emew Blog

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

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

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

Nickel Cathode Harvesting Demonstration

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

Video of emew Lab Cell Test

Posted by Alex Barshai on Dec 9, 2016 3:35:02 PM

Lab tests such as this are an ideal way to demonstrate the recovery capabilities of emew for a variety of electrolytes and feed materials. In most cases, these tests can be done right at your site so you can see the results for yourself.

This particular test is to demonstrate the recovery of copper cathode from a copper sulphate feed solution.  We can test a range of feed materials to recover not only copper, but also silver, nickel, tin and others.  This copper sulphate solution was prepared ahead of time and roughly 3L transferred to the feed tank.

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Topics: copper, electrowinning, emew, General

Infographic: Your Clear way to emew

Posted by Dora Ip on Nov 7, 2016 1:50:38 PM

As with many things, sometimes we need a map to guide us to our chosen destination. Same can be said for metal recovery. Have you found yourself with a throughput of material that you know has salvagable metals in it, such as copper, silver, tin, or nickel? ...while also scrambling to figure out who you need to talk to for your metal recovery needs?

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Topics: emew, General

emew Power Consumption

Posted by Alex Barshai on Oct 17, 2016 10:33:04 AM
A common question we get here at emewCorporation is:  “What is the power consumption of emew electrowinning technology”.  This is a very important question because power consumption is one of most significant costs involved in electrowinning, regardless of whether it is conventional or emew. 
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Topics: copper, emew, General