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A study was conducted on blank roasting and sulfuric acid leaching process for vanadium extraction from vanadium-bearing stone coal. Effects of ore sample particle size, roasting time, roasting temperature, sulfuric acid dosage, leaching time and leaching temperature on the vanadium extraction performance were investigated. Based on the optimized processing conditions, including sample with particle size of-0.15 mm, roasting temperature of 900 ℃, roasting time of 6 h, sulfuric acid dosage of 5%, liquid-solid ratio of 2 mL/g and stirring leaching at room temperature for 3 h, a scale-up verification experiment was conducted with increased ore sample feed. As a result, a vanadium leaching rate was 78.2%, and the main impurities and corresponding contents in the stock solution were found to be as follows:Fe 0.154 g/L, Al 0.578 g/L and Si 0.617 g/L. It is found that blank roasting effectively reduces sulfuric acid consumption and results in low impurity contents in the leaching solution, thus reducing difficulty in subsequent impurity removal process.

, authors=Yuncong MA¹, Hao LUO², Yisheng WANG¹, Lian WANG¹, authorsList=Yuncong MA, Hao LUO, Yisheng WANG, Lian WANG, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314907221167801091, articleId=1314907220513489665, tenantId=1146029695717560320, journalId=1235980550691926019, language=CN, title=石煤钒矿空白焙烧及酸浸提钒工艺研究, columnId=1236276107322913000, journalTitle=矿冶工程杂志, columnName=冶金, runingTitle=null, highlight=null, articleAbstract=

对石煤钒矿进行了空白焙烧-硫酸酸浸工艺研究。考察了矿样粒度、焙烧时间、焙烧温度以及硫酸浸出酸添加量、浸出时间、浸出温度对石煤钒矿提钒性能的影响。结果表明，优化工艺条件为：矿样粒度-0.15 mm、焙烧温度900 ℃、焙烧时间6 h，硫酸添加量5%、液固比2 mL/g、常温搅拌浸出3 h；在此条件下适当扩大矿样投加量进行优化验证实验，钒浸出率78.2%，浸出原液主要杂质含量Fe 0.154 g/L、Al 0.578 g/L、Si 0.617 g/L。空白焙烧有效降低了硫酸添加量且浸出液杂质含量较低，可有效降低后续除杂工艺难度。

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马云聪（1991—），男，湖南岳阳人，工程师，主要从事矿产资源湿法冶金资源回收利用研究。E-mail: 1325918857@qq.com

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马云聪（1991—），男，湖南岳阳人，工程师，主要从事矿产资源湿法冶金资源回收利用研究。E-mail: 1325918857@qq.com

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