| 简介 |
PROBLEM TO BE SOLVED : To provide a reclamation treatment method and reclamation treatment system of an earth and sand-waste mixture for reliably removing wastes from earth and sand mixed with the wastes and at the same time efficiently reusing the earth and sand.
SOLUTION : The reclamation treatment method of an earth and sand-waste mixture involves the first step of selectively separating large size wastes from the earth and sand-waste mixture in dry state, the second step of adding water to the earth and sand-waste mixture subjected to the first step and classifying the mixture into pebble-coarse sand containing medium sized wastes and slurry type earth and sand containing small-sized wastes, the third step of washing the pebble-coarse sand classified in the second step with water and separating the middle size wastes from the pebble-coarse sand, the fourth step of classifying the slurry type earth, and sand classified in the second step into sand-fine sand and silt and thereafter obtaining washed soil by washing the sand-fine sand with water and thereby separating the small size wastes from the sand-fine sand, and the fifth step of obtaining dewatered cakes by press dewatering the precipitates obtained by flocculating and precipitating the silt classified in the fourth step.
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