| 摘要 |
PROBLEM TO BE SOLVED: To realize a combustion melting furnace with high combustion efficiency by avoiding flameproofing of a thermal decomposition carbon by means of a heat treatment in the combustion melting furnace and optimizing a thermal decomposition carbon feed-in position. SOLUTION: In this combustion melting furnace 1, when an interval in a vertical direction between a thermal decomposition carbon feed-in nozzle 3 and a secondary air nozzle 5 is taken as A, an inner diameter in the combustion melting furnace is taken as B, and a feed-in angle to a horizontal surface of the thermal decomposition carbon feed-in nozzle is taken asα, the thermal decomposition carbon feed-in nozzle 3 is disposed obliquely downward at a position of the interval A which is determined by A=(B/2) tanα,α=20 to 70 degrees. A thermal decomposition gas feed-in part 7 and a thermal decomposition carbon feed-in part 8 are separated from each other, and it is possible to prevent the thermal decomposition carbon from flameproofing by means of heat treatment caused by combustion of the thermal decomposition gas. Thus, combustion efficiency can be improved, and the size of the combustion melting furnace can be reduced. COPYRIGHT: (C)2003,JPO
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