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| STUDY ON INFLUENCE OF SOLVENT IONS IN MUD SEPARATION IN BAYER PROCESS OF ALUMINA INDUSTRY |
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| DOI： |
| KeyWord:flocculation;carbonate;calcium ion;Bayer process; |
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| 1.College of Environment and Chemical Engineering;Nanchang University;Nanchang 330031;China;2.College of Chemistry and Chemical Engineering;Central South University;Changsha 410083;China |
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| Abstract: |
| The Bayer digested ore slurry contains caustic alkali(Na2Ok) is 137.4 g /L,and the content of carbonate sodium amounts to 31.63g/L.The experiment results show that the carbonate ion,humic salt and organic impurity in mud slurry are firstly adsorbed on the surface of slurry ore grain,which affects flocculation and settlement.A few calcium ion(2.7 g/ L)can increase the activity of synthesis polymer.Calcium ions can reduce the static electricity repulsion generated by the reaction process of polymer anion with... |
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