Sphalerite that is rejected into the lead flotation tails is then floated in a second flotation step after activation with copper sulphate. The copper ions replace zinc atoms on the sphalerite surface creating a pseudocopper mineral surface coverage on the sphalerite which is then collected using copper flotation type collectors.
Fig. on the separation of sphalerite from pyrite in the presence of sodium sulfite. the best separation of sphalerite from pyrite was obtained in the presence of sodium sulfite. and has been linked to an increase in reactivity between the collector and copper species at the mineral surface ŽShen et al. sphalerite flotation is always lower than ...
Effect of Copper Sulfate on Zinc Sphalerite Flotation View Larger Image 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.
At very low potentials, however, elemental copper is formed, which may worsen the selectivity of the sphalerite flotation. Controlled potential contact angle measurements showed that xanthate adsorption does occur on copper-activated sphalerite at all pH ranges.
Thus an understanding of the sphalerite involves the exchange of zinc for copper ions, effect that iron in sphalerite has on the flotation behav- thus providing a surface receptive towards collector iour of this mineral may allow us to maximise sphalerite adsorption (Finkelstein, 1997).
MECHANISM OF SPHALERITE DEPRESSION IN AN OPEN CU/ZN FLOTATION SEPARATION CIRCUIT *L. Xia1, B. Hart1, ... Tests indicate that sphalerite recovery of the flotation concentrate in the laboratory testing was ... The total rougher copper flotation time was 7.5min.
The flotation of sphalerite has been demonstrated without the use of collectors. The effect of redox potential, pH, and copper-activation have been investigated in tests using samples of pure mineral.
The experimental data on copper-zinc ore flotation have shown that sphalerite and pyrite present at the final process stages of col- lective–selective flotation possess equal kinetics of floatability.
The copper ions replace zinc atoms on the sphalerite surface creating a pseudocopper mineral surface coverage on the sphalerite which is then collected using copper flotation type collectors. Because most of the iron sulphides also report to the lead flotation tails and so feeds the zinc flotation circuit, typically lime is used to raise pH for ...
The micro-flotation test results showed that the recovery and flotation rate of sphalerite with copper sulphate as activator and butyl xanthate as collector were significantly decreased with the ...
The flotation of sphalerite under different conditions… .- transactions Janusz Girczys, Janusz Laskowski and Janusz Lekki Copper activation studies with sphalerite Abstract. Log In Register
Differential flotation ofcopper-zincat PrieskaCopper Mines(Pty) limited: apre-liminaryreport SYNOPSIS ... neutral pHwiththeuseofazinc-cyande sphalerite depressant, followeq byflotation ofthereactivated sphale- ... copper, 3,87% zinc, some 30% ofpyrite and approxi-mately 8g/tAgand0,4g/tAu.
Nov 22, 2018· Lead and Copper Flotation AEROPHINE 3418A promoter is an effective primary collector in the selective flotation of Lead/gold/silver minerals with low copper content. ... silver, and the main metal minerals are galena, sphalerite, chalcopyrite, pyrite, and so on. flotation copper/lead separation priority flotation zinc and pyrite from ...
Jan 27, 2018· Activation of Sphalerite by Ammoniacal Copper Solution in Froth . Feb 15, 2016 2State Key Laboratory of Complex Nonferrous Metal Resources Clean Usually, copper sulphate is used in zinc flotation as an appropriate activator.
Electrochemistry of Copper Activation of Sphalerite and Potassium Isobutyl Xanthate (KIBX) Synthesized Collectors Adsorption 56 Iranian Journal of Chemical Engineering, Vol. 10, No. 4 recovery with hexyl xanthate.
The Problem with separating Copper from Zinc by flotation. The treatment of heavy sulphide ores of copper containing zinc and pyrite is often extremely difficult particularly if soluble copper …
analysis have confirmed that sphalerite was activated by copper(I) from the cuprous cyanide complexes. The recovery of copper(I)-activated sphalerite increased further ... flotation of sphalerite and galena is also studied. The measurements of the pulp
Copper-Lead-Zinc ores The Cu-Pb-Zn separation process is among the most challenging flotation separations primarily because the first step must entail bulk flotation of the two most readily floatable minerals with these two minerals separated in a differential flotation stage.
A Surface Chemistry Study of the Effects of Zinc Sulphate on Sphalerite During Flotation Separation at the Laronde Mine Dennis M. Laliberty The University of Western Ontario Supervisor ... Figure 2-1 Flowsheet of the copper flotation circuit at LaRonde with sample collection
the sphalerite surface but that the copper present on the surface was ... Chalcopyrite and sphalerite flotation experiments were carried out at about 30% and 25.5 ...
The adsorption regularity of copper sulphate on sphalerite surface can be defined by a thermodynamic analysis of sphalerite surface state and behavior of copper sulphate in solution was made. From the results of a complete chemical calculations of the minerals surfaces state, …
However, flotation results (Boulton et al., 2005) have shown that the amount of copper added to achieve maximum sphalerite flotation is very sensitive to solution conditions, with for example Cu(II) acting as an activator or depressant of sphalerite flotation depending on pH and copper concentration.
the most widely used activator in sphalerite flotation. It is generally accepted that the copper activation of sphalerite at acidic condition follows an ion exchange mechanism (Chandra and Gerson,
REACTION" OF METALLIC IRON AND COPPER SOLPEA.~ Dr TF.lE FLOTATION OF SPHA.IERITE. - By-C. w..Am.bler t Jr. INTROOOCTION. Copper sulphate is a COnmlOIl flotation reagent for blende ores. Metal-lie iron is also present in the mill ci:rcuit and a re action between the iron and the salt would be in accord with well known cbem.1stry. ~eabundance 0 f metallic iron in a tlotatioD.
In the flotation of sphalerite, copper sulphate reacts with the surface of sphalerite resulting in increased collector adsorption and improved flotability. Sphalerite is not easily floated by a xanthate because zinc sulphate which would otherwise form is soluble in water and thus wont form hydrophobic film around mineral.
Therefore, the substitution of copper sulphate with ACS would increase the separation efficiency not only in marmatite flotation but also in sphalerite flotation. Journal of Chemistry is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on all aspects of fundamental and applied chemistry.
The activation of sphalerite by some metal salts has been briefly reviewed and the influence of lead nitrate on sphalerite in the presence of potassium ethyl xanthate has been investigated by a combination of batch flotation tests and solution analyses on pulps containing a mixture of sphalerite …
1. Introduction. As the most important minerals of copper and zinc, sphalerite (ZnS) and chalcopyrite (CuFeS 2) always coexist with each other and form Cu-Zn sulfide ores.Most of the Cu-Zn sulfide ore is processed by differential flotation, in which chalcopyrite is floated first before sphalerite.