Method for preparing high-purity vanadium oxytrichloride through carbon-free low-temperature chlorination of vanadium-chromium slag

• Main Authors: ZHANG JIE, HE YANG, YAN BAIJUN, LI MING, LIU JIANHUA, GAO GUANJIN, ZHANG WENBO, MIAO QINGDONG
• Format: Patent
• Language: Chinese; English
• Published: 31.01.2023
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; METALLURGY

The invention provides a method for preparing high-purity vanadium oxytrichloride through carbon-free low-temperature chlorination of vanadium-chromium slag, and relates to the technical field of solid waste recycling. The method comprises the following steps: mixing the vanadium-chromium slag and a chlorinating agent, and carrying out heating reaction in an aerobic atmosphere to obtain vanadium oxytrichloride; the chlorinating agent comprises one or more of ferrous chloride, ferric trichloride and chromium chloride; the usage amount m of the chlorinating agent is m = X * Y * ms/, X is the chlorination coefficient, Y is the content percentage of vanadium trioxide in the vanadium-chromium slag, and ms is the mass of the vanadium-chromium slag; the utilization coefficient is represented by the following formula: in the formula, the particle size of the vanadium and chromium slag, the particle size of the chlorinating agent, the reaction temperature, the mass of the vanadium and chromium slag, the mass of the ch