To provide a method for treating fine powder capable of separating a calcium component and a lead component from the fine powder containing the calcium component and the lead component by a simple operation to recover the lead component with a high rate.
The method for treating fine powder comprises: the step (A) of mixing fine powder containing the calcium component and the lead component, water and a sulfurizing agent to obtain slurry containing a solid content of sulfurized lead; the step (B) of subjecting the slurry to solid-liquid separation to obtain a solid content containing sulfurized lead and a liquid content containing a water-soluble sulfur component originated from the sulfurizing agent; the step (C) of adding water and sulfuric acid to the solid content obtained by the step (B) and mixing to obtain a slurry containing a solid content of sulfurized lead and calcium sulfate; the step (D) of adding a collecting agent to the slurry obtained in the step (C) to hydrophobize the sulfurized lead in the slurry; and the step (E) of subjecting the slurry obtained in the step (D) to flotation treatment to obtain a floating mineral containing the sulfurized lead and a precipitated mineral containing calcium sulfate.
COPYRIGHT: (C)2009,JPO&INPIT
Shinichi Kurosawa
Takayuki Suzuki
Takeshi Ogami
Keiichi Miura
| JP2006346512A | ||||
| JP10109077A | ||||
| JP7109533A | ||||
| JP11010131A | ||||
| JP2007119830A |
| WO2006035631A1 |
Shuichi Kitamura