Abstract: The tailing's cementation and discharging technology is adopted to deal with the mine tailings of Xishimen iron ore, so that tailings dam does not need to build. The cementation of tailings mainly includes the process of pumping sand, adding cementation material, tailings' dehydrating, and piling after dehydration. Through the laboratory tests and the industrial experiments, the applicable cementation material is optimized and the mixing ratio and the technical parameters of dehydration equipment are obtained. According to the results, the systematic optimal plan of tailings cementation and discharging system with capacity of 500,000 t/a is put forward. According to the tests and calculation, the overall costs of tailings' cementation and discharging of Xishimen iron ore are lower than the costs of discharging tailings. In addition, this technology does not require the construction of the tailings dams, meanwhile it can also treat the collapse area, with great economic and social benefits brought.

Key words: Tailings, Cementation of cementing material, Dehydration, Discharge