To provide a method for practically recovering a zinc with which in the case of recovering the zinc from secondary dust generated in a reduction furnace for reducing sub-production materials, such as iron and zinc-containing dust, slurry, etc., generated from an iron-making process, a zinc concentration ratio and also, a zinc recovering ratio are raised.
This method is separated into the portion for using a zinc raw material containing much zinc fine particles and the portion for using the iron-making material containing much iron particles, by passing through the following two processes; a first process, in which after turning to slurry having 8-10 pH to the secondary dust generated in the reduction furnace, the fine particles of much zinc content stuck on the large particles of much iron content, are exfoliated under micro state with the treatment method, such as supersonic cleaning; and a second process, in which the portion containing much fine particles of much zinc content and the portion containing much iron particles, generated in the first process, are separated with the means, such as a wetting type magnetic separation.
COPYRIGHT: (C)2009,JPO&INPIT
Tomoyuki Kamijo
Yoshihiro Kamikawa
| JP2005021841A | ||||
| JP55104434A |
Takato Tsutsumi