BILLET HEATING FURNACE

摘要

PROBLEM TO BE SOLVED: To provide a billet heating furnace capable of quickly heating a billet for extrusion molding even in a direct heating system at the same degree as that in an electromagnetic induction system. SOLUTION: This billet heating furnace is provided with a first burner means 38 arranged in a uniform heating region 28 for uniformly heating a billet 14 for extrusion molding, and a second burner means 44 arranged in a taper heating region 30 for taper heating the billet 14 after heating. The second burner means 44 is composed of an oxygen burning burner 72, but may be composed of an oxygen enrichment burner. The first burner means can also be constituted of an oxygen burning burner 52 or the oxygen enrichment burner.