摘要:
La sonde comporte un support en forme de gaine (16), une série de tuyaux intérieurs (32), (42) maintenus par des entretoises (28) et reliant des orifices répartis le long de la gaine (16) à un dispositif de mesure et de réception des échantillons gazeux à l'extérieur du four, ainsi que des thermocouples (46) disposés au niveau desdits orifices. Pour permettre le remplacement des tuyaux sans démontage de la sonde, lesdits orifices se trouvent dans des gradins prévus dans la gaine (16) alors que les tuyaux intérieurs (32), (42) de prise d'échantillons gazeux et de mesures thermiques sont tous des éléments individuels rectilignes et échangeables logés dans des canaux rectilignes de support et de protection (20), (22), traversant, chacun, la gaine depuis l'extérieur jusqu'au gradin respectif.
摘要:
To obtain a sample of molten metal from a vessel, e.g. for analysis, a refractory block 14 is installed in a wall (11) of the vessel and is traversed by at least one passage (15) temporarily closed by a frangible or dislodgeable closure (20) at the melt end thereof. After filling the vessel with metal, a rigid elongated pipe (21) movable lengthwise in the passage is placed therein, the pipe being operatively connected with a sample mould (22). To obtain a sample, the pipe (21) and mould (22) are advanced forcibly in a forward direction, so that a forward end of the pipe (21) strikes and breaks or dislodges the closure (20). Molten metal then gains access to the pipe (21) and is free to flow along the pipe to enter the mould (22). After leaving sufficient time for the melt in the mould (22) to freeze or become pasty, the mould (22) is removed from the pipe (21) e.g. by a shearing means (48) and the sample is extracted from the mould for evaluation.
摘要:
A sampler for taking samples from a molten metal bath, particularly a molten iron includes a sample chamber assembly having a cover plate and a housing. The housing has first and second openings for an inflow conduit and a gas coupler, respectively. The first face has an analysis zone, a ventilation zone, and a distribution zone. A depth of the analysis zone is 0.5 mm to 1.5 mm. The cover plate and the housing are assembled together to form a sample cavity. The sample chamber assembly chills the molten iron received therein to a solidified white structure metal sample. An analysis surface of the sample lies in a first plane. In a flow direction of the molten iron, there are no increases in width of the sample cavity and a ratio of the length to depth of the sample cavity increases.
摘要:
A continuous emissions monitor for the measurement of vapor phase and particulate-based metals in gas streams such as those at coal-fired utility plants, incinerators and manufacturing facilities, in which a pulsed plasma source (10), utilizing a resonant reentrant microwave cavity (12) which is powered by a microwave generator (34), operates at sub atmospheric pressures (
摘要:
An immersion probe with a variable connection length is configured to compensate for longitudinal and/or radial length variations in an immersion sublance connected to the immersion probe. The immersion probe is characterized by an adjustable portion that changes length upon engagement with a coupling end of an immersion sublance. The immersion probe can have a sensor head. An immersion assembly of the immersion probe connected to an immersion sublance can be used to take measurements or samples of molten metal in a converter furnace.
摘要:
A continuous emissions monitor for the measurement of vapor phase and particulate-based metals in gas streams such as those at coal-fired utility plants, incinerators and manufacturing facilities, in which a pulsed plasma source (10), utilizing a resonant reentrant microwave cavity (12) which is powered by a microwave generator (34), operates at sub atmospheric pressures (
摘要:
A sampler for the hydrogen analysis of molten metal includes a vacuum tubular body having a wall formed from an inorganic refractory material, and provided at one end thereof with a suction end which is melted upon immersion in molten metal to form an opening for the suction of molten material. The tubular body contains an inner tube connected to the suction end, formed from a hydrogen-permeable material and defining a cavity in which the molten metal drawn thereinto through the suction opening can be solidified into a sample having a predetermined shape. The tubular body defines therein a hollow space located contiguous to the inner tube for collecting the hydrogen released from the sample during its solidification. An apparatus for the hydrogen analysis of molten metal, including such a sampler, is also disclosed.
摘要:
An apparatus for generating an aerosol powder from a melt includes an atomization die (110) having an orifice (111) through which the melt (400) passes to create the powder. The orifice is in the size range at and immediately above that which is just sufficient to permit continuous generation of such powder. The die 110 may be included in a high-temperature probe 100 suitable for immersion in the melt, so that accumulated accretions of powder on the walls of the probe may be melted off by heating the probe.
摘要:
A sampler for the hydrogen analysis of molten metal includes a vacuum tubular body having a wall formed from an inorganic refractory material, and provided at one end thereof with a suction end which is melted upon immersion in molten metal to form an opening for the suction of molten material. The tubular body contains an inner tube connected to the suction end, formed from a hydrogen-permeable material and defining a cavity in which the molten metal drawn thereinto through the suction opening can be solidified into a sample having a predetermined shape. The tubular body defines therein a hollow space located contiguous to the inner tube for collecting the hydrogen released from the sample during its solidification. An apparatus for the hydrogen analysis of molten metal, including such a sampler, is also disclosed.