石煤钒矿常压湿法清洁提取五氧化二钒工艺研究  

Study on the clean extraction process of vanadium pentoxide from vanadium ore of stone coal by atmospheric pressure wet method

作　　者：万洪强[1] 李静 田洪庆 罗豪 张丽芬[1] 田子瑜 WAN Hongqiang;LI Jing;TIAN Hongqing;LUO Hao;ZHANG Lifen;TIAN Ziyu(Changsha Institute of Mining and Metallurgy Co.,Ltd.,Changsha 410012,Hunan,China)

机构地区：[1]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《钢铁钒钛》2025年第1期25-33,共9页Iron Steel Vanadium Titanium

基　　金：国家重点研发计划项目(2020YFC1909705)。

摘　　要：针对目前石煤提钒环保和节能要求逐年提高的情况,开发了一种熟化水浸-萃取分离-沉钒煅烧的常压湿法清洁提取五氧化二钒工艺路线,以湖南岳阳某地石煤矿为原料,采用保温保湿浓H_(2)SO_(4)熟化浸出处理,同时对萃取、反萃和产品制备全过程进行了研究。试验结果表明,在矿物粒度100μm占98.3%,拌水量10%,酸用量18%,熟化温度120℃,熟化时间8 h,水浸液固比2:1,室温下搅拌浸出2 h条件下,钒浸出率达到87.8%。采用P204进行萃取,在pH=2.2时,经过5级单级萃取,钒萃取率已达98%,反萃4级可达99%以上的反萃率,在pH=1.0进行沉钒,多钒酸盐在600℃下煅烧2 h,V_(2)O_(5)产品达到国家标准要求。In view of the increasing environmental protection and energy saving requirements of vanadium extraction from stone coal year by year,a clean process for V_(2)O_(5) extraction by atmospheric pressure wet method including water leaching,extraction separation,vanadium precipitation and calcination was developed.A stone coal mine in Yueyang,Hunan Province was used as raw materials in this paper.Using insulated humidity-concentrated H_(2)SO_(4) maturation leaching treatment,and also investigated the whole process of extraction,back-extraction and product preparation.The test results show that the vanadium leaching rate can reach 87.8%under the following conditions:98.3%of mineral size under 100μm,10%of water mixing,18%of acid dosage,maturation temperature of 120℃,maturation time of 8 h,water leaching liquid-solid ratio of 2:1 and stirring leaching for 2 h at room temperature.With P204 extraction,the vanadium extraction rate was 98%after 5 single-stage extraction at pH=2.2,and the back-extraction rate of 4 stages could reach more than 99%.At the pH of 1.0 for vanadium precipitation and then multi-vanadate was calcined at 600℃for 2 h,required V_(2)O_(5) product met the requirements of national standards.

关 键 词：五氧化二钒 石煤钒矿 清洁提取 湿法 常压 浸出率 

分 类 号：TF841.3[冶金工程—有色金属冶金]