Application of Water-Soluble Polymer in Dewatering of Fine Coal

The addition of water-soluble polymer to a fine coal slurry to enhance dewatering process is considered to be one of the most effective ways of solving the problems of dewatering of fine coal. A series of tests are conducted with a vacuum dewatering apparatus to study the effects of various factors such as the species of polymer, polymer dosage and its ways of addition, and the pH of fine coal slurry on filtrating and dewatering of fine coal.

煤气化细渣基聚合硅酸铝铁絮凝剂的制备与性能研究

综合利用煤气化细渣的天然成份(富含Si、Al、Fe、Ca),以酸浸+碱溶方法制备新型聚合硅酸铝铁絮凝剂(PSAFC),在优化制备条件的基础上,采用X射线荧光光谱仪(XRF)、X射线衍射(XRD)和傅里叶变换红外光谱(FT-IR)对PSAFC进行了表征,证明PSAFC是由Si、Al、Fe、Ca等元素聚合而成非晶相、无定形的高分子无机絮凝剂。同时,以高岭土悬浊液为研究对象,对PSAFC絮凝性能进行了研究。结果表明:当PSAFC质量浓度为50 mg/L,pH为10时,高岭土悬浊液初始浊度低于1439 NTU时,PSAFC对其均具有较好的絮凝性能,浊度去除率均可达95%以上。该研究可为煤气化细渣的综合利用与高分子无机絮凝剂的制备提供新的途径与方法。

PQAAM聚合物对细粒煤的助滤性能

研究了PQAAM聚合物对细粒煤的脱水助滤作用与机理.结果表明:PQAAM具有良好的吸附能力和絮凝能力,能够降低煤粒表面的负电性,提高煤粒表面的疏水性,促使微细粒煤形成疏水性絮团,从而降低滤饼水分,提高过滤效率。