某铀钼矿萃取反萃取过程有机相损失途径研究

摘要

Research on organic phase loss routes of extraction and re-extraction process to a uraniummolybdenum associated ore indicate that loss routes include organic phase entrained by aqueous phase and interfacial crud,volatilization and dissolution loss of organic phase,organic phase loss from negative pressure ventilation system which is the main route of organic phase loss.Recommended ways to reduce organic phase loss are:setting up static sealed pool for aqueous phase,separating organic phase from interfacial crud by centrifuge,the whole airtight utilization process of organic phase.Trough extractor with negative pressure ventilation system is airtight,and the negative pressure is minus 2 000 Pa generated from induced draught valve installed on the by-path ventilating duct.The vents is installed at the far end of mixer-settler.Temperature of extraction and re-extraction is ≤30 ℃,and altitude difference of extraction liquid level and trough extractor roof is ＞8 cm.Based on the control methods,the organic phase loss of ton ore is decreased to 2.5 kg.%对某铀钼矿萃取、反萃取过程有机相损失途径的研究表明:有机相损失途径主要有水相夹带、有机相溶解损失、三相物夹带、有机相挥发损失、引风负压损失,其中引风负压损失为主要途径.解决降低有机相消耗的措施有:水相设置静置浮油池;三相物离心分离回收有机相,有机相使用过程全程密闭,负压通风设施采用槽体全密闭、管道旁路进风调节负压--2 000 Pa,引风口设置在槽体澄清室远端,萃取、反萃取温度≤30℃;槽体顶部与液面高度差＞8 cm.通过采取这些措施,生产中t矿有机相消耗已降至2.5 kg.