Activation and Collector Adsorption in Quartz-albite Flotation System
The separation of albites from quartz by flotation applying the conventional HF-methods is no longer acceptable from an environmental and health point of view. Therefore, the search for a new reagent scheme without using HF depressor for separation of albite from quartz is under consideration.The flotation behaviour of ore mineral components depends on the produced hydrophobic or hydrophilic surface coverage (chemical functionalization). Currently we have excellent possibility of monitoring surface composition and structure at molecular and atomic levels at surfaces of natural minerals contacted with aqueous solutions of collectors, activators, depressants which is vitally important for the understanding of the surface chemistry that govern selective and efficient flotation.Detailed surface characterization of minerals before and after their exposition to different solution conditions was performed by the most modern spectroscopic techniques such as developed by us the infrared external reflection technique combined with spectral simulation and X-ray photoelectron spectroscopy (XPS). It is possible to monitor surface reactions which facilitate the separation process and those which bring disadvantage to selective flotation.At first we found that a small amount of mineral impurity presented in natural ore could play important role in selective hydrophobization process. It was found that the pH of solution (parameter possible to control) and natural mineral impurities present in mineral samples (parameter related to ore origin) play a very important role in the separation process. Another important parameter is interaction between minerals, quartz and albite, present in aqueous solution. The limitation of flotation separation resulting from chemistry will be discussed. Moreover, the most promising scheme for separation of albites from quartz will be examined.
Quartz Feldspar Activation Surface analysis Infrared spectroscopy XPS Selective functionalization
Jerzy A. Mielczarski Ela Mielczarski
Laboratoire Envirormement et Min(e)ralurgie, France Laboratoire Envirormement et Min(e)ralurgie , France
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
993-999
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）