Electrowinning (sometimes abbreviated to EW, also known as Electrorefining) is the preferred method for the recovery of refined metals as high purity ingots. Electrowinning is merely electroplating writ large. Because it is designed to extract a particular metal from the solution, maintenance of the potential difference between the cathode and annode is important; the potential difference to extract copper is x volts. This can be calculated. In the process gas is liberated and must be dealt with. An ingot is a mass of metal or semiconducting material, heated past the melting point, and then recast, typically into the form of a bar or block. ... Electroplating is the coating of an electrically conductive item with a layer of metal using electrical current. ...

In electrorefining, a large (approximately 375kg) slab of copper is used as the anode; they are produced by the smelter casting molten copper into a mold. The shape of the anode is dictated by the electrolytic cells at the refinery. If used in solvent extraction then the anodes are a lead, calcium, tin alloy. Otherwise the anode is the smelted copper. Diagram of a zinc anode An anode (from the Greek άνοδος = going up) is the positive electrode in an electrolytic system or circuit. ... A refinery is a building and/or the equipment used for refining or processing specific products. ... General Name, Symbol, Number lead, Pb, 82 Chemical series poor metals Group, Period, Block 14, 6, p Appearance bluish white Atomic mass 207. ... General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Atomic mass 40. ... General Name, Symbol, Number tin, Sn, 50 Chemical series poor metals Group, Period, Block 14, 5, p Appearance silvery lustrous gray Atomic mass 118. ...

In electrowinning, the cathode is the electrical pole to which copper ions are attracted and then adhere. Cathodes may be made of stainless steel blanks or copper starter sheets. There's no particular reason for having a non-copper cathode, except the cathode can be reused melting off the copper, rather than fabricating a new copper cathode for each extraction. If a copper cathode was used, the electrolysis would need to commence soon after immersion in the fluid to prevent errosion. You'd want the copper cathode to be as pure as what you're extracting. Diagram of a copper cathode In chemistry a cathode is the electrode of an electrochemical cell at which reduction occurs. ... In metallurgy, stainless steel is defined[1] as a ferrous alloy with a minimum of 10. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance copper, metallic Atomic mass 63. ...

A copper electrowinning cell may accommodate multiple cathodes and anodes.

The pregnant leach solution is circulated through the electrowinning cell, an electrical current is applied and the copper plates out as electro-won cathode. Pregnant Leach Solution (PLS) is acidic copper-laden water generated from stockpile leaching and heap leaching. ...

Electrolysis is employed in the purification of copper. Impure copper is used as the anode of a cell in which the electrolyte is copper sulphate solution. Copper on the impure anode dissolves as aqueous copper ions (Cu₂+_(aq)). To prevent the solution becoming saturated, copper ions from the solution plate out on the cathode as pure copper (Cu₂+(aq) → Cu_(s)). The concentration of Cu₂+_(aq) ions in solution is steady. In chemistry and manufacturing, electrolysis is a method of separating bonded elements and compounds by passing an electric current through them. ... An electrolyte is a substance which dissociates free ions when dissolved (or molten), to produce an electrically conductive medium. ... Look up Dissolve in Wiktionary, the free dictionary The term dissolve has several meanings: In chemistry, it is specifically the process of creating a solution. ... Drinking water This article focuses on water as we experience it every day. ... The term saturation generally means thoroughly full, and can refer to the following: In chemistry, see saturation (chemistry) for a number of meanings. ...

As copper dissolves from the anode, a sludge of insoluble material collects at the bottom of the cell. This sludge often contains valuable non-reactive metals such as silver and gold, or at Olympic Dam, uranium. The recovery of these trace metals from the sludge makes the purification of copper more lucrative. A further advantage of electrolytic purification of copper is that the deposited metal is of high purity. General Name, Symbol, Number silver, Ag, 47 Chemical series transition metals Group, Period, Block 11, 5, d Appearance lustrous white metal Atomic mass 107. ... General Name, Symbol, Number gold, Au, 79 Chemical series transition metals Group, Period, Block 11, 6, d Appearance metallic yellow Atomic mass 196. ... Olympic Dam (30°27′ S 136°53′ E) is a Australian mining centre in South Australia - located some 550km NNW of Adelaide the capital city of South Australia. ... General Name, Symbol, Number uranium, U, 92 Chemical series actinides Group, Period, Block ?, 7, f Appearance silvery gray metallic Atomic mass 238. ... ...