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经验的方法已经被用来解释氧化矿浮选中的胶体化学状态。本文用胶体化学的观点讨论了氧化矿的分离结果。硫化矿浮选厂的尾矿中含有重晶石。当往重晶石中加入烷基硫酸盐时,就会产生选择性絮凝.但当使用磺酸盐做捕收剂时,则不产生选择性絮凝。ζ-电位的测量表明用两种药剂都可以分散矿浆,选择性絮凝的差异应归结于两种捕收剂结构的不同。测量石英和长石的ζ-电位结果与浮选结果有内在联系。结论是象 Fe~(2+)这样的离子既影响ζ-电位,也影响分离效果。这些离子并不影响白云母,因为白云母的层状结构使其有一个不均匀的电荷分布。氢氟酸赋与长石很强的负ζ-电位,同时石英的ζ-电位仍不受影响。当石英接近零电点时就可获得最佳的分离效果。当用胺作捕收剂从方解石中浮选石英时,可以用水玻璃来改善浮选效果。当加入水玻璃后,方解石和石英的ζ-电位都变得更负。SiO_2 成份仅被少量地吸附在石英表面上,而水玻璃中的 SiO_2离子覆盖了方解石。由于与晶体石英的结构不同,方解石在浮选中受到抑制。
Empirical methods have been used to explain the colloidal chemistry in flotation of oxide ores. In this paper, the colloidal chemistry point of view of the separation of the oxide ore results. Sulfide flotation plant tailings contain barite. Selective flocculation occurs when alkyl sulfate is added to barite, but selective flocculation does not occur when sulfonate is used as a collector. The measurement of the zeta potential shows that the pulp can be dispersed with both agents and that the difference in selective flocculation is due to the difference in the structure of the two collectors. Measuring the zeta potential of quartz and feldspar is intrinsically linked to flotation results. The conclusion is that ions like Fe 2+ affect both the ζ-potential and the separation. These ions do not affect muscovite, because the lamellar structure of muscovite causes it to have an uneven charge distribution. Hydrofluoride imparts a strong negative ζ-potential to feldspar while the ζ-potential of quartz remains unaffected. When the quartz near zero point when you can get the best separation. When flotation of quartz from calcite using an amine as a collector, water glass can be used to improve flotation. The zeta potential of calcite and quartz becomes more negative when water glass is added. The SiO 2 component is adsorbed only to a small amount on the quartz surface, while the SiO 2 ions in the water glass cover the calcite. Calcite is suppressed in flotation due to its different structure from crystalline quartz.