中温煅烧分离回收钒冶炼废渣硫酸铵与硫酸钠  

Separation and recovery of ammonium sulfate and sodium sulfate from vanadium smelting residues by medium temperature calcinations

作　　者：谢世前 余江[1,2] 陶红群 冉宗信 王亚婷 郭欣 彭炜东 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]四川大学新能源与低碳技术研究院,四川成都610065 [3]成都市环境保护科学研究院,四川成都610072

出　　处：《深圳大学学报（理工版）》2017年第6期557-561,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(31100374);四川省科技厅重点资助项目(2017GZ0380);成都市科技局资助项目(2015-HM01-00013-SF)~~

摘　　要：以攀枝花炼钢厂沉钒废渣(提取钒后冶炼废渣)为原料,采用预处理、中温煅烧和回收硫酸钠硫酸铵处理工艺,探讨原料水分及颗粒大小、煅烧温度、煅烧时间以及搅拌次数等对硫酸钠和硫酸铵混合结晶物产品纯度及有效回收率的影响.通过正交试验,确定了比较理想的分离回收工艺条件为:干燥温度120℃,干燥时间1 h,干燥后原料中水分可由18.9%降至5.0%;煅烧温度为400℃,煅烧时间3 h,搅拌3次.分离所得硫酸钠和硫酸铵的纯度分别可达到90.56%和94.41%,有效回收率分别为91.31%和21.51%.通过此方法分离产物硫酸铵与硫酸钠可用作生产原料,实现固废资源化,避免环境污染.Taking the precipitated vanadium waste residue,which is smelting slag after extracting vanadium from Panzhihua Steel,as raw materials,and by using the techniques of pretreatment,medium temperature calcination and recovery of sodium sulfate ammonium sulfate,we explore the effects of material moisture content,particle size,calcination temperature,calcination time and stirring number on product purity as well as the recovery efficiency of mixed crystals of sodium sulfate and ammonium sulfate. The ideal separation recycling process conditions is obtained by orthogonal test. The optimal drying process parameters are drying temperature of 120 ℃,drying time of 1 h,by which the moisture in the raw material could reduce from 18. 9% to 5%. The optimal calcination process parameters include calcination temperature of 400 ℃,calcination time of 3 h,stir of 3 times. Finally,the purity of segregatesodium sulfate and segregate ammonium sulfate could reach 90. 56% and 94. 41%,respectively; and their recovery efficiency is 91. 31% and 21. 51%,respectively. The segregate sodium sulfate and segregate ammonium sulfate produced with this method can be used as raw materials directly. This process can not only achieve solid waste recycling,but also avoid environmental pollution.

关 键 词：化学分离工程 硫酸钠 硫酸铵 尾矿废渣 中温煅烧 资源回收 

分 类 号：X705[环境科学与工程—环境工程]