Molten slag flow rate measuring device and furnace facilities using the same
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United States of America Patent
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-
Dec 2, 1997
Grant Date -
N/A
app pub date -
Aug 30, 1995
filing date -
Aug 30, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Vortex melting furnace facilities picks up an image of molten slag flow in a direction traverse to the molten slag flow discharged from the furnace, calculates a molten slag flow rate by brilliance discrimination of the image pick-up signal and controls a water feed rate of a molten slag wet granulation and granulated slag dewatering apparatus and a flow rate of the molten slag in the vortex melting furnace. A video camera is arranged such that a direction of image pick-up traverses to a direction of the molten slag flow and the resulting image is brilliance discriminated by a high brilliance area for the molten slag and a low brilliance area for a molten slag conduit, and the high brilliance area is converted to the fusion flow rate from a liquid level of the molten slag in the fusion conduit. In the molten slag wet granulation and granulated slag dewatering apparatus, when the molten slag flow rate exceeds a predetermined level as detected from the measurement of the flow rate, the normal water flow rate is increased to a predetermined level. In the vortex melting furnace, the flow rate of the molten slag at an exit of the melting furnace is fed back to the pitcher to control the flow rate of the molten slag.
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