emew Blog

10 Questions Answered About Electrowinning and Electrorefining

Posted by Alex Barshai on Apr 17, 2017 9:33:41 AM

1. What is electrowinning?

Electrowinning is a process in which metal ions present in an electrically conductive solution are separated using a direct current. This is achieved when a direct current is applied across an anode and cathode that are submerged in an electrically conductive solution causing the metal to deposit on the cathode. We say that metals like these were electrowon.
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Topics: electrowinning

3 Methods of Nonferrous Metal Recycling

Posted by Alex Barshai on Apr 10, 2017 2:37:54 PM

In a world which is increasingly demanding sustainability, nonferrous metal recycling has become a very important practice. Opting for recycling does not only mean being responsible towards the environment and reducing the carbon footprint, it is also a very reasonable business in industries that rely on using non-renewable resources.

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Topics: wastewater treatment, metal recycling, electrowinning

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: copper, electrowinning, emew

[VIDEO] emew Advanced Copper Liberators

Posted by Sonny Samra on Mar 28, 2017 12:33:53 PM
Thanks for joining me today for this discussion on emew advanced liberators. Let's start by looking at a simplified copper refining process flow diagram. Copper Concentrate is fed to the smelting process where fire-refined copper is produced. Next onto anode casting, where 99% anode copper is formed followed by electrorefining of copper to produce LME grade copper cathode. But we aren’t done there, the refinery bleed is then sent to copper liberators to control the copper concentration and impurities in the process. It is at this step, where we will focus our time today.
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Topics: electrowinning, mining, emew, Refining

emewBots - the Future of Mobile Metal Recovery Plants

Posted by Sonny Samra on Mar 21, 2017 3:49:44 PM
 
As modern society and technology move at a rapidly evolving pace each day, consumers and businesses are constantly searching for innovative methods to accomplish tasks more efficiently and conveniently. There are countless examples of technology mobilization that has led to increased efficiency and convenience, for both consumers and businesses, from stereos to the Walkman, typewriters to laptops, and rotary phones to cellular phones; all the innovations listed have enhanced the ease and productivity of many everyday tasks.
 
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Topics: electrowinning, emew

[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

Advanced Green Technologies for Wastewater Treatment

Posted by Alex Barshai on Mar 6, 2017 2:22:09 PM

Objectives of advanced green technologies

Advanced green technologies (AGTs) refer to a group of practical methodologies and materials based, among others, on non-toxic chemical processes, clean energies, and environmental monitoring to slow down or correct the negative impact induced by human activities.

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Topics: environmental, wastewater treatment, metal recycling, Waste water treatment, electrowinning

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: electrowinning, nickel, emew

Nickel Cathode Harvesting Demonstration

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

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