| 摘要 |
PROBLEM TO BE SOLVED: To supply a compressible charge into a furnace in an excellent sealing performance while keeping differential pressure inside and outside a furnace intact by consolidating the charge. SOLUTION: There is provided a throttling section 42 having a cross sectional area less than that of charge supply pipe line 41 at an end of an output side of the charge supply pipe line 41, and a compressible charge supplied into the supply pipe line 41 is forcedly loaded in the charging direction. Cock, effect is raised by inserting the charge into the throttling section 42 with high pressure, and hence sealing performance between the inside and outside of the furnace is raised. The charge consolidated in the throttling section 42 passes through a successive expansion supply pipe line 43 and is successively fed into the furnace in the state of reduced resistance to achieve stable insertion into the furnace.
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