Cemented filling body exposed to acid mine water or high salinity mine water will be subjected to various kinds of physical and chemical attack. In this paper, the burning process of a modified special cement clinker used for corrosion-resisting cementitious material in fill mining is studied by means of TG-DTA, XRD, and chemical method. The main minerals of this kind of clinker are C3S, C2S, C4A3, and C4AF. The optimal firing temperature range of the clinker is from 1300°C to 1380°C, and a suitable amount of F- and SO3 in raw meals is helpful to the coexistence of C3S and C4A3in the clinker.

The cementation technology to deal with the mine tailings is adding cementation material and then dehydrating tailings and piling on suitable spot. In order to find the law of the mixing ratio of the cementitious material of the mine tailings of Xishimen Iron Mine, Portland cement and cementitious material A are selected to be compared in the experiment of strength test of cementation of the mine tailings of Xishimen Iron Mine. The result shows that both kinds of cementitious materials can meet the needs when the mixing ratio is 2-3%, but the cementation performance of material A is better than Portland cement. The experiment of adding admixture to improve the cementation performance of material A is carried and the result shows that Na2CO3 and KAl(SO4)2•12H2O can improve the strength of cemented whole tailings while Na2SO4 , CaSO4 and Na2SiO3is helpless to improve the strength.

Bittern-resisting cement (BR) has more excellent performance to resist physical attack and chemical corrosion in high-concentration brine environment than ordinary Portland cement or sulfate- resisting Portland cement. The durability and chemical stability of bittern-resisting cement are studied under drying-wetting cycles in brine, the microstructure and chemical component of hydration products also are determined by SEM/EDXA. The corrosion resistance coefficient Kf of BR mortar prisms in high-concentration brine for 6 months is over 96%, and the mass loss of mortar prisms after 30 drying-wetting cycles in brine is only 4.3%. SEM/EDXA analysis shows that the microstructure and chemical composition of BR hydration products exposed to high-concentration brine environment is more densely and stable than those of ordinary Portland cement.