首页|Effect of sodium silicate on the flotation separation of chalcopyrite and galena using sodium sulfite and sulfonated lignin as depressant & nbsp;
Effect of sodium silicate on the flotation separation of chalcopyrite and galena using sodium sulfite and sulfonated lignin as depressant & nbsp;
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
A combination depressant SHI was composed of sodium sulfite (Na2SO3) and sulfonated lignin (SL) in a 5:1 M ratio. In this study, SHI and sodium silicate (Na2SiO3) were employed to inhibit the floatability of galena, and the synergies between agents was explored. Micro-flotation results shown that after 2.4 x 10(-4) mol/L SHI was added, the recovery of galena and fine-galena declined by 53% and 36%, respectively. SHI exhibited excellent depressing efficiency toward galena. In the presence of Na2SiO3, the inhibitory effect of SHI was more obvious. Zeta potential measurements indicates that SHI and Na2SiO3 altered the potential of galena surface through chemical reaction or adsorption action. The X-ray photoelectron spectroscopy results demonstrate that Na2SiO3 in the SHI were reacted with Pb ions on the galena surface and formed PbSO3, the SL was adsorbed by the galena surface through hydrogen bonding. In parallel, Na2SiO3 interacted with the mineral surface by generating PbSiO3. The addition of inhibitors increased the oxidation rate of the galena surface, thereby reducing the adsorption of collectors. Density functional theory simulations shown that Na2SiO3 reduced the bonding energy between the galena surfaces and Na2SiO3, and improved the stability of adsorption.& nbsp;
NSTL
Elsevier
