The research proposes an innovative galena depressant, known as Phosphonyl carboxylic acid copolymer (POCA), to enhance the efficiency of flotation separation between chalcopyrite and galena. Mineral flotation tests were conducted to investigate the flotation performance of chalcopyrite and galena.
Froth flotation is a widely used method for separating impurity minerals such as galena and chalcopyrite from molybdenum concentrates [14], [15], [16], [17].However, achieving highly selective separation remains challenging due to the similar and favorable floatability of both molybdenite and galena [18], [19].Therefore, effective depressants are essential for enhancing …
Several processes have been developed for the separation of lead from zinc sulphides by two-stage selective flotation, but the only method that is employed widely enough to warrant a description in these pages is the one whereby the zinc minerals are depressed by sodium cyanide and/or zinc sulphate, allowing the galena, which remains unaffected ...
Conversely, the high-temperature pre-oxidation had a minimal effect on the surface of chalcopyrite, indicating selective oxidation benefits. Findings from the pre-oxidation floatation separation test of galena–chalcopyrite mixtures revealed the efficient and thorough separation of the two minerals under high-temperature pre-oxidation conditions.
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 chalcopyrite was successfully realized. …
Low alkalinity is the most common condition for sulphide minerals separation, so H 2 O 2 is a promising inhibitor for Cu-Pb separation. Download: Download high-res image (135KB ... the Cu ion concentration of chalcopyrite and galena mixed minerals increases from 0.16 ppm to 0.52 ppm and the Pb ion concentration increases from 0.18 ppm to 9.76 ...
Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences: Host {{subColumn.name}} ... DONG Yan-hong. Research on Mechanism and Effects of a New Inhibitor on the Separation of Chalcopyrite and Galena[J]. Multipurpose Utilization of Mineral Resources, 2011, (6): 44-48. doi: 10.3969/j.issn.1000-6532.2011 ...
Microbially-induced separation of chalcopyrite and galena. Partha Patra. 2008, Minerals Engineering. visibility ...
The oxidation pretreatment method enables the separation of galena and chalcopyrite without the need for a depressant. The XPS and AFM measurements revealed a significantly higher oxidation degree of galena compared to chalcopyrite after treatment with PMS, indicating a notable difference in their floatability.
Galena, a mineral of both historical and geological significance, is a lead sulfide mineral with the chemical formula PbS. It stands out with its distinctive metallic luster and cubic crystal structure, often appearing as shiny, cubic or octahedral crystals. ... Dispersion: Galena does not show dispersion, which is the separation of light into ...
The study of the depression effect of non-toxic depressants on the flotation separation of chalcopyrite from galena is of great importance for both industrial applications and theoretical research.
The mechanism of CCS in the separation of galena and sphalerite was investigated by microcalorimetric measurements, X-ray photoelectron spectroscopy (XPS) and Fourier …
Finally, the efficient separation of galena–chalcopyrite mixtures was further confirmed through the effective separation of galena and chalcopyrite via high-temperature sulfuric acid pre-oxidation without the need for flotation inhibitors and traps. Moreover, the sulfuric acid used in this process can be recycled. ... In mineral processing ...
Pyrite must be separated from galena during the beneficiation stage because it releases toxic gases during pyrometallurgy. However, the separation of the two minerals presents a huge obstacle as they have comparable hydrophobicity. This work offers an environmentally friendly pyrite depressant, pullulan polysaccharide (PP), for concentrating ...
Minerals 2021, 11, 796 3 of 14 Table 2. Chemical phase of copper and lead in the copper–lead bulk concentrate (wt %).
In the flotation system of binary minerals, the selective separation of pyrite and galena is considerably improved at pH=8.00 with the introduction of 40 mg/L PP, corresponding to a galena recovery of as high as 91.55 % and a
technical problems in the flotation separation of galena and other gangue minerals [14]. In addition, large amounts of fine and ultrafine particles are formed during the comminution process when a certain liberation rate is required on site, impeding …
In the flotation separation of galena-pyrite mixed concentrate, large amounts of lime (CaO) are used for the depression of pyrite. In this study, the negative effects of lime were reduced by using an efficient depressant Na 2 SO 3 + CaO reagent in the flotation separation of galena from pyrite. Real ore sample flotation separation tests showed ...
Advanced analytical techniques reveal SP induced surface modifications and propose a selective flotation mechanism. The successful separating galena and chalcopyrite by flotation presents difficulties owing to their analogous surface chemical properties.
This review provides an overview of the advancements in the research of flotation separation reagents for chalcopyrite and galena, including collectors and depressants, and …
In this work, to achieve efficient separation of chalcopyrite from galena in Cu–Pb sulfide minerals, pre-oxidation by sodium persulfate (Na 2 S 2 O 8) was used to magnify the differences in the floatability of two minerals in the presence of calcium lignosulfonate (CLS).The micro-flotation results of chalcopyrite and galena showed that pre-oxidation by Na 2 S 2 O 8 …
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], [8].The special adaptability and effectiveness of …
flotation and examined the interactions between galena and fine calcite particles in suspension pulp. The best flotation behaviour was observed for pure galena minerals at pH 9; however, the …
Utility of microorganisms and associated extracellular biopolymers in the selective separation of galena from a binary mixture of galena and sphalerite or pyrite has been reported earlier (Santhiya et al., 2000, Santhiya et al., 2001, Patra and Natarajan, 2004, Patra and Natarajan, 2006).Paenibacillus polymyxa has been used for the current investigation and it is a …
Utilization of novel and highly efficient organic depressants in separation of various minerals in flotation is always a research hotspot. Herein, polymaleic acid (PMA) was utilized as an eco-friendly depressant with high affinity for lead to effectively separate chalcopyrite from galena via the flotation method.
The electrochemical environment of the pulp (pH, Eh, and DO) is another crucial factor affecting the flotation behavior of galena. Galena exhibits an excellent collectorless and collector-induced floatability under acidic pH conditions, and its floatability gradually decreases with increasing pH [].Hu et al. have suggested that the surface oxidation and collector …
In this paper, the flotation separation of galena and pyrite in seawater was tested, and the mechanism was analyzed. Compared with that in deionized water, the lead grade of concentrate in seawater flotation increased from 57.40 to 60.20%. Meanwhile, the recovery of galena declined from 68.66 to 61.17%, and the SI value increased from 2.020 to ...
The influence of oxidizer hydrogen peroxide (H 2 O 2) on the chalcopyrite and galena flotation separation using sodium lignosulfonate as the depressant was studied and the mechanism of H 2 O 2 enhance depression action of sodium lignosulfonate was discussed in this study. The results show that both chalcopyrite and galena have good floatability when using …
The separation of molybdenite and galena was unsatisfactory without DLD because of the low SI (4.36). The mixed-mineral flotation system (Fig. 5) achieved a higher recovery of galena compared with the single-mineral flotation system (Fig. 4), which may be probably primarily
A method of air oxidation pretreatment at 170 °C was developed for the selective separation of chalcopyrite and galena. Single mineral and artificially mixed mineral flotation experiments indicated that the hydrophobicity of chalcopyrite was greatly reduced, and galena maintained outstanding floatability after pretreatment by high-temperature air oxidation.
Galena (PbS) and chalcopyrite (CuFeS 2) are sulfide minerals that exhibit good floatability characteristics. Thus, efficiently separating them via common flotation is challenging.
Lead has outstanding resistance to corrosion and radioactive penetration, and as such is widely applied in the electrical, chemical, and construction industries [1].Galena, the primary natural resource for refining lead, is commonly symbiotic with pyrite, sphalerite, and nonmetallic gangue minerals [2], [3].The gradual depletion of lead deposits with high lead grades has resulted 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 flotation...
Galena Group. Galena is the primary ore mineral of lead. Worked for its lead content as early as 3000 BC, it is found in ore veins with sphalerite, pyrite, chalcopyrite, tennantite-tetrahedrite, etc. and in skarns, as well as in sedimentary rocks where it may replace carbonate beds or be deposited in pore spaces.
The role of hydrogen peroxide (H 2 O 2) and hydroxyethyl cellulose (HEC) in the flotation separation of chalcopyrite and galena has been investigated and the reason why H 2 O 2 can enhance the depression effect of HEC has been explained. The results show that either H 2 O 2 or HEC can depress galena selectively, but the reagent concentration needed is large. A …
sulfide minerals, namely, chalcopyrite (CuFeS2)' galena (PbS), sphalerite (ZnS) and pyrite (FeS2) to be exploited in flotation and/or magnetic separation by using microwave energy because these minerals are the main constituents of the complex ore deposits all over the world. Material and experimental study
reducing contamination of the zinc concentrate by lead. The increased sphalerite and galena liberation also significantly reduced the production of LGM concentrate. The second area of …
The review aimed to provide a deep understanding on the factors affecting Cu/Pb flotation separation as well as to develop new depressants helping to guide the flotation separation of Cu/Pb/Zn polymetallic sulfide ores …