高炉消化提钒二次尾渣可行性分析

Feasibility Analysis of Vanadium Two Tailings by the Blast Furnace Digestion

提钒二次尾渣含有铬和钒,露天堆存和直接外排都会对环境造成严重危害。尾渣中含有铁,经烧结球团后进入高炉冶炼,可将Cr6+还原成无毒的Cr3+,解决了铬对环境的影响,同时还回收利用了钒、铁,实现资源综合利用。但是,二次尾渣中的碱金属经烧结或球团后,脱碱效果不明显,基本全部又转移到了高炉作业工序。针对碱金属对高炉的影响,分析了二次尾渣中的碱金属对高炉的碱负荷、入炉品位、焦比、产量等影响,得出提钒二次尾渣经烧结球团后进入高炉冶炼是经济可行的。

Since the vanadium two tailings contains chromium and vanadium, it will do harm to the environment if it is stored in the open-air and discharged directly. The iron in the tailings smelted in the blast furnace after pellet sintering can reduce Cr^6＋ to Cr^3＋, eliminating the harm of chromium to environment and recovering vanadium and i- ron. However, the alkali metal in the two tailings after pellet sintering doesn＇ t be dealkalized obviously and it is al- most transferred to the blast furnace operation activity. Directed at the effect of blast furnace on alkali metal, the effect of alkali metal in two tailings on the alkali load, grade, coke ratio and yield of blast furnace was analyzed, obtaining that vanadium two tailings after pellet sintering by blast furnace smelting is economical and feasible.