改性淀粉-TiO2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 TiO2 and Modified Starch Dual-system

关键词:  改性淀粉-TiO₂体系  填料  助留助滤  纳米TiO₂

Key Words:modified starch-TiO₂ system  filler  retention and drainage  nanosized TiO₂

摘要: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。

Abstract: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.