低阶煤浮选动力学过程研究

发布时间：2019-04-03 16:41

【摘要】：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.
[Abstract]:In the light of the low-order coal with the difference of floatability, the flotation rate test of the new compound agent FO3 and diesel oil at the speed of 1 500,1 800,2 100,2 400 and 2 700 r/ min was designed, and the flotation rate constant of each flotation time period was calculated according to the classical first-order kinetic model. The fitting parameters of four traditional dynamic models to the test data are obtained by using the MATLAB software, and a new dynamic model for low-order coal flotation is put forward. The results show that, under the same dosage, FO3 can obtain the recovery rate of the combustible material above 20% of the diesel oil, the flotation rate constant of the flotation process with the function of the FO3 is large, the reaction rate is high, the classical first-order kinetic model and the first-order matrix distribution model are well fitted to the flotation process of the function of the FO3, The flotation process of diesel oil is closer to the first-order matrix distribution model and the second-level dynamic model. The new model has good applicability to the low-order coal flotation process, and the variance SSE is close to 0 and R-2 approaches to 1.
【作者单位】：中国矿业大学国家煤加工与洁净化工程技术研究中心;中国矿业大学化工学院;
【基金】：十二五国家科技支撑计划项目(2014BAB01B00) 高等学校学科创新引智计划项目(B12030)
【分类号】：TD923;TD94

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