Abstract: Lithium slag is a solid waste produced in the extraction process of lithium-containing compounds,and its re source utilization is of great significance to the treatment of solid waste.In order to reveal the influence of lithium slag on the rheological properties of slurry,the effects of lithium slag substitution rate,mass concentration and cement-sand ratio on the rheological properties of filling slurry were analyzed.The influence weight of multiple factors on the rheological properties of slurry was quantitatively evaluated by variance analysis combined with effect calculation method,and the quantitative weighted graph was used to visualize the analysis results.The influence of factor changes on slurry rheology was analyzed by disturbance diagram,and the yield stress of slurry under the influence of different factors was predicted by quadratic polynomial stepwise regression method.The results show that with the increase of lithium slag content,the flow performance of slurry shows a non linear evolution trend of decreasing first and then increasing.When the content of lithium slag is 10%,the yield stress of slurry reaches the minimum value of 28 Pa.The mass concentration has the greatest influence on the rheology of the slurry.The slurry with higher mass concentration significantly weakens the fluidity of the slurry.As the mass concentration of the slurry increa ses,the yield stress of the slurry shows an upward trend,up to 67 Pa.The cement-sand ratio is reduced from 1∶4 to 1∶8,and the workability of the slurry is enhanced.The degree of influence of various factors on the rheological properties of the slurry from large to small is mass concentration,lithium slag content,and cement-sand ratio.This study provides a scientific basis for predicting the rheological properties of filling slurry and provides theoretical guidance for the resource utilization of lithium slag.

Key words: fillingslurry,rheologicalproperty,lithiumslag,effectivedose