Nippon Crucible Co., Ltd.

Tamio Okada

Toshiaki Sano

Michio Matsuura

Hideo Yoshikawa

Tomohiro Hatanaka

Tadao Sasaki

Nobuyuki Oka

Kazumasa Murakami

Ryouichi Kishida

Masato Yoshida

Shinnosuke Takeuchi

Hiroshi Goda

Masaoki Nakabayashi

Katsuyuki Shirakawa

Piao Long Yun

Crucible for melting

A crucible-type continuous melting furnace includes a preheating tower for storing the material to be melted, and an exhaust port on the top thereof; a melting crucible furnace disposed below the preheating tower and having a melting crucible to which the material to be melted is supplied from the preheating tower; a heating burner for heating the melting crucible; and a preheating burner for preheating the material to be melted and disposed in a position that is higher than the heating burner; the melting crucible furnace having an introduction portion for introducing a combustion gas from the heating burner into the preheating tower; and the melting crucible having a molten metal outlet on the side wall for discharging the molten metal obtained by melting the material.

Crucible-type continuous melting furnace

Melting and holding furnace for aluminum blocks

A continuous melting apparatus for a low melting point metal is disclosed. The apparatus includes a melting furnace main body (5) forming a combustion chamber (6) surrounded by a refractory lining, a crucible (1) formed with a tapping orifice (2) at an appropriate position of a body and housed at the center portion of said combustion chamber, a burner (8) provided on a side wall portion of said melting furnace main body (5) for heating said crucible (1) in said combustion chamber (6) and a receptacle (6, 13) for receiving a melt flowing out through said tapping orifice (2) of said crucible (1). In the continuous melting apparatus, with employing a melting method of burner heating type which is inexpensive, easy to handle and maintenance, with successfully minimizing oxidation loss which was the shortcoming of the burner type. Also, generation of corundum on the furnace wall surface due to reaction of the aluminum melt and the furnace wall can be successfully avoided.

Continuous melting apparatus for low-melting point metal, improved

An immersion nozzle for continuous casting resistant to the corrosive action of the melt and the covering material in a mold is made of a refractory material comprising a mixture of electrically conductive graphite and/or silicon carbide, at least one member selected from the group consisting of alumina, zircon, zirconia, fused silica and a metallic silicon, and a binder. The nozzle is covered with a thermal insulating cover having a thickness of approximately 60 mm and made of fused silica containing fibers. The nozzle is preheated without moving it from its operating position by connecting a pair of electrical terminals to opposite ends thereof and passing electric current through the nozzle between the terminals for a period of time sufficient to raise the temperature of the nozzle sufficiently to prevent cracking, spalling, etc. during casting operation. After the preheating is completed the terminals may be removed from the nozzle. The insulating cover may be retained on the nozzle during tapping or the portion thereof that is immersed in the melt may be cut away.

Method of preheating immersion nozzle for continuous casting

A guide trough for molten products comprising an elongated body made of monolithic refractory material. A runway for conducting molten products is formed in the top surface of the elongated body, and a pair of reinforcing beams are embedded within the elongated body extending longitudinally thereof on opposite sides of the runway and proximate the top surface in which the runway is formed. Cross-members are spaced apart longitudinally of the elongated body and extend across the bottom thereof for interconnecting the reinforcing beam. Recesses in the elongated body expose portions of the reinforcing beams to render accessible portions of the reinforcing beams to allow them to be engaged, in use, by hooks for lifting the guide trough.

Guide trough for molten products

Growing community of inventors

Tokyo, Japan

Tamio Okada