Effect of Stirring Parameters on Flow Characteristics and Strength of Potash Salt Filling Slurry
In order to improve the quality of the tailing salt filling slurry and achieve the low-cost and high-quality filling of tailing salt in the mine,the influence of mechanical stirring factors on the quality of tailing salt filling slurry was studied.The stirring effect of filling slurry under different stirring conditions was investigated by analyzing the expansion degree,slump and the strength test results of 3 d,7 d and 28 d under different stirring time and different stirring speed.The results show that with the increase of stirring speed and stirring time,the homogeneity of the tailing salt slurry is improved,and the large particles in the slurry are obviously reduced.The increase of mechanical stirring intensity can improve the fluidity of filling slurry.When the stirring speed is 1120 r/min and the stirring time is 150 s,the stirring efficiency of the stirring impeller to the filling slurry is the highest,and the fluidity of the slurry is better.The increase of stirring time and stirring speed can increase the number of collisions of material particles in the slurry,thus strengthening the reaction effect between tailing salt and calcium oxide,and improving the strength of tailing salt filling body within a certain range.
Tailing salt filling slurryFlow characteristicsFilling body strengthStirring timeStirring speed