Synergistic Effects of Slurry Concentration and Binder Reactivity on the Hydraulic Transport of Unclassified Tailings Backfill
Ning Yang, Renze Ou, Zirui Li, Daoyuan Sun, Hongwei Wang, Qi Liu, Mingdong Tang, Xiaohui Li
TL;DR
This study examines how slurry concentration and binder choice affect the transport of mining tailings for backfilling in deep mines.
Contribution
The study identifies optimal slurry concentration and binder for efficient and cost-effective tailings backfill transport.
Findings
A slurry concentration of 68% to 72% provides optimal fluidity and low pipeline resistance.
Kunlun Mountain PO42.5 cement was found to be the most cost-effective and mechanically suitable binder.
Increasing pipe diameter reduces transport difficulty in tailings backfill systems.
Abstract
To address the safety and environmental challenges associated with deep mining, this study investigates the rheological behaviors and pipeline transport characteristics of cemented paste backfill (CPB) using unclassified tailings from a lead–zinc mine. Through the characterization of basic physicochemical properties—including chemical composition, particle size distribution, and specific surface area—combined with L-shaped pipeline simulation tests, the effects of slurry concentration and pipe diameter on rheological parameters and transport resistance were quantitatively analyzed. Furthermore, the mechanical performance and cost-effectiveness of four different cementitious binders were evaluated to identify the optimal material. The results indicate that the unclassified tailings possess a favorable particle size distribution with a significant fine-particle filling effect, making them…
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Taxonomy
TopicsTailings Management and Properties · Materials Engineering and Processing · Geotechnical Engineering and Soil Mechanics