| Flotation de-silicating from diasporic-bauxite with cetyl trimethylammonium bromide |
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| 作者姓名： | WANG Yu-hua |
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| 作者单位： | School of Resources Processing and Bioengineering，School of Resources Processing and Bioengineering，School of Resources Processing and Bioengineering Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China |
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| 基金项目： | Project(G19990 6 4 90 1)supportedbytheNationalKeyFundamentalResearchandDevelopmentProgramofChina |
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| 摘 要： | 1 INTRODUCTIONTheZetapotentialsofkaolinite ,illiteandchlo riteweremeasuredforthecoalflotation ,allthesethreeclaymineralswerenegativelychargedinthepHrangeof 2 .5 11.0 1] .Theadsorptionofsodiumdode cylsulfateanddodecyltrimethylammoniumchlorideontokaolinitewasstudiedintheabsenceandpresenceofsodiumhexametaphosphate .Itwasfoundthatthepresenceofthelongchainphosphatedecreasedad sorptionoftheanionicsurfactantbutincreasedthead sorptionofthecationicsurfactant2 ] .Acommercialmonoetheramineandac…
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| 收稿时间： | 29 April 2003 |
| 修稿时间： | 26 June 2003 |
Flotation de-silicating from diasporic-bauxite with cetyl trimethylammonium bromide |
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| Wang Yu-hua , Hu Yue-hua and Liu Xiao-wen.Flotation de-silicating from diasporic-bauxite with cetyl trimethylammonium bromide[J].Journal of Central South University of Technology,2003,10(4):324-328. |
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| Authors: | Wang Yu-hua Hu Yue-hua and Liu Xiao-wen |
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| Affiliation: | (1) School of Resources Processing and Bioengineering, Central South University, 410083 Changsha, China |
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| Abstract: | Using cetyl trimethylammonium bromide (CTAB) as collector, the flotation de-silicating from diasporicbauxite was investigated.
And the Zeta potentials and contact-angles of silicate minerals and diaspore were also studied. The results show that in the
presence of 2×10−4 mol·L−1CTAB, the surface charges of pyrophyllite, kaolinite and illite become more positive, and the contact angles of these three
silicates also increase evidently in the pH range of 2–8, but the Zeta potentials and contact angles of diaspore change little.
So, the floatability of the four minerals is in the following order: pyrophyllite>kaolinite∼illite>diaspore. The open-circuit
flotation results also show that a bauxite concentrate with m(Al2O3)/m(SiO2) over 9.3 and Al2O3 recovery over 76% can be obtained from diasporic-bauxite ore. The result of XRD of the bauxite concentrate shows that pyrophyllite
is easier to be removed from diasporic-bauxite than illite and kaolinite due to its better floatability.
Foundation item: Project (G1999064901) supported by the National Key Fundamental Research and Development Program of China |
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| Keywords: | aluminum-silicate bauxite reverse flotation cetyl trimethylammonium bromide |
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