Effective Extraction of Titanium and Iron from Coarse Anatase Concentrate

Xiao, Junhui; Zou, Kai; Gao, Deqiang; Zhong, Nanlan; Xiong, Wenliang; Li, Chengxiu; Huang, Wenxiao; Liang, Guanfeng

doi:10.1007/s11837-022-05421-x

Cited by 4 publications

(1 citation statement)

References 35 publications

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“…It can effectively separate valuable minerals and gangue minerals by using the difference in mineral surface hydrophobicity [9][10][11]. The flotation collector can be selectively adsorbed on the valuable mineral to increase its surface hydrophobicity, so that the surface hydrophobicity of the valuable mineral and gangue mineral is different [12,13]. Fatty acids and hydroxamic acids are the main collectors used in foam flotation of rare earth minerals [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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

Xiong

Wang²,

Xiao³

et al. 2022

Minerals

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

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