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常规工业浮选实践中以油酸盐为捕收剂 ,从白云母、长石、石英等伟晶岩铝硅酸盐矿物中选择性浮选分离锂辉石时 ,锂辉石表面晶体化学特性是产生选择性分离的决定性因素。晶体学研究认为 ,锂辉石 {110 }解理面上的Al晶格质点是油酸盐选择性化学吸附的最佳质点 ,而其他伟晶岩铝硅酸盐矿物的Al则位于晶胞内部 ,导致油酸盐不能对其吸附。由于晶面的不同 ,任何一种矿物特定表面上都含有许多不同的表面原子晶格质点 ,并且这些表面原子带有不同的断裂化学键。矿物存在的不同类型的晶格缺陷 ,或者本身固有的各向异性的晶体结构 ,都会导致矿物表面的不均一性。要正确理解矿物 -捕收剂体系中的矿物表面电性、润湿性、捕收剂的吸附等一系列矿物表面化学性质 ,必须考虑到矿物特定的表面原子晶格质点。本文研究了油酸盐 -锂辉石浮选体系的各种表面化学性质 ,内容包括 :油酸盐捕收剂溶液化学、锂辉石 -水体系溶液化学以及酸碱处理对锂辉石各种表面化学性质的影响。研究方法包括 :X射线光电子能谱、电泳、油酸盐吸附研究、红外光谱、接触角测量和哈里蒙德管浮选试验等。研究结果表明 ,当pH 8时 ,从其它铝硅酸盐矿物中浮选锂辉石可获得最佳的分离效果 ,此时锂辉石表面荷负电 ,油酸盐阴离子捕收剂与矿物表面Al晶格质点发生?
In the conventional industrial flotation practice, oleate is used as a collector to selectively crystallize spodumene from pegmatite and other pegmatite minerals such as muscovite, feldspar, and quartz to reveal the crystallographic characteristics of spodumene It is the decisive factor that causes selective separation. Crystallographic studies suggest that the Al lattice sites on the cleaved surface of the {110} spodumene are the best sites for the selective chemisorption of oleate, while the Al of other pegmatite aluminosilicates are located inside the unit cell , Resulting in oleate can not be adsorbed. Due to the different crystal planes, any one of the mineral-specific surfaces contains many different surface atomic lattice particles, and these surface atoms have different breaking chemical bonds. The different types of lattice defects that exist in minerals, or inherently anisotropic crystal structures, can lead to inhomogeneous mineral surfaces. To correctly understand the surface properties of minerals in minerals - collector system, wettability, collector and a series of mineral surface chemical adsorption properties, we must take into account the mineral surface-specific lattice elements of the surface. In this paper, various surface chemical properties of the oleate-spodumene flotation system were studied. The contents include: solution chemistry of oleate collector, solution chemistry of spodumene-water system, Effect of surface chemistry. Research methods include: X-ray photoelectron spectroscopy, electrophoresis, oleate adsorption studies, infrared spectroscopy, contact angle measurement and Harmonic tube flotation test. The results show that when pH 8, flotation of spodumene from other aluminosilicate minerals can obtain the best separation effect. At this time, the surface of the spodumene is charged negatively, and the interaction between the oleate anion collector and the mineral surface Al Lattice point occurred?