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Article
Engineering, Chemical
Qicheng Feng et al.
Summary: This study investigated the interaction between lead ions (Pb2+) and smithsonite surfaces, and its effect on the sulfidization characteristics and xanthate adsorption. The addition of Pb2+ greatly increased the smithsonite flotation recovery, as it promoted sulfidization and improved xanthate adsorption. This enhanced the hydrophobicity of the smithsonite surfaces, leading to increased flotation recovery.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Mining & Mineral Processing
Xi Zhang et al.
Summary: In this study, the impact of ammonium sulfate on the adsorption characteristics of low-concentration Pb(II) ions on the sulfidized hemimorphite surface was comprehensively investigated. The results showed that ammonium sulfate significantly improved the maximum recovery of hemimorphite from 69.42% to 88.24% under low concentration of Pb(II) ions. The enhanced adsorption of Pb(II) ions on the hemimorphite surface treated with ammonium sulfate was attributed to the transformation of the main adsorbed species from Pb?O/OH to PbS, facilitated by the presence of more zinc sulfide (ZnS) providing effective adsorption sites.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Wanming Lu et al.
Summary: In this paper, copper ions and ammonium salts were used to modify the malachite surface, improving its reactivity and hydrophobicity. The flotation recovery of malachite was greatly enhanced by this synergistic activation system compared to direct sulfidization. The synergistic activation increased the content of active cuprous sulfide species on the malachite surface, and more xanthate components were stably adsorbed, increasing the hydrophobicity, thus promoting the hydrophobic flotation of malachite.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Meili Wang et al.
Summary: The presence of lead ions affects the surface properties and flotation behavior of zinc oxide minerals. The addition of lead ions enhances the floatability and flotation recovery of sulfidized smithsonite. This is attributed to the interaction between lead ions and the sulfidized smithsonite surfaces, which promotes xanthate adsorption and improves surface hydrophobicity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Zhihao Shen et al.
Summary: The study investigated the effect of dissolved components derived from malachite and calcite on the flotation behavior and surface characteristics of both minerals. It was found that the presence of calcite supernatant decreased the recovery of malachite, while the malachite supernatant increased the recovery of calcite. Various tests demonstrated that the Ca species in the calcite supernatant hindered the interaction of Na2S with malachite, resulting in insufficient adsorption of NaIX on the surface of malachite. On the other hand, the Cu species in the malachite supernatant provided active sites for the adsorption of Na2S and NaIX onto the calcite surface.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Mining & Mineral Processing
Wenjuan Zhao et al.
International Journal of Mining Science and Technology
(2023)
Article
Engineering, Environmental
Xiufeng Gong et al.
Summary: In this study, we used diammonium hydrogen phosphate (DHP) to regulate the flotation separation of brucite and calcite. DHP was found to have activation and inhibition effects on calcite and brucite flotation, respectively, resulting in a significant recovery difference between the two minerals. Further analysis showed that DHP affects the contact angle and zeta potential of calcite and brucite surfaces, leading to differences in their floatability. In addition, infrared and X-ray photoelectron spectroscopy tests revealed the adsorption behavior of DHP on the mineral surfaces, confirming its stronger affinity for calcite than brucite.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Song Zhang et al.
Summary: Surface modification of smithsonite with Pb ions using NH3•H2O enhanced Pb ion adsorption, leading to improved flotation performance. The main Pb species adsorbed were Pb(OH)2 and Pb3(CO3)2(OH)2 precipitates, increasing by 35.29% on the smithsonite surface. This method increased the recovery of NH3•H2O-pretreated smithsonite by approximately 10% in a Pb ion-modified sulfidization-xanthate flotation system.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Han Wang et al.
Summary: This study investigated the interaction mechanism of copper ions with the surface of sulfidized malachite and its effect on flotation. The results showed that an appropriate concentration of copper ions enhanced the hydrophobicity and recovery of sulfidized malachite, while high concentration treatment decreased them. Copper ion modification reduced collector consumption and improved the reaction activity and sulfidization product activity of the mineral surface. However, high copper-ion concentration led to the formation of copper hydroxide complexes and decreased the mineral surface reaction activity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Runpeng Liao et al.
Summary: This study investigated the effects of sodium hexametaphosphate (SHMP) on the flotation of fine smithsonite and calcite in the Na2S-Pb(II)-KIAX system. The results showed that SHMP acted as a depressant on calcite and a dispersant on both minerals, aiding in their separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Li Wang et al.
Summary: In this study, the authors introduced a depressant sodium hexametaphosphate (SHMP) for the flotation separation of smithsonite from dolomite. The results showed that the addition of SHMP significantly improved the separation between smithsonite and dolomite by decreasing the recovery of dolomite and slightly increasing the recovery of smithsonite. The depression mechanism of SHMP was revealed through FTIR and XPS analysis.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Yahui Yi et al.
Summary: Lead ions (Pb2+) were effective for increasing the content of active sites on the surface of hemimorphite, improving its flotation behavior. The stepwise activation with Pb2+ enhanced the xanthate adsorption on hemimorphite surfaces, leading to increased flotation recovery.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Mining & Mineral Processing
Jinpeng Cai et al.
Summary: The growth of copper sulfide crystal onto azurite surfaces during sulfurization was investigated, which greatly promoted the azurite flotation. However, excess sodium sulfide led to the generation of massive colloidal copper sulfide in flotation pulp, deteriorating the flotation environment and decreasing the effective adsorption of collector onto azurite surfaces.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Qian Zhang et al.
Summary: This study investigated the surface modification of azurite with lead ions and its impact on the adsorption of sulfide ions and xanthate species. The results showed that lead ions can promote sulfidization, enhance surface hydrophobicity, and improve flotation recovery.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Chemical
Qian Zhang et al.
Summary: The addition of lead ions after sulfidization of azurite with Na2S improved the flotation recovery of copper oxide ores containing azurite. Zeta potential determination indicated that chemisorption occurred when the sulfidized azurite surface was modified with lead ions. The ToF-SIMS analysis showed the presence of S-, S-2(-), SO3-, and Pb2+ ions on the azurite surface.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Jin Yao et al.
Summary: This study investigated the mechanisms of STPP in separating magnesite from dolomite in NaOl systems and found that STPP significantly depressed dolomite, leading to improved separation efficiency. Surface analyses revealed that the preferential adsorption of STPP on dolomite was the key factor in this differential adsorption and depression process.
Article
Engineering, Chemical
Qiuyue Sheng et al.
Summary: Using NH4HSO4 as an activator was found to enhance the sulfidization flotation of azurite, increase the adsorption of Na2S and NaBX, and improve the floatability of azurite by reducing CO32- and OH- content on the surface. X-ray photoelectron spectroscopy analysis confirmed the increase in copper sulfide content and improved sulfidation of azurite with NH4HSO4. Density functional theory calculations showed that the interaction between Na2S and azurite surface was strengthened by NH4HSO4.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Dingquan Xing et al.
Summary: This study proposes a method to increase the number of sulfide active sites on the hemimorphite surface through surface modification with fluorine ions, showing better floatability and increased recovery in sulfidization flotation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Bin Luo et al.
APPLIED SURFACE SCIENCE
(2020)
Article
Geochemistry & Geophysics
Ruizeng Liu et al.
Article
Chemistry, Physical
Kai Jia et al.
APPLIED SURFACE SCIENCE
(2018)
Article
Chemistry, Physical
Ye Chen et al.
APPLIED SURFACE SCIENCE
(2018)
Article
Engineering, Chemical
Kai Jia et al.
MINERALS ENGINEERING
(2017)
Article
Engineering, Chemical
J. Yao et al.
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2016)
Review
Chemistry, Physical
Majid Ejtemaei et al.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2014)
Article
Engineering, Chemical
Majid Ejtemaei et al.
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2012)
Article
Engineering, Chemical
M. Irannajad et al.
MINERALS ENGINEERING
(2009)
Article
Engineering, Chemical
A. H. Navidi Kashani et al.
MINERALS ENGINEERING
(2008)
