Title:
PROCESS FOR PRODUCING TITANIUM DIOXIDE CONCENTRATE
Document Type and Number:
WIPO Patent Application WO/2012/137359
Kind Code:
A1
Abstract:
The present invention enables a high-grade concentrate in which titanium dioxide has been highly concentrated to be inexpensively produced from a low-grade titanium dioxide ore. A powdery titanium dioxide ore is subjected to reverse flotation (A) and flotation (B) in this order. In the reverse flotation (A), a concentrate is sedimented in an aqueous solution to which a cationic collector and starch have been added and which has a pH adjusted to 10 or higher. In the flotation (B), a concentrate is floated in an aqueous solution to which an anionic collector, hydrofluoric acid, and a frothing agent have been added and which has a pH adjusted to 2-3. It is preferred that the reverse flotation (A) and the flotation (B) should be preceded by a step in which a powdery titanium dioxide ore obtained through particle size regulation (F) is subjected to gravity concentration (G) and magnetic separation (H) in this order, and that the reverse flotation (A) and the flotation (B) should be succeeded by a step in which the concentrate separated through flotation in the flotation (B) is subjected to gravity concentration (C), drying (D), and magnetic separation (E) in this order.
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Inventors:
ARAYASHIKI RYUICHI (JP)
IKEDA SHIGEKI (JP)
IKEDA SHIGEKI (JP)
Application Number:
PCT/JP2011/062642
Publication Date:
October 11, 2012
Filing Date:
May 26, 2011
Export Citation:
Assignee:
JFE MINERAL CO LTD (JP)
ARAYASHIKI RYUICHI (JP)
IKEDA SHIGEKI (JP)
ARAYASHIKI RYUICHI (JP)
IKEDA SHIGEKI (JP)
International Classes:
C22B34/12; B03B5/44; B03B7/00; B03C1/00; B03D1/02; B03D1/08; C01G23/047
Foreign References:
| JPS4859003A | 1973-08-18 | |||
| JPS4317281B1 | ||||
| JPH02504601A | 1990-12-27 |
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
Ken-ichiro Ochiai (JP)
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Claims: