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为了探讨从含钒的铁水中提取钒的经济合理的工艺,本研究以碳酸钠为熔剂,对合钒铁水进行了预处理,并对铁水中的含硅量、炉渣碱度、碳酸钠加入量、处理温度和炉渣中加三氧化二铁等因素的影响进行了研究。试验结果表明,碳酸钠能有效地脱除铁水中的钒、硅、磷和硫,而合碳量变化不大。为了使提钒过程有效地进行,铁水中的含硅量应低于0.3％或炉渣碱度(Na_2O/SiO_2)大于4.0。碳酸钠加入量不少于30克/公斤·铁水,而处理温度愈低愈好,一般可保持在1300～1350℃。如果在熔剂中加入三氧化二铁,将会促进钒等的氧化。预计在碳酸钠加入量为35克/公斤·铁水和1300℃时,铁水中含钒量可降低到0.03％,炉渣中五氧化二钒的含量可以达到13.5％,钒的氧化率约为90％。
In order to explore the economical and reasonable process of extracting vanadium from vanadium-bearing hot metal, sodium vanadium was used as the flux to pretreat the vanadium-bearing hot metal. The effects of silicon content, basicity of slag, sodium carbonate addition , Treatment temperature and slag plus ferric oxide and other factors were studied. The results show that sodium carbonate can effectively remove the vanadium, silicon, phosphorus and sulfur in the molten iron, while the amount of coke does not change much. In order to effectively carry out the vanadium extraction process, the amount of silicon in the molten iron should be less than 0.3% or the basicity of the slag (Na 2 O / SiO 2) should be greater than 4.0. Sodium carbonate is added in an amount of not less than 30 g / kg of hot metal, and the lower the treatment temperature, the better, generally at 1300 to 1350C. If you add iron oxide in the flux, will promote the oxidation of vanadium. It is expected that the amount of vanadium in the molten iron can be reduced to 0.03% when the amount of sodium carbonate added is 35 g / kg · hot metal and 1300 ° C, the content of vanadium pentoxide in the slag can reach 13.5% and the oxidation rate of vanadium is about 90% .