Fuji Electric Co., Ltd.

Takeo Takahashi

Hiroshi Hoshikawa

Yasuo Watanabe

Takayuki Morioka

Nobuyuki Motoyama

Koichi Tabei

Takanori Toyoshi

Tuyoshi Ishikawa

Toshio Uede

Keiji Haga

Sizuo Suzuki

A method of oxidatively decomposing a radioactive ion-exchange resin is described, the method comprising oxidatively decomposing a radioactive ion-exchange resin containing an anion-exchange resin with hydrogen peroxide used as an oxidizing agent in the presence of iron and copper ions used as catalysts, wherein the weight ratio of hydrogen peroxide to the ion-exchange resin, that is the ratio of the net weight of hydrogen peroxide to the dry weight of the ion-exchange resin containing an anion-exchange resin, is held to be no higher than 17 and the pH of the reaction system is adjusted to be within the range of 0.5 to 6, or citric acid ions are preliminarily adsorbed on the radioactive ion-exchange resin before it is subjected to decomposition treatment or citric acid ions coexist with the radioactive ion-exchange resin in the oxidatively decomposing system, and an apparatus used for conducting the method is also described.

Method of treating radioactive ion-exchange resins by oxidative

An improved traveling magnetic field-type apparatus for crushing, mixing, polishing, deburring and the like is provided, comprising a container containing working substances and a quantity of material to be crushed operatively arranged between first and second traveling magnetic field generators. The generators are selectively shiftable between a first orientation and a second orientation, in which like polarity and dissimilar polarities face each other across the container. The field generators may be circular and concentrically arranged, or in the shape of a circular arc. Diaphragms also may be provided in the container to distribute more uniformly the working substances and the material to be crushed. It has been determined that the working substances are more readily magnetized, resulting in a higher magnetic torque, if they are relatively longer in the axial direction than in the cross sectional direction. Weighted portions may also be provided at each axial end of the pieces of the working substance to further concentrate the mass at each axial end, and thereby further increase the torque.

Traveling magnetic field type crusher

An electrostatic sorting apparatus having a multistage sorting unit including a plurality of sorting conveyor belts on sorting plates aligned vertically within a cover housing. Each sorting conveyor belt or plate has a trough-like channel formed thereon for sorting a mixture of insulating particles and conductive particles. The particles of the mixture are subjected to repeated cycles of charging with a negative polarity, being attracted to a high voltage electrode, discharging, and dropping downwardly into sorting and recovering hoppers. Thus, the particles are vigorously elevationally moved between the sorting conveyor belt or plate and the electrode up and down and are finally collected in hoppers. The particles are accordingly uniformly agitated in the channel of the sorting conveyor belt or plate. Thus, the mixture is separated into the hopper with an enhanced quality of compost while fine foreign materials mixed therewith are removed from the compost.

Electrostatic sorting apparatus

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Kanagawa, Japan

Takeo Takahashi