响应曲面法优化含钼废渣冶炼MoFe工艺

Optimization of Preparing MoFe with Molybdenum-containing Waste Residue by Response Surface Methodology

对国内某钼业公司的氨浸渣和钼酸钙废渣进行了直接还原冶炼钼铁回收Mo的实验研究。通过单因素实验确定主要影响因素和水平后,运用基于中心组合设计的响应曲面法对影响Mo回收率的主要因素进行研究并优化。研究表明:熔炼温度对Mo回收率的影响最显著,碱度次之,保温时间影响最小。通过分析实验结果,建立了钼回收率的二次多项式模型,模型预测的最佳实验条件为:熔炼温度1 525℃,保温时间20.13 min,碱度1.29。在最佳实验条件下进行验证实验,实验结果表明:Mo回收率实际值与预测值具有良好一致性,相对误差仅为0.74%。

The present study was carried out for the recovery of molybdenum by using ammonia leach residue and calcium-molybdate were used in the experiment for preparing MoFe by direct reduction process. The main influence factors and levels were ascertained by single factor experiments, and response surface methodology （RSM） was used in optimizing the main influence factors of recovery of molybdenum. The results show that the effect of melting temperature on the molybdenum recoveryyield is the most significant, the effect of alkalinity is second, and the effect of holding time is minimum. Through analyzing the results of response surface methodology experiments, a quadratic polynomialmodel of the molybdenum recovery yield by usingmolybdenum industrial waste. The optimal values of the operation parameters under the related constraint conditions were found the melting temperature value of is 1 525 ℃ ,the holding time is 20. 13 min,the alkalinity is 1.29. In addition,a satisfactory goodness-of-fit was achieved between the predictive and the experimental results, the relative error between actual and predicted values is 0. 74%.