摘要:
采用精粉钒渣与碳酸钠混合造球焙烧的方法,在焙烧过程中不仅避免了钒渣焙烧过程中物料的粘结现象,而且无提钒残渣加入,可大幅度提高焙烧炉的效率,提高生产效率,减小能耗,减少粉尘对现场环境的污染。其最佳工艺参数为:钒渣钠化球团的最佳粒径为5 mm,碳酸钠与精粉钒渣最佳比例为26%,最佳焙烧温度为800℃,最佳焙烧时间为60 min,熟料中钒的转浸率达到94%以上。通过模拟工业多膛炉温度程序焙烧钒渣钠化球团熟料,按照液体中钒收率计算,转浸率达到95%;按照残渣中钒收率计算,转浸率达到92%,均高于传统提钒工艺的钒转浸率。
Abstract:
Roasting of vanadium slag pellets containing sodium carbonate were investigated in this paper.This technology can avoid sintering of raw materials during roasting without addition of residual slag of vanadium extraction,and substantially increases calcination efficiency of vanadium slag coupled with decrease in energy consumption.Moreover,the adverse effect of dust on the environment can be effectively relieved.The optimum process parameters are as follows:about 5 mm of pellets diameter,26% of sodium carbonate to vanadium slag and 800℃ of roasting temperature for 60 min.The immersion ratio of vanadium in clinker is more than 94% under the optimum conditions.By roasting of the vanadium slag pellets under simulating temperature program of industrial multi-hearth furnace,the immersion ratio of vanadium in solution can reach 95% and it is 92% with calculation according to vanadium content in residual slag,both of which are higher than that for traditional process.
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