阳离子聚丙烯酰胺与膨润土对细小纤维-碳酸钙共絮聚的影响

Research on Co-Flocculation of Fine Fiber and Calcium Carbonate under the System of CPAM/Bentonite

以杨木P-RC APMP浆为原料进行筛分,将细小纤维与碳酸钙进行共絮聚,研究在CPAM/膨润土微粒助留体系中,不同CPAM添加量对细小纤维-碳酸钙共絮聚团和浆料的电性、共絮聚团大小、细小组分留着性能以及膨润土添加量对共絮聚团大小、分布及细小组分留着的影响。结果表明:随着CPAM用量的增加,细小纤维-碳酸钙絮聚团的表面负电荷与浆料的Zeta电位绝对值都在不断减小,细小组分的留着率在不断提高;随着膨润土用量的增加,共絮聚团的平均弦长在不断增大,细小组分的留着在不断增大。

Polar P-RC APMP pulp was chosen as raw materials for fines generation and collecting, then the P-RC APMP fines and calcium carbonate were co-flocculated before they added into standard fiber fraction to make fine paper. Effects of different dosage of CPAM on the co-flocculation of fines-calcium and the electric of slurry, the size of co-flocculation, the retention of fines, the size and distribution of co-flocculation and the retention were studied under the CPAM/bentunite system. The results showed that with the increasing dosage of CPAM, the negative surface charge of fines-calcium and the Zeta potential of pulp are decreased, the retention of fines are increased. With the increasing dosage of bentonite, the average chord length of the co-flocculation and retention are increased.