摘要
锂渣是含锂化合物提取过程中产生的固体废弃物,其资源化利用对固废治理具有重要意义。为了揭示锂渣对料浆流变性能的影响,分析了锂渣替代率、质量浓度和灰砂比因素对充填料浆流变性能的影响。通过方差分析结合效应量计算方法,量化评估多因素对料浆流变性能的影响权重,并采用量化加权图将分析结果可视化表征。通过扰动图分析因素变化对料浆流变性的影响,采用二次多项式逐步回归法对不同因素影响下的料浆屈服应力进行预测。结果表明:随锂渣掺量上升,料浆流动性能呈先下降后上升的非线性演化趋势。锂渣掺量为10%时,料浆屈服应力达到最小值28 Pa。质量浓度对料浆流变性影响最大,较高质量浓度料浆流动性显著减弱,随料浆质量浓度上升,料浆屈服应力呈现上升趋势,最大可达67 Pa。灰砂比由1∶4降至1∶8,料浆和易性得到一定增强。各因素对料浆流变性影响程度由大到小依次为质量浓度、锂渣掺量、灰砂比。本研究为预测充填料浆的流变性能提供科学依据,对锂渣资源化利用提供理论指导。
Lithium slag is a solid waste produced in the extraction process of lithium-containing compounds,and its resource 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 nonlinear 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 increases,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.
作者
甘德清
孙凌志
薛振林
刘志义
张坤
GAN Deqing;SUN Lingzhi;XUE Zhenlin;LIU Zhiyi;ZHANG Kun(School of Mining Engineering,North China University of Science and Technology,Tangshan 063200,China;Mine Green Intelligent Mining Technology Innovation Center of Hebei Province,Tangshan 063200,China)
出处
《金属矿山》
北大核心
2025年第12期1-7,共7页
Metal Mine
基金
河北省中央引导地方科技专项(编号:236Z4105G)
国家自然科学基金项目(编号:52204134)
河北省自然科学基金项目(编号:E2024209141)。
关键词
充填料浆
流变性
锂渣
效应量
filling slurry
rheological property
lithium slag
effective dose
