ROTARY HEARTH FURNACE, AND OPERATION METHOD FOR ROTARY HEARTH FURNACE

摘要

PPROBLEM TO BE SOLVED: To provide a rotary hearth furnace capable of simplifying and compactifying a facility required for recycling charcoal material discharged outside from the furnace. PSOLUTION: The rotary hearth furnace 10 is composed of a charcoal material hopper 28 stacking charcoal material layers Lc on a hearth 14, a raw material hopper 30 stacking a mixture layer Lb comprising the charcoal material and raw material on the charcoal material layer Lc, a discharge device 38 discharging slug metal grains M from the hearth 14, a sizing device 44 separating the charcoal material from discharged objects of the discharge device 38 as minus sieve charcoal material Cu, a bifurcated chute 48 having a main passage 50 and a branch passage 52 and provided on the sizing device 44, a steel chain conveyor 54 conveying the minus sieve charcoal material Cu from the main passage 50 to the charcoal material hopper 28, and a new charcoal material hopper 28n capable of supplying new charcoal material to a new charcoal material input opening 67 of the chain conveyor 54. PCOPYRIGHT: (C)2006,JPO&NCIPI