ABSTRACT

Various studies have reported that electrolytes present in the plant’s process water influence the coal flotation performance. However, coal fines, which are fed into the flotation circuit are from different coal seams, and their surface properties usually vary considerably. In this study, flotation experiments were conducted using coal fines from three different coal seams of the West Bokaro coalfield in plant’s process water to explore the extent of change in flotation response of each coal. Besides, flotation experiments using deionized water were parallelly examined for comparison. XRD, SEM, FTIR, BET, contact angle, wetting rate, and zeta potential measurements were performed to understand and compare the surface properties of three coals. The flotation results indicated that compared to deionized water, process water increased flotation yield, combustible recovery as well as ash recovery for all three coals at all examined collector dosages.

摘要

各种研究报告称，工厂工艺用水中存在的电解质会影响煤浮选性能。然而，进入浮选回路的煤粉来自不同的煤层，它们的表面性质通常差异很大。在这项研究中，使用来自 West Bokaro 煤田三个不同煤层的煤粉在工厂工艺用水中进行了浮选实验，以探索每种煤的浮选响应的变化程度。此外，还平行检查了使用去离子水的浮选实验以进行比较。进行了 XRD、SEM、FTIR、BET、接触角、润湿速率和 zeta 电位测量，以了解和比较三种煤的表面性质。浮选结果表明，与去离子水相比，