Influence of a plant-based surfactant on improving the stability of iron ore particles for dispersion and pipeline transportation

• Published in: Powder technology 2022-07, Vol.407, p.117620, Article 117620
• Main Authors: Behari, Mandakini, Mohanty, A.M., Das, Debadutta
• Format: Article
• Language: English
• Subjects: Aqueous and chemical extraction process; Dispersion; Head loss; Hematite (Fe2O3); Rheology; Slurry transportation
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2022.117620

This investigation addresses the study of the effects of the saponin isolated from the fruits of Sapindus laurifolia (S. laurifolia) as a dispersing and stabilizing agent in the pipeline transportation of iron ore (IO) particles. Two types of IO samples named S1 and S2, which are primarily constituted of hematite (Fe2O3) are taken for the study. The rheological behavior of iron ore water slurry (IOWS) has been studied as a function of saponin dosages, IO concentration, pH, temperature, and the shear rate-shear stress relationship. The isoelectric point of IOWS is calculated by the variation of zeta potential with pH. A suitable mechanism model is given to describe the interaction between S. laurifolia and IO particles. The economic effect of the dispersant has been examined based on slurry head loss, solids conveying rate, hydraulic power need, and specific power consumption (SPC) for the proposed IOWS pipeline to be introduced into commercial operation. [Display omitted] •Rheological study of high concentration iron ore water slurry using surfactant S.laurifolia.•Contact angle measurement predicts improved hydrophobicity of iron ore particle.•Zeta potential study predicts electrostatic stabilization.•Lowest viscosity and maximum stability is achieved just above the CMC of S.laurifolia.