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| STUDY ON PURIFICATION OF A LOW GRADE Ca-BENTONITE AND OPTIMAL TECHNOLOGICAL CONDITIONS OF ITS Na-ACTIVATION |
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| DOI： |
| KeyWord:bentonite;purification;Na-activation;orthogonal test; |
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| Abstract: |
| A low grade Ca-bentonite from Inner-Mongolia is taken as the object of the study.The wet processing technology of purification is carried out to enhance the grade from 66.5% up to reach 95% under the condition of using sodium polyacrylate 0.5% as dispersantant and a slurry density of 15%.The optimal technological conditions of Na-activation are found by orthogonal test.A high quality Na-bentonite is obtained with d001-value of 1.2513nm,CEC-value of 118.23mmol/100g and swelling capacity of 30mL/g. |
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