Reduced leaching of heavy metals from incinerator ashes

Details Reduced leaching of heavy metals from incinerator ashes Reduced leaching of heavy metals from incinerator ashes

1991-08-08

1993-09-14

Bell, Mark L.

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

588236, 588252, 588256, 588901, 106792, 106793, 106811, 501155, 405128, C04B 202, C04B 1408, C04B 1804

Patent

active

052451216

ABSTRACT:
A waste material which contains chromium and/or lead impurities is treated by mixing the waste material with diatomaceous earth and/or sodium borate and then heating the mixture in a free oxygen containing gas at about 500.degree.-1500.degree. C., preferably in the presence of steam.

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