响应曲面法优化钒钛磁铁矿提钒试验

 钒钛磁铁矿中的铁、钒以及钛等元素的高效回收,对钒钛磁铁矿资源的综合利用有非常重要的意义。研究表明,多种因素对钒钛磁铁矿的钠化-还原-熔分耦合过程的熔分程度及元素的收得率有重要影响。针对钒钛磁铁矿采用钠化-还原-熔分耦合工艺实现铁、钒及钛元素的综合回收,根据Box-Behnke原理设计方案,选取配煤量、配碱量及还原温度3个试验因素,通过响应曲面法研究各因素对钒钠化浸出指数的影响规律,并对试验因素进行优化。通过分析试验结果,建立相应的多项式模型,得到最优的工艺条件为,配煤量25.00%,配碱量58.29%,还原熔分温度1 251.84 ℃,钠化浸出指数响应值90.19%。在最佳条件下做验证试验,发现钠化浸出指数为 87.15%,误差仅为3.37%,证明响应曲面法预测模型具有可靠性和准确性。

Experiment on optimization of vanadium extraction from vanadium-titanium magnetite by response surface methodology

The efficient recovery of iron,vanadium,titanium,and other elements in vanadium-titanium magnetite is of great significance for the comprehensive utilization of vanadium-titanium magnetite resources.Studies have shown that a variety of factors have an important influence on the degree of melting and the yield of elements in the process of sodiumization-reduction-melting coupling of vanadium-titanium magnetite.According to the design scheme of the Box-Behnke principle,this experiment selects three test factors:coal blending amount,alkali blending amount,and reduction temperature.The response surface method is used to study the influence of each factor on the vanadium sodium leaching index and optimize the test factors.By analyzing the experimental results,the corresponding polynomial model was established,and the optimal process conditions were obtained:coal blending amount 25.00%,alkali blending amount 58.29%,reducing melting temperature 1 251.84℃,and sodium leaching index response value 90.19%.The verification test was conducted under the best conditions,and it was found that the sodium leaching index was 87.15%,and the error was only 3.37%,which proved that the response surface method prediction model had reliability and accuracy.