Title:
METHOD FOR PURIFYING FLUORAPATITE AND METHOD FOR PREPARING FLUOROHYDROXYAPATITE BIOCERAMIC THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/181574
Kind Code:
A1
Abstract:
Disclosed are a method for purifying a fluorapatite and a method for preparing a fluorohydroxyapatite bioceramic thereof, wherein same belong to the technical field of mineral processing. The method for purifying a fluorapatite is: grinding a fluorapatite ore, stirring and slurrying same, adjusting the pH value thereof, adding an inhibitor and a collecting agent, and then inflating same for roughing so as to obtain a rougher concentrate and rougher tailings; slurrying the rougher concentrate, adjusting the pH value thereof, adding an inhibitor for cleaning so as to obtain a fluorapatite concentrate and cleaner tailings; and adding water to the fluorapatite concentrate and slurrying same, then adding phosphoric acid for leaching, subjecting same to solid-liquid separation, and drying same to obtain a purified fluorapatite. Water is added to the purified fluorapatite and same is stirred to remove the agent, concentrated nitric acid is added thereto for dissolution and NaOH is added for a hydroxy reaction, and same is subjected to calcination and crystallization so as to obtain the fluorohydroxyapatite bioceramic.
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Inventors:
YIN WANZHONG (CN)
HAN HUILI (CN)
CAO BIN (CN)
YAO JIN (CN)
YANG BIN (CN)
ZHAO CHEN (CN)
SUN HAORAN (CN)
HAN HUILI (CN)
CAO BIN (CN)
YAO JIN (CN)
YANG BIN (CN)
ZHAO CHEN (CN)
SUN HAORAN (CN)
Application Number:
PCT/CN2019/078942
Publication Date:
September 17, 2020
Filing Date:
March 21, 2019
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
B03B7/00; C04B35/447
Foreign References:
| CN101602031A | 2009-12-16 | |||
| CN108584899A | 2018-09-28 | |||
| CN102482090A | 2012-05-30 | |||
| CN109876928A | 2019-06-14 | |||
| CN101781796A | 2010-07-21 | |||
| CA2631092A1 | 2008-11-11 |
Other References:
TANG, PEIWEI: "Non-official translation: Study on Flotation Separation of Apatite and Regulated Gangue", CHINA MASTER’S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCE AND TECHNOLOGY I, no. 1, 15 January 2012 (2012-01-15), ISSN: 1674-0246, DOI: 20191206180834Y
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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