钒钛磁铁矿提钒尾渣钙化碱浸试验研究
Study on calcified alkaline leaching of vanadium extracton tailings from vanadium titanium-magnetite metallurgy
瞿金为 1翁小影 2李高帅 2胡月芳 2马娜 2豆志河3
作者信息
- 1. 贺州学院广西碳酸钙资源综合利用重点实验室,广西贺州 542899;东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳 110819;武汉科技大学国家环境保护矿冶资源利用与污染控制重点实验室,湖北武汉 430081
- 2. 贺州学院广西碳酸钙资源综合利用重点实验室,广西贺州 542899
- 3. 东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳 110819
- 折叠
摘要
由于钒钛磁铁矿提钒尾渣中Na2O含量高,作为炼铁配矿使用时会造成高炉结瘤问题,难以规模化利用.本文针对此问题,以承钢钒钛磁铁矿提钒尾渣为原料,进行了钙化碱浸-偏钒酸铵沉钒试验,目的是对提钒尾脱碱的同时提取其中有价金属钒.试验主要考察了浸出温度、碱浓度、氧化钙添加量和液固比对钠和钒浸出率的影响,结果表明,在浸出温度160 ℃、碱浓度100 g·L-1、氧化钙添加量15％、液固比6∶1、浸出时间60 min的条件下,钒和钠的浸出率分别达到82.25％和85.36％;对含钒碱浸液进行偏钒酸铵沉钒,得到了纯度大于97％的V2O5产品;终渣中Na2O含量小于0.5％,Fe2O3含量达到30.10％,结合承钢高炉的碱金属平衡数据,可满足高炉炼铁配矿使用.本文研究结果可为相关企业钒钛磁铁矿提钒尾渣的规模化利用提供参考.
Abstract
In view of the problems such as large storage of vanadium extracted tailings,low utilization of valuable components and great harm to the environment,the process of calcification alkaline leaching under normal pressure was adopted to remove the alkali and extract the valuable metal vanadium.The reaction mechanism was studied and the effects of leaching temperature,alkali concentration,calcium oxide addition and liquid-solid ratio on the leaching rate of sodium and vanadium were investigated through single factor experiments.The results showed that the leaching rate of vanadium and sodium reached 82.25％and 85.36％respectively after 60 min leaching under the optimum conditions of 160 ℃ leaching temperature,100 g·L-1 alkali concentration,15％CaO addition and 8∶1 liquid-solid ratio.At the same time,the vanadium precipitation method with ammonium metavanadate was also used to obtain V2O5 products with purity greater than 97％.The analysis of final slag shows that the content of Na2O is less than 0.5％,and combined with the alkali metal balance data of chengsteel blast furnace,it can be used in blast furnace ironmaking and ore blending.
关键词
提钒尾渣/钙化碱浸/偏钒酸铵沉钒/V2O5/炼铁配矿Key words
vanadium extraction tailings/calcification alkaline leaching/precipitation of vanadium by ammonium metavanadate/V2O5/ironmaking and ore blending引用本文复制引用
基金项目
广西科技基地和人才专项(桂科AD23026079)
国基金联合项目(U1908225)
国家环境保护矿冶资源利用与污染控制重点实验室开放基金(HB202202)
广西壮族自治区高等学校中青年项目(2023KY0739)
广西大学生创新创业训练计划(S202311838096)
贺州学院博士启动基金(2023BSQD06)
广西壮族自治区科技计划(桂科AD23023008)
出版年
2024
NETL
NSTL
万方数据