قائمة الطعام
Compared with the two common collectors, sodium isobutyl xanthate (SIBX) and O-isopropyl-N-ethyl thionocarbamate (IPETC), HEBTC exhibited better selectivity for galena against sphalerite. The ...
Bio-flotation studies on galena and sphalerite have been carried out, both individually and when present together as a synthetic mixture, after bacterial interaction to assess the selectivity of separation. Possible mechanisms of interaction between the sulphide minerals and the cells are discussed.
In this paper, a novel β-Oxo thioamide surfactant 3-(ethylamino)-N-phenyl-3-thioxopropanamide (EAPhTXPA) was synthesized and first used as flotation collector for galena and sphalerite.The results of micro-flotation tests showed that EAPhTXPA possessed not only stronger collecting ability but also better selectivity to galena …
Microflotation experiments revealed that compared with Ester-105, higher flotation recovery of galena (90.75%) with significantly improved flotation selectivity against sphalerite by using MDPE of ...
Microflotation experiments revealed that compared with Ester-105, higher flotation recovery of galena (90.75%) with significantly improved flotation selectivity against sphalerite by using MDPE of ...
We discovered that the selectivity of thiourea collector is significantly better than SEXT, in which the separation efficiency of IIT collector is the highest, reaching a recovery rate for galena and sphalerite of 88.87 % and 24.37 %. The increase of contact angle of sphalerite after treated with thiourea collector is substantially larger
@article{Wang2021SelectiveFS, title={Selective flotation separation of galena from sphalerite via chelation collectors with different nitrogen functional groups}, author={Jinggang Wang and Yuehan Ji and Shaoyi Cheng and Shu Liu and Jian Cao and Pan Chen}, journal={Applied Surface Science}, year={2021}, volume={568}, …
Compared with the two common collectors, sodium isobutyl xanthate (SIBX) and O-isopropyl-N-ethyl thionocarbamate (IPETC), HEBTC exhibited better selectivity for galena against sphalerite.
An effective reagent combination plays a crucial role in the flotation separation of galena and sphalerite. In this work, potassium permanganate (KMnO 4) was used to amplify the property difference between galena and sphalerite, carboxylated chitosan (CCS) was used to selectively depress sphalerite.The mechanism of CCS in …
Compared with the two common collectors, sodium isobutyl xanthate (SIBX) and O-isopropyl-N-ethyl thionocarbamate (IPETC), HEBTC exhibited better selectivity for galena against sphalerite. The ...
Given its lower electrode potential compared with galena, sphalerite functions as an anode, and its oxidation and dissolution are enhanced in the presence of galena. ... Therefore, the mixed-mineral flotation system presents high selectivity because it enables galvanic interactions. The above results reveal that pectin is a promising …
DFT calculations demonstrated that nitrogen heterocyclic ring (conjugated thiocarbonyl and diazole structure), paralleled electron pairs location lobes, and ring tension provided CSC-1 collector with preferable chelating selectivity towards Pb 2+ and Zn 2+ and deserved it to possess better flotation selectivity for sphalerite and galena against ...
At pH ~9.8 (CaO concentration ~ 1.0 × 10 −4 mol·L −1), ATT exhibited an excellent flotation selectivity for separating galena versus sphalerite, and the flotation …
Galena (PbS) and chalcopyrite (CuFeS2) are sulfide minerals that exhibit good floatability characteristics. Thus, efficiently separating them via common flotation is challenging. Herein, a new method of surface sulfuric acid corrosion in conjunction with flotation separation was proposed, and the efficient separation of galena and …
TABLE 5 2-Mercaptobenzothiazole in flotation of galena, chalcocite and sphalerite 1391 Experimental data of the adsorption and thermochemical measurements of POMBT on chaleocite. AHl in mJ/m~ is related to the specific surface area and AH2 in kJ/mol is related to the adsorbed amount of POMBT. ... Good selectivity was observed …
During the separation of sulfide minerals, the problem of low selectivity always arises. A novel thiadiazole derivative (CSC-1) was developed for the flotation of sulfide minerals. The results of flotation tests showed that, compared with the conventionally-used ethyl xanthate, using CSC-1 as the collector, higher flotation recoveries of sphalerite and galena with …
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]. ... Flotation tests indicated that EAPhTXPA possessed superior collecting ability and selectivity for galena against sphalerite than ...
Also, It has been shown that, Pb(OH) + adsorbed on the galena or sphalerite surface can reduce the collector ability for the galena flotation in the pH values between 7 and 9.5, but had a ...
The selectivity of galena flotation from a synthetic mixture with sphalerite and quartz and from a typical Broken Hill ore has been determined. ... unactivated sphalerite for test 2 in which the collector addition was much smaller than in test 1 in order to achieve selectivity between galena and sphalerite. In contrast to Fig.l, flota- tion ...
A series of new thiourea collectors with diverse hydrophobic were synthesized for galena and sphalerite separation. • Competitive coordination analysis reveals the preferred coordination between thiourea and Pb 2+ ion.. DFT investigations reveal the collector selectivity trend and the thiourea collector-surface interaction mechanism.
Micro-flotation results demonstrated that ATT selectively floated out galena from its mixture with sphalerite at pH ≤10.5. FTIR (Fourier transform infrared), adsorption capacity and contact angle indicated that to increase the pulp pH from ~6.2 to 10.0 dramatically reduced the adsorption of ATT on sphalerite, while had an insignificant …
The optimal results, with a galena recovery of 86% and selectivity, relative to chalcopyrite, sphalerite, and pyrrhotite at 58, 63, and 68%, respectively, were reached with a water quality of 5 mg ...
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 of …
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.
The principle of zinc inhibition and lead flotation is often used in the separation of Pb-Zn sulfide ores because the natural floatability of sphalerite is much …
Furthermore, MDPE exhibited a more powerful flotation capacity towards galena and superior flotation selectivity against sphalerite at the concentration of 2 × 10 −4 mol/L at low alkalinity (pH=8.5). Mechanistic research confirmed that MDPE could selectively enhance the surface hydrophobicity of galena, but had little influence on …
Download scientific diagram | Selective flotation of sphalerite and galena in the presence of unfractionated or thermolysed and fractionated components of B.circulans. a-normal cells; b ...
Abstract. An effective reagent combination plays a crucial role in the flotation separation of galena and sphalerite. In this work, potassium permanganate (KMnO 4) …
Sphalerite and galena are the primary sources for the extraction of Zn and Pb. However, these two minerals generally associated closely with each other in nature [3]. Since both sphalerite and galena are valuable minerals, the effective separation of these two minerals is important to make the plane profitable. ... nevertheless, the selectivity ...
In the galena/sphalerite flotation, aerofloat was used as the collector to replace xanthate, and Zn 2+ and SO 3 2 ... (ADD) and aniline aerofloat (AAF), exhibit superior selectivity for galena over sphalerite (Fig. 4). The static calculations show that ADD and AAF have nearly the same adsorption energies on the sphalerite and galena …
حقوق النشر ©2000- 2024 شركة شنغهاي زينيث
