Nkk Corporation

Jp Steel Plantech Co.

Hirotsugu Kubo

Norio Ao

Toshimichi Maki

Takashi Nakayama

Ryuji Yamaguchi

Yasuhiro Sato

Hideaki Mizukami

Teruo Tatefuku

The present invention provides an arc-melting apparatus which attains extremely high efficiency by preheating scraps using exhaust gas from the melting chamber. The arc-melting apparatus needs for no device to carry and supply an iron source to a melting chamber, which makes it possible to preheat the next charge. The arc-melting apparatus has a melting furnace which melts scraps, a preheating shaft connected directly to an upper part of one side of the melting furnace, an arc electrode for melting scraps in the melting furnace, a bucket for supplying scraps to the preheat shaft so as to continuously maintain scraps in the melting furnace and in the preheating shaft, a tapping portion having a tapping hole, being projected outward from the melting furnace and a tilting device for tilting the melting furnace on a side of the tapping portion. The tapping portion is arranged at an orthogonal direction to the direction of the supplied cold iron source. The preheating shaft of the melting furnace and the tapping portion have a distance between the mutual part, so that scraps do not flow out on a the tapping hole side.

Apparatus for arc-melting cold iron source and method thereof

A melting furnace including preheating vessels for preheating raw material, and a melting furnace body having a tilting device and a heating device for heating the preheated raw material. A furnace roof covers an upper part of the melting furnace body and a combustion chamber for burning a gas generated in the melting furnace body is arranged on the furnace roof. Feed openings are arranged at side faces of the combustion chamber to feed the preheated raw material into the melting furnace body, and the side faces of the combustion chamber are positioned at a right angle to a tilting direction of the melting furnace body. Supply openings are arranged at lower ends of the preheating vessels to supply the preheated raw material through the feed openings to the melting furnace body. A connecting mechanism is provided for movably connecting the supply openings with the feed openings when the melting furnace body is tilted.

Melting furnace having preheating vessel

Growing community of inventors

Yokohama, Japan

Hirotsugu Kubo