To provide a treatment method which enables a fractional recovery of a calcium component and a lead component from micropowders containing the calcium component and the lead component.
The method comprises (A) the process of mixing the micropowders containing the calcium component and the lead component, water and a sulfuric acid to obtain a slurry containing a calcium sulfate which is a solid content, (B) the process of adding a sulfating agent to the slurry obtained in the process (A) to obtain a slurry containing a lead sulfide and the calcium sulfate which are the solid content, (C) the process of adding a collector to the slurry obtained in the process (B) to hydrophobize the lead sulfide in the slurry, and (D) the process of carrying out an ore floatation treatment of the slurry obtained in the process (C) to obtain a float ore containing the lead sulfide and a precipitated ore containing the calcium sulfate.
SUZUKI TAKAYUKI
OGAMI TAKEAKI
MIURA KEIICHI
Shuichi Kitamura