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Case StudySector: Mining

High-Density Mine Tailing Dewatering & Paste Backfill Pipeline Hydraulics

Optimizing non-Newtonian slurry rheology, underflow thickener density, and pipeline friction losses in high-pressure paste pumping lines across underground mines.

Senior Process Engineer
Mining Operations Specialist
August 1, 2026
8 min read
High-Density Mine Tailing Dewatering & Paste Backfill Pipeline Hydraulics

Mine tailings dewatering and underground paste backfill present complex hydraulic challenges due to the non-Newtonian, yield-stress behavior of concentrated mineral slurries.

1. Rheology & Pipeline Friction Modeling MacProtec process engineers develop rheological models based on Bingham plastic and Herschel-Bulkley flow formulations: - Calculating yield stress thresholds required to initiate and maintain laminar paste flow. - Determining head loss gradients per 100 meters across varying pipe diameters and solids concentrations (72% to 82% solids by weight). - Simulating transient hydraulic surges and water hammer conditions during emergency pump trips.

2. Process Optimization Results - Increased thickener underflow density from 64% to 78% solids by weight. - Recovered over 90% of process water for re-use in mineral grinding circuits. - Guaranteed line blockage prevention and optimized positive-displacement pump sizing.

Senior Process Engineer
Mining Operations Specialist
MACPROTEC Engineering Consulting • Houston, TX
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