FIELD TATARA IRON MAKING FURNACE AND IRON MAKING METHOD BY THIS FURNACE

摘要

PURPOSE:To obtain the raw material iron from which the swords equivalent to or resembling to old swords can be made by charging charcoal, iron ore, etc. into the tatara iron making furnace made into the special shape through disposition of a plurality of blast ports, raw material feed ports, etc. in the specified and performing reduction-refining at the specific temperature. CONSTITUTION:The tatara furnace is constituted by having the furnace bottom having the contour of the shape cutting a pear and the cover part 1 covering the furnace bottom, providing a plurality of blast ports 2, 2', 3, 3', 4, 4' relatively, letting the inside circumferential wall higher than the intermediate height of the inside surface above the furance bottom of the rear circular portion reach the inner top side of the cover part 1 in the shape having a gradation and providing a raw material feed port 10 at the top part. It is recommended to build the furnace bottom and cover part 1 by refractory clay. The reduction-refining is performed by blowing cold air through the blast ports 3, 3', etc. while charging charcoal, iron ore and flux through the charge port 10 and making the mean reduction temperature 1250 deg.C at the highest and the temperature of the in-furnace maximum temperature region 1430 deg.C at the highest.