Kawasaki Steel Corporation

Haruji Okuda

Kenichi Sorimachi

Tsutomu Nozaki

Yukio Oguchi

Shinji Kojima

Hakaru Nakato

Nobuyoshi Takashiba

Kenji Saito

Kiyoshi Takahashi

Katsuo Kinoshita

Shigeru Ohmiya

Yoshiyuki Tanaka

Koji Hosotani

Kenji Murata

Ryuichi Ikeda

Slag coating is accomplished by blowing a gas from a top-blown lance such that slag is splashed uniformly onto the barrel and throat near the trunnion of the converter; the lance height is adjusted to 0.7-3.0 m and the gas flow rate is adjusted to 250-600 Nm /min and, after gas blowing, the remaining molten slag is incorporated with a slag solidifier containing MgO or CaO and the molten slag is splashed toward the desired part of the converter wall that needs repair.

Method for slag coating of converter wall

A method and apparatus for vacuum degassing blows gas into molten metal so as to form a substantially uniformly distributed bubble over the path area defined by an induction pipe. In order to achieve this, discharge nozzles are separated into at least two groups. The pressures of the gases discharged through the discharge nozzles in different groups are controlled independently of the other so that gas blown through a first group of nozzles forms bubbles at around the central portion of the induction pipe and the pressure of the gas blown through the other group of nozzles is adjusted for forming the bubbles in the vicinity of the periphery of the induction pipe.

Method and apparatus for degassing molten metal utilizing RH method

In an immersion nozzle for continuous casting, at least one portion of reduced a sectional area of passage for molten metal is formed near to the bottom of the nozzle and plural discharge ports symmetrically arranged with respect to the axis of the nozzle are arranged above and below the reduced sectional area portion in the longitudinal direction of the nozzle. Further, molten metal is continuously cast by using the above immersion nozzle together with a static magnetic field.

Immersion nozzle for continuous casting

Growing community of inventors

Okayama, Japan

Haruji Okuda