混磨工艺对钒渣钠化焙烧效果的影响研究  

Influence of Mixing-milling Technique on Sodium Roasting of Vanadium Slag

作　　者：蒋霖[1] 伍珍秀[1] 高官金[1] Jiang Lin;Wu Zhenxiu;Gao Guanjin(Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室

出　　处：《钢铁钒钛》2019年第6期24-29,共6页Iron Steel Vanadium Titanium

摘　　要：采用一种全方位球磨机对饥渣和碳酸钠进行强化研磨、混合,分析了混磨后的混合料粒度分布、粉末形貌和混匀度,并与粉体直接搅拌混合得到的混合料进行了对比,研究了不同碱配比的混合料在搅拌混合和强化混磨两种工艺下的焙烧转浸率差异,考察了混磨时间和焙烧温度对混合料焙烧转浸率的影响。结果表明:在相同的碱配比下,混磨工艺能显著提高混合料的焙烧转浸率,碱配比为22%时,混磨后的混合料焙烧转浸率可达92.67%,而搅拌混合在碱配比26%时焙烧转浸率仅92.34%;在相同的焙烧转浸率要求下,混磨可以降低碳酸钠用量;混磨时间在20 min以后,混合料的焙烧转浸率变化不大;适宜的高温焙烧温度为770~790 t。混磨工艺对于提升锐渣钠浸提帆转化率、降低钠盐用量具有一定的实用性。Vanadium slag and sodium carbonate were mixed and milled by an omni-directional ball mill.The particle size distribution,morphology and uniformity of the materials after mixing and milling were analyzed and compared with those of the materials of vanadium slag and sodium carbonate by direct mixing.The difference in leaching rate of the roasted vanadium slag respectively by the direct mixing and mixing・milling processes were investigated at variable alkali ratios,and the effects of mixing・milling time and roasting temperature on the leaching rate of the roasted vanadium slag were also studied.The results show that compared with direct mixing the mixing-milling process can increase the leaching rate of the roasted vanadium slag significantly at the same alkali ratio.A leaching rate of 92.67%can be obtained for the roasted vanadium slag by mixing・milling process at 22%of alkali ratio,while the leaching rate of 92.34%can be obtained for the roasted vanadium slag by direct mixing at 26%of alkali ratio.The mixing・milling process can decrease the sodium carbonate dosage at the same leaching rate requirement in comparison with the direct mixing.When the mixing・milling time exceeds 20 min,the leaching rate of the roasted vanadium slag changes slightly.The favorable roasting temperature is determined at 770〜790°C.The search has a practical guidance on enhancement of vanadium recovery and decrease of sodium salt consumption during sodium roasting of vanadium slag.

关 键 词：飢渣 混磨 提锐 焙烧 钠化转浸率 

分 类 号：TF841.3[冶金工程—有色金属冶金] TD921[矿业工程—选矿]