改性甲壳质赤泥絮凝剂的合成、结构与絮凝机理的研究

Polymers man-made has been applied in the process of Al2O3 production as a flocculant of seperation of solid-liguid. Homever, it is difficult to biodecomposite for the polymers that are of toxicity.Therefore, it is of benefit to research natural, biodecomposable and nonpoisonous polymers as a flocculant. Chitosan is a nature polymer flocculant and mainly made of shrimp and crab shells. The chitosan resource is abundant and its price is getting cheaper. The utilization of Chitosan as a red mud flocculant of sintering process is researched. The flocculating ability of chitosan is compared with industrial flocculant A-2000 and PAS-1. Experiment result suggests that chitosan do have flocculating ability as red mud flocculant. The optimum addition quantity of chitosan is 0.025% of dry red mud, The average settling velocity of the first two minutes is 6.85cm.min-1. The placement of chitosan liquid for 30 hours don't influence the flocculating greatly. Modifying chitosan，researching appropriate water-soluable chitosan as red mud flocculant should be the main focus of the future research work. It will have great influence on the alumina industry.

针对我国氧化铝生产中赤泥絮凝剂存在问题，提出了将天然高分子甲壳质进行化学改性，制备以甲壳质为基含有氧肟官能团的新型高效赤泥絮凝剂的新思路。利用现代手段系统地研考卓侵食嗄嘈跄粒ㄈ玺燃谆蔷厶呛脱蹼考卓侵剩┑暮铣桑铣商跫虢峁埂⒆槌傻墓叵担约敖峁棺槌啥猿嗄嘈跄挠跋欤沂炯卓侵驶跄炼猿嗄嗟男跄砗托跄ρЧ媛伞Ｎ夜趸辽谐嗄嘈跄恋难兄坪图卓侵首试吹淖酆侠每⒘艘桓鲂峦揪叮蚨