A novel fly ash based calcium silicate paper filler: Its retention, drainage and particle size effects

作者：Shunxi, Song; Peiyao, Wang; Meiyun, Zhang; Qiumei, Li

来源：IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association , 2018, 30(2): 6-11.

• Drainage efficiency
• Ground calcium carbonates
• High surface area
• Large particle sizes
• Paper fillers
• Particle size effect
• Size effects
• Small particle size

A novel calcium silicate, the byproduct from the value added utilization of fly ash can be used as paper filler, which is known as fly ash based calcium silicate (FACS). Compared to common filler, original FACS has a large particle size (27.6μm), high surface area (121 m2/g) and honeycomb surface. Our previous study has showed that FACS has an advantage in the aspect of paper bulk improvement. In this paper, the wet-end behaviors of FACS with three particle sizes were investigated. The dynamic retention results showed that the filler retention of FACS with three particle size was higher than ground calcium carbonate (GCC) and the retention rate decreased as the particle size decreased without the addition of the retention aid. CPAM can improve the FACS retention remarkably, especially for the filler with small particle size. The drainage test showed that for a given addition, FACS with small particle size exhibited better drainage efficiency in absence of CPAM but the opposite results can be observed when CPAM was adopted. Unlike common fillers, the conductivity of FACS filled pulp was significantly higher than GCC filled pulp and the zeta potential of FACS was lower than GCC filler even though the CPAM was adopted as retention aid.

• 出版日期2018-6-1
• 单位华南理工大学