Chemical and colloidal aspects of collectorless flotation behavior of sulfide and non-sulfide minerals

2015 ◽  
Vol 225 ◽  
pp. 203-217 ◽  
Author(s):  
Sajjad Aghazadeh ◽  
Seyed Kamal Mousavinezhad ◽  
Mahdi Gharabaghi
Keyword(s):  
Sulfide Minerals ◽  
Flotation Behavior

Effects of Galvanic Interaction on Collectorless Flotation Behavior of Galena and Pyrite

2011 ◽  
Vol 402 ◽  
pp. 514-517 ◽  
Author(s):  
Duan Kang ◽  
Jian Hua Chen
Keyword(s):  
Sulfide Minerals ◽  
Galvanic Couple ◽  
Rest Potential ◽  
Galvanic Interaction ◽  
Flotation Behavior

Galvanic interactions between sulfide minerals have significant effects on their electrochemistry and flotation behavior. The effects of galena and pyrite on their collectorless flotation behavior have been studied in this paper. The results showed that galvanic interaction between galena and pyrite would occur when they were mixed. In the galvanic-couple , pyrite forms a cathode due to the higher rest potential, and is reduced, which results in its floatability decreased; while galena forms a anode due to the lower rest potential, and is oxidized, which results in its floatability increased.

scholarly journals Influence of Terpenic Oil on Flotation Behavior of Sphalerite and Implication for the Selective Separation

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Bo Yang ◽  
Xian Xie ◽  
Xiong Tong ◽  
Lingyun Huang
Keyword(s):  
Contact Angle ◽  
Zeta Potential ◽  
Surface Hydrophobicity ◽  
Sulfide Minerals ◽  
Selective Separation ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Froth Stability ◽  
Ft Ir ◽  
Flotation Behavior

Terpenic oil (TO) is commonly used as a flotation frother for the selective separation of sulfide minerals. As a frother, most reports have mainly focused on its effect on froth stability and froth entrainment, whereas its influence on the floatability of sulfide minerals has received little attention. In this work, the influence of TO on the flotation behavior of sphalerite was investigated by using microflotation tests, contact angle and zeta potential measurements, and FT-IR and SEM-EDS analyses. Microflotation tests conducted in a modified Hallimond tube indicated that compared with the collector potassium butyl xanthate (KBX), the flotation recovery of sphalerite was significantly increased when TO was added to the pulp, but the recovery of Cu-activated sphalerite with the addition of TO was lower than that with the addition of KBX. Contact angle measurements demonstrated that the contact angle of sphalerite was distinctly increased by the addition of TO, but the contact angle of sphalerite treated with TO was lower than that treated with KBX after Cu activation. Zeta potential measurements demonstrated that the zeta potential of sphalerite particles was slightly decreased when treated with TO, and the isoelectric point (IEP) was decreased from 3.3 to 3.1 due to the interaction of TO with sphalerite particles. FT-IR and SEM-EDS confirmed that TO could be adsorbed on the sphalerite surface on the formation of the oil film due to its low solubility, thereby increasing the surface hydrophobicity of the sphalerite. In addition, the TO absorbed on the surface acts as a bridging role and promotes the hydrophobic agglomeration of sphalerite particles. These results suggest that except for froth entrainment, the influence of TO on the flotation behavior of sphalerite may be another reason for the misreporting of sphalerite in concentrates.

Effect of surfactants and their mixtures on wettability of sulfide minerals by molten sulfur

2019 ◽  
Author(s):  
El'vira Kolmachikhina ◽  
◽  
Ekaterina Ryzhkova ◽  
Dar'ya Dmitrieva ◽  
◽  
...  
Keyword(s):  
Sulfide Minerals ◽  
Molten Sulfur

Abiotic reduction of 2,4-dinitrotoluene in the presence of sulfide minerals under anoxic conditions

1996 ◽  
Vol 34 (10) ◽  
pp. 25-33 ◽  
Author(s):  
Cheng Jiayang ◽  
Makram T. Suidan ◽  
Albert D. Venosa
Keyword(s):  
Electron Donor ◽  
Chemical Reduction ◽  
Sulfide Minerals ◽  
Sulfide Concentration ◽  
Magnesium Ions ◽  
High Concentration ◽  
Anoxic Conditions ◽  
High Affinity ◽  
Iron Nickel ◽  
Abiotic Reduction

Abiotic reduction of 2,4-dinitrotoluene (DNT) in the presence of sulfide minerals has been investigated under anoxic conditions at 35°C. 2,4-DNT was abiotically reduced to 4-amino-2-nitrotoluene (4-A-2-NT) and 2-amino-4-nitrotoluene (2-A-4-NT) in the presence of high concentration of sulfide (0.84 mM). No abiotic reduction of 2,4-DNT was observed in the presence of low sulfide concentration (0.42 mM). The rate and the extent of the abiotic reduction of 2,4-DNT were increased with an increase in sulfide concentration. Sulfide served as an electron donor for the reduction of 2,4-DNT. The 2-nitro group was preferentially reduced, making the 2-A-4-NT:4-A-2-NT ratio in the final products 2:1. The addition of iron, nickel, and cobalt minerals significantly enhanced the abiotic reduction. The FeS, NiS, and CoS solids formed in the serum bottles catalyzed the reduction of 2,4-DNT preferentially to 4-A-2-NT. MnS and CuS solids also catalyzed the reduction of 2,4-DNT to 4-A-2-NT, but did not change the overall reduction of 2,4-DNT. However, the presence of calcium, zinc, and magnesium minerals impeded 2,4-DNT reduction. The calcium, zinc, and magnesium ions have a high affinity to sulfide, inactivating sulfide as an electron donor for the chemical reduction of 2,4-DNT.

Effects of coarse chalcopyrite on flotation behavior of fine chalcopyrite

2021 ◽  
Vol 163 ◽  
pp. 106776
Author(s):  
Muhammad Bilal ◽  
Mayumi Ito ◽  
Kanami Koike ◽  
Vothy Hornn ◽  
Fawad Ul Hassan ◽  
...  
Keyword(s):  
Flotation Behavior

The Effect of Complexing Reagents on Flotation of Sulfide Minerals and Cassiterite from Tin-Sulfide Tailings

2020 ◽  
pp. 1-14
Author(s):  
T.N. Matveeva ◽  
V.A. Chanturiya ◽  
V.V. Getman ◽  
N.K. Gromova ◽  
M.V. Ryazantseva ◽  
...  
Keyword(s):  
Sulfide Minerals ◽  
Tin Sulfide ◽  
Sulfide Tailings

New potential pyrrhotite and pentlandite reference materials for sulfur and iron isotope microanalysis

2021 ◽  
Author(s):  
Lei Chen ◽  
Yu Liu ◽  
Yang Li ◽  
Qiuli Li ◽  
Xian-Hua Li
Keyword(s):  
Reference Materials ◽  
Sulfide Minerals ◽  
Ore Deposits ◽  
Iron Isotope ◽  
S Isotopes ◽  
Fe Isotopes

Pyrrhotite and pentlandite are the most common Fe sulfide minerals in magmatic ore deposits and meteorites. Multiple S isotopes pairing with Fe isotopes of bulk Fe sulfides have proven to...

Sign in / Sign up

Export Citation Format

Share Document