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Application of Porous Calcium Silicate as Retention Aid and the Mechanism Analysis
  
DOI：10.11980/j.issn.0254-508X.2014.09.001
Key Words:porous calcium silicate  retention aid  bulk  mechanism
Fund Project:本项目受内蒙古自治区重大自然基金项目资助（项目编号：2012ZD0F）。
Author NameAffiliation
孙俊民1，2 1.大唐国际高铝煤炭研发中心，内蒙古呼和浩特，010050；2.国家能源高铝煤炭开发利用重点实验室，内蒙古呼和浩特，010050 
王成海1，2，* 1.大唐国际高铝煤炭研发中心，内蒙古呼和浩特，010050；2.国家能源高铝煤炭开发利用重点实验室，内蒙古呼和浩特，010050 
张战军1，2 1.大唐国际高铝煤炭研发中心，内蒙古呼和浩特，010050；2.国家能源高铝煤炭开发利用重点实验室，内蒙古呼和浩特，010050 
宋宝祥3 3.中国制浆造纸研究院，北京，100102 
魏晓芬1,2 1.大唐国际高铝煤炭研发中心，内蒙古呼和浩特，010050；2.国家能源高铝煤炭开发利用重点实验室，内蒙古呼和浩特，010050 
陈　杨1,2 1.大唐国际高铝煤炭研发中心，内蒙古呼和浩特，010050；2.国家能源高铝煤炭开发利用重点实验室，内蒙古呼和浩特，010050 
徐　鹏1,2 1.大唐国际高铝煤炭研发中心，内蒙古呼和浩特，010050；2.国家能源高铝煤炭开发利用重点实验室，内蒙古呼和浩特，010050 
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Abstract: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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