Posted by Ray in TX [70.196.71.75] on Thursday, December 17, 2015 at 10:28:23 :
In Reply to: Re: Sand, soda, dry ice, plastic beads, pecan shells posted by Franz [24.149.37.138] on Wednesday, December 16, 2015 at 13:22:17 :
I see I typed monoxide when I meant to type dioxide.
In the plants Polar Blast uses several tons of pea sized CO2 media to blast piping and exchangers. There is no marking like sand makes on the surface, and the only debris to clean up is the paint and rust or scale removed, when sublimation occurs there is a noticeable drop in the temperature. While generally not very toxic, the out gassing from the blasting can cause hypercapnia (abnormally elevated carbon dioxide levels in the blood). Because it sublimes into large quantities of carbon dioxide gas, which could pose a danger, blasting with dry ice should only be in well-ventilated or open areas.
But I will say it might be a viable method, when the +/- negative 100 degree ice hits the surface and sublimates it might shatter the stone/block like when the heat of a laser makes a etched or blasted like finish on glass when used for engraving.
What 70% is wrong and please educate me and the others that read the forum, just saying 70% doesn't help anyone make an educated decision. Thanks
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