New Process for Extracting Vanadium from Stone Coal Fluidized Combustion Ash Acid Leaching-Intermediate Salt Method
The new process for extracting vanadium from the coal- fired ash (or stone coal ) acid leaching-intermediate salt method proposed by Zhejiang Research Institute of Chemical Industry is shown in the following figure.
Figure Acid leaching - intermediate salt method for vanadium extraction process
The main technical and economic indicators obtained in the semi-industrial test are: V 2 O 5 leaching rate 93.69%, intermediate salt recovery rate 99.07%, extraction rate 98.10%, stripping rate 98.16%, ammonium metavanadate precipitation rate 99.0%, V 2 O 5 total recovery rate is greater than 80%. Product quality in line 98 metallurgical requirements, 30.46t sulfuric acid consumption per tonne of product, P204 7.5kg, TBP60kg, kerosene 60kg, ammonia 9.09t, 20T of steam, electricity 8000kW · h, 48 byproduct ammonium alum.
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