dissertation prepared by Francis Dakubo, Sustainable Mining-Solving The Problem Of Chalcopyrite Treatment/Processing- Leaching, Solvent Extraction & Flotation and recommend that it be accepted as fulfilling the dissertation

Chalcopyrite ore from Rakha Concentr ator has been used as the feed material to. study the response of the bulk material and the size fractions constituting the

The main useful mineral in the ore is chalcopyrite and the main gangue minerals are talc and serpentine. To eliminate the adverse effect of talc on flotation of chalcopyrite, a frother MIBC was added to remove a talc slime before flotation of chalcopyrite. However, some copper minerals also float into the talc slime. Thus, selective

Oct 04, 2018 Chalcopyrite Flotation without Collector – Surface Chemistry. It has been reported that chalcopyrite can be floated selectively from an ore containing pyrite, sphalerite, and silicious gangue minerals without using a collector. Sodium sulfide was used as a promoter, presumably to clean the chalcopyrite surface of its hydrophilic oxidation

The Copper Concentrator at Mount Isa Mines Limited treats on average 18 000 tonnes/day of chalcopyrite ore containing typically three per cent copper. The main gangue minerals are iron sulphides (-13 per cent) and non sulphide gangue (-78 per cent). In August, 1991, the comminution flowsheet was changed from a conventional circuit (crusher/rod mill/two stage

Jan 01, 2018 The flotation response of chalcopyrite and molybdenite in the presence of copper ions was investigated through single mineral flotation tests and flotation separation tests. The influence mechanism was studied by adsorption experiments, zeta-potential measurements, and X-ray photoelectron spectroscopy (XPS) analysis

flotation tailings and can be readily recovered by flotation with different flotation reagents. When amyl xanthate is used, 85% of chalcopyrite can be recovered with a copper grade of 14.5% in a single-stage froth flotation. The chalcopyrite flotation concentrate can be sent back to chloride leaching circuits

The effects of H 2 O 2 on the flotation separation of chalcopyrite and pyrite in seawater were investigated. Pyrite was more significantly oxidized by 0.05 vol% H 2 O 2 in seawater at pH 8, as compared to that of chalcopyrite. Under optimized condition, a recovery difference of greater than 70% was obtained for chalcopyrite and pyrite

E ect of pH on Pulp Potential and Sulphide Mineral Flotation ... The electrodes were platinum, gold, chalcopyrite, pyrite and galena. In solution, potentials were linearly dependent on pH with a di erent slope for each electrode. Chalcopyrite, pyrite, sphalerite and galena minerals flotation tests were performed in a microflotation cell

Significance of grinding media wear and its effect on chalcopyrite flotation are discussed. Laboratory marked ball wear tests were conducted grinding chalcopyrite ore and quartzite dry, wet, and with collector added during grinding. The effects of oxygen and nitrogen on ball wear were evaluated by the addition of chalcopyrite mineral while grinding quartzite. The effect of

Finally in chapter 3, the dissertation exams alternative water source for the flotation of chalcopyrite. Mineral flotation is a water-intensive process in mining. In order to sustain mining operations such flotation, which rely heavily on water, chapter 3 of the dissertation looks at using alternative water sources (in this case reclaimed

Dec 07, 2021 Sodium metabisulfite (MBS) was used in this study for selective flotation of chalcopyrite and molybdenite. Microflotation tests of single and mixed minerals were performed to assess the floatability of chalcopyrite and molybdenite. The results of microflotation of single minerals showed that MBS treatment significantly depressed the floatability of chalcopyrite

Jun 26, 2020 Part of large-scale industrial test results of milling fineness influence on lead, copper and zinc minerals flotation results in the Rudnik flotation plant are shown in this paper. Based on industrial research it has been concluded that one-stage milling and two-stage classification of complex Pb-Zn-Cu ore leads to so-called “differential milling”. Namely, galena

The flotation reagent consumptions are minimum. The majority of chalcopyrite remains in the sulfur flotation tailings and can be readily recovered by flotation with different flotation reagents. When amyl xanthate is used, 85% of chalcopyrite can be recovered with a copper grade of 14.5% in a single-stage froth flotation

3.1 Effects of NaOH and lime on flotation behavior of chalcopyrite and pyrite During mineral flotation, H 2 SO 4 is generally used as an acidic pH regulator, and NaOH or lime as an alkaline pH regulator. The current study examines the effects of NaOH and lime on the flotation behavior of chalcopyrite and pyrite. In the flotation test, SBX with

dixanthogen on the mineral surface is the mechanism of the flotation of chalcopyrite using xanthate [1]. Plenty of test methods have been applied to figure out the impact of

Grinding media have significant influence on the flotation of chalcopyrite and pyrite. This effect is mainly related to the change in the surface properties of chalcopyrite and pyrite. This paper investigates the influence of steel ball and nano-ceramic ball grinding on the floatability of chalcopyrite and pyrite. Flotation results, as well-scanning electron microscopy (SEM), X-ray

Sep 23, 2019 The chalcopyrite-molybdenite (Cu-Mo) flotation industry is increasingly turning to organic depressants as suitable replacements for inorganic reagents such as NaHS due to environmental and safety concerns as well as high consumption rates of the inorganic reagents. An opportunity arises for improving, designing and synthesizing new alternative reagents

Jun 06, 2012 Water in Mining 2012: 3rd International Congress on Water Management in the Mining Industry, Santiago, Chile, 6-8 June 2012 Pages: 600-609 ... Water quality had no effect on the collectorless flotation of chalcopyrite which was very strong, in excess of 96% copper recovery, but all three lower quality waters had a detrimental effect on the

May 03, 2017 Sodium silicate was somewhat effective in causing a differential or selective flotation of copper, as chalcopyrite from pyrite by keeping pyrite from floating. Sodium hydroxide and sodium sulfide gave, in most cases, a distinct separation of sphalerite from chalcopyrite; i.e., a high copper and low zinc by suppressing the flotation of

In this paper, the effect of sodium alginate (SA) on the flotation separation of molybdenite (MoS2) from chalcopyrite using kerosene as collector was systematically investigated. The results of single-mineral micro-flotation tests indicated that SA exhibited strong depression on chalcopyrite flotation while it imposed no impact on the floatability of molybdenite

Jul 10, 2020 The flotation circuit separates the valuable minerals from the rest of the crushed rocks. With the addition of reagents, the valuable minerals, mostly in the form of sulphide minerals chalcopyrite and bornite, are separated by flotation and are collected and upgraded to

Activating flotation of chalcopyrite using CuSO4 and H2O2. flotation of cyanide chalcopyrite was depressed. It is considered that, CuSO 4 and H 2 O 2 can improve the flotation of cyanide chalcopyrite by eleminating CuCN from its surface and increasing the concentration of S by 57.02% and 37.48%, respectively

Copper Smelting Chemistry Tutorial - AUS-e-TUTE. Example: Extraction of Copper From Chalcopyrite (CuFeS 2) Mining : digging or blasting to obtain the copper ore from the surrounding rock Crushing : mined copper ore is crushed into very small pieces ; Grinding : crushed copper ore is ground into a powder; Concentrating by flotation (also known as froth

Mar 18, 2021 The recoveries of chalcopyrite and magnesium silicate minerals as a function of the pH obtained using single-mineral flotation tests were shown in

Apr 03, 2018 Preparation of the chalcopyrite ore was designed to produce a flotation feed with the same characteristics as those of the actual flotation feed at the Cyprus Bagdad mill. The ore sample was crushed with laboratory jaw and roll crushers to below 2,000- m size

Jul 09, 2019 The most commonly used collector for flotation chalcopyrite is xanthate, chalcopyrite is easy emerged in a wide pH range (3 to 12). Chalcopyrite is susceptible to inhibition by cyanide and oxidants in the alkaline pulp. Excess lime and sodium sulfide and ammonium sulfide inhibit chalcopyrite in alkaline slurries

Jan 01, 2012 Valuable mineral in an ore such as chalcopyrite ore can be separated from each other and from worthless gauge minerals by the froth flotation process. The process was developed in Australia at the start of the 20 th Century to treat the primary sulfidic silver/lead/zinc ore at Broken Hill (Woods and Doyle, 2000)

Nov 27, 2020 The flotation recovery of chalcopyrite and arsenopyrite in concentrate and tailings after flotation of mixed minerals are shown in Table 2. It can be seen from Table 2 that the flotation recovery of chalcopyrite in concentrate products is about 71%, while the flotation recovery of arsenopyrite is less than 29%. Compared with the results of single mineral

Apr 01, 2021 Mineral grinding and flotation. Flotation tests were conducted to evaluate the flotation behaviour of chalcopyrite under the various conditions, unoxidised (without H 2 O 2 treatment), oxidised, iron-contaminated and sulphidised

flotation were determined to achieve the maximum grade and recovery of chalcopyrite and the effect of activated pyrite on the chalcopyrite flotation efficiency was investigated. 2. Materials and methods The experiments were performed on copper ore obtained from Sarcheshmeh Copper mine, Kerman, Iran

Developments in Flotation Flotation of Nickel Sul\de Minerals Collectorless Wotation It is known that chalcopyrite and pyrrhotite can be Soated without collectors at electrode potentials of #400 mV and #50 mV respectively, and pyrite does not Soat even at #700 mV. The underlying mechanism causing hy-drophobicity, although obscure, is attributed to sur