COMPLEX METHOD FOR REMEDIATION OF SOIL BEING CONTAMINATED BY HIGHLY CONCENTRATED HEAVY METAL

摘要

PURPOSE: A complex purifying method of high concentration heavy metal contaminated soil is provided to reduce the overload of acid washing by efficiently purifying heavy metals from contaminated soil of particles with various diameters. CONSTITUTION: A selective milling process is implemented with respect to contaminated soil of particles with at most 0.5mm diameters(PS3). A physical separating process is implemented based on a spiral type gravity separator and a vibration table type gravity separator. The spiral type separator includes soil outlets. A first soil outlet is in connection with the vibration table type gravity separator and discharges heavy metal contaminated soil of high gravity to the vibration table type gravity separator. A second soil outlet discharges heavy metal contaminated soil of low gravity. A third soil outlet discharges sludge or floated products.