A Process Mineralogy Approach to the Flotation of Complex …
The flotation flowsheet includes floating lead minerals at the first step while minimizing the recovery of zinc minerals (lead flotation circuit) and then floating the …
Depression of pyrite in the flotation of high pyrite low-grade lead
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.
Beneficiation of Lead-Zinc Ores – A Review | Request PDF
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 Depression
Pyrite floats at very low pH or gets entrapped during flotation. Column flotation will give good results for such problems. It has forth washing system where entrapped minerals are separated, to get very clean concentrate. 4 years of R&D in RDM proved to reduce silica from 7 to 3% in Zinc cleaning in column with very low pyrite.
Sodium Metabisulfite MBS for pH Control and Pyrite Depression in Flotation
Sodium Metabisulfite aka MBS is used for pH control in froth flotation to control Pyrite depression. Below is a graph showing pH VS pyrite recovery at various collector addition rates. It is also used to prevent flotation of sphalerite by copper activation in the presence of Tennantite/Covellite in the ore. For pyrite flotation, you see maximum ...
Promising energy-storage applications by flotation of graphite …
Sodium carbonate aqueous solution shows weak alkalinity, pH value between 8 and 10. In separating lead–zinc sulfide ore using priority flotation, galena inhibits sphalerite and pyrite when pulp pH adjustment between 8 and 10. Using sodium carbonate instead of lime can keep the pulp's pH stable and avoid the inhibition of Ca 2+ on lead ...
Flotation Behavior of Complex Sulfide Ores in the Presence of
In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS 2 ) from sphalerite (ZnS) and pyrite (FeS 2 ) using sodium isopropyl xanthate as a collector and 4-methyl-2-pentanol (MIBC) as a frother. Flotation tests were carried out in a D12-Denver flotation …
How to Process Low-Grade Lead Zinc Ore by Flotation
How to Process Low-Grade Lead Zinc Ore by Flotation. 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 some silver in both sulphide and oxide form. Due to varying specific gravities of the values, gravity concentration in …
Cyanide chemistry and its effect on mineral flotation
Conclusions. Cyanide has been used to improve the selectivity in the flotation of base metal sulphide minerals. Iron, copper and zinc sulphides can be depressed by free cyanide when xanthate is used as collector. The mechanisms underlying the depression effect on pyrite flotation may be attributed to the formation of insoluble hydrophilic iron ...
The depression of pyrite in selective flotation by different reagent
The depression of pyrite flotation by polysaccharides is due to the selective adsorption of polysaccharides polymers on pyrite surface. Bulut et al. (2011) investigated the depression effect of starch on pyrite flotation and found that starch was effective at a low dosage (1.7 mg L −1) and more pronounced at alkaline pH (10) than natural pH ...
The depression of pyrite in selective flotation by different reagent
Introduction. Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, gold as well as coal (Wang and Forssberg, 1991, Wang, 1995, Dimitrijevic et al., 1996, Jiang et al., 1998).Pyrite has very low economic significance and is usually removed from the …
The Effect of Tetrathionate Ions on the Surface Chemistry and Flotation
In plant practice, the flotation of a copper–lead–zinc ore is carried out in two stages. The first stage entails the bulk flotation of chalcopyrite and galena minerals from pyrite and sphalerite at pH 6.5–7.5, a pH favorable for the existence of tetrathionates (Bulatovic Citation 2007 ).
(PDF) Pyrite Flotation: A Review
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.
Beneficiation of Copper, Lead and Zinc Concentrates From Complex Ore …
This paper reports the results of flotation tests conducted with a copper-lead-zinc sulphide ore. The major sulphide minerals in the ore are chalcopyrite, galena, sphalerite, marmatite and pyrite ...
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 …
Mineralogy and Innovative Flash Flotation Separation of Cu-Pb …
Pyrite in complex metallic ore is a widely distributed sulfide on earth, commonly associated with copper, lead, and zinc sulfides, as well as gold and silver [1,2].The production of separate concentrates from ores containing economic amounts of copper, lead, and zinc is complicated [], especially for ores with high pyrite content …
A New Approach to Selectively Reject Naturally Hydrophobic
Critical importance of pH and collector type on the flotation of sphalerite and galena from a low-grade lead–zinc ore. Article Open access 04 February ... of organic carbon separation from copper ore by pre-flotation. Physicochemical Problems of Mineral Processing 49(1):189–201. ... of chalcopyrite from pyrite in cleaner flotation. Miner ...
Application and depression mechanism of sodium sulfite on …
Abstract Galena, sphalerite, and pyrite are important metallic sulfide minerals and are often associated with one another. In the flotation separation of galena-pyrite …
Sulfidation mechanism of ZnO roasted with pyrite
The sulfidation mechanism of ZnO with pyrite was detailedly studied by thermodynamic calculation and roasting experiments. The …
Silver Gold Recovery Flotation Process
Flotation follows ordinary standard methods, modified as may be necessary to bring up the precious metals in the concentrates where they will be of most value. Thus, in a lead-zinc ore, silver is more valuable in the lead than in the zinc concentrate. Similarly, in a copper or lead ore carrying gold associated with pyrite, it might be ...
Effect of Gangue Minerals on Pulp Rheology and …
The pulp rheology is an important factor affecting flotation performance. Gangue minerals have a significant impact on the rheological property of smithsonite (ZnCO3). The complex pulp rheology (high …
Depression of lead-activated sphalerite by pyrite via galvanic
A typical complex sulfide ore contains sphalerite (ZnS), chalcopyrite (CuFeS 2), galena (PbS), pyrite (FeS 2), and barite (BaSO 4), and its selective flotation involves the recovery of sphalerite by surface modification using an 'activator' such as copper sulfate (CuSO 4) to form CuS-like surface compounds as explained in Eq. (1) (Wills and ...
Mineralogy and Innovative Flash Flotation Separation of Cu-Pb …
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 ...
Evaluation of lead zinc ore tailings by flotation
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 ...
Application and depression mechanism of sodium sulfite on galena-pyrite
In this study, Na 2 SO 3 and lime were used as pyrite depressants for the flotation separation of the lead and zinc ore. The influence of Na 2 SO 3 on pre-adsorbed EX was investigated through micro-flotation experiments, contact angle measurements, ultraviolet–visible spectroscopy (UV–Vis), and time of flight secondary ion mass …
BENEFITS OF HIGH INTENSITY FLOT ATION AT THE …
carbonaceous pyrite and talc in ore. This would normally decrease concentrate grade for a given recovery; however at the same time the concentrator has been required to increase ... lead flotation, zinc primary flotation, ultra fine milling, zinc ultra fine flotation Burgess et al (2003). Figure 3 shows the concentrator flowsheet at Century.
Effect of Copper Sulfate on Zinc Sphalerite Flotation
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 ...
CHAPTER 7 FLOTATION OF SULPHIDE MINERALS
Flotation is affected about one pH unit lower if CaO is used for raising pH compared with KOH or K2CO3. The pzc for pyrite is at pH = 6.9. Above pH 6.9 the surface of the pyrite is negatively charged and Ca2+ adsorbs readily by electrostatic attraction and this hinders the oxidation reaction on the pyrite surface. 2.
Depression of pyrite in the flotation of high pyrite low-grade lead
1. Introduction The beneficiation of complex base-metal sulfide ores is generally based on the selective production of zinc, lead, and copper concentrates from …