A PARAMETRIC STUDY ON THE SULFURIC ACID LEACHING OF VANADIUM OF AN IRANIAN THERMAL POWER PLANT ASH

Vanadium recovery of Thermal Power Plant Ash (TPPA) is an attractive process which simultaneously satisfies the pollution control standards regarding TPPA disposal and provides a valuable source of vanadium for industrial demands. In the present research work, sulfuric acid leaching route has been employed for vanadium recovery from an Iranian TPPA. Effects of acid concentration, temperature, acid/TPPA ratio, leaching time as well as TPPA particle size on the leaching efficiency of vanadium have been investigated. Experimental results showed that leaching efficiency of vanadium is significantly affected by the leaching conditions. The results revealed that with acid concentration of about ۱۵%, temperature around ۷۵ °C, acid/TPPA ratio~۱۵, leaching time about ۱۲۰ minutes and particle size of ۷۵ - ۱۵۰ pm, almost ۹۲% of vanadium can be dissolved

Keywords:

Vanadium. Acid Leaching , Thermal Power Plant Ash