油酸钠浮选钼酸钙及其吸附行为.pdf

第23卷第10期
中国有色金属学报
2013年10月
The Chinese Journal of Nonferrous Metals
Oct.2013
文章编号:1004-0609(2013)10-2993-06
油酸钠浮选钼酸钙及其吸附行为
王振,刘润清2,孙伟2,徐龙华,刘若华2
(1.西南科技大学固体废物处理与资源化教育部重点实验室,绵阳621010
2.中南大学资源加工与生物工程学院,长沙410083)
摘要:通过浮选试验、接触角测定后矿物颗粒?着功的计算以及花荧光探针检测,考察捕收剂油酸钠对钼酸钙
及磷灰石的浮选性能。结果表明:在碱性条件下,两种矿物的浮选行为相似,浮选回收率均可达到80%以上,油
酸钠对钼酸钙和磷灰石有很好的捕收性能。六偏磷酸钠用量达到220mgL时,钼酸钙的回收率为62.5%,而此时
磷灰石的回收率仅有20.3%,两种矿物的可浮性差异显著增加。油酸钠可以显著增加两种矿物颗粒的黏着功,使
其更易向气泡粘附并上浮。六偏磷酸钠显著扩大两种矿物的表面疏水性差异,优化其浮选分离条件。油酸钠在钼
酸钙及磷灰石表面未形成胶束、半胶東吸附和非静电吸附,而是化学吸附。
关键词:镍钼矿;尾矿;钼酸钙;黏着功;能荧光探针;动电位
中图分类号:TD913
文献标志码:A
Flotation and adsorption behavior of sodium oleate on
calcium molybdate
WANG Zhen, LIU Run-qing, SUN Wei2, XU Long-hua, LIU Ruo-hua?
(1. Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education,
Southwest University of Science and Technology, Mianyang 621010, China;
2. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China)
Abstract: The flotation per ormance of sodium oleate(O )on powellite and apatite was investigated through flotation
tests, contact angle measurements, work of adhesion calculations and pyrene fluorescent probe detections. The results
show that the recovery of two minerals is more than 80% and their flotation behaviors are similar under alkaline
conditions. And SOL has good flotation performance on both powellite and apatite Sodium hexametaphosphate(SHMP)
decreases of flotation recovery of powellite and apatite at varying degrees, and the recovery of powellite and apatite are
62.5% and 20.3%, respectively, at SHMP dosage 220 m/L. SOL can significantly augment the work of adhesion of th
two kind of mineral grains, which make them much easier to be absorbed by bubbles and to rise with them. SHMP
enlarges dramatically the difference of hydrophobicity between apatite and powelite, which optimizes the flotation
paration conditions of two minerals. SOL absorbs on powellite and apatite by chemisorptions rather than micelle, alf
micelle adsorption or electrostatic adsorption
Key words: NI-MO ore; tailings powellite; work of adhesion; pyrene fluorescent probe; electrokinetic potential
铝是一种稀有金属,具有多种优质的功能。无论川、贵、陕、甘等省份,其矿带长度达1600km。镍
是钼的金属、合金还是化合物,都在电子、机械、军钼矿中的元素以钼为主,同时还伴生有元素镍,有时
事等多种现代行业中有广泛的应用リ。镍钼矿是一种还含有铁、砷、硒等杂质元素。这种镍钼矿分布广泛,
非传统矿物资源,主要存在于我国的湘、鄂、渝、黔、而且其中的镍、钼元素的含量很高,钼品位为2%~
基金项目:国家高技术研究发展计划资助项目(2007AAO62Z129)
收稿日期:2012-11-02;修订日期:2013-08-10
通信作者:孙伟,教授,博士;电话:13507310692:E-mail:sunmenghur②126.com