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Floc-Flotation of Malachite Fines with an Octyl Hydroxamate and Kerosene Mixture

School of Zijin Mining, Fuzhou University, Fuzhou 350108, China
CONACYT Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58030, Mexico
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
Instituto de Metalurgia, Universidad Autónoma de San Luís Potosí, San Luis Potosí 78210, Mexico
Author to whom correspondence should be addressed.
Minerals 2019, 9(5), 301;
Received: 20 March 2019 / Revised: 26 April 2019 / Accepted: 13 May 2019 / Published: 16 May 2019
PDF [3208 KB, uploaded 16 May 2019]


Malachite fines are easily produced in the grinding process, leading to low malachite flotation recovery. Floc-flotation of malachite fines with an octyl hydroxamate and kerosene mixture was studied to improve the flotation recovery, using microflotation, microscopy image observations, contact angle measurements, and Extended Derjguin–Landau–Verwey–Overbeek (EDLVO) analysis. The results showed that the addition of octyl hydroxamate as an emulsifier of kerosene enhanced the aggregation of malachite fines and improved malachite flotation recovery. In addition, when kerosene droplets were smaller and of uniform size distribution, the spreading of kerosene droplets on the malachite surface improved. The enhanced spreading of kerosene droplets led to higher coverage of kerosene on the malachite surface, resulting in improved hydrophobic aggregation and flotation recovery. View Full-Text
Keywords: Floc-flotation; emulsifier; malachite flotation; octyl hydroxamate; spreading Floc-flotation; emulsifier; malachite flotation; octyl hydroxamate; spreading

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Li, Z.; Rao, F.; Lou, X.; Song, S.; López-Valdivieso, A. Floc-Flotation of Malachite Fines with an Octyl Hydroxamate and Kerosene Mixture. Minerals 2019, 9, 301.

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