METHOD AND APPARATUS FOR MEASUREMENT OF THICKNESS OF REFRACTORIES IN FURNACE

PROBLEM TO BE SOLVED: To precisely measure the thickness of refractories in a furnace by a method wherein elastic waves are transmitted from the outside surface of the refractory toward the inside, a gate is set near the time corresponding to the profile of the refractory out of a reflected signal a...

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Bibliographic Details
Main Authors KAWABATA YOHEI, MORITA SHIGETOSHI, TANAKA HIROYUKI, KOMINAMI HIDETAKA
Format Patent
LanguageEnglish
Published 08.12.2000
Edition7
Subjects
BLASTING
CHEMISTRY
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE
FURNACES
HEATING
KILNS
LIGHTING
MANUFACTURE OF IRON OR STEEL
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
MECHANICAL ENGINEERING
METALLURGY
METALLURGY OF IRON
OVENS
PHYSICS
RETORTS
TESTING
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To precisely measure the thickness of refractories in a furnace by a method wherein elastic waves are transmitted from the outside surface of the refractory toward the inside, a gate is set near the time corresponding to the profile of the refractory out of a reflected signal and the reflected signal is extracted from the inside surface of the refractory. SOLUTION: A shallowly inserted thermometer 4 and a deep inserted thermometer 5 are buried at a prescribed interval in the thickness direction of a refractory brick 3 near the outside surface 3a of the refractory brick 3 which is piled up via a stamp material 2 at the inside of the iron skin 1 of a blast furnace. An output signal is given to a computing unit 6. The profile of the refractory brick is estimated. Elastic waves are transmitted from a transmitter-receiver 8 which is installed at outside of the iron skin 1. Reflected waves from the inside end face of the refractory brick are received. A computing unit 14 sets a gate near the time corresponding to the profile of the refractory brick out of a received reflected signal. A correlation between the reflected signal inside the gate and a reflected-signal estimation model calculated by a computing unit 7 is processed. The thickness of the refractory brick is calculated on the basis of the correlation.
Bibliography:Application Number: JP19990144258