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投稿时间：2015-01-20 修订日期：2015-01-23 录用日期：2015-01-27 网络发布日期：2015-06-23
投稿时间：2015-01-20 修订日期：2015-01-23 录用日期：2015-01-27 网络发布日期：2015-06-23
中文摘要: 采用硫酸焙烧—浸出工艺从某难处理石煤中提钒，分析了硫酸焙烧及浸出过程中矿物物相及微观结构的变化。结果表明，当加入0.25 mL/g硫酸在200 ℃焙烧1.5 h后，按液固比（mL/g）为1.2在80 ℃浸出60 min的条件下，钒浸率可达到85.57%。硫酸焙烧过程中方解石转变为硬石膏，含钒云母结构被破坏，同时生成硫酸铝钾晶相，矿物微观结构疏松多孔。与传统酸浸工艺相比，硫酸焙烧—浸出工艺的焙烧温度低、浸出过程无助浸剂、浸出时间短、浸出率高、能耗低。
Abstract:Vanadium was extracted from refractory stone coal by sulfuric acid roasting and leaching process. Main phase changes and mineral microstructure during roasting and leaching were analyzed. The results show that vanadium leaching rate is 85.57% under the optimum conditions including dosage of sulfuric acid of 0.25 mL/g, roasting temperature of 200 ℃, roasting time of 1.5 h, and leaching ratio of liquid to solid of 1.2 (mL/g) at 80 ℃ for 60 min. During roasting, calcite converts to anhydrite, vanadium-bearing muscovite is thoroughly broken down and aluminum potassium sulfate is generated, mineral microstructure became loose and porous. Compared with conventional acid leaching, sulfuric acid roasting and leaching process has the advantages of low roasting temperature, no assistant leaching agent, short leaching time, high vanadium leaching rate, and low energy consumption.
keywords: stone coal vanadium sulfuric acid roasting leaching
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基金项目:国家自然科学基金资助项目（51474162）
引用文本：
师启华,张一敏,刘 涛,黄 晶,付朝阳.硫酸焙烧对石煤提钒过程的影响[J].有色金属（冶炼部分）,2015(7):38-42.
Shi Qihua,Zhang Yimin,Liu Tao,Huang Jing,Fu Zhaoyang.Effect of Sulfuric Acid Roasting on Vanadium Extraction from Stone Coal[J].Nonferrous Metals (Extractive Metallurgy),2015(7):38-42.
师启华,张一敏,刘 涛,黄 晶,付朝阳.硫酸焙烧对石煤提钒过程的影响[J].有色金属（冶炼部分）,2015(7):38-42.
Shi Qihua,Zhang Yimin,Liu Tao,Huang Jing,Fu Zhaoyang.Effect of Sulfuric Acid Roasting on Vanadium Extraction from Stone Coal[J].Nonferrous Metals (Extractive Metallurgy),2015(7):38-42.
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