Selective flotation of scheelite from calcite using a novel self-assembled collector
Selective flotation of scheelite from calcite using a novel self-assembled collector
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使用新型自组装捕收剂从方解石中选择性浮选白钨矿
DOI：
10.1016/j.mineng.2021.107120
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发表时间：
2021-09
影响因子：
4.8
通讯作者：
Gao Zhiyong
中科院分区：
文献类型：
--
作者：
Wang Cong;Ren Shuai;Sun Wei;Wu Sihui;Tao Liming;Duan Yao;Wang Jianjun;Gao Zhiyong
白钨矿和方解石都是含钙矿物，由于表面性质相似，泡沫浮选不能很好地分离它们。到目前为止，还没有报道表明仅使用捕收剂(包括传统的NaOL和选择性的铅-BHA络合物)就可以很好地分离白钨矿和方解石。因此，本研究首次采用硝酸铅、苯甲酸异羟肟酸、油酸钠及其特定结合物(铅-BHA-NaOL)组成一种新型捕收剂来选择性分离白钨矿和方解石。单矿物和二元混合矿物的浮选结果表明，在pH值为9.0时，铅、BHA和NaOL(摩尔比为6：6：1)对白钨矿和方解石表现出良好的分离选择性。Zeta电位测量表明，铅-BHA-NaOL的优势物种是带正电的，在带负电的白钨矿表面有较强的吸附。红外光谱和X-射线光电子能谱进一步表明，PbbHANaOL与钙原子以Pb(OH)-bHAOL−形式存在较强的化学相互作用，特别是与白钨上的氧原子以PbbHa+的形式相互作用，而与方解石上的氧原子没有相互作用。因此，本文提出的新型捕收剂可以为其他新型捕收剂的设计提供有意义的指导，在白钨浮选中具有潜在的应用前景。
Both being Ca-bearing minerals, scheelite and calcite cannot be well separated by froth flotation due to their similar surface properties. To date, there is no report that scheelite and calcite can be well separated using collectors alone (including traditional NaOL and selective Pb-BHA complexes). Therefore, in this study, Pb(NO3)2, benzohydroxamic acid, and sodium oleate with specific combination (Pb-BHA-NaOL) were firstly used to form a novel collector to selectively separate scheelite and calcite. The flotation results of single and binary mixed minerals showed that the mixture of Pb, BHA and NaOL (molar ratio 6:6:1) exhibited excellent separation selectivity for scheelite and calcite at pH 9.0. Zeta potential measurements indicated that the dominant species of Pb-BHA-NaOL were positively charged and had stronger adsorption on negatively charged scheelite surfaces. Infrared spectroscopy and X-ray photoelectron spectroscopy further showed that Pb-BHA-NaOL had strong chemical interaction with Ca sites in the form of Pb(OH)-BHA-OL−, especially with O sites in the form of Pb-BHA+on scheelite, but had no interaction with O sites on calcite. Therefore, the novel collector proposed in this work can provide a meaningful guide for the design of other novel collectors and have potential application prospects in scheelite flotation.
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影响因子：
9.9
作者：
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通讯作者：
K. Rao;J. Cases;K. Forssberg
以季铵盐为捕收剂浮选分离白钨矿和方解石
影响因子：
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DOI：
10.1016/s1003-6326(14)63515-9
发表时间：
2014-11
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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