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针对可浮性差的低阶煤,设计了新型复配药剂FO3与柴油在浮选机转速为1 500,1 800,2 100,2 400和2 700r/min时的浮选速率试验,并依据经典一级动力学模型,计算出了各个浮选时间段的浮选速率常数.利用MATLAB软件得出了4种传统动力学模型对试验数据的拟合参数,并提出了适用于低阶煤浮选的新动力学模型.结果表明:在相同药剂量下,FO3能获得高于柴油20%左右的可燃体回收率;FO3作用的浮选过程浮选速率常数大,反应速率快;经典一级动力学模型和一级矩阵分布模型对FO3作用的浮选过程拟合较好,柴油作用的浮选过程更接近一级矩阵分布模型和二级动力学模型;新模型对低阶煤浮选过程有很好的适用性,和方差SSE均接近于0,R~2均趋近于1.
Aiming at low rank coal with poor floatability, a new type of compounding agent FO3 and diesel was designed to test the flotation rate of flotation machine at the rotating speed of 1 500, 1 800, 2 100, 2400 and 2 700 r / min, First-order kinetic model was used to calculate the flotation rate constants for each flotation period.The fitting parameters of the four traditional kinetic models to the experimental data were obtained using MATLAB software, and the flotation rate constants suitable for low rank coal flotation The results showed that the FO3 could recover more than 20% of the combustibles from diesel at the same dosage, the flotation rate constant and the reaction rate of the FO3 flotation were high, The model and the first-order matrix distribution model fit well to the flotation process of FO3. The flotation process of diesel effect is closer to the first-order matrix distribution model and the second-order kinetic model. Good applicability, and SSE of the variance are close to 0, R ~ 2 are close to 1.