Research on Roasting Shaft Furnace for Vanadium Extraction from Stone Coal

Based on analyses on traditional stone coal roasting equipments,a roasting shaft furnace equipped with internal vertical air channels(IVAC) and drying bed for vanadium extraction from the stone coal was developed. Through comparison with the roasting shaft furnace for vanadium titaniferous magnetite,the unique structure characteristics of the roasting shaft furnace for stone coal was elaborated,and structural and operating parameters of the latter was given. Furthermore,the first roasting shaft furnace for stone coal in China was established on this basis. The practice shows that the roasting shaft furnace is a reliable and economical roasting equipment for vanadium extraction from stone coal. It has many advantages, including controllability of temperature and atmosphere in furnace,high utilization coefficient,low energy consumption per unit product,and high vanadium recovery rate. This paper aims at introducing a new furnace type for vanadium extraction from stone coal and promoting the development of vanadium industry.