C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
182/12, 134/35,
C02F 1/62 (2006.01) C02F 1/28 (2006.01)
Patent
CA 1166548
ABSTRACT OF THE DISCLOSURE A powder of a slag formed at the time of manufacturing steel is used to remove heavy metals contained in waste water. After use, the slag may be heated to recover the heavy metals adsorbed thereby or the used slag may be formed into solid blocks, balast or aggregate by admixing with Portland cement or alumina cement. The slag utilized in this invention can be ob- tained in a large quantity at low cost. The heavy metals once adsorbed by the slag is stable and does not readily dissolve in water. Thus the invention is useful to prevent public hazard caused by waste water containing harmful heavy metals.
355995
Ikehata Takao
Nakahara Keisuke
Tate Kazuhiko
Yamashita Kasane
Nippon Kokan Kabushiki Kaisha
Swabey Ogilvy Renault
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