摘要
提钒废水浓缩后会产生大量的固体废弃物,其中含有硫酸钠和硫酸铵等物质,若处理不当,将会污染环境,并造成资源浪费。可采用煤粉还原芒硝法,即煅烧—浸取—蒸发结晶流程处理该固体废弃物。运用热力学软件对提钒后的固体废弃物回收硫化钠过程进行了理论计算。研究了还原时间、浸取温度以及浸取时间对产品产率和Na_(2)S含量的影响。试验确定了以下优化条件:还原时间为4 h,浸取时间为6 h,浸取温度75℃。此时所得产品硫化钠含量为98.41%,产率可达97.71%。
Solid waste from vanadium extraction contains sodium sulfate and ammonium sulfate.If not treated properly,it will pollute the environment and waste resources.The process of calcination-leaching-evaporation crystallization was designed to treat the solid waste by reducing mirabilite with pulverized coal.Thermodynamic software was used to calculate the theory of recovering sodium sulfide from solid waste of vanadium extraction.The effects of reduction time,leaching temperature and leaching time on product recovery and Na_(2)S content were studied.The optimal conditions are determined as following reduction time at 4 h,leaching temperature in 75℃,leaching time with 6h.Under these conditions sodium sulfide content of the product is 98.41%,and the yield of sodium sulfide is 97.71%.
作者
张士举
ZHANG Shiju(College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,China)
出处
《矿产保护与利用》
2021年第3期66-69,共4页
Conservation and Utilization of Mineral Resources
基金
四川省发改委项目-冶金矿产二次资源高效利用研发中心建设(川发改投资[013]991号)
四川省钒钛资源综合利用试验室项目-高钛渣黏流特性的研究(2018FTSZ34)。
关键词
提钒的固体废弃物
硫化钠
煤粉还原芒硝法
vanadium extraction residue
sodium sulfide
coal reduction glaubers salt method
