Hitachi Zosen Corporation

Hiroshi Kosaka

Yoshitoshi Sekiguchi

Michio Ishida

Kunio Sasaki

Tsutomu Kuwahara

Keisuke Takemoto

Toshio Hirai

Hirokazu Imoto

Hideo Sato

Shiro Sakata

A solar light collecting device includes: a rectangular-shaped frame-like bodysupported by a strut bodyso as to be tiltable in a vertical plane; a flexible reflecting mirrorhaving two side edgesheld by the frame-like bodyand a quasi-parabolic cross section along the short sides thereof to reflect solar light; and a tilting cylinder devicewhich tilts the frame-like bodyaccording to the altitude of the sun and guides the light reflected by the reflecting mirrorto a heat collecting device disposed at the focal point of the reflecting surface of the reflecting mirror. A curve adjusting devicecontacts the rear surface of the reflecting mirroraccording to the tilting position of the reflecting mirrorto change the degree of curve of the reflecting surface.

Solar light collecting device and solar heat collecting facility

A plasma melting furnace has a melting chamber having an anode torch and a cathode torch made of graphite and having a electric conductor disposed on the bottom thereof. When the furnace is operated, the anode torch, having an inflow of electrons, which forms an unstable plasma arc is contacted with the electric conductor and is not used, while the cathode torch, having an outflow of electrons, which forms a stable plasma arc, is utilized for heating, whereby the furnace can be stably and continuously operated. Thus, since the cathode torch which is used is not heated so much and the anode torch, which is liable to be heated to a great degree, is not used, the electrode consumption rate can be greatly reduced.

Plasma melting method and plasma melting furnace

Growing community of inventors

Osaka, Japan

Hiroshi Kosaka