Utilization of starch graft copolymers as selective depressants for lizardite in the flotation of pentlandite
Utilization of starch graft copolymers as selective depressants for lizardite in the flotation of pentlandite
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DOI：
10.1016/j.apsusc.2015.02.063
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发表时间：
2015-05-15
影响因子：
6.7
通讯作者：
Cheng, Shao-Yi
中科院分区：
文献类型：
--
作者：
Cao, Jian;Luo, Yong-Chun;Cheng, Shao-Yi
本文研究了蜥蜴石表面特征对镍黄铁矿浮选的不利影响。为了减少这种影响，合成了两种不同的淀粉接枝共聚物，淀粉-接枝-聚丙烯酰胺（S-g-PAM）和淀粉-接枝-聚丙烯酸（S-g-PAA）作为蜥蜴石的抑制剂。浮选结果表明，在常规浮选蜥蜴石和镍黄铁矿的pH值为8时，与传统抑制剂羧甲基纤维素（CMC）相比，S-g-PAM和S-g-PAA可以有效提高镍黄铁矿的回收率。实验结果表明，S-g-PAM和S-g-PAA将亲水性蜥蜴石颗粒从镍黄铁矿表面分散，并且使蜥蜴石颗粒絮凝。 (C) 2015 年由 Elsevier B.V. 出版
This paper investigates the detrimental effect of lizardite surface characteristics on pentlandite flotation. To reduce the effect, two different starch graft copolymers, starch-graft-polyacrylamide (S-g-PAM) and starch-graft-polyacrylic acid (S-g-PAA) were synthesized as depressants for lizardite. The flotation results show that at pH value of 8, where the flotation of lizardite and pentlandite are routinely performed, S-g-PAM and S-g-PAA improve pentlandite recovery efficiently, compared with the traditional depressant carboxymethyl cellulose (CMC). Experimental results demonstrate that S-g-PAM and S-g-PAA disperse the hydrophilic lizardite particles from the pentlandite surface and also flocculate lizardite particles. (C) 2015 Published by Elsevier B.V.