摘要
印度某高含碳含钒煤渣含钒3.57%、镍1.19%,具有较高回收价值,但该渣碳含量较高(14.61%),采用传统直接浸出效果较差。首先采用氧化焙烧对该含钒煤渣进行脱碳预处理,然后采用硫酸熟化—水浸技术提取其中的钒和镍。重点研究了焙烧、硫酸熟化和水浸工艺参数条件对钒、镍的浸出的影响。结果表明,最优焙烧温度和时间分别为800℃、2h;焙砂的最佳浸出粒度为-0.075mm占比90%;最佳熟化工艺参数条件为:酸料比1.5∶1、熟化温度200℃、熟化时间1h;最佳水浸条件为:固液比4∶1、水浸温度95℃、水浸时间2.5h;在上述最佳工艺参数条件下,钒的浸出率可高达96%,镍的浸出率约53%。
High carbon vanadium cinder in an Indian plant contains 3.57%vanadium and 1.19%nickel,which has a high recovery value.However,after detailed raw material analysis,the slag has a high carbon content(14.61%).The effect of traditional direct leaching is poor,so it is necessary to decarbonize the vanadium containing cinder by oxidation roasting first,and then to extract vanadium and nickel by sulfuric acid-water leaching technology.The roasting,sulfuric acid curing and water leaching process parameters were studied,and the roasting temperature and time were investigated.The effects of the leaching conditions such as the ratio of solid to liquid,temperature and time were obtained by comparing the leaching rates of vanadium and nickel.The results showed that the optimum roasting temperature and time were 800℃and 2 h,respectively.The optimum leaching size of calcine is less than 0.0750 mm,the proportion is 90%,and the optimum grinding time of calcine is 120 s.The optimum curing parameters are the acid-material ratio of 1.5:1 and curing for 1 h at 200 U.The optimal water leaching condition is that the solid-liquid ratio is 4:1 and the material is leached at 95℃for 2.5 h.Under the optional process parameter conditions mentioned above,the leaching rate of vanadium can reach up to 96%,and the leaching rate of nickel is about 53%.
作者
王岩
袁朝新
黄海辉
王为振
高崇
靳冉公
WANG Yan;YUAN Chaoxin;HUANG Haihui;WANG Weizhen;GAO Chong;JIN Rangong(BGRIMM TechnologyGroup,Beijing 100160,China)
出处
《矿冶》
CAS
2024年第1期64-69,共6页
Mining And Metallurgy
关键词
钒电池
含钒煤渣
脱碳
熟化
水浸
钒
镍
vanadium batteries
vanadium containing coal slag
decarbonization
maturation
water immersion
vanadium
nickel
