含钼废渣冶炼钼铁的优化试验

Optimization test of molybdenum iron smelting from molybdenum waste

利用含钼废料钼酸钙为原料,采用碳还原法冶炼钼铁,通过单因素分析试验及正交试验优化得出最佳的试验条件,钼酸钙加入量应低于10%,熔炼温度为1 525℃,保温时间为25 min,碱度为1.3。通过XRD、SEM、EDS分析得出用此方法生产得到的钼铁合金中,钼以Mo_(2)C、Fe_(3)Mo以及Fe_(3)Mo_(3)C的形式存在,渣系为二元玻璃渣系,具有与普通玻璃相似的成分系统。经测定合金中钼的回收率大于99%,钼资源回收效益可观。

Smelting of ferromolybdenum was performed by carbon reduction method using waste calcium molybdate containing molybdenum as raw material. The optimum experimental conditions were obtained by single factor analysis test and orthogonal test optimization. Calcium molybdate addition should be less than 10%, smelting temperature was 1 525 ℃, holding time was 25 min and alkalinity was 1.3. Through XRD, SEM and EDS analysis, it could be concluded that Mo existed in the form of Mo_(2)C, Fe_(3)Mo and Fe_(3)Mo_(3)C in the molybdenum-iron alloy produced by this method. The slag system was a binary glass slag system with a composition system similar to that of ordinary glass. The recovery rate of Mo in alloy was greater than 99%, and recovery benefit of Mo resource was considerable.