Nippon Steel Corporation

Hachiro Harajiri

Yoshun Yamamoto

Kametaro Itoh

Yasuhiko Kato

Wataru Takahashi

Yoshihiro Ono

Kazuhiro Kuribayashi

Yoshihiro Ishida

Norio Fukinaka

Youichi Tawara

Kazuki Murahashi

Waste material containing combustible waste substances and incombustible waste substances along with carbonic massive combustibles are feed for passage in a furnace in the form of packed layers. Lower stage tuyeres feed burning support gas in the burning and melting zone of the furnace. Upper stage tuyeres feed burning support gas in the heat decomposing zone of the furnace. Total oxygen fed by the upper and lower tuyeres is 130 to 600 Nm,per one ton of waste. The ratio of the quantity of oxygen fed from the upper stage tuyeres to the total quantity of oxygen fed from both the upper and lower stage tuyeres is 0.2 to 0.8. Oxygen fed from the lower stage tuyeres is at least 0.8 times the theoretical oxygen required for burning the carbonic massive combustibles.

Burning/melting method of waste melting furnace

An immersion cooling apparatus includes a mechanism for immersing a hot metal pipe with the axis thereof directed horizontally in a cooling tank containing cooling liquid, and a mechanism for locking the immersed pipe in position in the cooling tank. While the locking mechanism is preventing the pipe from moving, a nozzle extending toward the interior of the pipe in the direction of the pipe axis injects cooling liquid into the pipe. The cooling liquid thus injected flows completely through the pipe so that the pipe being cooled is not injured or bent.

Immersion cooling apparatus for hot metal pipes

Growing community of inventors

Kitakyushu, Japan

Hachiro Harajiri