scholarly journals Mineralogical Prediction on the Flotation Behavior of Copper and Molybdenum Minerals from Blended Cu–Mo Ores in Seawater

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 869
Author(s):  
Yoshiyuki Tanaka ◽  
Hajime Miki ◽  
Gde Pandhe Wisnu Suyantara ◽  
Yuji Aoki ◽  
Tsuyoshi Hirajima
Keyword(s):  
Mining Operation ◽  
Mineral Particle ◽  
Flotation Kinetics ◽  
Copper Oxidation ◽  
Oxidation Degree ◽  
Copper Ore ◽  
Flotation Rate ◽  
Rate Analysis ◽  
Liberation Analysis ◽  
Flotation Behavior

The copper ore in Chilean copper porphyry deposits is often associated with molybdenum minerals. This copper–molybdenum (Cu–Mo) sulfide ore is generally mined from various locations in the mining site; thus, the mineral composition, oxidation degree, mineral particle size, and grade vary. Therefore, in the mining operation, it is common to blend the ores mined from various spots and then process them using flotation. In this study, the floatability of five types of Cu–Mo ores and the blending of these ores in seawater was investigated. The oxidation degree of these Cu–Mo ores was evaluated, and the correlation between flotation recovery and oxidation degree is presented. Furthermore, the flotation kinetics of each Cu–Mo ore were calculated based on a mineralogical analysis using mineral liberation analysis (MLA). A mineralogical prediction model was proposed to estimate the flotation behavior of blended Cu–Mo ore as a function of the flotation behavior of each Cu–Mo ore. The flotation results show that the recovery of copper and molybdenum decreased with the increasing copper oxidization degree. In addition, the recovery of blended ore can be predicted via the flotation rate equation, using the maximum recovery (Rmax) and flotation rate coefficient (k) determined from the flotation rate analysis of each ore before blending. It was found that Rmax and k of the respective minerals slightly decreased with increasing the degree of copper oxidation. Moreover, Rmax varied greatly depending on the mineral species. The total copper and molybdenum recovery were strongly affected by the degree of copper oxidation as the mineral fraction in the ore varied greatly depending upon the degree of oxidation.

Influence of particle size on copper recovery from sulfide ore by the moderately thermophilic microorganisms

2019 ◽  
Vol 116 (1) ◽  
pp. 119
Author(s):  
Wen-bo Zhou ◽  
Kai Li ◽  
Yu-guang Wang ◽  
Li-juan Zhang ◽  
Hai-na Cheng ◽  
...  
Keyword(s):  
Particle Size ◽  
Xrd Analysis ◽  
Microbial Interactions ◽  
Copper Recovery ◽  
Mineral Particle ◽  
Copper Ore ◽  
Thermophilic Microorganisms ◽  
Moderately Thermophilic ◽  
Before And After ◽  
Leaching Condition

The bioleaching of copper ore by the defined moderately thermophilic consortium containing Leptospirillum ferriphilum and Acidithiobacillus caldus was carried out in the bench-scale column. Bioleaching experiments showed that the leaching rate was 25% higher than that of a conventional leaching and the acid consumption was reduced by 33% at the optimal leaching condition. Meanwhile, the effect of different particle sizes on the rate of the copper leaching was also investigated, and it was shown that the particle size affects the bioleaching rate significantly in the range of 5–25 mm, in which approximately 89.27% of copper was extracted at 5–10 mm, while only 57.08% at 15–25 mm. The results obtained by X-ray diffraction (XRD) analysis of the mineral samples before and after microbial and chemical leaching revealed that the decrease in particle size of the minerals resulted in an enhancement of complex microbial interactions. Especially for the particle size of 5–10 mm, a significant amount of elemental sulfur and jarosite formed on the surface of the mineral, while it was further confirmed that critical microbe-mineral interactions have taken place on the mineral surface. The results indicated that mineral particle size is an integral factor to improve the copper recovery from ore in heap leaching operation. This will provide a reference to the heap construction for the bioleaching.

scholarly journals Effects of Xanthate on Flotation Kinetics of Chalcopyrite and Talc

Minerals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 369 ◽  
Author(s):  
Limei Bai ◽  
Jie Liu ◽  
Yuexin Han ◽  
Kai Jiang ◽  
Wenqing Zhao
Keyword(s):  
Physical Adsorption ◽  
Particle Morphology ◽  
Flotation Kinetics ◽  
Flotation Rate ◽  
Force Microscopy ◽  
Atomic Force ◽  
Angle Measuring ◽  
Particle Size Analyzer ◽  
Underlying Causes ◽  
Kinetics Of

This paper investigated the effects of using or not using potassium butyl xanthate (PBX) as a collector on the flotation kinetics of talc and chalcopyrite. By means of atomic force microscopy (AFM), Fourier-transform infrared spectroscopy (FTIR), a contact angle measuring instrument and particle size analyzer, the underlying causes behind the flotation rate changes of talc and chalcopyrite are analyzed. Experimental results showed that in collectorless flotation, the law of change in the flotation rate constant (k) of the two minerals over time is independent of pH, and k values of chalcopyrite are much smaller than those of talc. In the presence of PBX, the flotation speed of chalcopyrite greatly increases, and the k values of chalcopyrite are far larger than those of talc. This is mainly because the amount of xanthate adsorbed on the surface of chalcopyrite is large and the adsorption is in the form of chemisorption, while the adsorption of xanthate on the talcum surface is in very small amounts and in the form of physical adsorption. Simulation results indicated that the collectorless flotation of chalcopyrite conform to the classical first-order kinetics model and the Kelsall model, whereas that of talc only conform to the latter, which is due to the layered structure of talc. In the presence of the collector, talc flotation conforms to the two model, because talc has a higher floatability and particle morphology has less influence on the flotation rate.

scholarly journals Effects of Pyrite Texture on Flotation Performance of Copper Sulfide Ores

Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1218
Author(s):  
İlkay B. Can ◽  
Seda Özçelik ◽  
Zafir Ekmekçi
Keyword(s):  
Copper Sulfide ◽  
Surface Cleaning ◽  
Copper Recovery ◽  
Sulfide Ores ◽  
Copper Ore ◽  
Ore Deposit ◽  
Framboidal Pyrite ◽  
Process Plant ◽  
Flotation Performance ◽  
Flotation Behavior

Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance. Two copper ore samples (Ore A and Ore B) having different textural/modal mineralogy and flotation characteristics were taken from different zones of the same ore deposit. Ore B contained framboidal pyrite and altered pyrite/marcasite, which is considered the main reason for the low flotation performance in both copper and pyrite flotation sections of the process plant. Flotation tests were conducted under different conditions using the two ore samples and a 50:50 blend. The results showed that Ore A could be concentrated under the base conditions, as applied in the existing flotation plant. On the other hand, Ore B did not respond to the base conditions and a copper recovery of only 5% could be obtained. Besides, blending Ore B with Ore A negatively affected the flotation behavior of Ore A. An alternative flotation chemistry was applied on Ore B using Na2S for surface cleaning and Na-Metabisulfite (MBS) for pyrite depression in the copper flotation stage. The surface cleaning reduced the rate of oxidation of the framboidal pyrite in Ore B. As a result, the copper recovery could be increased to 52% Cu for Ore B, and 65% for the mixed ore sample.

Flotation Research on Cuprite-Type Oxide Copper in XinJiang

2012 ◽  
Vol 524-527 ◽  
pp. 987-992 ◽  
Author(s):  
Kun Xiong ◽  
Shu Ming Wen ◽  
Gui Shan Zheng ◽  
Shao Jun Bai ◽  
Hai Ying Shen
Keyword(s):  
Low Grade ◽  
X Ray Diffraction ◽  
Copper Oxidation ◽  
Copper Ore ◽  
Element Analysis ◽  
X Ray ◽  
Optimum Parameters ◽  
Concentrate Grade ◽  
The Many ◽  
Multi Element Analysis

Low-grade oxide copper ore is an important resource, reserves of which are scattered all over the world. In the present study, the characteristics of oxide copper ore are studied using multi-element analysis and X-ray diffraction. The oxide copper minerals in the ore are mainly in the form of cuprite, malachite, chrysocollite and azurite. The effects of grinding fineness and agent regulation on flotation are also investigated. Floatability was unsatisfactory because of the many kinds of oxide copper minerals present in the sample. The flotation results indicate that a concentrate grade of 18.32% at 73.46% recovery can be obtained using the closed circuit process of one-stage roughing, three-stage scavenging and two-stage cleaning flotation under the optimum parameters, with raw ore characteristics of 1.29% Cu, 92.25% copper oxidation rate, and 65.59% slime content.

Kinetics of ion flotation of Co(II)–EDTA complexes from aqueous solutions

2015 ◽  
Vol 103 (9) ◽  
Author(s):  
Mohamed A. Soliman ◽  
Ghada M. Rashad ◽  
Mamdoh R. Mahmoud
Keyword(s):  
Aqueous Solutions ◽  
Cetylpyridinium Chloride ◽  
Optimum Conditions ◽  
Flotation Kinetics ◽  
Flow Rates ◽  
Flotation Rate ◽  
Ion Flotation ◽  
Ph Values ◽  
Edta Complexes ◽  
Kinetics Of

AbstractThe flotation kinetics of Co(II)-EDTA complexes from aqueous solutions using cetylpyridinium chloride (CPyCl) is studied and discussed in the present work. The effects of many variables on the ultimate recovery and the flotation rate are investigated. The data obtained from solutions of different pH values showed that Co(II)-EDTA complexes are successfully floated at pH 7.8. While at pH 3.4 and 11.2, both the ultimate recovery and the flotation rate are dependent on the concentration of CPyCl. Flotation of Co(II)-EDTA at different air flow rates, CPyCl concentrations and ionic strength showed that the ultimate recovery and the flotation rate are markedly affected. The other parameters (cobalt, EDTA and ethanol concentrations) had no effect on the ultimate recovery, while significantly affected the flotation rate. At the optimum conditions (Co(II) : EDTA = 1:1; CPyCl : Co(II) = 4:1; pH7.8;

Divided Loyalties: Immigrant Padrones and the Evolution of Industrial Paternalism in North America

1998 ◽  
Vol 53 ◽  
pp. 49-68 ◽  
Author(s):  
Gunther Peck
Keyword(s):  
North America ◽  
Mining Operation ◽  
Open Pit Mine ◽  
Open Pit ◽  
Open Pit Mining ◽  
Copper Extraction ◽  
Low Grade ◽  
Copper Ore ◽  
New Man

When industrialist John D. Rockefeller visited the new open-pit mining operation of his competitor, Daniel J. Guggenheim, in Bingham Canyon, Utah, in 1910, he declared with genuine envy and admiration,“it's the greatest industrial sight in the whole world.” What most impressed Rockefeller were the massive steam shovels that had revolutionized the process of copper extraction by enabling firms to mine and smelt tons of previously worthless low-grade copper ore. Equally impressive was the fact that, where skilled American miners had very recently toiled underground in search of rich veins of copper, unskilled immigrants now worked aboveground, loading tons of newly blasted copper ore onto train cars. Rockefeller was not alone in expressing wonder at this new man-made marvel. Hundreds of sight-seeing tourists also traveled to the mine by train each week to experience the thrill of industrial America's newfound ability to move mountains. Like Rockefeller, they saw nothing but progress and modernity in the great open-pit mine.

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