利用化学共沉淀法，在处理铬渣的同时，制备四氧化三铁。
Fe3O4 was prepared by using chemical precipitation in dealing with chromium residue simultaneously.
本文叙述了化学沉淀法处理电镀锌镍合金废水所得到的污泥回槽利用问题。
This paper presented putting use of the wasted mud residue of plating Zn-Ni alloy to reclaiming bath by chemical deposition method.
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