Method and apparatus for repairing damaged surface of refractory lined vessel
AssigneeNippon Steel Corporation
InventorsTsunemi Ochiai, Teruyuki Nishitani
Life of this patent
Estimating the term…
Abstract
A method and apparatus for repairing lining which comprises transmitting microwaves modulated by an antenna inserted into the vessel to the surface of the heated refractory lining in the refractory lined vessel, detecting the reflected waves, detecting the difference between the reference surface of the refractory lining and the damaged surface from the phase difference of the microwaves, controlling the transfer of the refractory gunning nozzle inserted into the vessel with the use of the deviation signal, and making the lining repair in the hot atmosphere.
Claims10
In a method of repairing a damaged portion of the lining of a refractory lined vessel which comprises setting a reference position in the space of a vessel whose heated refractory lining is not substantially cooled, inserting an antenna and monolithic refractory nozzle into the vessel which are directed to the lining surface, causing microwaves transmitted from the antenna to reflect with the lining surface while shifting the antenna, receiving the microwaves, measuring the distance between each position on the lining surface and the reference position from the phase difference between the transmitted waves and received waves, comparatively operating the distance and a distance between the reference lining surface and the reference position, taking out deviations of each position as electric signals, controlling the transfer of the nozzle by employing the deviation signals, gunning the monolithic refractory to the deviated portion which needs repair and repairing the refractory lining.
Dependencies are inferred from the claim text.