قائمة الطعام
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 ...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
Evaluation of tailings from processing plants is always an important issue. Lead-Zinc ore tailings containing 3.12% Zn, 3.43% Pb, 0.71 g/t Au and 74 g/t Ag was subject to this study.
WhatsApp: +86 18221755073
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 parameters on the galena and...
WhatsApp: +86 18221755073
Some minerals like Iron pyrite will not float well in an alkaline flotation circuit. An alkaline solution is also slightly caustic, this will help clean the surface of the mineral. ... Its application is confined mainly to the flotation of lead and zinc ores and tailings. Some inorganic salts decompose it and it is therefore often necessary to ...
WhatsApp: +86 18221755073
The active surface entities were found to be metal xanthates for chalcocite and bornite, dixanthogen for pyrite, metal xanthate for initial flotation of chalcopyrite and dixanthogen for full flotation. For pyrite, Fuerstenau et al. (1968) found a window for flotation between pH 3 and pH 10 in the presence of ethyl xanthate. The upper limit of ...
WhatsApp: +86 18221755073
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 presence of Acidithiobacillus ferrooxidans. Pyrite was significantly depressed with these bacteria using the optimum dosage of reagents.
WhatsApp: +86 18221755073
Real ore sample flotation separation tests showed that the mixed depressant can efficiently depress pyrite from galena-pyrite mixed concentrate. The obtained …
WhatsApp: +86 18221755073
Starch and meta bisulphite were used as a depressant for pure pyrite sample and a pyritic copper ore at two different pHs values. pH was 6.5 and 10 in pure pyrite study while it was 6.9 and 12 in ...
WhatsApp: +86 18221755073
In this paper, formation of zinc sulfide species during roasting of ZnO with FeS2 was investigated and its contribution on flotation was illustrated. The evolution process, phase and crystal ...
WhatsApp: +86 18221755073
Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to …
WhatsApp: +86 18221755073
Table II outlines the results from such a reverse 101 50, 48. 46. Zn 44- grade (~) 42- 40- 38- 36- SWith pyrite flotation in 32 0 Without pyrite flotation nitrogenin nitrogen I 301 20 3'0 4'0 5'0 6'0 7 0 Zn recovery (o/%) Fig. 4. Zinc flotation grade vs. recovery with and without the prior nitrogen flotation of pyrite. lO0- air y 7.
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
Application of flotation on a reasonable scale within the gold-mining industry commenced in the early 1930s following the introduction of water-soluble flotation collectors (specifically xanthates and dithiophosphate collectors) that allowed differential flotation of sulfide minerals, followed by the installation of pyrite flotation plants on …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The flowsheet above was designed to treat economically approximately 200 tons in 24 hours of a low-grade dump ore containing lead and zinc values as well as. ... Zinc Flotation. Tailings from the 6 …
WhatsApp: +86 18221755073
ABSTRACT The oxidative flotation separation of chalcopyrite from pyrite in weak alkaline seawater solution was investigated using potassium ferrate (K2FeO4) as the oxidizing reagent. The optimal K2FeO4 concentration of 0.25 kg/t was found to strongly depress pyrite (from 88.05% to 7.92%) but insignificantly influence chalcopyrite …
WhatsApp: +86 18221755073
Various technological schemes [9, 10] of copper ore and copper-zinc ore processing, technological schemes of direct selective flotation and variants of collectively selective schemes have been developed and introduced for refractory pyrite-pyrrhotite-copper-zinc ores of Tarnersky, New Shemursky, Podolsky, Uzelginsky, Safyanovskoye, …
WhatsApp: +86 18221755073
Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine generation in tailings led to an innovative process in which acid-generating pyrite is separated by flotation from the coarse tailings and incorporated into the slime zone. …
WhatsApp: +86 18221755073
Galena–Pyrite Bulk Flotation. The particle size has a significant effect on the flotation behaviors of minerals; therefore, the effect of grinding fineness (−0.074 mm) on galena -pyrite bulk flotation was firstly investigated and the results are shown in Fig. 2a. As can be noted that the recovery of lead, zinc, and sulfur was increased …
WhatsApp: +86 18221755073
We investigated the replacement of NaCN with Acidithiobacillus ferrooxidans, in the flotation of a low-grade lead–zinc ore containing high amounts of pyrite.A. ferrooxidans were adapted to original ore, and its growth curves were monitored before and after adaptation. Because of its characteristics, the addition of original ore …
WhatsApp: +86 18221755073
The more flotation collector you have on, the higher you will need to increase that pH for effective pyrite depression. You also need to insure your pyrite and copper minerals are well liberated for good chemical separation by pH. In froth flotation, depressing pyrite or any metal is impossible if minerals are locked.
WhatsApp: +86 18221755073
The test samples were got from a copper and zinc ore in Liaoning province of northeast China. The main useful elements are copper-zinc sulfide, and the main mineral is chalcopyrite, pyrite and ...
WhatsApp: +86 18221755073
Evaluation of Lead-Zinc Ore Tailings by Flotation . ... It was found that copper ions activate the pyrite flotation due to the formation of copper xanthate and dixanthogen. View.
WhatsApp: +86 18221755073
This molybdenum flotation circuit, based on 250-500 tons per 24 hours is designed for low-grade molybdenum ore having high-grade streaks and with pyrite-quartz gangue.It is also basically sound for many other friable sulphide ores, such as antimony, silver and even some lead ores. The basic ideas stressed in this moly flotation …
WhatsApp: +86 18221755073
As an example of the beneficial effect of copper sulfate in the activation of zinc sphalerite toward flotation, the series of results shown in Fig. 1 is of interest.These represent rougher tests on a sample of heavy pyritic ore. The particular sample in question contained about 5.6% zinc as marmatite; and was treated in a circuit made alkaline with …
WhatsApp: +86 18221755073
DOI: 10.1016/S0301-7516(97)00064-1 Corpus ID: 96276439; Pyrite flotation in the presence of metal ions and sphalerite @article{Zhang1997PyriteFI, title={Pyrite flotation in the presence of metal ions and sphalerite}, author={Q. Zhang and Zhenghe Xu and Volkan Bozkurt and James A. Finch}, journal={International Journal of Mineral Processing}, …
WhatsApp: +86 18221755073
In this study, the flotation behaviors of chalcopyrite and sphalerite in model samples mimicking copper ores with high Cu/Zn ratios (i.e., the ratio of chalcopyrite/sphalerite = 13:1) were investigated with zinc sulfate as a …
WhatsApp: +86 18221755073
and zinc flotation circuit (the Hellyer Project) The Hellyer Project was developed by Aberfoyle Limited and proceeded from discovery in 1983 to production in 6 years.1 The 156 106 t orebody consisted of Þne grained massive sulphide containing copper, lead, zinc and silver minerals with gold in a predominantly pyrite matrix.
WhatsApp: +86 18221755073
Abstract. Various collectors were compared in the selective flotation of copper–zinc ore by using isopropyl ethylthionocarbamate (Z-200), buthl xanthate, …
WhatsApp: +86 18221755073حقوق النشر ©2000- 2024 شركة شنغهاي زينيث
