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首页> 外文会议>XXI International Mineral Processing Congress >SPIN-MARKED REAGENTS IN FLOTATION
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SPIN-MARKED REAGENTS IN FLOTATION

机译：浮选中的自旋标记试剂

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Flotation and reagents interactions with surfaces of minerals were carried out using spin-labeled reagents and the ESR-method. The interaction products were identified as iminoxyl-xanthogenate and its dixanthogenide with sulfide minerals, based on the difference of the ESR-spectra of iminoxyl-xanthogenates in metals and iminoxyl-dixanthogenides in organic solvents in the presence of tetraethyltiuram disulfide (TETD). A formation of the diethylditiocarbamates Cu(II) and mixed disulfides was registered by the transformation of ESR spectrum from quintet to triplet. An analysis of the desorption products from the mineral surfaces and the study of the adsorption layers indicated that xanthogenate Cu was formed on chalcocite and dixanthogenide on pyrite. Xanthogenates of metals and dixanthogenides were formed on chalcopyrite, sphalerite, and antimonite surfaces that had previously been actuated by Cu. On galena, on the other hand, lead Xanthogenates were formed. In the thickest sorption layers of the galena a minimal distance between radicals 8.7 A was formed; 8.2 A was formed on the surface of molybdenite; and 8.7 A on pyrite. The rotating frequency of iminoxyl-2-dixanthogenide on chalcopyrite and molybdenite was lower than for butyl-xanthogenate and dixanthogenide sorbed on pyrite and quartz.
机译：使用自旋标记试剂和ESR方法进行浮选和试剂与矿物表面的相互作用。根据二乙基四铀二硫（TETD）的存在下金属在有机溶剂中亚胺氧基黄原酸酯和亚胺氧基二黄原酸酯的ESR光谱的差异，将相互作用产物鉴定为亚氨基氧基黄原酸酯及其与硫化物矿物的二黄原酸酯。通过将ESR光谱从五重体转变为三重体，记录了二乙基二氨基甲酸酯Cu（II）和混合二硫化物的形成。对矿物表面解吸产物的分析和对吸附层的研究表明，黄铁矿铜形成在辉绿矿上，而黄铁矿形成在黄铁矿上。金属和黄原铁化物的黄原酸酯在以前由铜激活的黄铜矿，闪锌矿和锑矿表面上形成。另一方面，在方铅矿上形成了黄原酸铅。在方铅矿最厚的吸附层中，自由基之间的最小距离为8.7 A; 8.2在辉钼矿的表面形成了A;在黄铁矿上为8.7A。亚氨基氧-2-二黄原化物在黄铜矿和辉钼矿上的旋转频率低于黄原酸丁二酯和二黄原化物在黄铁矿和石英上的吸附频率。

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