PURPOSE: To obtain a material reutilizable as a magnetic material at a low cost by collecting a material produced in a boiler and pipings and containing ferromagnetic fine particles.
CONSTITUTION: This material is formed in an aqueous solution in a boiler or pipings and contains ferromagnetic fine particles. The material contains ferromagnetic fine particles and provides a magnetic material having a value added by subjecting the material to heat-treatment and processing treatment and reutilizing as a ferromagnetic material such as magnetic tape and magnetic card. The material is producible without requiring additional production cost because it is a by-product of a formation process in an aqueous solution in a closed boiler or pipings. The product can create on industrial value and bring a profit, which can sufficiently compensate the cost for the separation of the product.
SATO TOSHIHIKO
SEKI MASAHIRO
MIYAGAWA SUMIO
NTT ADVANCED TECH KK
ISHIBASHI SHINICHIRO
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