To provide a method for easily and efficiently treating iron precipitate produced in a process of refining nickel, while solving problems originating in an influence of chlorine contained in the iron precipitate and the properties of the iron precipitate.
In a process of producing rough zinc oxide by reduction-burning steelmaking dust, this treatment method includes the steps of: mixing the iron precipitate produced in the process of refining nickel with the steelmaking dust so that the ratio of lead to chlorine after they have been mixed can be 1:2 to 1:3 in terms of an weight ratio of Pb to Cl; granulating the mixture; and charging the obtained pellet into the process of producing the rough zinc oxide. The iron precipitate can be easily treated by being formed into a pellet. Chlorine contained in the iron precipitate can be used for enhancing a volatilization rate of lead. In addition, a heavy metal can be used as a steelmaking material by being fixed in a reduced iron pellet.
COPYRIGHT: (C)2009,JPO&INPIT
Katsuhiko Nagai
Yasuhiro Matsumoto
Tetsuya Koshino
Katsuhiko Ikeda
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