Study on purification of bentonite from Kerjian
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Abstract
A low grade bentonite from Kerjian was taken as the object of the study and the wet processing technology of purification was carried out.The influence of bentonite slurry,centrifugal time,and centrifugal speed on the purification of bentonite were presented in orthogonal experiment.The characterization of raw bentonite and purtified bentonite was tested by XRD and IR.The results showed that the best conditions for purification was when the bentonite slurry was 1∶12,the centrifugal speed was 1 200 r/min,the centrifugal time was 5 min.Under this condition,the expansion capacity,the ethylene blue adsorbed,the colloidal value and the cation exchange capacity of the bentonite were improved.The XRD and IR of raw bentonite and purtified bentonite showed that the impurities peaks was reduced but montmorrilonite peak was strengthened after purtification,so the purity effect was obviously improved.
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