emew Blog

Trevor Bergfeldt

Recent Posts

Case Study of emew Silver Process versus Conventional Electrorefining

Posted by Trevor Bergfeldt on Jan 8, 2019 9:16:39 AM

Silver refining is a critical part of any precious metals refinery.  Often the higher value metals such as gold and the Platinum Group Metals (PGM’s) are associated with silver, which must be recovered separately as a by-product. 

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Prices of emew revealed: How much does a 600 t/a electrowinning plant cost?

Posted by Trevor Bergfeldt on May 15, 2018 8:55:04 AM

One of the most important and frequently asked questions we get is “How much does an emew plant cost”? The cost obviously depends on the size of the emew plant, so to answer this question we need to know how many electrowinning cells are required, which depends on several factors.

 

In this blog, I will discuss some of the key factors we take into consideration when sizing an emew electrowinning plant and provide some examples for three different applications. 

 

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Can I recover copper from this? Copper recovery from the ground up

Posted by Trevor Bergfeldt on Oct 19, 2017 9:45:13 AM

A question that we hear from Clients every day is "Can I recover (copper - or other metals) from this?"  The material in question can be concentrated wastes, dilute effluents, ores, concentrates, residues, plating baths, bleed streams and so on.  It seems like a very easy and straightforward question to answer, and in some cases that is true.  In other cases, however, the answer is a bit more complicated requiring some additional information.  Let's take a closer look at the good, the bad, and the ugly when it comes to the common question "Can I recover (copper - or other metals) from this?"

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Topics: copper, mining, environmental, metal recycling, effluent treatment, Wastewater Treatment, Refinery Optimization

Applications of Copper Electrowinning

Posted by Trevor Bergfeldt on Apr 4, 2017 12:47:28 PM

The electrowinning of copper is an electrolytic process that uses electricity to recover dissolved copper from solution as copper plate, also known as ‘cathode’.


Cu2+(aq) + 2e- -->Cu(s)        (E= +0.34V)

 

Copper easily dissolves in acids including sulphuric, nitric and hydrochloric. Recovering copper cathode from acidic sulphate solutions using electrowinning is a well-known and fairly straightforward process that has been in commercial use since the late 19th century.

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Topics: electrowinning, copper, emew, Refinery Optimization

[VIDEO] Basics of Electrowinning

Posted by Trevor Bergfeldt on Mar 14, 2017 4:48:14 PM

Electrowinning is known as an electrolytic process because it involves electrodes submerged into an electrolyte.An electrolyte is simply a conductive solution formed by dissolving positively and negatively charged ions. 

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Topics: electrowinning, emew, Refinery Optimization

Electrowinning Nickel: The Moody Metal

Posted by Trevor Bergfeldt on Feb 28, 2017 4:10:49 PM

Electrowinning is the process of ‘winning’ dissolved metals from solution by passing an electrical current through an electrolyte containing said metal.  The fundamentals of the electrowinning process have been discussed in a previous blog.  The relative ease of recovery depends on the electrochemical potential of the target metal relative to Standard Hydrogen Electrode (SHE) which is defined by the following reaction:

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Topics: emew, nickel, electrowinning, Refinery Optimization