响应曲面法优化铝电解废阴极碱熔提纯工艺

Optimization of Alkali Fusion Purification of Spent Cathode Carbon from Aluminum Electrolysis by Response Surface Methodology

通过响应曲面法优化铝电解废阴极碱熔提纯工艺过程。基于Box-Behnken Design(BBD)设计,研究了温度、时间、初始碱料比对废阴极碱熔除杂效果的影响,获得了影响因素与碱熔渣碳含量之间的二次数学模型,确定了碱熔脱杂最优工艺参数:碱熔温度550 ℃、碱熔时间180 min、初始碱料比2,此条件下碱熔渣碳含量95.47%,与预测值相差0.61个百分点。试验值与模型预测值相近,表明该模型可用于优化废阴极碱熔提纯过程。

Alkali fusion purification process of spent cathode carbon from aluminum electrolysis was optimized by response surface method(RSM).Based on Box-Behnken Design(BBD),effects of temperature,time,and initial mass ratio of alkali to material on purification effect by alkali melting were studied.Secondary mathematical model between factors and carbon content was obtained.Residue carbon content is 95.47%,with 0.61 percent point different from predicted value,under the optimum conditions including temperature of 550℃,time of 180 min,and mass ratio of alkali to material of 2.Experimental results are similar to those predicted by the model,indicating the model can be used to optimize purification process of spent cathode carbon.