ABSTRACT

This type of fly ash is difficult to float even at a higher concentration of collector due to less dispersion of the collector molecules on the surface. Emulsification of kerosene in the presence of Sodium Dodecyl Sulfate (SDS) dramatically reduces the size of the kerosene droplets. The results showed that much less collector was required to achieve a good separation of carbon from fly ash when SDS was employed in conjunction with the collector. In this paper, the influence of the concentration of emulsifier on flotation was discussed. The emulsifier concentration of 0.2 kg/t produced the superior performance of LOI of 54.5% and the corresponding CR of 93.1%. The contact angle and attachment efficiency of CFA after pretreatment were found to be increased. The results of XRD and SEM demonstrate that a complete separation of unburned carbon from CFA could be achieved by using the emulsifier.

摘要

由于捕收剂分子在表面的分散较少，这种类型的粉煤灰即使在捕收剂浓度较高的情况下也难以漂浮。在十二烷基硫酸钠 (SDS) 存在下的煤油乳化显着减小了煤油液滴的尺寸。结果表明，当 SDS 与捕收剂结合使用时，实现碳与飞灰的良好分离所需的捕收剂要少得多。本文讨论了乳化剂浓度对浮选的影响。0.2 kg/t 的乳化剂浓度产生了 54.5% 的 LOI 和 93.1% 的相应 CR 的优越性能。发现预处理后CFA的接触角和附着效率增加。