Salt Roast Process

The salt roasting process, or roast-leach process is the direct extraction of Vanadium from Titaniferous Magnetite ore. It is a multi-step process of crushing-milling-roasting-leaching-precipitation and calcination to produce only Vanadium in the form of Vanadium Pentoxide (V2O5) flakes. Ore is finely crushed and milled to micron size, then roasted in a kiln with added sodium salt to form water-soluble sodium vanadate. It is then leached using water, and the pregnant solution is precipitated by adding Ammonium Chloride and forming Ammonium Metavanadate (AMV). The AMV is further calcined (heated up) to form high purity V2O5 material.