Sphalerite is a common sulfide mineral, and xanthate is usually used as the collector of sphalerite flotation. In order to realize the simultaneous flotation of sphalerite- and zinc-containing oxide ores, in this paper, dodecylamine was used as the collector and sodium sulfide as the regulator to explore the flotation behavior of …
The micro-flotation findings revealed that BN returned the stronger collecting power and higher selectivity than isobutyl xanthate during flotation separation of galena from sphalerite, and achieved their effective separation at low alkaline conditions (pH ∼ …
Semantic Scholar extracted view of "Effect of seawater on flotation separation of galena from sphalerite" by N. Song et al.
Ore mineral characteristics as rate-limiting factors in sphalerite flotation: Comparison of the mineral chemistry (iron and manganese content), grain size, and liberation ... The samples mainly consisted of sphalerite, pyrite, and galena, which were hosted in skarn-altered manganoan dolomitic marble.
To address the issue of mediocre separation efficiency of depressants in the copper-lead separation process, this article synthesized a macromolecular organic depressant, polymaleic anhydride-ethylenediaminetetraacetic acid (PMA–EDTC), using a polycarboxylic macromolecule as the backbone and also introducing –N–(C=S)–S– as …
Galena (PbS) is an important and abundant source of lead (Pb) metal. It often coexists with other sulphide minerals such as sphalerite (ZnS). Flotation has been extensively used to separate galena ...
To enhance the selective separation of galena and sphalerite from their mixture minerals, 2-hydroxyethyl dibutyldithiocarbamate (HEBTC) surfactant was synthesized and its first applications on the flotation of galena and …
The results of galena flotation test in the CDR system are shown in Fig. 4. Fig. 4 Influence of pulp potential on flotability of galena This shows that in the depressing process, the flotation behavior of galena is similar to that of pyrite or sphalerite. However, in the reactivating process, the flotation behavior of galena is obviously ...
In this work, HPAA (2-Hydroxyphosphonoacetic Acid) was explored as a novel sphalerite depressant for the selective flotation of sphalerite and galena. The depression performances and mechanisms were investigated through micro-flotation tests and various characterization techniques.
In the current study, the effect of pulp pH and the collector type parameters on the galena and sphalerite flotation from a complex lead–zinc–iron ore was …
Flotation has been extensively used to separate galena and sphalerite. Herein, a reagent scheme comprising aerofloat collectors and Zn 2+ and SO 32− …
The flotation results showed that collector with more nitrogen atoms (DPTZ) offered better selectivity for the flotation separation of galena from a galena/sphalerite mixed mineral system. Separation selectivity, FTIR and XPS studies showed, in the case that collector solution environment pH value < pK a value, N atoms did not participate in ...
The flotation of galena and sphalerite fines in the form of flocs, which is termed floc flotation, has been studied in the present work. The flocs for…
In this work, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) was explored as a novel sphalerite depressant in the selective flotation of galena from sphalerite. The separation performances were investigated by …
Hydrophobic group is a crucial yet underutilized component of a collector molecule. Herein we examine the flotation behaviors of thioureas with various hydrophobic groups for a galena/sphalerite mixed flotation system and compare them with sodium ethyl-xanthate (SEXT).
The change of surface components of sulfide minerals during grinding is an important factor affecting the selective flotation separation of galena and sphalerite.
In this work, an environment-friendly sphalerite depressant 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) was exploited in the flotation separation of sphalerite and galena. The flotation performances of sphalerite and galena treated by HEDP were investigated by mineral flotation tests.
In this study, selective adsorption mechanism of zinc ions on the surfaces of galena and sphalerite in the flotation separation of Pb-Zn was comprehensively explored by flotation tests, Zeta potential measurements, Fourier transform interferometric radiometer (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) analysis, and density functional …
Lecture 5 Flotation 1 CHAPTER 7– FLOTATION OF SULPHIDE MINERALS Contents: Xanthate adsorption. Oxidation reactions. Activation & depression. Flotation of chalcopyrite, galena, sphalerite, pyrite.
The oxidation of, and interaction of xanthate and other reagents with, galena surfaces is discussed. The results of recent scanned microscopy investig…
Infrared attenuated total reflection spectrophotometry, UV data, microelectrophoresis and a Hallimond tube flotation cell have been used to investigate the effect of Pb(II) on the galena and sphalerite surface properties (hydrophobicity and charge of the surface), ethyl xanthate adsorption and ethyl xanthate adsorption kinetics in …
The flotation response of sphalerite is changed appreciably when activating agents are added to the system. An addition of 1x10 -5 mole per liter lead chloride is sufficient to …
The selective flotation of sphalerite from a sphalerite-galena mineral mixture has been achieved using cells and extracellular secretions of Bacillus megaterium after adaptation to the chosen minerals. The extracellular secretions obtained after thermolysis of bacterial cells adapted to sphalerite yield the highest flotation recovery …
Flotation responses of galena, sphalerite, and pyrite at pH 9, 10 °C, and 30 °C: ( a) kinetic yield curves; ( b) distributions of flotation rate constants. Change in the …
The flotation results demonstrate that Zn 2+ and SO 3 2− provide a synergistic depression effect on sphalerite and the aerofloat collectors exhibit more selectivity towards galena.
Seawater can inhibit the flotation of both sphalerite and galena, but the sphalerite recovery increases slightly when the two are separated by flotation. This is because seawater can promote the bubble property, which aggravates the entrainment of sphalerite in galena.
Dependence of flotation (solid line), ~ potential (dotted line) and sedimentation (dashed line) of sphalerite on pH in the presence of KHX (triangle), ATP (+) and without collector (diamond). parameters for the flotation of galena, chalcocite and sphalerite with the aromatic chelate collectors MBT, MBO and ATP.
Semantic Scholar extracted view of "Lead activation of sphalerite during galena flotation" by C. Basilio et al.
This study shows that dithionite suppresses galena oxidation and Pb contamination of sphalerite and suggests that improved selective flotation of galena against sphalerite may be achieved using dithionite. However, formation of lead sulphite on galena, which hinders xanthate adsorption on galena, needs to be controlled.
From the results of single mineral flotation tests, MDPE was a potentially selective collector to separate galena and sphalerite under slightly alkaline conditions (pH=8.5). Considering the complex composition of mineral slurry, the artificially mixed minerals of galena and sphalerite flotation experiments were further performed.