The critical importance of pulp concentration on the flotation …
The Qixia orebody is a complex lead–zinc sulfide system with pyrite gangue and minor amounts of copper. In order to improve the flotation results, laboratory scale flotation testing of ore ...
Froth Flotation of Chalcopyrite/Pyrite Ore: A Critical Review
The addition of zinc sulfate (2000 g/t) caused, after 8 min of flotation, a decrease in the pyrite recovery from 58% to 34%. The authors suggested selective …
Feasibility Study of Differential Flotation of Cu–Pb–Zn …
In this research, flotation of copper, lead and zinc minerals from a copper oxide–sulfide ore was studied. The identification tests showed that the sample is a mixture of quartz, chalcopyrite ...
Sulfide Flotation
Sulfide ore flotation is a complex electrochemical system. ... Understanding the mechanism of arsenian pyrite flotation is particularly important given that it is the principal gold carrier in the very important submicron gold ... Farjana et al. analysed the environmental burdens associated with gold–silver–lead–zinc–copper ...
Effects of Process Parameters on Selective Flotation of …
flotation of lead and zinc bearing minerals. For flotation of zinc the xanthate dosage was varied from 0.094 kg/t to 0.752 kg/t. The results are shown in Fig. 6. These experiments were carried out using feed with 38.5% -0.074 mm at pH 8.5. As it is evident an increase in xanthate dosage from
Flotation of Lead-Zinc Ores
The Qixia orebody is a complex lead–zinc sulfide system with pyrite gangue and minor amounts of copper. In order to improve the flotation results, laboratory scale flotation testing of ore ...
Formation of zinc sulfide species during roasting of ZnO with …
Flotation is the most common and commercial technique applied to recover nonferrous oxide minerals and for zinc recovery, sulfidization with alkali metal sulfides, …
Assessing the depression of high-concentration pyrite in …
Fig. 2 shows that as pH increased from 9.0 to 10.5 and then to 11.5, the pyrite recovery obtained from the flotation of the ore with 5 % pyrite decreased steadily from 94.5 to 40.6 % and then to 10.3 %. Hence, a direct link between the decreased pyrite recovery in Fig. 2 and the increased Cu grade in Fig. 1 when pH increased could be …
Effect mechanism of carbonaceous materials on the flotation …
Flotation, which is based on the differences in hydrophobicity of minerals, is an effectively and commonly used method for separating sphalerite (ZnS) and galena (PbS) minerals from lead–zinc ore [4], [5]. The two minerals are generally closely associated with other gangue minerals in deposit, such as pyrite, quartz, calcite, dolomite, and ...
Surface chemistry investigation of froth flotation products …
Real ore sample flotation separation tests showed that the mixed depressant can efficiently depress pyrite from galena-pyrite mixed concentrate. The obtained galena concentrate had a Pb recovery ...
Depression of pyrite in the flotation of high pyrite low-grade …
In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and …
Study on flotation recovery of typical carbon-bearing lead-zinc …
Lead flotation tailings were used as the feed ore for the zinc flotation tests. The effects of different types of reagents on the zinc flotation indices were investigated, the flotation process is shown in Fig. 12 and the results of each reagent test are shown in Fig. 13. Download : Download high-res image (136KB) Download : Download full-size ...
(PDF) Depression of pyrite in the flotation of high pyrite …
Ore characterization A low grade Pb–Zn ore sample, containing 31% pyrite and 44% dolomite and assayed at 2.34% Pb, 6.91% Zn and 15.36% Fe, was prepared from the Kooshk mine in Yazd province, Iran, and used as the primary ore in flotation and bioflotation experiments.
Maximise pyrite depression in copper ore flotation using …
The depression of pyrite in copper ore flotation is a challenge in high salinity water although natural pyrite can be depressed readily at alkaline pH due to the formation of iron hydroxides on pyrite surfaces ( Boulton et al., 2001, Mu et al., 2016 ). In copper ore flotation, a galvanic interaction occurs between copper minerals and pyrite ...
The effect of zinc cyanide on the flotation of gold from pyritic ore
Guo et al. [8] used surface-enhanced Raman spectroscopy to study the effect of zinc cyanide on the flotation of gold from pyrite. The results showed that free cyanide has no inhibition effect on ...
Dispersion effect on a lead–zinc sulphide ore flotation
A lead concentrate with 65.42% Pb was produced with 77% recovery as a result of six stage flotation experiment carried out with 350 g/t KAX, 250 g/t Aero 407 and 4500 g/t Na 2 S and 98.7% of zinc remained in the tailings with 12.23% Zn content. As a result of gravity concentration followed by flotation, a lead concentrate with an average Pb ...
Flotation of Copper-Lead-Zinc Ores
The polymetallic separation flowsheet of copper/lead bulk flotation - copper/lead separation - priority flotation zinc ... [Show full abstract] and pyrite from the bulk flotation tailings was used ...
A case study on marmatite- pyrite/pyrrhotite selective flotation …
Zinc occupies a vital position in modern industrial production, and zinc metal is mainly extracted from marmatite or sphalerite.Marmatite or sphalerite is often associated with pyrite and pyrrhotite in natural polymetallic sulfide deposits. Therefore, how to well achieve the selective separation of marmatite or sphalerite from associated pyrite and …
How to Process Low-Grade Lead Zinc Ore by …
Lead and Zinc Pb-Zn Separation Process Circuit. Primary Washing and Crushing. A Drag or Conveyor is used to bring the dump material to a Revolving Trommel Screen which discards all plus 2″ …
A Process Mineralogy Approach to the Flotation of Complex Lead–Zinc
Complex and non-sulfide lead–zinc ores are difficult to concentrate, but the growing demand for lead and zinc metals necessitated their beneficiation. Froth flotation is practically the most effective method in their beneficiation when optimum flotation conditions are attained. The aim of the current study is to use process mineralogy as a …
A Process Mineralogy Approach to the Flotation of Complex Lead–Zinc
In the rougher flotation stage, a lead concentrate with 17.29 % Pb and a zinc concentrate with 9.89 % Zn could be obtained by 76.71 % lead and 15.49 % zinc recoveries from the ore samples ...
Froth Flotation of Chalcopyrite/Pyrite Ore: A Critical Review
Chalcopyrite and pyrite show recovery of over 90% when working with SBX and MIBC at pH 4–10. An increase in pH to 11.5 allowed lowering the pyrite recovery to 63%. However, when using PCA, pyrite flotation was significantly reduced at pH 4–8, while chalcopyrite was slightly affected, with recoveries over 90%.
Pyrite flotation in the presence of metal ions and sphalerite
Influence of the Interaction between Sphalerite and Pyrite on the Copper Activation of Sphalerite. Bo Yang X. Tong Z. Lan Y. Cui Xian Xie. Materials Science, Chemistry. 2018. In this paper, the effect of pyrite on the activation of sphalerite was investigated by micro-flotation, copper adsorption experiments, X-ray photoelectron …
Selectively Depress Copper-Activated Pyrite in Copper Flotation …
Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu(I/II) induced by sodium metabisulphite (MBS) was exploited to selectively depress the flotation of copper-activated pyrite at pH 8.0. Electrochemical …
Improvement of flotation behavior of Mengzi lead-silver-zinc ore …
The electrochemical behavior of Mengzi lead-silver-zinc ore flotation system was studied. ... pyrrhotite and pyrite is high. The flotation speed of minerals containing silver is fast QING Wen-qing, et al/Trans. Nonferrous Met. Soc. China 18(2008) 953 too, due to the fact that silver is mainly locked in galena minerals. ...
Flotation of Gold and Gold-Bearing Ores
Flotation takes place at neutral or slightly acid pH values with the addition of lead nitrate as activator and xanthate as collector. The Campbell Mine in Ontario (Chang et al., 1983) treats an arsenopyrite–pyrite ore and the flotation concentrate is pressure leached. Flotation reagents consist of copper sulfate as activator, PAX and AF208 as ...
Sulfidation mechanism of ZnO roasted with pyrite
For example, Li et al. 32 investigated the recovery of lead and zinc from low-grade lead-zinc oxide ore by sulfidation roasting and flotation process. The results showed 79.5% Pb and 88.2% Zn were ...
Mineralogy and Innovative Flash Flotation Separation of Cu …
The results demonstrate that the ore consists of 35 categories of minerals, assaying Cu 7.99%, Pb 9.39%, and Zn 1.96% in the forms of chalcopyrite, galena, and sphalerite, respectively, and silver ...
Polysaccharides-based pyrite depressants for green flotation …
Monyake et al. [108] studied the depression ability of chitosan-grafted-polyacrylamide (Chi-g-PAM) in separating a complex sulfide ore from Mississippi Valley comprising chalcopyrite, galena, sphalerite, and pyrite (Fig. 13). Flotation outcomes revealed that Chi-g-PAM was preferentially adsorbed onto pyrite particles among all …
A reagent scheme for galena/sphalerite flotation separation: Insights
Herein, a reagent scheme comprising aerofloat collectors and Zn 2+ and SO 3 2− depressants is developed for the flotation separation of galena from sphalerite-rich sulphide ore. The flotation results demonstrate that Zn 2+ and SO 3 2− provide a synergistic depression effect on sphalerite and the aerofloat collectors exhibit more …