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Previous by Date: Subject: Re: [DCHAS-L] Advice on our new science building Date: October 13, 2012 8:33:18 AM EDT Author: ACTSNYC**At_Symbol_Here**CS.COM |
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Maybe they don't need to be separated. It would be possible to use the lead glass as a raw material for metal enamels and ceramic glazes for ware that is not for food such as flower pots, statues, gewgaws, etc. When ground up, this material is just a "frit" that will supply silica, lead, sodium, and some other minerals to a glaze or enamel. Once it is analyzed, it is only necessary to add those minerals that will cause the mixture to melt at the right temperature and put in the colorants. Easy for any glaze chemist.
I wonder if someone hasn't already utilized this source. Its free.
It would probably end up in schools and hobby shops so I would fight against it's use for these products. But industrially, lead glazes and enamels are common. Lead frits are big business in ceramics. Hmmm. Maybe that's what they are doing in China with this stuff. A lot of the lead glazed wear comes from there.
We know they melt out the lead, cadmium, and other metals out of the computer waste, cast this metal mixture into things and send them back to us. The real kicker was when we found so much children's jewelry and trinkets were made with this mother board alloy. But the CPSC only catches a small amount. The rest gets in so its worth it to them to keep doing it.
Things should get better because the EU bans electronics made with lead, cadmium, mercury, and chromium. There are plenty of other solder alloys that will work just fine. So the new solder metals will be safer for making into children's products! The real question is: why are we all using electronics that can't even be sold in Europe and some other countries?
Monona
In a message dated 10/12/2012 9:36:49 AM Eastern Daylight Time, kimibush**At_Symbol_Here**EHRS.UPENN.EDU writes:
Now the challenge for the processors is to separate the lead from the glass so that the two can be re-used as separate elements, thereby ending the haz-mat problem.
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