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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Flocculation of PCC filler in papermaking:Influence of the particle characteristics
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Flocculation of PCC filler in papermaking:Influence of the particle characteristics

机译：絮凝的PCC填料造纸:粒子的影响特征

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摘要

The influence of precipitated calcium carbonate(PCC)characteristics on the flocculation process and floes structure was investigated in the presence of a linear,high molecular weight,cationic polyaciylamide of high charge density.For that,a commercial PCC sample was used,either as supplied(original PCC)or after a washing process(treated PCC).The PCC samples were characterised,and the flocculation process,for different flocculant concentrations,was monitored using the light diffraction scattering technique(LDS).Floes structure was evaluated by determining the mass fractal dimension of the floes.It was found that the particle size of the original PCC was larger than that of the PCC submitted to the cleaning process.As a consequence,the optimum flocculant dosage was lower for the original PCC than for the treated PCC.Despite the kinetics of flocculation being independent of the differences in the PCC samples,the floes compactness at the end of flocculation was higher in the case of the original PCC,resulting in more resistant floes to shearing.The results showed that the PCC characteristics affect mainly the optimum flocculant dosage,the floes structure and,thus,the floes resistance and their reflocculation capability.
机译：沉淀钙的影响碳酸钙(PCC)絮凝特性过程和浮冰结构研究存在一个线性高分子重量,高电荷的阳离子polyaciylamide密度。使用,无论是原始(PCC)或之后提供洗涤过程(PCC)治疗。特征,和絮凝过程不同絮凝剂浓度监测使用光衍射散射技术(像)。确定的质量分形维数浮冰。最初的PCC是比新闻申诉委员会提交给清洗过程。因此,最佳絮凝剂用量原来的PCC低于治疗PCC。独立的新闻申诉委员会的差异样品,浮冰的密实度絮凝是更高的原始PCC,导致抗浮冰剪切。主要影响最优的特征絮凝剂用量,浮冰结构因此,浮冰阻力和他们reflocculation能力。

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