黑龙江科技大学学报Issue(5)：469-475,7.DOI:10.3969/j.issn.2095-7262.2015.05.002
阳离子型絮凝剂C-SS-g-AM合成及煤泥水沉降实验研究
Synthesis of cationic flocculant C-SS-g-AM and test of coal slurry sedimentation
摘要
Abstract
This paper is geared towards a study addressing the notorious settlement of the coal slurry. This study does so by analyzing the effects of Ce+4 concentration, the molar ratio of S2 O8-2 to Ce+4 , the mass ratio of soluble starch to acrylamide monomer on conversion rate and the graft yield, as is seen in“one-step”synthesis of cationic natural polymer flocculating agent C-SS-g-AM;analyzing the influence of the dosage of flocculant on the settlement of coal slurry on the basis of flocculation sedimentation experi-ment;and observing the reaction process of flocculant molecules and suspended particles in coal slime water. The results show that, as is the case of flocculation sedimentation and floc analysis experiments, flocculant molecules starts by adsorbing negatively charged particles by electrostatic interaction in slime water to destroy double layer stable structure and thereby sweeping the large suspended particles in coal slurry, by forming the network structure by molecular cross-linking. Excessive addition of medicament likely leads to an increase in the interaction probability among molecular chain functional groups, thus af-fecting the adsorption of fine particles and resulting in too large a volume of floc and the increased thick-ness of the compressed layer. The highest conversion rate and graft yield of 102. 10% and 289. 70% are possible with the Ce+4 concentration of 4. 5 × 10 -3 mol/L, the S2 O8-2 to Ce+4 molar ratio of 2. 5∶1, and the soluble starch to acrylamide monomer mass ratio of 1∶2 . 5 .关键词
阳离子型/天然高分子/絮凝剂/煤泥水/沉降Key words
cationoid/natural polymer/flocculant/coal slurry/sedimentation分类
矿业与冶金引用本文复制引用
吕一波,张乃旭,蒋振东,刘亚星..阳离子型絮凝剂C-SS-g-AM合成及煤泥水沉降实验研究[J].黑龙江科技大学学报,2015,(5):469-475,7.基金项目
黑龙江省普通高等学校矿物加工重点实验室开放课题资助项目(2014kf1203) （2014kf1203）
