水体磁化参数对飞灰中锌的浮选去除效果的影响规律及其模型

为掌握磁化水体系下浮选去除生活垃圾焚烧飞灰中锌的影响规律,采用正交试验进行了磁化水体系下浮选去除飞灰中锌的研究,在此基础上利用正交多项式回归分析方法建立了磁化水体系下浮选去除飞灰中锌的数学模型。结果表明,线圈匝数对飞灰中锌的去除率的影响作用显著。在磁化时间为25min、电流频率为48 kHz、线圈匝数为90圈、波形为三角波的条件下采用一次粗选的流程可获得69.536%的锌去除率,指标较为理想。磁化水中浮选去除锌的数学模型为 = -0.2825X_D+94.821。在设定的条件范围内,该模型对飞灰中锌的去除率的预测值与试验结果的误差在±3.94%之间,准确性较高,对现场的生产调试具有一定的指导意义。

Effect and Model of Magnetization Parameters on Flotation Removal of Zinc from Fly Ash

To improve the removal efficiency of heavy metal zinc from MSWI fly ash by flotation under alternating magnetic field, orthogonal test and regression analysis were used to investigate the influence of different conditions on the zinc removal rate obtained by flotation under alternating magnetic field. On this basis, a mathematical model of flotation removal of zinc minerals in magnetized water system was established. The results showed that the number of coil turns has significant effects on the zinc removal rate. The highest zinc removal rate was 69.536% under the conditions of magnetization time of 25min, current frequency of 48 kHz, coil number of turns of 90, and waveform of triangular wave. And the mathematical model of zinc removal rate obtained by flotation was = -0.2825XD+94.821. Moreover, the error between the predicted value of the model and the test results was between ±3.94%, which shows that the mathematical model has a high accuracy. So it can provide a theoretical basis for field commissioning and production.