To provide a simple method capable of always recovering a calcium component and a lead component in a high recovery ratio regardless of the large content of the calcium component in a fine powder using a reduced number of processes and a reduced number of chemical agents, in a treatment method for separating the calcium component and the lead component from the fine powder containing the calcium component and the lead component to recover them.
The treatment method of the fine power containing the calcium component and the lead component includes a process (A) for mixing the fine powder being a treatment target and water to obtain a slurry, a process (B) for producing calcium sulfate by adding sulfuric acid to the slurry while allowing the slurry obtained in the process (A) to circulate through a flow passage in one direction, a process (C) for forming lead sulfide by adding a sulfiding agent to the slurry obtained in the process (B), a process (D) for making the lead sulfide in the slurry hydrophobic by adding a collector to the slurry obtained in the process (C) and a process (E) for obtaining floating ore containing lead sulfide and sedimented ore containing calcium sulfate by subjecting the slurry obtained in the process (D) to flotation treatment.
ICHINOTSUBO YUKITERU
OGAMI TAKEAKI
MIURA KEIICHI
Shuichi Kitamura