能量输入对低阶煤泥浮选的影响

Influence of input energy on flotation of low-rank coal slime

为探究能量输入对低阶煤泥浮选的影响,设计了浮选机转速分别为1 500、1 800、2 100、2 400以及2 700 r/min的浮选速度试验,分析了能量输入与浮选指标的关系,研究了能量输入对浮选动力学过程的影响。结果表明:合适的能量输入对低阶煤泥浮选意义重大,过高或过低的能量输入都不利于浮选的进行;利用MATLAB软件对试验数据拟合,在中低能量输入条件下,一级矩阵模型对各个浮选过程的拟合度最高,但在转速为2 400和2 700 r/min高能量输入下,经典一级动力学方程是本试验煤样浮选过程的最佳模型。

In order to explore the influence of input energy on flotation of low-rank coal slime, after designing the test in which the flotator velocity was respectively set as 1 500, 1 800 and 2 100 r/min, the paper analyzed the relationship between input energy and flotation indexes, and studied the influence of input energy on dynamic process of flotation. The results showed： suitable input energy possessed significance for the flotation of low-rank coal slime, higher or lower input energy was not contributive to the flotation; MATLAB was applied to fit the test data, the one-order rectangular model had the highest fitness for each flotation process at low or middle input energy, while at high input energy of 2 400 and 2 700 r/min, the typical one-order dynamic equation was the optimal model of the flotation of the test sample.