Copper Tailing Flocculation in Seawater: Relating the Yield Stress with Fractal Aggregates at Varied Mixing Conditions
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AuthorJeldres, Matias; Piceros, Eder C.; Toro Villarroel, Norman Rodrigo; Torres, David; Robles, Pedro; [et al.]
Knowledge AreaCiencia de los Materiales e Ingeniería Metalúrgica
SponsorsRicardo I. Jeldres thanks Conicyt Fondecyt 11171036 and Centro CRHIAM Project Conicyt/Fondap/15130015. The authors are grateful for the contribution of the Scientific Equipment UnitMAINI of the Universidad Católica del Norte for supporting the experimental tests. Pedro Robles thanks the Pontificia Universidad Católica de Valparaíso for the support provided.
Realizado en/conUniversidad de Antofagasta; Universidad Arturo Pratt; Pontificia Universidad Católica de Valparaíso; Universidad Católica del Norte
Bibliographic CitationJeldres M, Piceros EC, Toro N, Torres D, Robles P, Leiva WH, Jeldres RI. Copper Tailing Flocculation in Seawater: Relating the Yield Stress with Fractal Aggregates at Varied Mixing Conditions. Metals. 2019; 9(12):1295. https://doi.org/10.3390/met9121295
The implications of physical conditions of the feedwell on the rheological properties of synthetic copper tailings, flocculated in seawater, were analysed. The mixing intensity of flocculation was related to the structural characteristics of the aggregates, and the outcomes were linked to the yield stress of the pulp sediments. Tailings settling assays were conducted by using a 30 mm turbine type stirrer with an in-situ aggregate size characterisation. The structural characteristics of the aggregates were determined by using the focused beam reflectance measurement (FBRM). After a mixing time between the pulp and the flocculant, the sample was allowed to settle for 2.5 h, where the variation of the sediment height was minimal. The sediment was gently removed and subjected to rheological characterisation. The yield stress was measured on an Anton Paar MCR 102 rheometer (ANAMIN Group, Santiago, Chile), with a vane-in-cup configuration. The mixing intensity was related to the characteristics ...
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