摘要
在煤泥浮选过程中,煤颗粒与药剂的碰撞黏附及其与气泡的矿化过程都是影响浮选效果的关键因素。通过应用湍流场中颗粒间的碰撞频率公式和颗粒在矿化过程中与气泡的碰撞概率、黏附概率、脱附概率公式以及相关的导出公式,从理论上探究了能量强度、煤泥粒度的变化对浮选过程的影响,并结合实验室试验验证了能量强度变化对各粒级煤泥药剂吸附量和浮选效果的影响。结果表明,能量强度的增加可以有效提高药剂在煤炭颗粒表面的吸附量,降低浮选粒度下限,提高煤泥的浮选效果;颗粒与气泡的矿化概率理论上随颗粒粒度的降低而升高,但当颗粒粒度太小时浮选效果会明显变差。
In coal slime flotation,both the contacting and adsorption between the reagents and coal particles,and the mineralization of particles and bubbles are the key influence factors. In this paper,the collision frequency formulas of particles in turbulent flow field,the formulas of the probability of collision,the probability of adhesion,the probability of stripping and the formulas which derived from the former ones were used to deduce the influence of energy intensity and size compositions on flotation process in theory. Laboratory tests were conducted to verify the influence of energy intensity on reagents adsorption and the flotation efficiency. The results showed that the increase of energy intensity could effectively increase the reagents adsorption of coal particle. In theory,the decrease of particles size could improve the mineralization probabilities of particles and bubbles,but extremely small size of the particles may worsen the flotation process. The increase of energy intensity could reduce the lower limit of particles size in flotation and effectively improve the flotation efficiency of fine coal particles.
出处
《矿业科学学报》
2018年第1期91-98,共8页
Journal of Mining Science and Technology
关键词
浮选
煤泥
能量强度
碰撞概率
flotation
coal slime
energy intensity
collision probability
