有机絮凝剂HSPA分选一水硬铝石型铝土矿的机理

来源期刊:中国有色金属学报2006年第7期

论文作者:黄传兵 王毓华 兰叶

文章页码:1250 - 1256

关键词:一水硬铝石; 铝土矿; 选择性絮凝; 絮凝剂; 化学吸附

Key words:diaspore; bauxite; selective flocculation; flocculant; chemical absorption

摘    要:采用沉降试验方法, 以碳酸钠为分散剂, 有机物HSPA为选择性絮凝剂, 对一水硬铝石、 高岭石、 伊利石和叶蜡石单矿物, 以及实际矿石进行选择性絮凝分选实验。 结果表明, HSPA体现出良好的铝硅分离选择性。 对铝硅比为5.68的铝土矿, 在HSPA用量7 g/t, Na2CO3用量5 kg/t时, 经3次絮凝分离, 可获得精矿铝硅比为8.9, 氧化铝回收率为86.98%的良好指标。 机理测试结果分析表明, HSPA主要通过羧基与矿物表面Al3+活性点形成化学吸附, 并通过氢键形成桥键作用。

Abstract: The flocculation tests of diaspore, kaolinite, illite, pyrophyllite and bauxite ore were carried out by the sedimentation. The sodium carbonate and an organic flocculant HSPA were used as dispersant and flocculant, respectively. The results show that HSPA has a good selectivity for the flocculation separation of diasporic-bauxite. The concentrate with Al/Si 8.9 and the recovery of Al2O3 86.98% were obtained after triple sedimentation on the bauxite ore with Al/Si 5.68 by using sodium carbonate 5 kg/t and HSPA 7 g/t. The mechanism study shows that there is chemical absorption between HSPA and active Al3+ sites on the surface of the diaspore with carboxyl. At the same time, bridge-bonds of macromolecule are formed by hydrogen bond.

基金信息:国家重点基础研究发展计划资助项目

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 主办 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(湘)字第028号   湘ICP备09001153号