chalcocite flotation amp iron

The separation of chalcopyrite and chalcocite from pyrite ...

Apr 01, 2014· Chalcocite recovery was 42.8% in 8 min flotation, which is much lower than that in the single chalcocite flotation. Pyrite recovery was 24.8%. With the collector addition, chalcocite recovery was increased significantly to 78% at 120 g/t collector and …

Collectorless flotation of Chalcocite by controlling redox ...

Using microflotation method, this study explored the collectorless flotation of Chalcocite and its dependence on the redox potential of pulp . Electrochemical studies were performed by cyclic voltammetry in specific potential ranges and at different pH values. The results show that significant floatability of Chalcocite occurs in the specific reducing conditions.

The Effect of Regrinding Chemistry and Particle Breakage ...

The separation of chalcopyrite and chalcocite from pyrite in cleaner flotation after regrinding. Minerals Engineering 58: 64-72. Chen, X., Seaman, D., Peng, Y. and Bradshaw, D., 2014. Importance of oxidation during regrinding of rougher flotation concentrates with …

Chalcocite - an overview | ScienceDirect Topics

The separation of chalcocite (Cu 2 S) and heazlewoodite (Ni 3 S 2) from high nickel matte can be achieved by maintaining the proper pH and pulp potential while using xanthates as collectors.The flotation recovery of Cu 2 S and Ni 3 S 2 has been studied by adjusting the oxidation–reduction potential of the flotation pulp with (NH 4) 2 S 2 O 8 and KMnO 4.The recovery of Ni 3 S 2 is almost zero ...

Mining Industry | Copper Sulfide Ore and Flotation Process ...

1 Types of copper sulfide ore (1) Single copper mineral Its ore characteristic is relatively simple, and the only useful component that can be recycled is copper. The gangue minerals are mainly quartz, carbonate and silicate. (2) Copper-sulfur ore Called copper-bearing pyrite. In addition to copper minerals, iron sulfide can be recovered, and the main mineral of sulfur is pyrite.

Chalcocite: Mineral information, data and localities.

ID Species Reference Link Year Locality Pressure (GPa) Temp (K) 0000864: Chalcocite: Tomeoka K, Ohmasa M (1982) The modulated structure of cubic Cu9BiS6 the alpha phase American Mineralogist 67 360-372 1982: 0: 293: 0006938: Chalcocite: Will G, Hinze E, Abdelrahman A R M (2002) Crystal structure analysis and refinement of digenite, Cu1.8S, in the temperature range 20 to 500 C under …

A Novel Mineral Flotation Process UsingThiobacillus ...

Oxidative leaching of metals by Thiobacillus ferrooxidans has proven useful in mineral processing. Here, we report on a new use for T. ferrooxidans, in which bacterial adhesion is used to remove pyrite from mixtures of sulfide minerals during flotation. Under control conditions, the floatabilities of five sulfide minerals tested (pyrite, chalcocite, molybdenite, millerite, and galena) ranged ...

Chloride leaching of silver and lead from a solid residue ...

Table 3. Mineralogical composition of flotation copper concentrate and feed for chloride leaching Material unit Bornite Cu 5 FeS 4 Chalcocite Digenite Cu 2 S/Cu 1.8 S Chalco-pyrite CuFeS 2 Pyrite Markasite FeS 2 Covellite CuS Sphalerite ZnS Tennantite Cu 12 As 4 S 13 Galena PbS Copper concentrate % mass 10.99 5.96 12.05 5.03 0.61 1.48 0.81 3.06 ...

flotation of chalcopyrite from cobalt - iron ore mining

Oct 24, 2012· If the cobalt is found with chalcopyrite, bulk flotation can be carried out with xanthate at pH 10, and … Copper extraction techniques – Wikipedia, the free encyclopedia … using froth flotation. A typical concentrate of chalcocite can grade between 37% and 40% copper in sulfide, making them relatively cheap to smelt compared to ...

Pyrrhotite: The mineral pyrrhotite information and pictures

The variation of iron in Pyrrhotite's structure is also responsible for more than one crystal symmetry type, allowing it to form in both hexagonal and monoclinic symmetries. Multiple crystal symmetries should technically classify Pyrrhotite as a mineral group rather than a single mineral, but a sub-classification is rarely made due to polytypes appearing similar and perhaps even combined ...

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Copper extraction - Wikipedia

Copper extraction refers to the methods used to obtain copper from its ores.The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.. As in all mining operations, the ore must usually be beneficiated (concentrated).

An electrochemical study of depression of flotation of ...

Feb 10, 1981· J. Electroanal. Chem., 118 (1981) 317--326 317 Elsevier Sequoia S.A., Lausanne -- Printed in The Netherlands AN ELECTROCHEMICAL STUDY OF DEPRESSION OF FLOTATION OF CHALCOCITE BY CYANIDE AND IRON-CYANIDE COMPLEXES S. CASTRO and J. LARRONDO Department of Metallurgical Engineering, University of Concepcion, Chile ABSTRACT The depression of chalcocite flotation …

INVESTIGATION OF EFFECTIVE PARAMETERS FOR …

2. Flotation of middling particles (i.e. higher than 200 µm) improves with increased pH. This is true in the case when chalcocite is the major copper mineral. In the case of chalcopyrite ore, a lower pH is more desirable (i.e. 8.5–9.5) because at a higher pH, the flotation of chalcopyrite is decreased, especially for the coarser particles.

Platinum-Palladium ores

The actual PGMs are generally associated with all these minerals. These ores often have very high talc content which significantly impacts flotation. Maximizing PGM recovery requires flotation of all sulphide mineralization which is often done at natural pH of 8-9 to avoid depressing the PGM containing iron …

Success Of Floatation In Copper Tailings

The flotation of gold and copper floatation machine is a rock gold treatment method widely used in gold concentrator. It is often used to treat gold containing ores in highly floatation sulphide minerals, which can maximize gold enrichment to sulfide mineral tailings.

Chalcocite - an overview | ScienceDirect Topics

The following phases may exist in the system: Chalcocite, Cu 2 S: The approximate composition of chalcocite is Cu 2 S. At 103.5±1.5 °C α-Cu 2 S changes to the high temperature form β-Cu 2 S with the sulphur atoms in close hexagonal arrangement. β-chalcocite exists in the composition range from Cu 2 S up to approximately Cu 1.988 S at 105 °C but the size of the range decreases with ...

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

In the presence of cyanide and the absence of iron, chalcocite is depressed only with very high additions of cyanide. Flotation of Pyrite (FeS 2) The species of xanthate responsible for the flotation of pyrite in the presence of short chained xanthates is dixanthogen (X 2) – a dimer of xanthate. Dixanthogen is an electrically neutral dimer.

Copper Processing | Equipment, Process Flow, Cases - JXSC ...

Flotation law of copper sulfide minerals (1) All iron-free copper minerals, such as chalcocite and covellite, are similar in floatability, and cyanide and lime have weaker inhibitory effects on them. (2) All copper minerals containing iron, such as chalcopyrite and bornite, are susceptible to inhibition by cyanide and lime in alkaline media.

Magnetic Separation of Sulphide Minerals

Amp. New Cornelia, Arizona Mag- netic at 0,5 Amp. CD netic at 1.4 Amp. 2. I 1.6 55.1 5.2 26.1 9.9 The 270 to 400-mesh fraction of the con- centrate from the New Cornelia mill was fractionated at 0.6, at 0.85, and at 1.4 amp., and the fractions were briquetted and counted with the results shown in …

Influence of Ferric and Ferrous Iron on Chemical and ...

iron had an important role in controlling the precipitation and nucleation of jarosite (Equation (2)). 3 42 3426. 3Fe X 2HSO 6H O XFe SO OH 8H (2) The effect of ferric and ferrous iron on the extraction of copper and iron from flotation concentrates including both primary and secondary copper sulfides has not been well studied as yet.

XA04N0873 - OSTI.GOV

predominantly chalcocite to predominantly chalcopyrite. The former is the easiest and the latter the most difficult copper mineral to dissolve. In conventional dump leaching, the solution used is a dilute sulfuric acid containing iron sulfates. After passage through the dump, the copper is

copper flotation and dewatering

copper flotation and dewatering. KYF Air Inflation Flotation Cell Rougher Flotation Cell . KYF air inflation floatation cell has U tank floatation cell and column flotation cell which is composed of impeller stator main shaft bearing body air adjusting valve and tank body as picture shown ..

Fundamentals for optimization of cyanide processes in ...

Values for Kf (flotation) and Kd (depression of flotation) are given for butyl xanthate. They are ten times higher, if ethyl xanthate is used. The value of the product [Me(OH)+][X-] at the boundary condition for the complete depression of copper and iron sulphides in the presence of cyanide ions is lower by a factor of 3 compared with its value ...

Centenary of Flotation Symposium - Nanoparticle

Iron Phosphate Potash Coal Silicate Minerals 39.3 2.2 5.6 0.8 133.4 4.8 7.4 0.5 1.4 0.5 19.0 6.4 10.9 2.8 3.7 2.5 ... Richardson and Walker showed that the flotation of chalcocite, bornite, chalcopyrite and pyrite with potassium ethyl xanthate is controlled by the conditioning potential, similar to