哈尔滨工程大学学报2024，Vol.45Issue(3)：535-542,8.DOI:10.11990/jheu.202110060
含粗骨料尾砂膏体长距离管输流变特性及阻力预测
Rheological properties and pipe resistance prediction of tailing paste containing coarse aggregate in long-distance transportation
摘要
Abstract
To investigate the effects of mass fraction,coarse aggregate content,cement-sand mass ratio,and hydra-tion time on the rheological properties of paste in long-distance pipeline transportation,a rheological experiment was carried out based on orthogonal design.Furthermore,the prediction models of rheological parameters were estab-lished by regression analysis.Subsequently,the pipeline resistance prediction model was constructed through theo-retical derivation,and the reliability of the prediction result was verified by field measurement data.The results indicate that the tailings paste containing coarse aggregate is a kind of Bingham fluid and that the mass fraction and the coarse aggregate content are the two most significant factors affecting the rheological parameters of the paste.Furthermore,yield stress increases exponentially with the increase in mass fraction,decreases exponentially with the increase in coarse aggregate content,and increases linearly with the increase in hydration time.Yield stress also has a minimal relationship with the cement-sand mass ratio.In addition,the plastic viscosity increases expo-nentially with the increase in mass fraction,decreases linearly with the increase in coarse aggregate content,and increases linearly with the increase in cement-sand mass ratio and hydration time.The average error of the estab-lished rheological parameters prediction model is within 4.3%,and the predicted value of the pipeline resistance model based on the Bingham rheological model is 12.5%larger than the field measurements,thus meeting the pre-cision requirements of engineering application.关键词
尾砂膏体/粗骨料/长距离输送/流变特性/演化规律/管道阻力/流变参数预测/阻力预测Key words
tailings paste/coarse aggregate/long-distance transport/rheological property/evolution law/pipe resistance/rheological parameters prediction/resistance prediction分类
矿业与冶金引用本文复制引用
王小林,严庆文,王洪江,尹升华,茶强华,熊有为..含粗骨料尾砂膏体长距离管输流变特性及阻力预测[J].哈尔滨工程大学学报,2024,45(3):535-542,8.基金项目
国家自然科学基金项目(51834001). （51834001）
