Egypt has no domestic silver ore sources and is rarely found in the Egyptian archaeological record until Middle Bronze Age. Bracelets tomb of queen Hetepheres I, mother pyramid builder king Khufu (date reign c. 2589–2566 BC), form largest most famous collection artefacts from early Egypt, but they have not been analysed for decades. We samples Museum Fine Arts, Boston using bulk XRF, micro-XRF,...

background: anecdotal information has suggested that sodium benzoate is used with more than permissible doses during production steps of food products especially pickles and pickled cucumbers in food producing factories in markazi province and other food producing factories . the present study was done to evaluate factual concentration of sodium benzoate in these products. methods: in this stud...

During the passage of atmospheric precipitates through porous dump body, products oxidation sulfide minerals are dissolved. As a result, underspoil waters with low pH values and significant amount dissolved metals formed. For most part, all types sewage produced by mining processing enterprises (underspoil, colliery, pit, drainage) combined before treatment, which leads to formation common wate...

The use of geometallurgical modelling is becoming common in the design a concentrator plant and during its operational phase. Predictive aims to define optimized process parameters for accommodate variability ore feed characteristics. main objective this study simulate metallurgical response distinct unit types their blends using kinetic models derived from experimental flotation tests. Kinetic...

A striking characteristic of Japanese factories is the extent of process control: from both the technical and the social viewpoint the labour and production system is controlled down to the very last detail. The characteristics of management and organization which underlie this are closely interwoven with Japanese culture. This explains why the work content. working conditions and working relat...

This article studies copper (Cu)-based composites alloyed with nickel (Ni) and reinforced carbon nanotubes (CNTs) fabricated via powder metallurgy under pressureless sintering methodology vacuum. Different compositions of matrices containing 0, 3, 30 wt% Ni are compared after at 550 750 °C. The formation phases for the different is analyzed by high-temperature X-ray diffraction (HT-XRD) in soli...

A lot of metallurgical processes take places in shaft furnaces, where reacting gas carrying powders flows up in packed bed of descending metallurgical materials. Gas + powder two phase flow in fixed packed bed has been investigated by author for many years 1 . At present author undertakes the investigations with moving bed. Physical model with glass bed and glass powders was constructed. The ex...