摘要:
钒铝合金主要作为制作钛合金、高温合金的中间合金及某些特殊合金的添加剂,五氧化二钒是制备钒铝合金的重要原料。在实验室条件下,通过返溶除硅、碱性沉钒工艺制备的五氧化二钒符合钒铝合金原料的要求,纯度达到了99.5%,Si、Cr、Fe均小于0.05%。工业试验工艺稳定,五氧化二钒的纯度达到99.5%,杂质含量小于0.05%。确定的适宜工艺参数为:除硅剂A与硅摩尔比为1.05、除硅反应pH值为10.0,除硅反应温度为70℃、除硅反应时间为60 min、沉钒反应沉钒剂与钒摩尔比为3.1、沉钒反应温度为60℃、沉钒反应时间为60 min。
Abstract:
Vanadium-aluminum alloy is primarily used as additive in production of titanium alloy,super-alloy and some special alloys,and vanadium pentoxide is an important raw material for the preparation of vanadium-aluminum alloy.Under laboratory conditions,vanadium pentoxide meeting the requirements for vanadium-aluminum alloy preparation was obtained by re-dissolution for silicon removal and alkaline pre-cipitation of vanadium,with the purity of V2O5 reaching 99.5% and the content of Si,Cr and Fe less than 0.05%.After the industrial test,the purity of vanadium pentoxide reached 99.5% and the content of impurities was less than 0.05% with stable process.The optimum parameters are as follows:the molar ra-tio of desilication agent to silicon is 1.05,the pH for desilication is 10.0,the temperature and time for desilication are respectively 70℃ and 60 min;The molar ratio of precipitating agent to vanadium is 3.1,the temperature and time for precipitating reaction are 60℃ and 60 min,respectively.
下载:
