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Flotation of sphalerite and pyrite in the presence of ...
explanation for the high flotation of pyrite in alkaline pH conditions is its inadvertent activation by copper either dissolved from copper minerals present in the ore or added in the zinc circuit to activate the flotation of sphalerite Bushell and Krauss, 1962; Voigt etŽ al., 1994 .
Zinc Sphalerite Flotation 600 g/t CuSO4 Copper Sulfate ...
Shows the effect of a copper sulphate NEAR OVERdose on zinc flotation. https://
Zinc Sphalerite Flotation + 500 g/t CuSO4 Copper Sulfate ...
Shows the effect of correct copper sulphate dosage on zinc flotation. https://
Improving Flotation of Sphalerite
conducted flotation tests of sphalerite- xanthate system and showed that the flotation of activated sphalerite is suppressed at the pH range of 6 to 9, depending on the amount of CuSO 4 added. They observed, as shown in Figure 6-1, that the larger the addition of copper sulfate, the wider
The effect of mode of occurrence of galena and sphalerite ...
presence of sphalerite in the galena concentrate is also due to poor liberation between galena and sphalerite, especially in the middlings. Hence, selectivity could be improved by regrinding the rougher concentrate prior to the cleaning stage. Keywords: sulphide ores, flotation, flotation …
CANATUAN CU/ZN FLOTATION METALLURGY
Commercial copper production was declared on March 1, 2009, when copper concentrate inventory levels surpassed the 5,000 tonne shipping threshold. Increased zinc levels in the ore body, as it was continuously being mined, prompted the construction of a Cu/Zn separation circuit as extension of the previous flotation circuit.
COPPER MINERALS FLOTATION IN FLOTATION PLANT OF …
UNDERGROUND MINING ENGINEERING 35 (2019) 23-35 UDK 62 UNIVERSITY OF BELGRADE - FACULTY OF MINING AND GEOLOGY ISSN 03542904 Original scientific paper COPPER MINERALS FLOTATION IN FLOTATION PLANT OF THE "RUDNIK" MINE Predrag Lazić1, Đurica Nikšić1, Branislav Miković1, Rudolf Tomanec1 Received: October 23, 2019 Accepted: November 1, 2019 Abstract: A …
FAQS | Solvay
Improved copper and gold selectivity in flash flotation circuits; High selectivity against iron sulfides (e.g., pyrite), unactivated zinc sulfides (e.g. sphalerite) and arsenic minerals (e.g., arsenopyrite). Its unique selectivity may facilitate elimination of the use of sodium cyanide at some operations; Low dosage required; Improved flotation ...
flotation Flashcards | Quizlet
sphalerite (zn) 1. float chalcopyrite with xanthate, at ph>10 so that pyrrhotite does not also float. use soda ash to adjust the pH 2. Activate sphalerite with copper sulphate and float with xanthate at ph>10 to make sure that pyrrhotite is depressed
Collector composition for flotation of activated sphalerite
What is claimed is: 1. A collector composition for froth flotation of metal sulfide minerals comprising the combination of 1 ) at least one allylalkylthionocarbamate compound having the formula ##STR11## wherein R is a C 2 to C 8 alkyl radical, and 2) a xanthate having the formula ##STR12## wherein R'' is a C 2 to C 8 alkyl radical. 2.
1 Froth Flotation – Fundamental Principles
Table 1: Grade/recovery performance of a hypothetical copper ore flotation process. Product % Weight % Cu Assay Feed 100 2.09 Concentrate 10 20.0 Tailings 90 0.1 (a) From Table 1, the Ratio of Concentration can be calculated as F/C = 100/10 = 10. If only assays are available, the ratio of concentration equals (20 – 0.1)/(2.09 – 0.1) = 10 ...
THERMOMECHANICAL ASPECT OF SELECTIVE FLOTATION OF ...
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. This is particularly obvious in zinc flotation cycle, where pyrite is only depressed with lime and blue copperas activates both sphaler-
Reaction of metallic iron and copper sulphate in the ...
Table I. Flotation Tests After. 5~Iinute. Oondit ioning Period Wi. th. Copper Sllphate in the Presence. of. Varying. A.tnounts of'' Iron • • • • • • • • • • 5. Table. II. Flotation Tests After JD-Minute Oonditiaoing Period With Copper Sulphate. in. the Presence of Varying Amol.m:ts of Iron ...
New and improved processes and compositions for use in flotation recovery of metal values from base metal zinc sulfide ores are disclosed. The collector compositions for froth flotation of metal sulfide minerals comprise the combination of combination of 1) at least one allylalkylthionocarbamate compound having the formula ##STR1## wherein R is a C 2 to C 8 alkyl radical, preferably R is an ...
Activation of Sphalerite by Ammoniacal Copper Solution in ...
· The activation of sphalerite particles by ammoniacal copper solution (ACS) was investigated in this study. This microflotation study was conducted on a single sphalerite mineral with the particles size of 38 μ m to 75 μ m. Results showed that ACS has somewhat better activation effect than copper sulphate (a traditional activator) with sodium isobutyl xanthate as the collector.
CHAPTER 7 FLOTATION OF SULPHIDE MINERALS
Flotation of Sphalerite (ZnS) Flotation of sphalerite with amyl xanthate is possible at pH 3.5 and decreases as the pH is ... Then activation of sphalerite with copper sulphate and high pH to depress pyrite enables a sphalerite concentrate to be made. Finally a lowering of pH can
Chalcopyrite (Cu) Sphalerite (Zn) Separation by Flotation
· REGRIND AND SELECTIVE FLOTATION. The bulk copper-zinc concentrate after thickening is reground to all minus 325 mesh. Even at this grind microscopic examination shows inclusions of chalcopyrite in sphalerite grains. Zinc sulphate and cyanide are added to the regrind mill to effectively depress the sphalerite.
Effect of Copper Sulfate on Zinc Sphalerite Flotation
· Copper sulfate, when used as an activator in flotation of sphalerite, forms an invisible but physically detectable film of cupric sulfide on the surface of the sphalerite particles, as evidenced by increased electric conductivity, by chemical metathesis, and by the ability to deactivate with solutions of alkali cyanides, which are known as ...
Role of Flotation Reagents in Tuning Colloidal Forces for ...
· Colloidal interactions between sphalerite and synthesized ZnS (analogous to sphalerite) and between silica and synthesized ZnS in aqueous solutions were studied using direct surface forces zeta potential distribution measurements. The role of flotation reagent including activator, depressant and collector in tuning surface forces was investigated.
Effect of Physisorption of Collector on Activation of ...
· The studies into the mechanism of activation of sphalerite flotation by ions of heavy metals show that neither ion exchange nor electrochemistry explain the experimental facts, namely, activation of flotation of copper mineral by lead ions, activation of sphalerite flotation by zinc, or flotation in the presence of non-conducting surface layer with silver or mercury.
(PDF) Effect of iron content in sphalerite on flotation ...
The chemical composition of the low iron content For example, both an increase and decrease in copper sphalerite sample, ZnS, (Carthage, TN, USA) was activation, collector adsorption and froth flotation of 66.7% Zn, 0.3% Fe and 32.7% S (0.06% Cu and 0.07% Pb) while that of the high iron content sphalerite sam- * ple, (Zn, Fe)S, (Broken Hill ...
(PDF) Floc flotation of galena and sphalerite fines ...
At the given reagent and operating conditions, floc flotation increases the floatability of the galena and sphalerite fines over 30% ~ad 50% in the range of pH 5 to 8, respectively, in comparison to the corresponding conventional flotation. Clearly, floc flotation is an effective means of recovering galena and sphalerite fines.
Critical importance of pH and collector type on the ...
· In the zinc flotation experiments, after pH adjustment, conditioning was performed by adding copper sulphate as sphalerite activator (250 g/ton for 2 …
The Application of Xanthate in Froth Flotation Process ...
· However, after activation of the copper salt activator, the surface of the sphalerite is easily adsorbed by copper ions and becomes floatable, and the low-grade xanthate can be used for flotation. The adsorption product of xanthate on sphalerite is the zinc xanthate adsorption layer. 3. Xanthate Application in Copper Froth Flotation
Electrochemistry of Copper Activation of Sphalerite and ...
the processes of sulphides flotation. The adsorption of potassium isobutyl xanthate (KIBX 3⋅10-3M) on sphalerite has been studied using electrochemical potential, FTIR technique and SEM. Non activated minerals and minerals activated with copper sulfate (10-4 M) and copper nitrate (10-4 M) have been investigated at pH 7.5. Surface species have ...
A review of the fundamental studies of the copper ...
· Flotation without copper activation generally has no effect on pyrite recovery as sphalerite does not combine with xanthate without copper . Using micro-flotation, laboratory batch, and in-plant minicell experiments, Dichmann and Finch  observed similar behaviour during combined flotation of activated pyrite and sphalerite.
Influence of the Interaction between Sphalerite and Pyrite ...
In this paper, the effect of pyrite on the activation of sphalerite was investigated by micro-flotation, copper adsorption experiments, X-ray photoelectron spectroscopy (XPS), and electrochemical measurement. 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 ...
The Complete Collection of Copper Beneficiation Reagents ...
· It is mainly used for the flotation of copper oxide ore, which can be used for directly flotation or sulphidizing flotation. The flotation effect is better than that of xanthates alone. Ester Collectors Ester collectors have the strong collection capacity for chalcopyrite, but weaker collection capacity for sphalerite and pyrite. Xanthate Ester
INTERPRETATION OF FLOTATION DATA FOR THE DESIGN …
characteristics, Hellyer''s sequential flotation circuit versus Cadia''s "simple" copper/gold flotation circuit. They have a common theme in that pyrite forms the principal floatable concentrate diluent. Hellyer ore contains finely disseminated chalcopyrite, sphalerite, galena, and tetrahedrite.
Electrochemical Studies of Copper-Activation of Sphalerite ...
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. However, the contact angles and flotation recovery decrease at near neutral pH.
An XPS Study of Sphalerite Activation by Copper | Langmuir
· When copper-activated sphalerite was conditioned in an air-saturated solution of pH 9.2, the CuS-like activation product is oxidized in preference to unactivated ZnS. The oxidation resulted in a loss of copper from the sphalerite surface, which may be detrimental to flotation.
FROTH FLOTATION : RECENT TRENDS Flotation of Sulphide …
Flotation process, patented in the year 1906, was originally ... depression of sphalerite. Cyanide dissolves surface copper from activated sphalerite and can react with iron and zinc xanthate to form soluble complexes, eliminating xanthates from the surfaces of the .. - -->
Study of Flotation Parameters for Copper Recovery from ...
Intergrowth of pyrite, sphalerite, tennantite and other copper sulphides, difference in their activity and size create the considerable problems in implementation of selective flotation, obtaining conditional copper and zinc concentrates. Despite several of studies that have been done related to this
ROLE OF STARCH AND METABISUPHITE ON PURE PYRITE …
Shen et al. (2001) studied the effect of sodium sulphite on the flotation of sphalerite and pyrite in the presence of copper ions and they reported that sulphite promoted the formation of copper hydroxide on the surface of pyrite leading depression. Yamamoto (1980) proposed that sulphite ions depressed pyrite by
Chapter 7. Depression of sphalerite with cyanide and zinc ...
copper-activated sphalerite is not efficient at lower dosages of zinc sulphate alone. In addition, Trahar et al. (1997) have shown that the use of zinc salts at pH 9 decreased the recovery of galena due to the coating by hydrophilic zinc hydroxide. A study on the deportment of sphalerite in the lead flotation circuit was carried out in the work
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