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40℃和75℃下三元体系NH4HCO3-NH4VO3-H2O中NH4VO3溶解度的测定
  • ISSN号：1000-6613
  • 期刊名称：《化工进展》
  • 时间：0
  • 分类：TQ135.1[化学工程—无机化工]
  • 作者机构：[1]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190, [2]中国矿业大学北京化学与环境工程学院,北京100083
  • 相关基金：国家重点基础研究发展计划（2013CB632605）、中国科学院重点部署项目（KGCX2-EW-215）及国家自然科学基金（51274179,51090382）项目.
作者： 赵楚[1,2], 冯曼[1], 王少娜[1], 杜浩[1], 郑诗礼[1], 谢华[2]
关键词： 亚熔盐, 钒酸钙, 偏钒酸铵, 二氧化碳, 结晶, 优化, sub-molten salt, calcium orthovanadate, ammonium metavanadate, carbon dioxide, crystallization, optimization
中文摘要：

针对钾系亚熔盐法钒渣钒铬共提清洁生产工艺的中间产品钒酸钙，提出通过碳化铵化/冷却结晶将钒酸钙转化为钒氧化物产品的新方法。分别研究了NH4HCO3-NH4VO3-H2O三元体系在碳化反应温度（75℃）和结晶沉钒温度（40℃）时NH4VO3的溶解度，得到了此时NH4VO3的溶解度数据。40℃时，NH4VO3溶解度随NH4HCO3浓度升高而降低。75℃时，NH4VO3溶解度则随NH4HCO3浓度升高呈U形变化。通过对比两个温度下NH4VO3的溶解度曲线，验证了碳化铵化工艺75℃反应、40℃结晶的设计思路。并经过理论计算，得到 NH4VO3的理论一次结晶率为92.71%。再由得到理论结晶率时的反应和结晶NH4HCO3浓度，优化了钾系亚熔盐法钒渣钒铬共提清洁生产工艺中钒转化单元的工艺路线，绘制了工艺原则流程图。

英文摘要：

A new method for transforming calcium orthovanadate to vanadium oxide , through carbonization ammoniation/cooling crystallization was proposed for processing vanadium slag by KOH sub-molten salt method. According to the investigation of the equilibrium solubility data for ternary NH4HCO3-NH4VO3-H2O system at the temperatures of carbonization reaction（75℃）and vanadium crystallization（40℃）,solubility data of NH4VO3 was finally achieved. At the temperature of 40℃, solubility data of NH4VO3 decreased with increasing NH4HCO3 concentration. And at the temperature of 75℃,the change of NH4VO3 solubility data followed the U type with concentration of NH4HCO3. Based on the different solubility curves,the design was proved and the theory of crystallization rate 92.71% was deduced. A flowchart of vanadium transformation process was optimized for processing vanadium slag with KOH sub-molten salt method.

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期刊信息
  • 《化工进展》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国化工学会 化学工业出版社
  • 主编：曹湘洪
  • 地址：北京市东城区青年湖南街13号
  • 邮编：100011
  • 邮箱：hgjz@263.net
  • 电话：010-64519500/9501/9502
  • 国际标准刊号：ISSN：1000-6613
  • 国内统一刊号：ISSN：11-1954/TQ
  • 邮发代号:82-311
  • 获奖情况:
  • 全国中文核心期刊,中国精品科技期刊,中国百种中国杰出学术期刊,第七届全国石油和化工行业优秀期刊一等奖,吕国化工学会会刊
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  • 被引量:37234