Low Temperature Sulfuric Acid Ripening-water Leaching for Vanadium Extraction from Stone Coal Vanadium Ore
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摘要:
这是一篇冶金工程领域的论文。以陕西某地含钒矿物为绢云母、伊利石的石煤钒矿为研究对象，采用低温硫酸熟化-水浸工艺提钒，考查了熟化温度、熟化时间、硫酸用量、氯化钠用量，浸出温度、浸出时间及浸出液固比对钒浸出率的影响。结果表明：向石煤钒矿中加入25%的硫酸、0.8%的氯化钠，在130 ℃下熟化8 h，熟化样品在浸出温度 55 ℃、液固比 1.5∶1的条件下浸出时间2 h，钒浸出率可达89%。这说明采用低温（130 ℃）硫酸熟化-水浸工艺提取石煤型钒矿是可行的。
Abstract:This is an article in the field of metallurgical engineering. The vanadium ore with vanadium containing sericite and illite in Shaanxi province was taken as the research object, low-temperature sulfuric acid ripening-water leaching process was used to extract vanadium. The effects of ripening temperature, ripening time, sulfuric acid dosage, sodium chloride dosage, leaching temperature, leaching time and liquid-solid ratio on vanadium leaching rate were investigated. The results show when 25% sulfuric acid and 0.8% sodium chloride are added to the stone coal vanadium ore, the sample is aged at 130 ℃ for 8 h, and the sample is leached at 55 ℃ for 2 h under the conditions of liquid-solid ratio of 1.5∶1, the vanadium leaching rate can reach more than 89%. This indicates that it is feasible to adopt low temperature sulfuric acid ripening and water leaching process to extract stone coal type vanadium ore.
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表 1 原矿多元素分析结果/%
Table 1. Multi-element analysis results of the ore
SiO2 K2O Na2O Al2O3 CaO MgO TiO2 SO3 BaO TFe MnO P2O3 V2O5 LOI 79.35 1.13 0.01 3.75 2.72 1.49 0.21 0.72 1.91 3.00 0.01 0.51 0.88 4.86 
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表 2 原矿钒价态分析结果
Table 2. Analysis results of vanadium valence state in the ore
名称 价态 V4+ V3+ 总钒 1#样品 含量/% 0.39 1.78 2.18 分布率/% 18.03 82.02 100.00 2#样品 含量/% 0.23 0.88 1.11 分布率/% 21.05 79.00 100 3#样品 含量/% 0.02 0.09 0.11 分布率/% 18.16 81.89 100
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表 3 原矿样品筛析结果
Table 3. Sieve analysis results of the raw ore
样品粒级/mm 产率/% V2O5品位/% 分布率/% +6 13.69 0.230 3.54 -6+3 16.28 0.270 4.94 -3+1.5 16.28 0.330 6.04 -1.5+0.9 5.92 0.410 2.73 -0.9+0.5 8.51 0.470 4.49 -0.5+0.1 8.88 0.650 6.49 -0.1 30.42 2.100 71.78 合计 100.00 0.890 100.00
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表 4 硫酸浸入不同程度能谱分析S结果/%
Table 4. S results of energy spectrum analysis of sulfuric acid immersed in different degrees
硫酸浸入 深 7.02 2.22 11.52 11.13 程度 浅 0.33 0.42 0.15 0.43
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