emew Blog

[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

Nickel Cathode Harvesting Demonstration

Posted by Alex Barshai on Feb 23, 2017 11:10:58 AM
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Topics: emew, nickel, electrowinning, Refinery Optimization

Low Grade Better Than High Grade… Tell That to My Former Teachers

Posted by Sonny Samra on Feb 10, 2017 2:15:36 PM

A brief history of grading

William Farish was a tutor at Cambridge University in England in 1792, and, other than his single contribution to the subsequent devastation of generations of schoolchildren, is otherwise undistinguished and unknown by most people.
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Topics: copper, electrowinning, Refinery Optimization

Liberating Copper and Nickel: A True Story

Posted by Dora Ip on Nov 10, 2016 5:21:07 PM

What pops into your mind when you see the word, "liberation"?

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The word liberation comes from the latin word, liberatus, which literally means "to set free" or "to deliver", and can easily apply to myriad of different topics from politics and religion to science and industry.

Particularly in the copper industry, the word liberation applies to the act of freeing copper specifically from refinery bleed electrolyte. The process that starts with mining and carries on through smelting and electrorefining is complex with many process operations.  Let's take a closer look at the story of 'liberating copper'.  

On average, mined ore contains about 1% copper and in order to recover this copper from the rock it requires several physical and chemical processing and refining steps in order to produce market ready copper metal.

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Topics: copper, nickel, Refining, Refinery Optimization

Cracking The Operational Efficiency Code

Posted by Alex Barshai on Sep 13, 2016 9:00:00 AM

When we talk about operational efficiency, what do we really mean? All of us are looking to improve overall corporate performance, but how do we clearly define this?  In order to deliver services or goods in the most cost and time efficient manner, we strive to improve operational efficiency, which is frequently described as a ratio between what we put into the business and what we gain as the output.

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Topics: mining, Refinery Optimization

Electrowinning 102: Electrowinning of Silver

Posted by Alex Barshai on Jun 2, 2016 11:12:01 AM

While silver is definitely a precious metal, the usages of this metal are much wider than just the jewelry industry. Silver is a great electro-conductor which makes it a beneficial metal in the manufacturing of electrical and electronic components. Silver is a cost-effective and well performing metal for the industry. For example, it can be used in copper or brass connectors in order to increase conductivity. In other cases, silver is used as an anti-tarnishing plating and can prevent scratches and retain the attractiveness of parts.

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Topics: electrowinning, Refinery Optimization

Electrowinning 101: What is electrowinning?

Posted by Alex Barshai on May 24, 2016 12:30:20 PM

Electrowinning is a widely used technology in modern metal recovery, mining, refining and waste water treatment applications. Electrowinning is one of the oldest electrolytic processes known and was first introduced in 1807 by English chemist Humphry Davy. After 66 long years the first commercial refinery Balbach and Sons Refining and Smelting Company adopted the electrowinning technology and shortly after became the second largest metal processing company in the United States.

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Topics: electrowinning, Refinery Optimization