Method of asbestos detoxification

摘要

An asbestos detoxification method comprising a step B1 of impregnating an existing asbestos layer with an asbestos melting agent and detaching the existing asbestos layer; a step B2 of pulverizing the existing asbestos layer; a step B3 of loading the pulverized material obtained in step B2 into a melting furnace; a step B4 of heating a resin subsidiary material used in the disposal of the asbestos layer to vaporize the resin portion thereof and further converting the vaporized resin portion into plastic oil; a step B5 of combusting either or both of the plastic oil obtained in step B4 and a fuel; and a step B6 of heating and melting the pulverized material that is in the melting furnace with the use of the heat obtained in step B5. By this detoxification method, it is possible not only to detoxify asbestos sprayed onto a surface of a base material such as a base material of a building, or asbestos-containing building material at low energy, but also to detoxify and recycle various subsidiary materials that are used in the detoxification and are required to be disposed of as specially controlled industrial waste, at the same time.

主权项

1. An asbestos detoxification method for disposing of an existing asbestos layer sprayed onto a surface of a base material, the method comprising:
a step C1 of impregnating an existing asbestos layer sprayed onto a surface of a base material with an asbestos melting agent and then detaching the existing asbestos layer from the surface of the base material, wherein the asbestos melting agent is at least one calcium compound selected from the group consisting of calcium fluoride, calcium carbonate, calcium oxide, and calcium hydroxide; a step C2 of pulverizing the detached asbestos layer and a resin subsidiary material used for disposal of the asbestos layer; a step C3 of heating the pulverized material obtained in step C2 to vaporize a resin portion thereof and to separate the resin portion from an asbestos portion; a step C4 of loading the asbestos portion separated in step C3 into a melting furnace; a step C5 of converting the vaporized resin portion into plastic oil and combusting either or both of the oil and a fuel; and a step C6 of heating and melting the asbestos portion in the melting furnace using the heat obtained in step C5.