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China Surfactant Detergent & Cosmetics ›› 2020, Vol. 50 ›› Issue (6): 379-386.doi: 10.3969/j.issn.1001-1803.2020.06.004

• Development and application • Previous Articles     Next Articles

Flotation properties and mechanism of rutile in binary surfactant systems containing sodium linoleate

LIU Ming-bao1,2,WANG Ting1,2,WANG Yu-yu1,2,LIU Hu-gang1,2,LI Zhi1,2   

  1. 1. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo, Shaanxi 726000, China
    2. College of Chemical Engineering and Modern Material, Shangluo University, Shangluo, Shaanxi 726000, China
  • Received:2019-10-14 Revised:2020-05-21 Online:2020-06-22 Published:2020-06-22

Abstract:

Flotation performances of rutile in binary systems of sodium linoleate (SL) / sodium oleate (SO) and sodium linoleate (SL) / benzohydroxamic acid sodium salt (BHA) were investigated through pure mineral flotation test. Measurements such as Zeta potential, surface tension, contact angle and UV diffuse reflectance spectroscopy were applied to discuss the interaction mechanism between reagents as well as the reagents onto mineral surface. The results indicated that the adding sequence of reagents had a significant influence on rutile flotation behavior and the synergistic effect index of SL/BHA system was better than that of SL/SO system. The adsorption modes of mixed surfactants on rutile surface could be divided into two major categories: ionic co-adsorption and association adsorption. The intermolecular interaction between the reagents and the adsorption properties of the association complexes were critical for the synergistic effect and the rutile flotation in different systems. The flotation behaviors of rutile at different reagent adding orders were consistent with the variations of bandgap width in SL/BHA system while no distinct corresponding relationship was found in SL/SO system.

Key words: mixed surfactants, surface tension, hydrophobic association, rutile flotation

CLC Number: 

  • TQ423