Vanadium is silvery white refractory metal with high melting point, malleability, hardness, no magnetism, hydrochloric acid and sulphuric acid resistance ability. And the properties of resisting gas, salt and water corrosion is better than most of the stainless steel. The application of vanadium called “metal vitamin”. The initial vanadium is mostly applied in steel. Through refining steel organization and grain, it can improve the grain coarsening temperature to increase strength, toughness and wear resistance of steel. Later, people gradually found the outstanding improvement of vanadium in titanium alloy, and applied in the field of aerospace to make breakthrough progress in the aerospace industry.

 

With the high-speed development of industry, tungsten resources are decreasing. The recycling of waste tungsten resources is receiving attention increasingly. The abandoned tungsten metal products often contain other valuable metal ingredients. Vanadium is one of them. In the tungsten recovery process, the waste vanadium and tungsten go into the sodium tungstate solution. Existing separation technology is not yet mature and easy to cause hundreds of loss of vanadium.

 

A process of recycling tungsten and vanadium from the waste tungsten metal realizes the effective separation of tungsten and vanadium. It uses the ion exchange method. Preprocess sodium tungstate solution firstly, and then use the resin through transformation to adsorb. Vanadium is adsorbed on the resin, and most of tungsten is kept in the effluent so as to achieve separation. Through this method we can draw the following conclusions: 

1. It is difficult to adsorb vanadium and tungsten trioxide for OH- resin. After transmitting Cl- resin, vanadium is easily adsorbed except for tungsten trioxide. 

2. Low pH is advantageous to the resin adsorption of vanadium. The influence of velocity on vanadium penetrating exchange capacity is very significant. This shows that resin exchange speed is slow. Only the low velocity can ensure the good adsorption property.

3. The higher vanadium concentration is, the better resin adsorption on vanadium is. Separation factor of tungsten and vanadium is greater.

 

In conclusion, adjust pH of sodium tungstate solution containing vanadium to 8-10 and let a certain type of resin through hydrochloride transformation adsorb. Vanadium can be adsorbed on the resin effectively. Most tungsten will not be adsorbed into the liquid, so as to achieve the goal of vanadium and tungsten separation. The removal rate of vanadium and recovery rate of tungsten have reached a higher level.