石煤直接酸浸实验研究

Abstract

Abstract: Results of direct leaching vanandium from stone coal with H₂SO₄，HCl，HNO₃，and H₃PO₄ were compared，and effects of H₂SO₄ concentration，leaching temperature，leaching time, and dosage of helper leaching agent CaF₂ on leaching rate were studied.Results indicated that under the optimal conditions of H₂SO₄ mass fraction of 30%，leaching time of 6 h， leaching temperature of 90 ℃，liquid to solid ratio of 4∶1（mL/g），and agitation speed of 400 r/min，vanadium leaching rate was 63.48%.Under those above conditions，adding 3%（mass fraction） CaF₂as helper leaching agent，vanadium leaching rate could reach 90.32%，and leaching time could be also reduced to 2 h.

Key words: stone coal, vanandium, acid leaching, leaching rate

CLC Number:

TQ135.11

HE Dong-Sheng, XU Xiong-Yi, CHI Ru-An, WEI Dang-Sheng, ZHANG Li-Min, LUO Ren, WEI Zu-Hua. Study on direct acid leaching of stone coal[J]. INORGANICCHEMICALSINDUSTRY, 2012, 44(8): 22-.

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Inorganic Acid-Base-Salt Committee of CIESC

Study on direct acid leaching of stone coal

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