Method for extracting vanadium from vanadium-containing stone coal through calcium additive

• Main Authors: CHEN TIEJUN, ZHANG YIMIN, WANG BO, LIU TAO, HUANG JING
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• 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 method for extracting vanadium from vanadium-containing stone coal through a calcium additive. According to the technical scheme of the method, the calcium additive and vanadium-containing stone coal raw ore are prepared, evenly mixed and finely ground and are roasted for 1.5 h to 2.5 h under the temperature ranging from 700 DEG C to 1000 DEG C, wherein the mass ratio of Ca in the calcium additive to the vanadium-containing stone coal raw ore is (0.032-0.089):1; a roasted product discharged out of a furnace is directly thrown into a leaching agent to be cooled, first-section solid-liquid separation is conducted, and first-section leaching liquid and first-section cooling slag are obtained; H2SO4 with the volume concentration ranging from 10% to 25% is put into a stirring leaching tank, the first-section cooling slag is added according to the liquid-solid mass ratio of (1-2.5):1, CaF2 is then added, the adding amount of the CaF2 is 3 wt% to 8 wt% of the vanadium-containing stone coal