高铬型钒钛磁铁矿综合利用现状及进展

发布时间：2018-02-07 10:57

  本文关键词： 高铬型钒钛磁铁矿 综合利用 高炉冶炼 非高炉冶炼 气基竖炉直接还原 熔分　出处：《钢铁研究学报》2017年05期 　论文类型：期刊论文

【摘要】：高铬型钒钛磁铁矿是一种典型的多金属共伴生矿产资源,具有极高的综合利用价值。目前主要的冶炼流程为高炉—转炉。该工艺处理量大、生产规模大、技术成熟,但有价组元利用率低、资源浪费严重、环境负荷高。并且转底炉、回转窑等非高炉流程亦具有能耗高、钛渣品位低活性差等一系列缺点。基于气基竖炉直接还原的优越性,研发了高铬型钒钛矿氧化造块—气基竖炉直接还原—熔分新工艺。高铬型钒钛矿适宜氧化焙烧条件为1 300℃下焙烧20min;在1 100℃、V(H2)/V(CO)=5/2条件下还原35min,还原率达95%;最佳熔分条件为配碳比1.2,熔分温度1 650℃、熔分时间45min、CaF2配量2%(质量分数),碱度1.1。该种工艺下铁、钒、铬、钛收得率分别约为99%、98%、95%和95%,实现了有价组元的高效分离,是高铬型钒钛矿高效低碳综合利用的首选技术之一,为攀枝花钒钛矿的综合利用提供了参考。
[Abstract]:High chromium type vanadium titanomagnetite is a typical polymetallic associated mineral resource with high comprehensive utilization value. At present, the main smelting process is blast furnace converter. However, the utilization ratio of valuable components is low, the waste of resources is serious, and the environmental load is high. Moreover, the non-blast furnace processes such as rotary furnace and rotary kiln also have a series of shortcomings, such as high energy consumption, low activity of titanium slag, etc. Based on the superiority of direct reduction of gas base shaft furnace, A new process of oxidation block making of high chromium vanadium titanium-gas base shaft furnace was developed. The suitable conditions for oxidation roasting of high chromium type vanadium titanite are 1 300 鈩，

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