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研究了”钠化钒渣室温浸出—除硅—电渗析—除磷—酸性铵盐沉钒”新工艺。特点为:钒渣室温下浸出,低价钒和一般杂质元素浸出率低;用氧化镁作除硅和除磷剂,净化效果好,钠盐损失小;采用电渗析技术,钠盐回收率和低价钒氧化率高;酸性铵盐沉钒,钒的沉淀率高。主要技术指标为:成品五氧化二钒品位99.37％,沉钒率99.64％,液计钒的回收率94.37％,钠盐回收率>80％。取得了较好的技术经济指标。
The new technology of “sodium vanadium slag room temperature leaching - silicon removal - electrodialysis - phosphorus removal - acid ammonium salt Shen vanadium” was studied. The vanadium slag has the advantages of leaching at room temperature, low vanadium and low leaching rate of common impurity elements, magnesium oxide as silicon removal and phosphorus removal agent, good purification effect and small sodium salt loss; using electrodialysis technology, sodium salt recovery and Low vanadium oxidation rate; acidic ammonium salt Shen vanadium, vanadium precipitation rate. The main technical indexes are as follows: finished vanadium pentoxide grade 99.37%, vanadium precipitation rate 99.64%, liquid vanadium recovery 94.37%, sodium recovery> 80%. Achieved good technical and economic indicators.