Hydrophobic Nature of Ultrafine Chalcopyrite. The ultrafine chalcopyrite from the nearly pure chalcopyrite specimen showed significant natural hydrophobicity as shown in figure 4. With no KAX, over three-quarters of the chalcopyrite floated. Virtually all of the 20- by 10-µm chalcopyrite was recovered in the flotation concentrate. For the 10
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.
Vo1. 2, No.1 Characterization and Flotation of Sulfur from Chalcopyrite Concentrate Leaching 7 A sodium silicate dosage of 50 g/t increases the sulfur grade of the concentrate to 89% with a recovery of 91%. The grade of both copper and siliceous material has
One rejects primarily monoclinic pyrrhotite that is magnetic. After a secondary FLOTATION OF CHALCOPYRITE, PENTLANDITE, PYRRHOTITE ORES 1 1 magnetic separation and regrinding to liberate most of the chalcopyrite and pentlandite, a two stage flotation separation is done to produce a "copper- nickel concentrate" before the pyrrhotite is rejected
greater effect on the chalcopyrite flotation than the other parameters. The recovery and grade of chalcopyrite and pyrite were obtained as 79.95%, 49% and 5.3%, 7.98% using the Aero 407, respectively. Under the optimum conditions, the grade of final concentrate increased from 0.94% to 21.3% with three cleaner stages.
The main objective of this study is to improve the basic understanding of electrochemical bioleaching as an advanced hydrometallurgical process suitable for the treatment of high grade complex sulfide ores and to use this understanding for analyzing the potential of this process for copper recovery from high grade chalcopyrite ores and flotation concentrates.
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 sphalerite.
Hydrogen peroxide (H 2 O 2) has been used as an oxidizing agent in the selective flotation of chalcopyrite and molybdenite.However, this method required relatively high concentration of H 2 O 2 to deliver flotation results (i.e., mineral grades and recoveries) comparable to those obtained by the conventional copper-molybdenum (Cu-Mo) ores flotation using sodium hydrosulfide (NaHS).
A bulk flotation process followed by a reverse flotation where copper was depressed and lead was floated from the bulk concentrate also produced separate concentrates, but at lower efficiency than the sequential circuit. Both processes require the use of cyanide, but the bulk flotation process with copper reverse required very high doses of
In this study, the differences between the separation of chalcopyrite and chalcocite from pyrite in cleaner flotation after regrinding were investigated. In the rougher flotation prior to regrinding, high chalcopyrite and chalcocite recovery were obtained in conjunction with high pyrite flotation recovery due to the activation of pyrite by
permanganate (equivalent to 0.5 lb/ton concentrate, 100 percent reagent basis), a 55 percent flotation, corresponding to 45 percent copper sulfide de-pression, being obtained. This initial depression becomes less effective at higher concentrations and up to 500 mg (6. 0 lb/ton) of oxidant. Above this
This time, 32% of the copper was leached from chalcopyrite ore, with 68% being lost to residues. In flotation, 79% of the 68% unleached copper was recovered as concentrate, with 14% being lost to tailings. When flotation of unleached ore yielded the same recovery to concentrate (79%), 21% of the copper was lost to tailings.
2019-01-15· In fresh water, chalcopyrite recovery and pyrite recovery were about 81.9% and 16.8%, respectively, and the Cu grade of the concentrate was 16.3% at the completion of 10 min flotation. The low pyrite recovery obtained in fresh water reflects that pyrite was not effectively activated by copper ions originating from chalcopyrite at pH 8.5. When
Flotation tests using bulk Cu-Mo concentrate showed that H2O2 could deliver a flotation result comparable to conventional Cu-Mo flotation using NaHS. AB The selective flotation of chalcopyrite (CuFeS2) and molybdenite (MoS2) was studied using surface oxidation treatments (i.e., ozone (O3) and hydrogen peroxide (H2O2)). The results indicated
The selective flotation of chalcopyrite (CuFeS 2) and molybdenite (MoS 2) was studied using surface oxidation treatments (i.e., ozone (O 3) and hydrogen peroxide (H 2 O 2)).The results indicated that the oxidation treatments had different effects on the wettability of chalcopyrite and molybdenite.
In this study, chalcopyrite flotation was performed with different types of water which are tap water, recycling water, tailing dam water (TDW) and acid mine drainage (AMD) in order to investigate
A Mongolian chalcopyrite flotation concentrate was leached using sodium hypochlorite adjusted to different pH using hydrochloric acid. It was found that using a starting pH of below 5.0 resulted
subsequently lowers the overall chalcopyrite recovery and grade (Xu et al., 1995; Peng et al., 2003). For improved mineral liberation due to changes in ore mineralogy in order to increase flotation recovery and grade of the final concentrate (Gaudin, 1939; Sutherland 1989), regrinding to very fine particle size is performed. However, Ye et al.
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. Keywords: Elemental sulfur, sodium silicate, dispersant, depressant.
The size of the coalition of chalcopyrite and pyrite is some coarse. While the particle size of the monomer is fine, the qualified tailing is separated by bulk flotation, then the mixed concentrate of pyrite and chalcopyrite will be regrained and separated. Condition: The collector of chalcopyrite is xanthate or black catching agent.
The bulk rougher concentrate was upgraded in a cleaner circuit to reject the non-sulphide gangue and then the resulting sulphide concentrate was separated by depressing the pyrite to produce two products (copper and pyrite concentrates, both having significant amounts of gold). A standard test with a sequential circuit was applied to the same ore for comparison. The chalcopyrite and pyrite
Pyrite is a major gangue mineral associated with galena and other valuable minerals, and it is necessary to selectively remove pyrite to upgrade the lead concentrate by froth flotation.
Chalcopyrite Flotation Chalcopyrite. Chalcopyrite flotation flowopper sulfide flotation mineral processing the above flowsheet is designed for the treatment by flotation of copper as chalcopyrite with gold and silver valueshe ore, ranging from 60-65 silica, with pyrite, arsenopyrite, and et price.
Vo1. 2, No.1 Characteriza tion and Flotation of Sulfur from Chalcopyrite Concentrate Leaching 7 A sodium silicate dosage of 50 g/t inc reases the sulfur grade of the concentrate to 89% with a
: A Review on Novel Techniques for Chalcopyrite Ore Processing . predomin ant copper mineral. Hydrometallurgical methods are used in countries having readily available deposits with low copper content with sulphur of oxidized form at the same time (USA, Chile, Australia and Peru) (Majima et al. 1985). Hydrometallurgical processing of chalcopyrite
4. The Separation of Chalcopyrite and Galenite. Normally, the separation of this type of ore is to get the mixed concentrate of chalcopyrite and galenite at first, then removing the flotation agent, and using preferential flotation to get concentrate of galenite or chalcopyrite at last. 5. The Separation of Sphalerite and Pyrite
Using a commercial chalcopyrite-rich flotation concentrate and pure natural pyrite samples from an Iranian copper mining complex as well as mixed cultures of moderately thermophilic microorganisms
xanthate are involved in chalcopyrite flotation, it would be expected that chalcopyrite is as sensitive to cyanide additions as pyrite is. 3. Sulphide as depressant Very stable cupric sulphide (CuS) will occur due to chemisorption of sulphide ions. Oxidation potential of
Depression of pyrite in porphyry copper flotation Ian Wark Research Institute Australian Research Council Special Research Centre For Particle and Material Interfaces M. Zanin and S. Farrokhpay Case Study. High pyrite recovery in Cu/Mo operation 4800 tph d80 = 150 µm Polishing Mills FINAL TAIL SCAVENGER FINAL CON CLEANER COLUMNS FEED ROUGHER 2.0 % Cp Ball Mills 1.6 % Py