| 摘要 |
PURPOSE: A disposal system of heavy metal-contaminated soil is provided to improve removal rate of heavy metals and disposal efficiency of soil even the soil is contaminated by high concentrated heavy metals. CONSTITUTION: A disposal system of heavy metal-contaminated soil comprises the steps of: separating first contaminated soil and uncontaminated soil by first-granularity-separating the heavy metal-contaminated soil (s100); separating second contaminated soil and third contaminated soil which contain pieces of heavy metal by second-granularity-separating the first and second contaminated soil after disintegrating the separated first contaminated soil (s200); separate-collecting first purified soil and a first heavy metal mineral by using a gravity concentration after pulverizing the second contaminated soil, and separating fourth contaminated soil having particles of under a fixed size and fifth contaminated soil having particles of over a fixed size from the third contaminated soil by using a wet type hydrocyclone after pulverizing the third contaminated soil (s400); and separate-collecting second purified soil and a second heavy metal mineral by a floatation of the fifth contaminated soil (s500). [Reference numerals] (AA) Heavy metal-contaminated soil; (BB) Uncontaminated soil; (CC,DD) First to second contaminated soil; (EE,HH,II) Third to fifth contaminated soil; (FF,JJ) Second purified soil; (GG,KK) First to second heavy metal mineral; (s100) First granularity separation; (s200) Disintegration and second granularity separation; (s300) Pulverization and gravity concentration; (s400) Pulverization and wet cyclone; (s500) Floatation |
