改性淀粉-TiO_2体系对含不同填料的脱墨浆助留助滤效果研究

The Retention and Drainage of DIP Containing Different Fillers and the Nanosized TiO_2 and Modified Starch Dual-system

改性淀粉-TiO2体系作为助留助滤剂通过与含不同填料的脱墨浆作用,考察对浆料和填料的助留助滤效果。实验结果表明,改性淀粉-TiO2体系对浆料的留着以滑石粉为填料时最好,当两性淀粉(AmS)用量为0.4%、纳米TiO2用量为0.2%时,滑石粉为填料时总留着率达到91.8%,滑石粉留着率为94.3%;高岭土为填料时总留着率为87.8%,高岭土留着率为90.3%;钛白粉为填料时总留着率为87.3%,钛白粉留着率为91.1%;碳酸钙为填料时总留着率为81.4%,碳酸钙留着率为69.5%;滤水时间则是碳酸钙为填料时最少,为20 s,其次分别是滑石粉33 s、钛白粉48 s、高岭土53 s。

The retention and drainage of the DIP containing different fillers and the modified starch-TiO2 dual system were investigated in the paper.The results showed that when the dosages of nanosized TiO2 and AmS were 0.20% and 0.4%,respectively,the retention rate of the DIP furnish containing the filler of talc was 91.8%,the retention rate of the talc was 94.3%,retention rates of DIP furnishes containing the fillers of kaolin,titanium dioxide and calcium carbonate were 87.8%,87.3% and 81.4%,respectively,the retention rates of the kaolin,titanium dioxide and calcium carbonate were 90.3%,91.1% and 69.5% respectively.The drainage time of the DIP furnishes containing fillers calcium carbonate,talc,titanium dioxide and kaolin were respectively 20 s,33 s,48 s and 53 s.This mainly ascribe to the different crystal structures of the fillers.