| 摘要 |
PROBLEM TO BE SOLVED: To uniformly heat plural metallic wire rods by changing distances of the parallel arranged metallic wire rods from the inner surface of a lower wall when viewing the cross section in the width direction of a heating furnace according to the heat input quantity per the unit vol. of each metallic wire rod received from the inside of the furnace with the heating. SOLUTION: Heating means 9a, 9b in the horizontal burning type heating furnace dispose pairs of combustion burners to the right and the left side walls so as to jet the heating flames in the horizontal direction. When the metallic wire rods 8a, 8b,...8n are heated in the heating furnace 1, the distances La, Lb,...Ln of the parallel arranged metallic wire rod 8a, 8b,...8n from the inner surface 3a of the lower wall, are changed when viewing the cross section in the width direction of the heating furnace 1, according to the heat input quantity per the unit vol. of each metallic wire rod 8a, 8b,...8n received from the inside of the furnace 1 with the heating. The whole of plural metallic wire rods parallel arranged can uniformly be heated by adopting this constitution.
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