Utilization of N-carboxymethyl chitosan as selective depressants for talc on the flotation of chalcopyrite

Flotation separation of chalcopyrite from talc is difficult because of the natural hydrophobicity of two minerals. In this work, the flotation separation of chalcopyrite from talc using N-carboxymethyl chitosan as a depressant for talc depression was studied. The micro-flotation results indicated that the flotation separation of chalcopyrite from talc cannot be realized effectively at pH 9 with low concentration of N-carboxymethyl chitosan, in the presence of calcium ions, talc was more efficiently selective depressed by N-carboxymethyl chitosan while the chalcopyrite recovery wasn't influenced. Contact angle, zeta potential and adsorption results showed that Ca2+ and CaOH+ absorbed on talc surface and increased the absorption amount of N-carboxymethyl chitosan on mineral surface, and increased hydrophilicity of talc surface, resulting the selective depression for talc on chalcopyrite flotation.

[1]  Q. Feng,et al.  Utilization of N-carboxymethyl chitosan as selective depressants for serpentine on the flotation of pyrite , 2017 .

[2]  Fen Jiao,et al.  Depression mechanism of the zinc sulfate and sodium carbonate combined inhibitor on talc , 2016 .

[3]  G. Gu,et al.  The effect of a new polysaccharide on the depression of talc and the flotation of a nickel–copper sulfide ore , 2015 .

[4]  M. Pawlik,et al.  Molecular weight effects in interactions of guar gum with talc , 2015 .

[5]  R. P. Tewari,et al.  Biomedical applications of carboxymethyl chitosans. , 2013, Carbohydrate polymers.

[6]  Bibhas K. Bhunia,et al.  Enzymatically crosslinked carboxymethyl–chitosan/gelatin/nano-hydroxyapatite injectable gels for in situ bone tissue engineering application , 2011 .

[7]  P. Harris,et al.  The influence of metal cations on the behaviour of carboxymethyl celluloses as talc depressants , 2008 .

[8]  M. Pawlik,et al.  The effect of lignosulfonates on the floatability of talc , 2007 .

[9]  Lichen Yin,et al.  Superporous hydrogels containing poly(acrylic acid-co-acrylamide)/O-carboxymethyl chitosan interpenetrating polymer networks. , 2007, Biomaterials.

[10]  J. Douillard,et al.  Surface energy of talc and chlorite: Comparison between electronegativity calculation and immersion results. , 2007, Journal of colloid and interface science.

[11]  Q. Feng,et al.  Adsorption of polysaccharide onto talc , 2006 .

[12]  Dee Bradshaw,et al.  The effect of chemical composition and molecular weight of polysaccharide depressants on the flotation of talc , 2000 .

[13]  M. Al-Wakeel,et al.  Talc separation from talc-carbonate ore to be suitable for different industrial applications , 2000 .

[14]  J. Ralston,et al.  The adsorption of a polysaccharide at the talc–aqueous solution interface , 1998 .

[15]  J. Laskowski,et al.  Adsorption of Dextrin and Guar Gum onto Talc. A Comparative Study , 1997 .

[16]  L. K. Bailey,et al.  Decomposition of pyrite in acids by pressure leaching and anodization: the case for an electrochemical mechanism , 1976 .