(PDF) Copper partitioning between silicate melts and …
insight into magma evolution leading to porphyry copper ore formation Ying-Jui Hsu, Zoltan Zajacz, Peter Ulmer, Christoph A. Heinrich PII: S0009-2541(16)30622-2
insight into magma evolution leading to porphyry copper ore formation Ying-Jui Hsu, Zoltan Zajacz, Peter Ulmer, Christoph A. Heinrich PII: S0009-2541(16)30622-2
A 5-factor, 2- and 3-level experimental design was employed to determine the effect of copper (35 and 45 g/l), sulphuric acid (160 and 180 g/l), iron (1, 3, and 6 g/l), polyacrylamide additive (2, 5, and 10 mg/l), and temperature (45 and 55 °C) on electrolyte density, conductivity, and the diffusion coefficient in synthetic copper ...
Drawdown angle of a crushed copper ore tested at 1% and 5% moisture in a slice 2D model of a flat bottom bin. 4.5 Wall friction and chute angle Wall friction tests should be performed on different types of wall liners to determine the minimum angle for mass flow. The coefficient of friction is also required for
What are mining tailings' main chemical, mineralogical, physical, and geotechnical properties, and what potential applications can be assessed based on these properties? To address this question, this literature review focused on these properties as observed in a wide range of tailings. It was identified that these materials are predominantly sandy silts composed …
Precise prediction of ore grade is essential in feasibility studies, mine planning, open-pit and underground optimization, and ore grade control. Conventional methods, such as geometric and geostatistical methods, are the most popular techniques for mineral resource estimation but fail to capture the complexity of orebodies. Due to this limitation, grades are …
Porphyry copper deposits are the world's most important source of Cu, supplying over two thirds of the total Cu production (Sillitoe, 2010).They are typically associated with subduction-related magmatism at convergent plate margins (Sillitoe, 1972, Richards, 2003).Ore metals are transported by magmas from the mantle wedge to the upper crust, and …
The copper ore grading curve is concave and conforms to a B-type particle structure . In this type of granular material, the skeleton position of coarse particles is relatively fixed, and the migration of fine particles easily leads to pore blockage. ... The permeability coefficients of ore columns a and b in group A were smaller than those ...
Fig. 2 (b) shows the Pearson correlation coefficients between the reflectance spectra of ores and the ore grades, and the Pearson correlation coefficients are all negative. From Fig. 2 (b), it can be seen that the Cu content of the ore is negatively correlated with the reflectance spectrum of the ore, and the maximum negative correlation ...
... compensation price and price coefficient are shown in Table 2, which corresponds to the grade of copper concentrate obtained from the Huogeqi Copper Mine. The transaction price is...
Copper (Cu) ore is a naturally occurring mineral deposit that contains copper in varying concentrations. It is an important industrial metal that has been used by human civilizations for thousands of years due to its excellent electrical and thermal conductivity, high ductility, and resistance to corrosion. Copper is widely used in various applications, including …
A typical copper ore-grade in open-pit mines is 0.5% and 1% or 2% in underground mines [43]. To extract the valuable metal, the processing route depends upon the …
The exploitation of low-grade copper resources is critical due to the significant demand for copper and its scarcity in China. 1,2,3 Low-grade oxidized copper ore with high alkaline gangue content, referred to as LCOHAG, is predominantly found in Central Africa, notably Zambia and the DRC, 4,5 and in southern China. 6 This ore consists mainly of oxides, …
C.M. Ai et al., Accelerating leaching of copper ore with surfactant and the analysis of reaction kinetics 275 main contact form. The spreading ability of lixivium can be expressed by the spreading coefficient S: S =− −σσ σsg sl lg (1) where S is the spreading coefficient and σsl, σsg, and σlg are the solid–liquid, solid–gas, and gas–liquid interfacial tension
The permeability of the ore column is constantly evolving during the leaching process. Before ore leaching, there was little difference among permeability coefficients for ore …
Therefore, the range of copper grades in the feed was also chosen as independent variables for its study. The regression coefficients were obtained from a study experiment for the copper ore at the end of the process. Regarding metallurgical recovery, this was assumed in 90% according to what was declared by the company.
This article calculates the copper content of resources in each stage by searching different copper content coefficients. All copper refers to pure copper. Table 1. Percentage of copper in unit product. Copper industry chain ... Because the trade relations of copper ore and blister copper are mainly concentrated between exporting countries with ...
Correlation between specific energy coefficient (E sp) and hardness of test materials in copper-ore slurries Coriolis wear test condition: 15 gal/min flow rate and 1.2 slurry S.G. The size, shape and (size) distribution of solids particles are some of the major factors to determine the abrasivity of a slurry and the final wear on a test ...
The genesis of the largest deposits is favoured by various factors, including long-lived magmatic-hydrothermal activity, high concentrations of "ore ingredients" (i.e., copper and sulphur) in ...
However, recent studies on the timing of sulfide saturation have shown that most magmas from porphyry copper deposits became sulfide saturated before the ore formation—including the two mega-deposits of El Teniente and Rio Blanco porphyry copper deposits—which suggests that sulfide saturation is a second-order control for ore formation ...
Metals requiring analysis at a copper-gold mine do not just include copper (Cu) and gold (Au). Silver (Ag) is often present at significant levels, while related elements may also require measurements, such as iron (Fe) and …
Copper ore samples were prepared for analysis via a proprietary . sample preparation procedure, which resulted in solutions ... All calibrations have correlation coefficients of 0.999 or better. An independent calibration verification solution (30 mg/L Cu) was run every 12 samples, and calibrations were redone after
Sulfide ores such as chalcopyrite ((CuFeS_2)) are converted to copper by a different method from silicate, carbonate or sulfate ores. Chalcopyrite (also known as copper …
Mining plants require various samples of the metals extracted from ore to be routinely analyzed, including the feed (crushed ore), the tails (waste ore left over after processing) and the concentrate (the final product). Metals requiring analysis at a copper-gold mine do not just include copper (Cu) and gold (Au). Silver (Ag) is often present ...
A bulk sample of copper ore was obtained from the Sungun copper complex treating a porphyry copper-molybdenite deposit which is located in the geographical coordination of 43′ 46° east and 42′ 38° north in the East Azerbaijan Province. ... The correlation coefficient (R 2) of the derived model is 76.6%. With additional of variables A, G, ...
The partition coefficients derived from measured values (Table 6; 32-380) and from a mass balance (Table 6; 11-28.2) for copper are generally consistent with natural fluid inclusions in felsic ...
where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. The value of μ s is generally higher than the value of μ k for a given combination of materials.. Coefficients of friction between materials are best determined through testing. However, it is possible to find tables in the literature for friction coefficients between various materials.
Peru is the second-largest producer and exporter of copper in the world. This paper proposes a novel approach to assess short-run and long-run effects of copper on Peru's recent economic growth. Annual data over the 2014–2018 period were used to calculate a Mining Contribution Index (MCI). An institutional quality indicator of the World Competitiveness Index …
Note that pyrite accounts for 0.68% of the mineral, whereas chalcocite/digenite/covellite account for 0.42% and chalcopyrite/bornite 0.08%. Data on the mineralogical composition of copper oxide ...
The analysis revealed a weak correlation in the SLR model with a correlation coefficient of 0.47, while the MLR model showed varying correlation coefficients, ranging from 0.94 (MLR with interaction, abbreviated as MLRI) to 0.53 (MLR without interaction) due to the combination and interaction of selected elements. ... for copper ore XRF sorting ...
This chapter estimates copper ore grade using different models. The first part (Part A) investigates the performance of ELM for predicting ore grades. The latitude, longitude, and altitude were used as inputs. ... Using standard deviation, correlation coefficient, and CRMSD, Taylor diagrams evaluate the accuracy of models. The model with the ...
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