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 electrolytic chemical reaction. This takes place when an electric current is passed through the solution.
Is electrowinning same as electrolysis?
is that electrowinning is the electrodeposition of metals from their ores that have been put in solution or liquefied while electrolysis is (chemistry) the chemical change produced by passing an electric current through a conducting solution or a molten salt.
Why is electrowinning necessary?
While electrowinning is mostly used to recover non-ferrous metals such as copper, nickel, tin, cadmium or precious metals like gold, silver and platinum, it also has a usage in industries that require waste water treatment.
What happens during electrorefining of copper?
Electrorefining entails electrochemically dissolving copper from impure copper anodes into an electrolyte containing CuSO4 and H2SO4 and then electrochemically depositing pure copper from the electrolyte onto stainless steel or copper cathodes. The process is continuous.
What is the difference between electrorefining and electrowinning?
Electrowinning is the electrodeposition of metals from the ores that have been put in a solution via leaching. Electrorefining is the electrodeposition of metals from the ores that have been put in a solution to remove impurities from the metal ore.
What is the purpose of electrorefining?
The main purpose of electrorefining is to purify the metals. To understand how this process occurs we first know about electrolysis. Electrolysis is the process in which an electric current is passed through a substance to effect a chemical change.
Does electrowinning require electricity?
In electrowinning, metal is deposited from solution onto cathode blanks by application of a direct electrical current according to equation (1). In a competing reaction, hydrogen ions are reduced to gaseous hydrogen according to (2).
What are the applications of the CU that was obtained from the electrowinning process?
Collection. Pre-processing and sorting. Crushing and shredding. Physical separation.
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.
What is electrorefining process?
Electrorefining is a process in which materials, usually metals, are purified by means of an electrolytic cell. The anode is the impure metal and the cathode is a very pure sample of the metal (http://www.sparknotes.com/chemistry/electrochemistry/intro/terms/term_B.3.html).
What is electrorefining with example?
Definition of electrorefining : refining of a metal (such as copper) by electrolysis, the crude metal used as the anode going into solution and the pure metal being deposited upon the cathode. — called also electrolytic refining.
What do you mean by electrorefining?