A process (100) for treating spent lithium ion batteries (102) to recover metals is disclosed. The process includes discharging (104) the spent lithium ion batteries (106). The discharged lithium ion batteries are shredded 106) and roasted (108) in a furnace to produce roasted material. The roasted material is sieve...

A method (100) for producing precipitated silica is disclosed. The rice husk ash is incinerated (102) at a temperature of 900-1025oC to remove volatile substance and leached (104) with caustic soda flakes. The slurry is vacuum filtered (106) to separate leach cake and sodium silicate solution. The leach cake is wash...

METHOD TO EXTRACT VANADIUM FROM VANADIUM BEARING SLAGS Abstract A process (100) for extracting vanadium from vanadium bearing slag is disclosed. The process includes oxidative roasting (102) at high temperatures in the presence of air followed by pulverization (104) of the roasted mass to obtain fine particles 1...