CPAM／膨润土体系下细小纤维-碳酸钙共絮聚机理及强度的研究

The Research on the Mechanism and Strength of Co-flocculation of Fines-calcium Carbonate in the System of CPAM/bentonite

以杨木P-RC APMP为原料,对其进行筛分，并对P-RC APMP细小纤维与轻质碳酸钙进行共絮聚，研究了CPAM／膨润土微粒助留体系下，不同的CPAM添加量、膨润土用量及剪切力对细小纤维-碳酸钙共絮聚的影响；结果表明：随着CPAM用量的增加，细小纤维-轻质碳酸钙絮聚团的表面负电荷与浆料的Zeta电位绝对值都不断减小，细小组分的留着率不断增大；随着膨润土用量的增加，共絮聚团的平均弦长不断增大，细小组分的留着不断增大；随着剪切力的增大，细小纤维-轻质碳酸钙絮聚团的尺寸不断减小。

Polar P-RC APMP pulp was chosen as raw materials to be screened for fines generation and collecting. The P-RC APMP fines and precipitated calcium carbonate were co-flocculated. Effects of CPAM dosage, bentonite dosage and shear force on the co-flocculation of fines-calcium carbonate were studied under the CPAM/bentonite system. The results shows that with the increasing of CPAM dosage, the negative surface charge of fines-precipitated calcium carbonate and the absolute value of Zeta constantly. With the increasing of bentonite potential of pulp are decreased, dosage, the average chord length the retention of fines are increased of the co-flocculation and retention of fines are increased constantly. With the increasing of shear force, the size of fines-precipitated calcium carbonate is decreased.