galena flotation bioleaching

The zinc dissolution rate under bioleaching process was increased due to the cumulative effects of the flotation reagents at the concentration ranges needed to float both galena and sphalerite ...

Since the bioleaching rate and the levels of leached arsenic are limited (22–33% of the originally present in the concentrate), proper conditions of solubilization …

Flotation tests revealed that galena was almost completely depressed after interaction with the cells both in the absence and in the presence of the collector, and selective flotation tests confirmed that sphalerite could be preferentially floated from galena, which was depressed by the bacterial cells. Expand

Bioleaching is the conversion of insoluble metals ... The most common sulfide minerals are pyrite (FeS 2), chalcopyrite (CuFeS 2), sphererite (ZnS), and galena (PbS). They may trap precious ... methods can be divided into physical (gravity and magnetic separation), chemical (leaching), physicochemical (flotation and oil …

Shake flask bioleaching of original polymetallic sphalerite ore from the Freiberg mining district (400 mg/kg indium) showed maximum zinc and indium recovery …

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. ... Improvement of zinc bioleaching from a zinc flotation concentrate using mechanical activation. Minerals Engineering, Volume 163, …

Bioleaching of galena flotation concentrate @article{Pacholewska2004BioleachingOG, title={Bioleaching of galena flotation concentrate}, author={Malgorzata Pacholewska}, journal={Physicochemical Problems of Mineral Processing}, year={2004}, volume={38}, pages={281-290} } M. Pacholewska; Published 2004; Materials Science

The main purpose of this paper is to summarize the research on bornite (bio)hydrometallurgy. Leaching and bioleaching behavior of bornite are summarized, including co-leach with other sulfide minerals. The intermediate products and possible surface substances during bornite dissolution are discussed. Previous.

Bioleaching, as a relatively novel process for the extraction of metals from flotation concentrates and tailings seems to be a promising option for such purposes. In …

The rate of flotation of galena in the slimes fraction was retarded, again due to oxidation of the galena. ... Bioleaching of marmatite flotation concentrate by Acidithiobacillus ferrooxidans and ...

The results of the bioleaching process of the galena flotation concentrates from ZGH Boleslaw S.A. by Acidithiobacillus ferrooxidans bacteria have been presented. It has …

Flotation of chalcopyrite and galena with BX as collector. Fig. 2 shows that chalcopyrite and galena are readily floatable with BX as collector within the whole pH range, however, the flotation recovery of galena decreases rapidly in the pH value from 8.5 to 12, complementing the findings investigated by researchers [21], [22].

The bioleaching of low-grade chalcopyrite-bearing ores with acidophilic microbes offers alternative methods to conventional leaching and has developed rapidly in many countries (He et al., 2012). ... Investigations on the selective depression of fenugreek gum towards galena and its role in chalcopyrite-galena flotation separation. 2021 ...

The results of the bioleaching process of the galena flotation concentrates from ZGH Boleslaw S.A. by Acidithiobacillus ferrooxidans bacteria have been presented. It has been recorded that the final level of conversion of SS into S SO4 in bioleaching process is about 48% and it is two-fold higher than in the control examinations. However, in ...

The effects of Cu2+, Fe2+ and Fe3+ ions on the bioleaching of marmatite flotation concentrate were studied and compared with those of the marmatite leaching under the sterile controls.

The zinc sulfide concentrate (Table 1) and pure flotation collectors (NaEX, KIPX, KIBX, KAX, and Aero3477), and frothers (PO and MIBC) (Table 2) were prepared from the mineral processing laboratory at the University of Tehran, Iran.To better observe the interactions of these reagents with bioleaching factors, a wide dosage of them were …

To better understand the bioleaching process of chalcocite, researches on chemical−biological dissolution mechanisms and leaching kinetics are reviewed. The crystal structure of chalcocite is systematically characterized. ... Electrochemical mechanism and flotation of chalcopyrite and galena in the presence of sodium silicate and sodium sulfite.

Bioleaching uses the iron- and sulfur-oxidising metabolisms of acidophilic microorganisms to extract metals from ore. Sulfur oxidation is a complex, multi-step process that is facilitated by a large number of enzymes, as demonstrated by the most complete model of sulfur oxidation in the extremophile A. ferrooxidans.

The mechanism of galena oxidation is important in flotation processes, where mineral oxidation, through the grinding/flotation circuit, can affect its hydrophobicity and, …

Bioleaching is the metal-extracting practice from sulfides and/or iron-containing ores by means of microorganisms. It is a specified biohydrometallurgical approach in which either the metabolic activities or microbe's products are used to convert insoluble compounds into soluble form, which can then be recovered later [].Biological …

The bioleaching of an Iranian zinc flotation concentrate was evaluated by a mixed culture of moderate thermophilic microorganisms (Ahmadi and Mousavi, 2015). Mechanical activation is considered as one of the solid processing technologies and has been used in many systems ( Godočı́ková et al., 2002 ).

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 ...

Fourier transform infrared (FTIR) spectra of the galena concentrate residues in semi-direct bioleaching at bioleaching parameters of 5% w/v pulp density, 5 g/L FeCl 3, 50 g/L …

The results of the bioleaching process of the galena flotation concentrates from ZGH Boleslaw S.A. by Acidithiobacillus ferrooxidans bacteria have been presented. It has been recorded that the final level of conversion of S S into S SO4 in bioleaching process is about 48% and it is two-fold higher than in the control examinations.

Abstract. The flotation reagents absorbed on the mineral surfaces may have some positive or negative effects on the bacteria involving in the bioleaching process; …

Pupil type and pulp pH play an important role in the lead–zinc ore flotation process and pH 8 and pH 6 were selected as optimum pH values for lead and zinc flotation circuits, respectively. Collector type and pulp pH play an important role in the lead–zinc ore flotation process. In the current study, the effect of pulp pH and the collector type …

The results of the bioleaching process of the galena flotation concentrates from ZGH Boleslaw S.A. by Acidithiobacillus ferrooxidans bacteria have been presented. It has been recorded that the final level of conversion of S S into S SO4 in bioleaching process is about 48% and it is two-fold...

Background. The term bioleaching refers to the bacterial conversion of an insoluble metal (usually a metal sulfide, e.g., CuS, NiS, ZnS) into a soluble form (usually the metal sulfate e.g., CuSO 4, NiSO 4, ZnSO 4).When this happens, the metal is extracted into water [1,2].The first bacterium discovered that was able to oxidize minerals was …

Bioleaching of a marmatite flotation concentrate by Acidithiobacillus ferrooxidans was carried out at 35 °C and an initial pH of 2.0 on an orbital shaker at ... galena and quartz, as impurities in the concentrate, were more resistant to bacterial oxidation than marmatite, so the marmatite dissolved preferentially in the mixed sulfides …

Fig. 2 shows that chalcopyrite and galena are readily floatable with BX as collector within the whole pH range, however, the flotation recovery of galena decreases rapidly in the pH value from 8.5 to 12, complementing the findings investigated by researchers [21], [22].It is well known that sulfides interacts readily with xanthate species, …

The PZCs of sphalerite, galena, and pyrite were 4–5 in a study on sulfide mineral flotation using recycled water. Liang et al. [ 26 ] showed that the PZC of chalcopyrite in a bioleaching experiment using Sulfolobus metallicus YN24 was 3.80, and the PZC of pyrite was 2.7 [ 27 ].

Physicochemical Problems of Mineral Processing, 38 (2004) 281-290 Fizykochemiczne Problemy Mineralurgii, 38 (2004) 281-290 Ma ł gorzata PACHOLEWSKA * BIOLEACHING OF GALENA FLOTATION CONCENTRATE Received May 13, 2004; reviewed; accepted June 30, 2004 The results of the bioleaching process of the galena …

Materials. The molybdenite flotation tailings associated with galena used in this study were obtained from the molybdenum concentrator plant location within Henan province, China. The molybdenite flotation tailings were enriched by flotation in Pb (to 20–25%) and had a Mo content of up to 2.4%. The X-ray diffraction (XRD) pattern of the ...

Flotability of galena and pyrite using 2-mercaptobenzimidazole as a chelating agent: Adsorption characteristics and flotation mechanisms Mingyu Zheng Tie-Kun Peng +4 authors Q. Lu Chemistry, Materials Science

Bioleaching is a process that employs micro-organisms to dissolve (leach) sulphide minerals. It finds application in the extraction of metals from their ores. Although bioleaching was used ...

The bacterium Thiobacillus ferrooxidans triggers the surface modification of sulfide minerals to provide hydrophilicity or hydrophobicity for the flotation of sphalerite and galena. The effects of initial cell concentration, period of biotreatment and pulp density on the floatability of the minerals are discussed. With galena, flotation enhancement …