Study on the sedimentation of micro kaolinite enhanced by coal gasification fine slag
The influence of coal gasification fine slag(CGFS)on sedimentation of kaolinite under different pH solution environment and different flocculant dosage was explored.It was found that CGFS could enhance the sedimentation of fine kaolinite in a variety of solution environments.In acidic conditions,the surface of CGFS is positively charged,and it is easier to agglomerate with micro-fine kaolinite with negative surface charge.When the pH was 7,the turbidity of the supernatant decreased from 56754 NTU to 27918 NTU.At the same time,CGFS can enhance the flocculation and sedimentation effect of anionic polyacrylamide on kaolinite,and the turbidity of the supernatant could be reduced from 8217 NTU to 2020 NTU.
coal gasification fine slagkaolinitesedimentationturbidityanionic polyacrylamide
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