G - Physics – 01 – N
Patent
G - Physics
01
N
73/103, 22/108
G01N 1/10 (2006.01) G01N 1/12 (2006.01) G01N 1/14 (2006.01)
Patent
CA 1039532
ABSTRACT An immersion molten material sampling device of a type usable to obtain a sample of molten steel from a furnace. The device includes a sec- tional mold structure having a vented sample receiving cavity and an entrance passage for molten material to flow into said sample receiving cavity. The entrance passage is characterized by the inclusion of a venturi which minimizes red stance to flow and effects smoother flow of molten material into the sample receiving cavity. The venturi throat which is surrounded by thick wall structure of the mold acts as a thermal valve to prevent loss of sample from the sample receiving cavity by maximizing heat removal from the molten material through heat conduction to the thick wall structure of the mold surrounding the throat. The resulting high heat conduction away from the molten material at the venturi throat, once the molten material has stopped flowing into the sample cavity, causes the material in the throat to freeze first thus trapping the sample inside the sample cavity to prevent loss of molten material therefrom during removal of the device from a bath of molten material. The body of the sampler is preferably of the split mold type with a gasket of porous material between the mold halves to provide more uniform venting for the sample receiving cavity.
226211
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