Copper, gold, and silver artefacts, together with evidence of metallurgical activities, have been retrieved from Late Neolithic strata in several settlements Greek Eastern Macedonia. Recent excavations at Dikili Tash revealed that gold was further used paints for the decoration pottery. It appears area’s inhabitants had a great familiarity different metals distinct stages production-elaboration...

This paper examines the copper recycling chain - from scrap generation through to metallurgical recovery in search for current challenges and technological opportunities improvement. We provide an analysis of global flows, showing largely constant amounts recycled a rise importance complex end-of-life (EoL) compared less challenging manufacturing scrap. Source separation EoL as answer waste com...

The current research on metallurgical remains from scientific excavations in northeast Yunnan the Bronze Age period is insufficient. In order to study smelting technology of north-eastern Yunnan, samples slag and mineral excavated Yubei Di site Dongchuan were examined. Based outcome characterization analysis, a simulation was executed utilizing software Factsage 7.1 generate phase diagram that ...

Studies on determination of five heavy metals, i.e. copper (Cu), cadmium (Cd), chromium (Cr), lead (Pb) and nickel (Ni) in water samples collected from drains located outside five factories using sodium sulfide precipitation and aluminium sulphate inorganic coagulation followed by FAAS detection were carried out. The amount of coagulant added, effect of centrifugation time and analysis methods ...

The vacuum brazing of dissimilar Al 7075 and Al–25 Si alloy was investigated. filler copper foil with a thickness 20 μm, the temperature 560 °C held for 10 min. average shear strength brazed joint 26.4 MPa. layer found to be dissolved completely, interface had an irregular shape serrated border, indicating good metallurgical bonding between two alloys. However, factors which might cause deterio...

Studies that investigate the environmental health risks to Cairo residents invariably conclude that lead is one of the area's major health hazards. The Cairo Air Improvement Project (CAIP), which was implemented by a team led by Chemonics International, funded by USAID in partnership with the Egyptian Environmental Affairs Agency (EEAA), started developing a lead emission inventory for the grea...

With the number of easily accessible ores depleting, alternate primary and secondary sources are required to meet increasing demand economically important metals. Whilst highly abundant, these materials lower grade with respect traditional ores, thus selective sustainable metal extraction technologies needed reduce processing costs. Here, we investigated leaching potential biogenic ammonia prod...

The estimation of metallurgical parameters of flotation process from froth visual features is the ultimate goal of a machine vision based control system. In this study, a batch flotation system was operated under different process conditions and metallurgical parameters and froth image data were determined simultaneously. Algorithms have been developed for measuring textural and physical froth ...

To attempt to optimize the anomalous phenomena that today go under the label "cold fusion" the experimentalist should be aware of the many aspects of the behavior of hydrogen in metals and of its entry into and egress from metals. This paper discusses the equilibrium characteristics of the isotopes of hydrogen in metals. The first section discusses the thermodynamics of the terminal solutions o...

has to be expanded further to provide for a study of evolution and formation of Indian languages in the Indian language union (sprachbund). The paper analyses the stages in the evolution of early writing systems which began with the evolution of counting in the ancient Near East. Providing an example from the Indian Hieroglyphs used in Indus Script as a writing system, a stage anterior to the s...