Method of waste disposal
AssigneeKanegafuchi Kagaku Kogyo Kabushiki Kaisha
InventorsTakuji Nomura, Hidekazu Kuromatsu, Masakazu Uekita
Life of this patent
Estimating the term…
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.
Claims28
A waste treatment method, comprising the steps of:
- mixing ash and fly ash resulting from incineration of waste containing calcium compounds such as calcium hydroxide, calcium oxide, and calcium chloride with a treating agent composed mainly of water glass solution and optional water such that the total amount of water is 25-75 parts by weight for 100 parts by weight of the ash and fly ash resulting from incineration of waste;
- and
- kneading the resulting mixture.
A waste treatment method, comprising the steps of mixing waste containing calcium compounds such as calcium hydroxide, calcium oxide, and calcium chloride with a treating agent composed mainly of solid water glass and optional water such that the total amount of water is 25-75 parts by weight for 100 parts by weight of the waste;
- and kneading the resulting mixture.
Dependencies are inferred from the claim text.