Patent ID: 6537485
Filing Date: 2003-03-25
Classification: F27B,F27D,H05B

Abstract:
A metal melting apparatus, which comprises:(1) a furnace casing having a refractory furnace wall, (2) an air-tight and non-electrical conductive seal jacket provided on an outer circumference of said refractory furnace wall, (3) vertical water cooling pipes disposed along the inner circumference of said seal jacket, said pipes being arranged apart from one another at a predetermined interval, (4) an induction heating coil arranged to encircle the furnace casing and disposed outside the furnace casing through space, and (5) a frame secured to said seal jacket for supporting said furnace casing through said seal jacket, wherein the water cooling pipes comprise copper pipes closely disposed in a circumferential direction, the pipes are spaced apart such that the distance between central positions of the pipes is within 3D whereby D is defined as the outer diameter of each water cooling pipe.