Electrowinning of platinum using a modified cyclone cell was performed. It shows the effect of flow rate, which is correlated in terms of linear velocity solutions at an applied potential of 2V and PH of 3. Here the linear velocity of the ratio of the flow rate to the cross sectional area of inlet in the cyclone cell. The concentration of platinum drops exponentially high rate, due to a turbulent nature while linear like shapes appear for the laminar flow case of 0.6 ms-1, and the rate of removal of platinum from the solution increases with the flow rate.
Platinum is the most effective metal for any electrowinning process due to its current conducting property. Platinum being the most expensive material rational utilization of Platinum for the greater value ensures economical solution. Platinum covered Anodes is none but a rational utilization of platinum by plating limited quantity on to titanium to achieve the same result as using platinum metal.
The platinized anode is characterized by its three outstanding effects as an electrode material:-
1. It is stable, corrosion resistant and can be used in various media.
2. For the oxygen evolution reaction, the over potential is very high
3. For the hydrogen evolution reaction, the over potential is very low.
What is the process of electrowinning?
Electrowinning (or electroextraction) is a process of whereby metals, such as gold, silver and copper,are recovered from a solution by means of electrolyticchemical reaction. This takes place when an electric current is passed through the solution.
Why is electrowinning used?
Electrowinning is most commonly used to recover gold, silver, copper, cadmium, and zinc. Gold and silver are the most successfully recovered metalsbecause of their high electropotential. Chromium is the only metal commonly used in electroplating that is not recoverable by electrowinning.
What is the Difference between Electrowinning and Electrorefining?
Electrowinning is defined as the process in which the metals from their ores are put in the solution that is they are electrodeposited to liquefy the metals.
Whereas in electrorefining, it is defined as the process in which the impurities from the metal are removed.
