Study on Natural Settlement Index Characteristics of Iron-Bearing Tailings Applied to Goaf Filling Treatment

In order to provide a technical basis for the subsequent concentration and utilization of tailings treatment process in an iron ore mine, achieve objectives cost reduction sustainable development, settling capacity slurry with initial 40% its natural state were tested conjunction pumping supply index beneficiation metal mine. The test results show that particles settle at overall fast rate: basically, within 10 20 min they are able reach or approach 85 99.5% final state-related index. During fixed container, first, clarified water top is very turbid. With passage time, gradually becomes blurred clear from turbidity, interface between clearer. From phenomena observed during parameters such as net increase variation, maximum indicators 50% 90% can be reached approached 5.5 7.25 10.5 15.5 after settling, process. As tests observations continued, relevant basically time period 1440 min, which tailing sand was 71.33 73.42% 1.85 1.91 g/cm3. It judged low meet specifications required filling process, dewatering save costs facilities flocculation chemicals, therefore has good economic feasibility.