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Sun J.-M.,Datang International High Alumina Coal R and nter | Sun J.-M.,State Key Laboratory of Development and Utilization of High Alumina Coal | Wang C.-H.,Datang International High Alumina Coal R and nter | Wang C.-H.,State Key Laboratory of Development and Utilization of High Alumina Coal | And 9 more authors.
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2014

The porous calcium silicate prepared from fly ash has characteristics of lower density (true density 1.1~1.3 g/cm3), higher bulk volume (bulk density 0.17~0.3 g/cm3), higher porosity (specific surface area 160~400 m2/g) and strong adsorption capacity. Research results showed that ash content of the paper increased from original 22.0% to 29.7% when the talc was used as the filler and the dosage of 5% of porous calcium silicate was added, indicating that porous calcium silicate was able to improve the retention of talc significantly. In addition, the study also showed that pore-effect, hydroxyl-effect and nano-effect of the porous calcium silicate appeared in papermaking system were the main reasons leading to significant adsorption and retention functions.

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