The tailings of Daye Iron Mine have large output,low comprehensive utilization rate and safety risk.Based on the research on the performance of new tailings in Daye,the comprehensive utiliza-tion direction is put forward.The results show that the tailing density is 3.20 g/cm3,the loose density is 1.25 g/cm3,the dense density is 1.47 g/cm3,the loose porosity is 61％,the dense porosity is 54.1％,the aver-age particle size of the tailing is 2.626 μm,and the grading is poor.The tailing is rich in a large amount of Fe and SiO2,while the contents of harmful elements S and P in the tailing are less than 0.1％,there is no radio-active pollution,and the tailing is rich in Ti,V,Cr,Ni and other associated elements,which belongs to the iron tailings of low calcium,magnesium,aluminum and silicon.In tailings filling,15 million anionic floccu-lant is used as flocculant,the dosage of flocculant is 40 g/t,the recommended filling concentration is 76％,and the ratio of lime to sand is 1:8.The tailings of new ores in Daye are recycled by recovering valuable ele-ments and minerals,filling mined-out areas,and being used as elemental fertilizers and soil amendments.
tailing performanceslurry characteristicscomprehensive utilization of tailings
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