Method of waste disposal
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United States of America Patent
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-
May 6, 1997
Grant Date -
N/A
app pub date -
Jul 14, 1995
filing date -
Nov 15, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for solidifying industrial waste containing various toxic metals and other substances without fail and stabilizing the waste so as to prevent the toxic metals, particularly lead, from leaching out. The method comprises mixing a waste containing calcium compounds such as hydroxide, oxide and chloride of calcium with a treatment mainly comprising water glass, adding, if necessary, water hereto to adjust the total water content to 25-75 parts by weight per 100 parts by weight of the waste, kneading the resultant mixture, and aging the same for at least 6 hours in a temperature range of 40.degree. to 100.degree. C., preferably by utilizing the waste heat of a waste incinerator.
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