When the mass concentration of sand discharged from the filling industrial pump accessories, industrial filling pump accessories, and tailings paste filling pump accessories in Shijiazhuang, Hebei reaches 60%, the slurry as a whole is in the form of paste, with good flowability, less prone to segregation, and a bleeding rate of less than 5%; (3) The ultra-fine tailings slurry and cement are fully mixed in the mixing system, achieving efficient utilization of cement, good homogenization effect of slurry, and high quality of paste filling by filling industrial pumps and industrial filling pumps. The strength of paste filling by filling industrial pumps and industrial filling pumps is higher than 1 MPa after 3 days. The high-quality filling of ultra-fine tailings by industrial pumps and industrial filling pumps for paste filling has been achieved, laying a solid foundation for the construction of tailings free mines Due to the increasing fineness of tailings and increasingly strict environmental policies and regulations, some domestic mines have begun to adopt the development model of "graded fine tailings filling industrial pumps and industrial filling pumps for paste filling, and comprehensive utilization of coarse tailings" However, changes in the grading of tailings will inevitably lead to thickening of tailings, as well as changes in the strength of the paste filling material transported by filling industrial pumps and industrial filling pumps In view of this, filling industrial pumps and paste filling experiments were conducted on graded fine tailings from a certain gold mine The experimental results show that compared with full tailings, the content of particles below 25 μ m in graded fine tailings increased by 17.18%, and the content of particles above 150 μ m decreased by 7.61%; The thickening efficiency of graded fine tailings is lower than that of whole tailings. Compared with whole tailings, the feed quality concentration of graded fine tailings decreased by 2.65 percentage points, the flocculant addition increased by 10g/t, and the processing capacity decreased by 0.23t/(m ^ (2) · h); The transportation performance of graded fine tailings filling industrial pumps and industrial filling pumps for paste filling slurry is inferior to that of full tailings filling industrial pumps and industrial filling pumps for paste filling slurry. The flow rates of paste filling slurry in filling industrial pumps and industrial filling pumps are 1.47m/s, 2.06m/s, 2.45河北石家庄充填工业泵配件、工业充填泵配件、尾砂膏体充填泵配件流放砂质量浓度达到60%时,料浆整体呈膏体状,流动性好,不易发生离析,泌水率小于5%;(3)超细尾砂料浆与水泥在搅拌系统中充分混合,实现了水泥的高效利用,料浆均质化效果好,充填工业泵和工业充填泵进行膏体充填质量高,充填工业泵和工业充填泵进行膏体充填体3 d强度均高于1 MPa.实现了超细尾砂高质量充填工业泵和工业充填泵进行膏体充填,为无尾矿山建设奠定了坚实的基础. 受尾砂细度的增加和环保政策法规要求日趋严格的影响,国内部分矿山开始采用"分级细尾砂充填工业泵和工业充填泵进行膏体充填,粗尾砂综合利用"这一开发模式.然而,尾砂级配的改变必然会引起尾砂浓密,充填工业泵和工业充填泵进行膏体充填料浆输送以及充填工业泵和工业充填泵进行膏体充填体强度的变化.鉴于此,针对某金矿分级细尾砂开展了充填工业泵和工业充填泵进行膏体充填试验研究.试验结果表明:相比于全尾砂,分级细尾砂中25μm以下颗粒含量增加了17.18%,150μm以上颗粒含量减少了7.61%;分级细尾砂浓密效率不及全尾砂,分级细尾砂相比全尾砂进料质量浓度降低了2.65个百分点,絮凝剂添加量增加了10g/t,处理量降低了0.23t/(m^(2)·h);分级细尾砂充填工业泵和工业充填泵进行膏体充填料浆输送性能不及全尾砂充填工业泵和工业充填泵进行膏体充填料浆,在充填工业泵和工业充填泵进行膏体充填料浆流速1.47m/s,2.06m/s,2.45