The processing of fine dust from copper smelters in Kazakhstan is an urgent task. The currently used technology of hydrometallurgical dust processing, which involves leaching with sulfuric acid to produce lead cake and a solution containing copper and zinc, fails meet modern requirements. The significant content of arsenic in the dust (up to 15%) hinders the production …
The Tiemurt Pb-Zn-Cu deposit is situated in the southern margin of the Chinese Altay Orogen (Fig. 2).It was first discovered in 1987 with contained metals of 0.29 Mt Pb + Zn and 0.14 Mt Cu (Wan et al., 2010a).Some geological and geochemical characteristics of primary VMS mineralization are preserved at Tiemurt, but the major Pb-Zn-Cu mineralization is adjacent to …
Cu-Zn brasses, like many industrial alloys, are based on solid solutions of a base metal, here the FCC Cu. In the equilibrium phase diagram 8, the Cu-Zn solid solution covers a wide composition ...
The Tiemurt Pb-Zn-Cu deposit (metal reserve: 0.29 Mt (Pb + Zn) and 0.14 Mt Cu) is hosted in the Kangbutiebao Formation volcanic-sedimentary rocks in the Chinese Altay Orogen, NW China. Although some geological and geochemical characteristics of primary seafloor sedimentary mineralization are preserved, major fault-controlled Pb-Zn-Cu orebodies ...
The ball model illustrates the dynamic Zn ad-O x /CuZn/Cu(111) interface region emerging in H 2 /CO 2 /CO, arrows indicate the Zn alloying occurring in the Zn ad-O x /CuZn/Cu(111) interface region ...
Bi-plots of Cu, Zn, and Pb isotopic compositions indicated that tires can be clearly discriminated from natural-origin and other non-exhaust traffic emission sources. The multi-isotope signatures of Cu, Zn, and Pb exhibited different isotopic values for other non-exhaust traffic emission sources than for tires, and application of the multi ...
The Morococha district in central Peru is characterised by economically important Cordilleran polymetallic (Zn-Pb-Ag-Cu) vein and replacement bodies and the large Toromocho porphyry Cu-Mo deposit in its centre. U-Pb, Re-Os, and 40Ar/39Ar geochronology data for various porphyry-related hydrothermal mineralisation styles record a 3.5-Ma multi-stage history of …
The range for concentration of Cu, Zn, Pb, and Cd was 2.34–25.26, 43.9–71.3 µg/g, which is too low to be detected by the analytical techniques and 0.2–1., respectively. Concentration of Cu, Zn, and Pb were lower than those found in our study and concentration of Cd was higher than the concentration obtained in our study.
We recently developed Cu-Zn alloy wetting layer for the SAC solder balls to improve the reliability. In this paper, IMC formation and solder joint reliability have been investigated in the solder joint between SAC solder balls and Cu-Zn alloy pads, and Cu pads were also used as a reference. Sn-4.0Ag-0.5Cu solder balls were used and the substrates were Cu and 80 wt%Cu-20 wt%Zn …
In the alloy materials, their mechanical properties mightly rely on the compositions and concentrations of chemical elements. Therefore, looking for the optimum elemental concentration and composition is still a critical issue to design high-performance alloy materials. Traditional alloy designing method via "trial and error" or domain experts' experiences is barely …
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The remediation of dredged marine sediments contaminated by metals has drawn increasing attention globally. Immobilization was regarded as a promising method for reducing adverse impacts on marine ecosystems. In this study, kaolinite and limestone were used as amendments to immobilize Zn, Pb, and Cu in dredged marine sediments, which were collected …
Herein, rice straw-derived biochar-supported nanoscale zero-valent iron (nZVI@BC) composite was prepared and characterized, and its remediation performance in …
Formation/growth behaviour, phase stability, and mechanical properties of interfacial Cu 6 Sn 5 intermetallics influenced by micro-alloying in Pb-free solder joints, are of ongoing interest as this phase is crucial to the service reliability of solder joints.Our recent work has demonstrated that, after reflow, the homogeneously located micro-alloying elements of …
In addition, the BCR sequential extraction procedure revealed that speciation shiftsof heavy metals are the root cause for the reduction of leaching concentrations; after ball milling of 4 h, the primary components of Pb, Cu and Zn in the soil were relatively stable (F 2 + F 3) and residual fraction (F 4), which accounted for 76.75%, 67.06% and ...
Sn-Zn solder system has been vigorously researched in the development of a low-cost Pb-free solder alloy. As shown in phase diagram (Figure 1), the Sn phase has tielines with the Cu6Sn5, Cu-Zn and ...
The giant Cu-Pb-Zn polymetallic Baiyangping deposit in the northern Lanping Basin shows pronounced zoning of Cu-rich orebodies related to deeper reverse faults and Zn-Pb orebodies related to shallower strike-slip faults. The fluid inclusions in the Cu-rich stage show temperatures of 210–300 °C, salinities as low as 4 wt% NaCl equiv., and Na ...
25 mm media when the particle size is less than 250 μm regardless of the ore type (Fe and Cu-Zn-Pb), the Bond Index (12 and 23 kWh/t) and Millpebs' proportion (20 per cent and 100 per …
In the present research, ball milling was utilized to remediate soil contaminated by Pb, Cu, and Zn and the influence of milling time on immobilization effectiveness was also investigated. The …
After ball milling, the leaching concentrations of Pb, Cu, and Zn were reduced to 0.027 mg L − 1, 0.59 mg L − 1, and 0.16 mg L − 1, respectively, and their pH-dependent …
Semantic Scholar extracted view of "Immobilization of Pb, Cu and Zn in contaminated soil using ball milling technique." by W. Yuan et al.
Here, we propose a "composition-oriented" method combined machine learning to design the Cu–Zn alloys with the high strengths, high ductility, and low friction coefficient. The method of separate training for each attribute label is used to study the effects of elemental concentrations on the mechanical properties of Cu–Zn alloys.
The Pusangguo deposit (1.42 Mt @ 1.42% Cu, 0.14 Mt @ 1.82% Zn, 0.08 Mt @ 1.01% Pb, and 285.8 t Co @ 140 g/t Co) is the first Co-rich Cu-Zn-Pb skarn deposit discovered in the Gangdese metallogenic belt. However, the trace and minor element geochemistry of the sulfides in this deposit has not been studied, limiting further understanding of elements' …
The influence of different pH conditions and simulated inter-root environmental solutions on the release behavior of heavy metals (Cu, Pb, and Zn) from contaminated soils was investigated. The results indicate that heavy metal leaching from the soil is more likely to occur under acidic conditions and there is a risk of sustained presence of heavy metals in the inter …