emew Blog

[VIDEO] Why some metals are easier to electrowin than others?

Posted by Sara Wollschlaeger on Mar 21, 2018 12:42:21 PM
Why is it easy to electrowin some metals, and almost impossible to electrowin others?
In a few minutes, I will explain why. The answer lies in the Electrochemical Series, and its relation to electrowinning.
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Topics: electrowinning, General

Silver Recovery from Scrap and Low-Grade Residue

Posted by Sara Wollschlaeger on Dec 19, 2017 10:19:40 AM
Due to the increase in electric and electronic equipment (EEEs), high-purity silver continues to be in high demand. For the past 4 years, silver demand has exceeded silver mining production, but the global supply has nearly met the demand each and every year – thanks to silver recovery and silver refining. Silver recycling will also be critical to meet future demand, especially as we see the general demand of metals increase across the globe, in relation with technological growth. High-purity silver can be produced from silver refining and silver recycling by utilizing a series methods and processes, such as silver electrowinning and electrorefining. I’d like to delve into how these processes are carried out, and the outlook for silver production.
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Topics: metal recycling, electrowinning, emew, Refining, metal powders

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, Refinery Optimization

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, 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: copper, electrowinning, emew, Refinery Optimization

[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, Refinery Optimization

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, General

[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

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, Industrial Waste & Water

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, Refinery Optimization