钙含量对含钒页岩钠盐焙烧—水浸提钒的影响

胡杨甲; 张一敏

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DOI:10.3969/j.issn.1007-7545.2014.09.010

有色金属（冶炼部分）:2014,(9):34-38

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钙含量对含钒页岩钠盐焙烧—水浸提钒的影响

胡杨甲,张一敏

(北京矿冶研究总院矿物加工科学与技术国家重点实验室;武汉科技大学资源与环境工程学院湖北省页岩钒资源高效清洁利用工程技术研究中心,武汉科技大学资源与环境工程学院湖北省页岩钒资源高效清洁利用工程技术研究中心)

Effect of Calcium Content on Vanadium Extraction from Black Shale by Sodium Roasting-Water Leaching

Hu Yang-jia and Zhang Yi-min

(Beijing General Research Institute of Mining Metallurgy,State Key Laboratory of Mineral Processing,Beijing,;China;Hubei Provincial Engineering Technology Research Center of High efficient Cleaning Utilization for Shale Vanadium;College of Resource and Environment Engineering,Wuhan University of Science and Technology,Wuhan,;China,)

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投稿时间：2014-03-27 修订日期：2014-04-13

中文摘要: 研究了钙含量对高钙云母型含钒页岩钠盐焙烧提钒水浸率的影响。结果表明，矿石中氧化钙含量对钒水浸率影响很大。反应物CaCO3与V2O5的摩尔比大于2∶1时，850 ℃焙烧时主要产物为Ca3V2O8和Ca2V2O7，从而导致钒的水浸率偏低。热力学计算表明，钒酸钙盐在酸性溶液中比碱性溶液中溶解度大，因此对于高钙云母型含钒页岩可以考虑采用钠盐焙烧—水浸—酸浸或者钠盐焙烧—酸浸的方法提高钒的回收率。未除钙焙烧样通过稀酸浸出，最终获得了73%的钒浸出率。

中文关键词: 钒含钒页岩石煤钙焙烧

Abstract:The effect of calcium content on water leaching rate of vanadium from typical high calcium mica-type vanadium-bearing black shale stone coal by sodium roasting and water leaching was investigated. The results show that calcium content in ore exerts significant influence on water leaching rate of vanadium. The roasting products are Ca3V2O8 and Ca2V2O7 in 850 ℃ with molar ratio of CaCO3 to V2O5 of 2∶1 above, thereby, the water leaching rate of vanadium declines sharply. Products of CaV2O6, Ca2V2O7, Ca3V2O8 are more soluble in acid solutions than those in alkali solutions by calculation of thermodynamics. Therefore, technologies of sodium roasting-water leaching-acid leaching or sodium roasting-acid leaching can improve vanadium recovery for high calcium mica-type vanadium-bearing black shale. The final leaching rate of vanadium by dilute acid is 73% of roasted sample without calcium removal.

keywords: vanadium vanadium-bearing black shale stone coal calcium roasting

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基金项目:“十二五”国家科技支撑计划重点项目（2011BAB05B01）

作者	单位	E-mail
胡杨甲^*	北京矿冶研究总院矿物加工科学与技术国家重点实验室武汉科技大学资源与环境工程学院湖北省页岩钒资源高效清洁利用工程技术研究中心	ajia216@163.com
张一敏	武汉科技大学资源与环境工程学院湖北省页岩钒资源高效清洁利用工程技术研究中心

Author Name	Affiliation	E-mail
Hu Yang-jia	Beijing General Research Institute of Mining Metallurgy,State Key Laboratory of Mineral Processing,Beijing, China Hubei Provincial Engineering Technology Research Center of High efficient Cleaning Utilization for Shale Vanadium College of Resource and Environment Engineering,Wuhan University of Science and Technology,Wuhan, China	ajia216@163.com
Zhang Yi-min

引用文本：
胡杨甲,张一敏.钙含量对含钒页岩钠盐焙烧—水浸提钒的影响[J].有色金属（冶炼部分）,2014(9):34-38.
Hu Yang-jia,Zhang Yi-min.Effect of Calcium Content on Vanadium Extraction from Black Shale by Sodium Roasting-Water Leaching[J].Nonferrous Metals (Extractive Metallurgy),2014(9):34-38.

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