Kabushiki Kaisha Takuma

Nihon Jukagaku Kogyo Kabushiki Kaisha

Kunihiko Uno

Hajime Hirotomi

Kunihiro Nakazato

Jiro Mihara

Shigeo Kimura

Hideo Tanaka

Kiyoaki Takai

Masahide Nishigaki

Tamotsu Kodera

Yoshinori Tamade

Seiya Horino

Sadao Kurihara

The present invention relates to a rotation crusher which treats refuse and seeks to prevent explosions by controlling the volume of steam fed into the crusher to keep the temperature inside a main body of the crusher between about 70.degree. C. to 100.degree. C. so that the steam content may be regulated to exceed a certain value to keep the oxygen content below an explosion preventive critical value, thereby preventing completely explosions inside the crusher.

Explosion preventive rotation crusher

An electric melting furnace is provided with an exit comprising an overflow dam and a downwardly extending unmolten-substances blocking plate placed inwardly of the overflow dam. The exit is positioned on or near an extension of a line connecting the center O of a furnace body and one of the furnace electrodes, the distance L in centimeters between the electrode and the overflow dam being determined by the equation: ##EQU1## where P is the electric furnace load (w) and K is a constant in the range of 16 to 25. Lighter molten substances are continuously discharged over the dam under the weight of the combustion residue. Heavier molten metals accumulate on the furnace floor and are discharged over dam by tilting the furnace body in the direction of the exit. The furnace has a measuring means placed at an upper interior portion of the furnace for measuring the temperature of the furnace gases and another measuring means placed on the discharge passage for measuring the quantity of the luminous energy radiated by the molten substances. The values obtained by the temperature measuring means and the luminous energy measuring means are compared with respective standard values as set in advance to determine the feeding of the combustion residue. When one or both of the feeding conditions is/are met, a fixed amount of the combustion residue is fed into the furnace by opening a feeding gate.

Continuous melt electric furnace with continuous discharge

Growing community of inventors

Hirakata, Japan

Kunihiko Uno