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本研究使用光电浊度法,扫描电镜和显微电泳仪等试验手段,研究了微粒菱锰矿与石英、方解石的互凝行为和机理及分散剂阻止矿物间互凝的作用和机理。研究阐明了六偏磷酸钠的分散作用机理是:以空间(位阻)效应导致的排斥作用为主,增加粒子表面负电性从而加大静电排斥力为辅,两者同时作用,导致微细粒矿物悬浮体处于分散状态。从而解释了六偏磷酸钠在作分散剂时,与其它分散剂相比,用量很小而分散能力很强的原因。
In this study, using the optoelectronic turbidity method, scanning electron microscopy and microscopic electrophoresis and other experimental methods to study the intermixing behavior and mechanism of the microparticulate rhodochrosite and quartz, calcite and the role and mechanism of the dispersant to prevent the inter-mineral coagulation. The research shows that the mechanism of dispersion of sodium hexametaphosphate is that the repulsive effect caused by steric (steric) effect is dominant, and the negative repulsive force is increased by increasing the negative charge on the surface of the particles, resulting in the simultaneous action of the fine particles of minerals Suspension in a dispersed state. This explains the reason why sodium hexametaphosphate is used as a dispersant in a small amount and dispersible in comparison with other dispersants.