Preparation method of V2O5 by vapour carbonizing pretreatment of vanadium-containing stone coal

• Main Authors: ZHANG SHUNXI, CHENG XIANZHONG
• Format: Patent
• Language: Chinese; English
• Published: 25.01.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a preparation method of V2O5 by vapour carbonizing pretreatment of vanadium-containing stone coal. The technical scheme comprises steps of smashing a vanadium-containing stone coal raw material to 100-200 meshes by a ball mill; mixing the mineral powder and concentrated sulfuric acid evenly in the ratio of 1: (0.2-0.4), and then adding 8-15% of 0.5-5 g/L of initiator solution in the mixture, and stirring for 20-30 min. A wet sand shaped mixture after stirring is loaded to a hopper truck through a conveying belt, and then pushed to a vapor carbonizing room to carbonize at 150-250 DEG C. The carbonized slag is performed with a two-stage process to leach vanadium according to the solid-to-liquid ratio of 1: (1-2), and the filtrate is blue solution; then over 99.5% vanadium pentoxide product can be obtained according to the preparation method of V2O5 by regular hydrometallurgy. The preparation method is free from ore roasting process and generation of waste gas, and is simple in process,