This study discussed the application of response surface methodology(RSM)and central composite rotatable design(CCRD)for modeling and optimization of the influence of some operating variables on the performance of a l...This study discussed the application of response surface methodology(RSM)and central composite rotatable design(CCRD)for modeling and optimization of the influence of some operating variables on the performance of a lab scale thickener for dewatering of tailing in the flotation circuit.Four thickener operating variables,namely feed flowrate,solid percent,flocculant dosage and feedwell height were changed during the tests based on CCRD.The ranges of values of the thickener variables used in the design were a feed flowrate of 9–21 L/min,solid percent of 8%–20%,flocculant dosage of 1.25–4.25 g/t and feedwell height of 16–26 cm.A total of 30 thickening tests were conducted using lab scale thickener on flotation tailing obtained from the Sarcheshmeh copper mine,Iran.The underflow solid percent and bed height were expressed as functions of four operating parameters of thickener.Predicted values were found to be in good agreement with experimental values(R2values of 0.992 and 0.997 for underflow solid percent and bed height,respectively).This study has shown that the RSM and CCRD could effciently be applied for the modeling of thickener for dewatering of flotation tailing.展开更多
为得到电Fenton技术深度处理煤化工废水的最优条件参数,采用电Fenton技术深度处理生物稳定的煤化工废水,利用正交试验、响应面法和中心复合试验设计对影响电Fenton处理效果的主要因素进行优化,建立二次模型,并进行试验结果预测.结果表明...为得到电Fenton技术深度处理煤化工废水的最优条件参数,采用电Fenton技术深度处理生物稳定的煤化工废水,利用正交试验、响应面法和中心复合试验设计对影响电Fenton处理效果的主要因素进行优化,建立二次模型,并进行试验结果预测.结果表明:各因素对处理效果影响程度的顺序为p H>电流密度>Fe2+浓度.根据方差分析,二次模型具有很高的显著性,能够很好地预测试验结果.影响处理效果的3个主要因素的最优值分别为p H 4.13、Fe2+浓度1.56 mmol/L、电流密度14.74 m A/cm2,此时TOC去除率达61.58%.电Fenton可以作为煤化工废水深度处理的一种有效技术.展开更多
基金supported by the National Iranian Copper Industry Co.
文摘This study discussed the application of response surface methodology(RSM)and central composite rotatable design(CCRD)for modeling and optimization of the influence of some operating variables on the performance of a lab scale thickener for dewatering of tailing in the flotation circuit.Four thickener operating variables,namely feed flowrate,solid percent,flocculant dosage and feedwell height were changed during the tests based on CCRD.The ranges of values of the thickener variables used in the design were a feed flowrate of 9–21 L/min,solid percent of 8%–20%,flocculant dosage of 1.25–4.25 g/t and feedwell height of 16–26 cm.A total of 30 thickening tests were conducted using lab scale thickener on flotation tailing obtained from the Sarcheshmeh copper mine,Iran.The underflow solid percent and bed height were expressed as functions of four operating parameters of thickener.Predicted values were found to be in good agreement with experimental values(R2values of 0.992 and 0.997 for underflow solid percent and bed height,respectively).This study has shown that the RSM and CCRD could effciently be applied for the modeling of thickener for dewatering of flotation tailing.
文摘为得到电Fenton技术深度处理煤化工废水的最优条件参数,采用电Fenton技术深度处理生物稳定的煤化工废水,利用正交试验、响应面法和中心复合试验设计对影响电Fenton处理效果的主要因素进行优化,建立二次模型,并进行试验结果预测.结果表明:各因素对处理效果影响程度的顺序为p H>电流密度>Fe2+浓度.根据方差分析,二次模型具有很高的显著性,能够很好地预测试验结果.影响处理效果的3个主要因素的最优值分别为p H 4.13、Fe2+浓度1.56 mmol/L、电流密度14.74 m A/cm2,此时TOC去除率达61.58%.电Fenton可以作为煤化工废水深度处理的一种有效技术.
