التفاصيل البيبلوغرافية
| العنوان: |
絮凝剂残留对超细全尾砂似膏体流变特性的影响规律研究. (Chinese) |
| Alternate Title: |
Study on the influence of flocculant residue on the rheological properties of ultrafine ungraded tailings paste-like slurry. (English) |
| المؤلفون: |
王文波, 李帅, 于正, 李振龙, 王洪涛 |
| المصدر: |
Gold (1001-1277); Jan2025, Vol. 46 Issue 1, p64-81, 6p |
| مصطلحات موضوعية: |
PIPELINE transportation, PARTICULATE matter, FIELD research, FLOCCULANTS, SLURRY |
| Abstract (English): |
Ultrafine tailings exhibit slow settling rates, low thickening efficiency, and high overflow water turbidity, necessitating the use of flocculants to accelerate fine particle sedimentation. However, flocculant residues remain in the thickened paste-like slurry, increasing its viscosity, reducing its concentration, promoting agglomeration, and raising pipeline transport resistance. This study employed theoretical analysis and field experiments to explore the mechanism by which flocculant residue influences the rheological properties of ultrafine ungraded tailings paste-like slurry. Results indicate that under flocculant restoration or shear damage, the floc network structure either encapsulates or releases water molecules, inducing migration and transformation between free and capillary water. This phenomenon is the fundamental cause of changes in the shear rheological properties of ultrafine ungraded tailings paste-like slurry. By optimizing flocculant selection, the study achieved a significant reduction in flocculant dosage and effectively mitigated its adverse effects. The findings hold substantial significance for systematically advancing the theory and methods of paste-like slurry shear rheology and pipeline transport. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
超细粒径尾砂沉降速度慢、浓缩效率低、溢流水浊度高, 必须添加絮凝剂加速细颗粒的沉 降, 因此絮凝剂会残留在浓缩后的似膏体中, 导致其黏性增加、浓度偏低、易结块和管道输送阻力增 大。综合运用理论分析和现场试验等研究手段, 对絮凝剂残留与超细全尾砂似膏体流变特性的影 响机理进行了深入研究, 结果表明: 絮凝剂修复或剪切破坏作用下, 絮网结构会包罗或释放水分子 引起自由水和毛细水之间的迁移和转化, 这是超细全尾砂似膏体剪切流变特性产生变化的根本原 因。通过优化絮凝剂选型, 不仅大大降低了絮凝剂的用量, 也显著改善了絮凝剂的不利影响。研究 成果对于系统地发展似膏体剪切流变和管道输送理论与方法具有重要意义。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |