (2). The 5 invention is characterized in that the sheet like material (2) is being transported in a furnace relative to at least one ramp (6) below the material (2) and/or at least one ramp (6) above the material (2), each of the ramps (6) comprising a number of DFI (Direct Flame Impingement) burners (7) lo- 10 cated in a row beside each other, in that the DFI burners (7) are directed towards the sheet like material (2), and in that the individual burners (7) in each ramp (6) are controlled to give a predetermined heating power. 15 The invention also includes an apparatus. fel! talet kan inte representeras i angivet format., 2006-10-17 050174SE
An inhalation mask (1) for administering gas and any pharmaceutical preparation entrained by the gas, to a user, comprising a cup-shaped inner mask part (3) with an edge (4) adapted, in a first use position, to abut against the user's (2) face. The inner mask part (3) is connected by connecting means (5, 6, 7) to a gas inlet (8) and a gas exhaust means (9), adapted to exhaust the exhaled gas, and the mask (1) further comprises an outer mask part (11) which surrounds the inner mask part (3) and substantially extends from the edge (4) away from the user's (2) face and defines a gap (12) between itself and the inner mask part (3). The outer mask part (11) is connected to the gas exhaust means (9) for optionally generating a negative pressure in the gap (12) for exhausting an exhalation gas, and the mask (1) is characterised in that it further comprises a carrier device (13) adapted to be arranged on the user (2) and carry the mask (1) to enable a second use position in which the user's face (2) is substantially released from the inner mask part (3).
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