Galena is an important source of industrial lead (Hu et al., 2020). However, galena is often symbiotic with sphalerite (Luo et al., 2016); making separation challenging. Flotation is the most effective technique for the separation and recovery of galena (Bandini et al., 2001) and the flotation reagent is vital to its efficiency.

The results from the flotation study on a laboratory scale at optimized conditions were a 54.1% increase in total carbon, a 42.12% reduction in ash, and a 38.32% reduction in sulfur.

For investigating the flotation reagent molecules interactions with Ag-bearing galena, the frontier orbital models of flotation reagent molecules including ammonium dibutyl dithiophosphate (ADD), ethyl xanthate (EX), and diethyldithiocarbamate (DDC) and the above three Ag-bearing galena crystals have been geometry optimized by Dmol 3 …

Abstract. This communication presents a model structure for the flotation recovery of middling particles (10–90% liberation). Fourteen datasets from the literature were studied (galena flotation), which …

In additional, it was obtained quantitative models for the necessary xanthenes concentration of lead sulphide complete flotation in the case of different oxidation products of galena surface in pH ...

quantitative physico-chemical models for the necessary xanthenes concentration of lead sulphide complete flotation in the case of different oxidation products of galena surface …

A flotation device named Aerated Jet Flotation Cell (AJFC) was adopted to improve the separation efficiency of galena flotation. Reducing bubble size and optimizing turbulence distribution...

The fundamental flotation model due to Pyke (2004) was implemented in an Eulerian–Eulerian multiphase framework to predict the flotation rate constants of chalcopyrite and galena. The details of the model development have been elaborated in the first part of this manuscript (Karimi et al., 2014).

In the concentrators of a Mexican mining company has been observed that the pH of the flotation has a significant effect on the galena recovery: the increase of pH from 7.5 to 9.5 in the Pb/Cu ...

to achieve a desired separation performance of galena flot ation. Separation efficiency of 62.54 % at a. residence time of 2.25 min was achieved by AJFC, while separation efficiency of 59.12 % at ...

An artificial neural network (ANN) is a mathematical structure that is used to identify relationships between input and output data that have complex, nonlinear characteristics (Hsu et al., 1995).In the case of flotation, models to represent relevant phenomena by using ANN have been proposed (Gupta et al., 1999, Al-Thyabat, 2008, …

Another industrial flotation circuit simulator is based on the HSC SIM® simulation model (Mattsson et al., 2015) which is useful for new circuits design, for comparison of cell sizes and ...

Single-mineral flotation tests exhibit that MA/AA has a much better depression ability and selectivity than those of traditional galena depressants (Na2S and K2Cr2O7), which can inhibit the ...

On the basis of the results of flotation, contact angle, FTIR and ion dissolution tests and AFM imaging, the synergistic depression mechanism of Pb 2+ and NaHA on galena could be revealed and a possible adsorption model of Pb 2+ and NaHA on mineral surfaces at water/particle interface was put forward, as shown in Fig. 14. NaHA is …

Semantic Scholar extracted view of "Inhibition of galena flotation by humic acid: Identification of the adsorption site for humic acid on moderately oxidized galena surface" by Xingjie Wang et al. ... The pseudo-second-order kinetics model and Longmuir isotherm model could adequately interpret the HA adsorption process for the studied ...

Two proposed models for flotation rate constant, Eq. (22.1) and Eq. (22.2), differ by last multipliers. Therefore those multipliers have been examined in this research in order to observe differences or similarities for mineral particles with various surface coverage of the collector and roughness. ... Thus the galena particles of size 150 ...

proposed model structure allowed galena recovery to be described for a liberation range of between 10% to 90%. This range can be changed depending upon the flotation response,

2014 Bentham Open. Fig. (1). XRD analysis of the galena sample (1- galena 2- sphalerite 3- quartz). contains 73.69% Pb, 13.5% S, 1.38% Fe, 1.26% Zn, 0.2% Cu and some silica (quartz) impurity. The XRD analyses of the sample showed that the main mineral phase present was the galena (Fig. 1). The sample was initially crushed with a jaw crusher and ...

The results of the mineral flotation tests show that both chalcopyrite and galena are floatable in a pH range of 6–12 and the composite depressant has a stronger inhibitory effect on galena than ...

Keywords: Flotation, Galena, Thermodynamic analysis, Modeling, Environment. INTRODUCTION Flotation is undoubtedly the most important and versatile mineral processing technique, and both its use and application are continually being expanded to treat greater tonnages and to cover new areas. (Wills, 2005).

Moreover, the molecular dynamics models of the three collectors ions interacting with Ag-bearing galena {100} surface are constructed and simulated, and the results proved that ADD has the best ...

The effct of pulp temperature change on galena flotation was studied though the single mineral flotation test with butyl xanthate (NaBX) as the collector and 4-Methyl-2-pentanol (MIBC) as the frother. Meanwhile, the effect mechanisms of pulp temperature change on recovery were investigated by infrared spectrum, Zeta potential, …

Quantitative physico-chemical models of minimum necessary xanthenes concentration of lead sulphide complete flotation can be derived by a perfect studying of …

galena surface model. The galena (1 00) surface model measures a length of 23.95 Å, a width of 11.98 Å and a height of 5.75 Å with 48 Pb

characterizing and modeling galena flotation system is the thermodynamic analysis method; witch is applied largely for a long time for the study of the chemical, geochemical and hydrometallurgical processes. The utility of this method in the field of mineral processing (and particular in flotation) is shown in (Abramov, 1978, ...

The flotation results showed that BDT had good flotation selectivity for chalcopyrite and galena, which achieved up to 96.67% and 50.26%, respectively, at pH 6 using a collector dosage of 100 g/t.

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 …

Froth flotation is the most versatile process in mineral beneficiation, extensively used to concentrate a wide range of minerals. This process comprises mixtures of more or less liberated minerals, water, air, and …

2.1. Flotation experiment. The floatabilities of the single and mixed minerals (galena and chalcopyrite at a 3:1 mass ratio) were determined in a suspended flotation machine (Jinlin Exploration Machinery Plant XFD IV-15, China).The mineral suspension was prepared by adding 20 g mineral powder to 80 mL of KNO 3 solution (0.1 mol·L −1) …

Flotation is the most effective method to separate galena and sphalerite ( Bandini et al., 2001). It uses the difference in the surface hydrophobicity of minerals to …

This paper reviews studies of galena electrochemical flotation behavior. The electrochemical mechanisms on galena surfaces of oxidation, collector adsorption and …

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 ...

Galena flotation also shows a marked dependence on Eh, a point all too often overlooked in extant texts [e.g. 4]. The flotation of galena from an ore in the presence of ethyl xanthate is shown in Figure 3 [18], where the ore has been ground in a cast iron ball mill. There is a strong dependency on Eh, with a maximum occurring at 100 mV SHE at a ...

In this study, the flotation behavior of pectin-treated galena and chalcopyrite in the presence and absence of copper sulfate was investigated through micro-flotation tests. Results showed that pectin merely depressed galena and chalcopyrite flotation under alkaline conditions while selectively imparting strong hydrophilicity to the copper ...

Laboratory tests of relationship between kinetics of flotation of pure galena smaller than 38 μm in size and concentration of potassium butyl xanthate show that flotation rate undergoes considerable reduction when mineral grains are under 18 μm in size. Size grades below 18 μm show the slowest flotation rates that are nearly equal at …

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 the …

In this study, the behavior of the individual flotation of galena (PbS), cerussite (PbCO 3) and anglesite ... Thermodynamic modeling suggests that the observed behavior is due to the presence of hydrocerussite (Pb 3 (CO 3) 2 (OH) 2), of hydrophilic nature, on the mineral surfaces. OHA proved to be the most effective collector; …