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Trash to Treasure: Turning Steel-mill Waste into Bricks

Posted May 25, 2011 10:30 AM

From Eurekalert!:

Scientists are reporting development and successful testing of a promising new way of using a troublesome byproduct of the global steel industry as raw materials for bricks that can be used in construction projects. Their study appears in ACS' Industrial & Engineering Chemistry Research.

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Guru

Join Date: Nov 2009
Location: Izmir, Turkey
Posts: 2162
Good Answers: 31
#1

Re: Trash to Treasure: Turning Steel-mill Waste into Bricks

05/27/2011 5:28 AM

There are many different waste materials from slag to bag house dust.

In the US baghouse dust from an EAF is classified as hazardous waste. Don't think I believe what the story says.

Making bricks, roads of many other items is nothing new.

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Power-User

Join Date: Oct 2007
Location: Oregon, USA
Posts: 125
Good Answers: 6
#2

Re: Trash to Treasure: Turning Steel-mill Waste into Bricks

06/25/2011 8:45 PM

The key phrase in this dialogue is "A small amount of potentially toxic material came out of the slag-made bricks over time,".

this was also the statement made during this development over 20 years ago in the US and later the handlers of the EAF dust, laden with zinc, lead, cadmium and a few other toxic materials were found to cause cancer in the handlers of the dust.

If the total amounts of toxic materials can be guaranteed to be removed from the dust by the Waelz process then perhaps the balance of materials of Fe, Si, Al Ca, etc can be used as filler in making ceramics, or in non leachable cement products.

There are other technologies that can process the dust and recycle the materials but so far other than recovery of some of the products it is not fail safe, in my opinion, without very careful protection for the human aspect.

__________________
Thomas J. Coyne, Jr., President, T.C.Inc., (an international project development/consulting firm).
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