Hot gunning robot for furnace lining

B - Operations – Transporting – 05 – B

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B05B 3/02 (2006.01) B05B 13/04 (2006.01) F27B 3/10 (2006.01) F27D 1/16 (2006.01)

Patent

CA 1274869

HOT GUNNING ROBOT FOR FURNACE LINING ABSTRACT During refining of scrap, a lining on the wall or the bottom of a furnace is eroded by high temper- ature molten steel and slag. Sludgy lining material is spouted toward the worn lining by a hot gunning robot. The lining material is solidified under the high temperature condition immediately after the tap- ping and the furnace lining is mended. The hot gunning robot moves a gunning nozzle along a verti- cal center line of the furnace and changes the tilt- ing angle of the gunning nozzle to perform mending of the required portions continuously and automati- cally. The hot gunning robot comprises a gunning nozzle, a shifter and a nozzle carrier. The shifter transfers the nozzle carrier from a housing position to a mending position of the furnace and consists of parallelogram-links and an actuator which moves the links. The nozzle carrier travels in an upright posture, and not only the furnace wall but also the furnace bottom is mended by the rotating and tilt- ing of the gunning nozzle. A water feeding tube is fitted on a vertical feeding pipe which feeds the lining material and homogeneous sludgy lining material is obtained by mixing the lining material powder with water spouted through a mouthpiece. The sludgy lining material is introduced into the gunning nozzle smoothly by guide vanes provided in a cylindrical nozzle supporter. The nozzle carrier is partitioned into a driving chamber and an air chamber and both of chambers are cooled by feeding air. A driving system and a bearing system for the vertical feeding pipe is protected from the heat of the furnace. Swinging of the long vertical feeding pipe is prevented by a stabilizer.

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