Title:
フッ素除去方法
Document Type and Number:
Japanese Patent JP7102876
Kind Code:
B2
Abstract:
To provide a method capable of easily, inexpensively and effectively separating and removing fluorine from a fluorine-containing wastewater generated from non-ferrous metal smelting processes while suppressing the formation of precipitates.SOLUTION: A method for removing fluorine from fluorine-containing wastewater containing sulfate ions generated from non-ferrous metal smelting processes includes a phosphoric acid addition step of adding phosphoric acid to the fluorine-containing wastewater, a magnesium hydroxide addition step of adding magnesium hydroxide to the fluorine-containing wastewater after the phosphoric acid addition step, and a fluorine precipitation and removal step of adding slaked lime to the fluorine-containing wastewater after the magnesium hydroxide addition step to separate and remove generated fluorine-containing precipitates.SELECTED DRAWING: Figure 1
Inventors:
Jiro Nakanishi
Asano Satoshi
Nobuyuki Kaji
Takenouchi Hiroshi
Asano Satoshi
Nobuyuki Kaji
Takenouchi Hiroshi
Application Number:
JP2018071951A
Publication Date:
July 20, 2022
Filing Date:
April 03, 2018
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C02F1/58
Domestic Patent References:
| JP2016203130A | ||||
| JP2002316172A | ||||
| JP2001340870A | ||||
| JP2008188484A | ||||
| JP60075393A | ||||
| JP10263558A | ||||
| JP2011000534A |
Foreign References:
| WO2008120704A1 | ||||
| US4226710 |
Attorney, Agent or Firm:
Akira Koike
Takaaki Kono
Hiroyuki Murakami
Takaaki Kono
Hiroyuki Murakami