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铝土矿选洗矿泥混凝沉降试验及机理研究 韦桥权.pdf

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铝土矿选洗矿泥混凝沉降试验及机理研究 韦桥权.pdf

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金属矿山
粒径变小,沉降效果较差,PAC 或 PFC 不适合作为该铝土矿矿泥的混
凝剂;阴离子型聚丙烯酰***(APAM)主要利用极性基团—CONH2 与矿泥中的高岭石和一水硬铝石发生氢键作用,
矿泥混凝沉降效果明显,适宜投加量为 40~60 g/t,最佳投加量为 60 g/t;非离子型聚丙烯酰***(NPAM)主要利用
大分子链缠绕包裹作用,矿泥混凝沉降效果较明显,适宜投加量为 50~70 g/t,最佳投加量为 70 g/t;阳离子型聚丙
烯酰***(CPAM)主要利用静电吸附作用对矿泥颗粒进行吸附,矿泥混凝沉降效果一般,适宜投加量为 60~80 g/t,
最佳投加量为 80 g/t。
关键词 铝土矿矿泥 沉降特性 pH 值 Zeta 电位分析 电导率分析 粒径分布 FTIR 分析
中图分类号 X751 文献标志码 A

Experimental and Mechanism Research on Coagulation Settlement of Bauxite Ore Dressing
Slime
WEI Qiaoquan1 CHENG Guanwen1 ZHANG Yuling1 ZHANG Zhenglin2 HUANG Zhenyi2
NONG Guowu2
(1. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;
(2. Guangxi Branch of Aluminum Corporation of China Limited, Pingguo 531400, China)
Abstract Bauxite ore dressing slime has the characteristics of small particles, negatively charged, fluid state and pH
of weakly alkaline, which is difficult to settle naturally. In order to improve the coagulation and settlement effect of the
slime, take the slime produced in the third stage of Pingguo Aluminum as the research object, investigate the coagulation
and settling performance of polyaluminum aluminum chloride (PAC), polyaluminum ferric chloride (PFC) and
polyacrylamide (PAM) on the slime, and study their mechanism of action. The results showed that the addition of PAC or
PFC makes the pH of the slime system decrease, the conductivity increases, the Zeta potential of th