1. Introduction. Galena and sphalerite are the main ore sources for industrial extraction of lead and zinc [1], [2], [3].However, galena and sphalerite are difficult to separate as they coexist with each other [4], [5], [6].With the development of high-grade mineral resources, sulfide minerals tend to be more and more "lean, fine and hybrid" [7], …
Introduction. Galena and sphalerite usually coexist closely in polymetallic sulphide ores. The flotation separation of Pb-Zn sulfides has been largely achieved by depressing sphalerite using inorganic depressants, such as ZnSO 4, Na 2 SO 3 and cyanides (Bulatovic and Wyslouzil, 1995). However, these reagents always suffer from a …
The primary coexisting mineral with galena is sphalerite. Hence, it is critical to selectively separate galena from sphalerite by flotation. In this work, thiourea and related derivatives as … Expand
In particular, flotation recoveries of sphalerite and galena collected by CSC-1 stand as high as 76% and 88% respectively over a wide pH range (pH 4–10), while that of pyrite is below 34%. Moreover, flotation recovery difference values between sphalerite/galena and pyrite are 50% and 62% respectively at pulp pH 8.
Galena – Sphalerite Flotation & Separation Method. The problem of treating oxidized lead-zinc ores for the production of high-grade lead zinc flotation concentrates is a complex problem due to the nature …
COLLOIDS AND A Colloids and Surfaces SURFACES ELS EVI ER A: Physicochemical and Engineering Aspects 122 (1997) 207-225 New collectors in the flotation of sulphide minerals: a study of the electrokinetic, calorimetric and flotation properties of sphalerite, galena and chalcocite G.S. Maier *, X. Qiu, B. Dobias …
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.
To further confirming the depression performance of PBTCA on the flotation separation of sphalerite and galena, the flotation tests of synthetic mixture minerals were also performed. The effect of PBTCA concentration on the recoveries of sphalerite and galena are displayed in Fig. 5. Without PBTCA, it was impossible to …
The recovery of sphalerite and galena were 3% and 91% at pH 8, respectively, a better flotation index compared with that in the single-mineral flotation test. Galena and sphalerite are narrow band gap semiconductors, and a galvanic cell may be generated when they come into contact with an electrolyte(Ke et al., 2016, Wu et al., 2020).
Although part of the zinc loss to the lead concentrate must be due to the flotation of locked particles (of galena and sphalerite) and entrainment, significant portion of zinc loss may be due to the flotation of free sphalerite. @m C C v .I3 n a. 143 138 Binding Energy (eV) Fig. 1 Cumulative grade and recovery of Pb and Zn to the first lead ...
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 …
Temperature variations could potentially impact flotation performance, leading to operational and economic issues. Several historical and currently operating plants across Canada have reported seasonal metal losses as one of their major challenges. Improvements in flotation efficiency at cold temperatures are important for …
Introduction. Galena is a common and typical lead-containing mineral on the earth (Chen et al., 2011, Huang et al., 2019b, Wang et al., 2019). It is usually associated with other sulfide minerals in the ore deposits, such as chalcopyrite (CuFeS 2), sphalerite (ZnS) and marmatite ((Fe,Zn)S) (Hayes and Ralston, 1988).Flotation is the commonly …
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 …
Flotation has been extensively used to separate galena and sphalerite. Herein, a reagent scheme comprising aerofloat collectors and Zn 2+ and SO 3 2− depressants is developed for the...
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. Micro-flotation tests showed that HPAA …
Since the most common Pb-Zn selective flotation method (Sheridan–Griswold method) sequentially recovers lead and zinc at alkali conditions, …
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 ...
The flotation tests and XPS analyses on galena, sphalerite and pyrite have been carried out in a collecting-depressing-reactivating system (hereafter referred as the CDR system). In this system, sulfide minerals were first collected and activated by the collector, and then depressed strongly by Ca(OH)2 in the strong alkaline solution, and …
An effective reagent combination plays a crucial role in the flotation separation of galena and sphalerite. In this work, potassium permanganate (KMnO4) was used to amplify the property difference ...
To farther lift the pulp pH, the flotation recovery of sphalerite and pyrite dove off, which demonstrated that APTT might realize an effecient flotation separation of chalcopyrite or galena from sphalerite or pyrite at the pH range of 8.0–11.0 [37]. Nevertheless, without extra addition of activators or inhibitors, the direct flotation ...
The FTIR spectra of minerals (galena and sphalerite) before and after treatment with SBX are obtained to better understand the difference in flotation …
Effect of pH value on galena and sphalerite flotation (C DDTC = 60 mg/L, C MIBC = 50 mg/L). Fig. 5 shows that in DI water, when the dosage of ZnSO 4 is 20 mg/L, the maximum difference in flotation recovery between galena and sphalerite was 59.40 %, and lead and zinc were most easily separated.
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, an environment-friendly sphalerite depressant 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) was exploited in the flotation …
Sphalerite is generally recovered by flotation; however, it has been established that the success of this stage is affected by surface contamination with ferric iron precipitates during grinding.
Two flotation tests were conducted to duplicate the experiment. Zinc sulfate (ZnSO 4) and dextrin (Dextrin Gul) were used in the copper-lead rougher flotation stage to depress sphalerite whereas potassium amyl xanthate (KAX) and triethylene glycol monobutyl ether (Nasfroth 240) were used as a collector and frother reagent, …
The effect of HA on the flotation of galena and sphalerite were evaluated by micro-flotation tests. The depression mechanisms were investigated by adsorption capacity, Zeta potential and X-ray photoelectron spectroscopy (XPS) analysis. The results of micro-flotation tests proved that HA was an efficient and selective 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 ...
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