CCTEG Beijing Huayu Engineering Co. , Ltd.
Anhui University of Science and Technology

捕收剂油滴与煤泥颗粒的有效碰撞粘附是提高浮选效率的重要前提。为了研究能量输入对油滴-煤泥颗粒吸附率的影响,采用改进式浮选机及单煤油液滴-煤泥颗粒碰撞试验系统,分析了不同能量输入因素下捕收剂动能的改变及其对药剂-煤泥吸附率的作用。结果表明:随着搅拌时间的增加,能量输入持续增多,捕收剂-煤泥吸附率随之增大,达到临界值后逐渐减小,这是由于煤油与颗粒之间的吸附作用属于物理吸附,当二者的吸附逐渐达到饱和状态后,能量持续输入打破了吸附平衡,使吸附的油滴发生脱附,最大吸附率为79.82%,对应搅拌时间为40s。改变叶轮转速,捕收剂动能也随之改变,随着颗粒和药剂分散度逐渐增大,碰撞概率随之增大,吸附率逐渐提高,当叶轮转速由500r/min增大至700r/min时,捕收剂-煤泥吸附率由78.11%增大至79.82%。研究结果从多个可变因素角度出发探究了能量输入对捕收剂油滴-煤泥吸附率的影响,为揭示煤泥调浆机制与开发调控技术提供理论参考。

Effective collision and adhesion between collector oil droplets and coal slime particles is an important prerequisite for improving flotation efficiency. An improved flotation machine and a single kerosene droplet-slime particle collision test system is used to analyze the change of collector kinetic energy under different energy input factors and its impact on the collector-slime adsorption rate. With the increase of mixing time and energy input, the adsorption rate firstly increases to the maximum then gradually decreases as it is a physical process. When it progressively reaches the saturation state, the dynamic balance of adsorption and desorption is broken with the continuous input of energy. Which will pull the adsorbed kerosene desorb again, resulting in the decrease in adsorption rate, the maximum adsorption rate is 79. 82%, under the s mixing time. The change of impeller speed also changes the kinetic energy of the collectors. As the dispersion of particles and reagents increases, the collision probability increases and the adsorption rate increases. When the impeller speed increases from r/ min to r/ min, the collector-slime adsorption rate increases from 78. 11% to 79. 82%. This research results explore the influence of collector kinetic energy on the adsorption rate from the perspective of multiple variable factors. Which can provide theoretical reference for the influence of collector kinetic energy on the mechanism of slime slurry mixing.

赵兵兵,何海陵,郑继洪,等.能量输入对捕收剂-煤泥颗粒吸附率的影响研究[J].煤炭工程,2024,56(4):185-191.