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[GreenYes] Re: industrial low thermal expansion waste



Foundry sand is usually clean if the foundry collect sand directly to
Silos at the end of the process. Usually from ghisa foundry you find
65% of SIO2 and 20% of FeO2

Cement industry use it a lot. If you want to use this sand you have to
remember that there's an high organic composistion - bentonite - and
it's considered environment polluting.

For more details or for ask for waste check
http://www.wastexchange.co.uk


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