Selective Adsorption of 2-Hydroxy-3-Naphthalene Hydroxamic Acid on the Surface of Bastnaesite and Calcite

In this study, 2-hydroxy-3-naphthalene hydroxamic acid (NHA) was used as a collector in microflotation experiments. By comparing the flotation performance of NHA with that sodium oleate (NaOL) and salicylhydroxamic (SHA) commonly industry, separation bastnaesite calcite studied. Potentiodynamic (zeta) measurements, Fourier transform infrared spectroscopy (FTIR) measurements X-ray photoelectron (XPS) were to reveal interaction mechanism NHA. The results pure mineral test showed when pH value 9 dosage 4.0 × 10−4 mol/L, recovery reached 93.5%. A concentrate grade 87.08% obtained from artificially mixed ore, 90.83%. zeta FTIR experiments adsorbed onto surface bastnaesite, which changed state bastnaesite. XPS testing chemically Ce3+ formed chelated structure −C(OH)=NO−. hydrophobicity improved, made it easier for adhere slurry by bubbles. At present, most domestic methods recovering fine-grained use recovery. Calcite other gangue minerals inevitably enter into resulting low-grade REE concentrate.