This work proposes an environmentally safe and economically feasible method of waste copper-nickel production slag utilization (Kola Mining-Metallurgical Company, Nornickel, Kola Peninsula, Russia). process involves the decomposition by diluted solutions sulfuric acid (7–10 wt.% H2SO4) with a transfer in solution more than 70% silicon, 77% iron 78% magnesium, concentration non-ferrous metals re...

This paper uses data on the world’s copper mining industry to measure the impact on e¢ ciency of the adoption of the ISO 14001 environmental standard. Anecdotal and case study literature suggests that …rms are motivated to adopt this standard so as to achieve greater e¢ ciency through changes in operating procedures and processes. Using plant level panel data from 19922007 on most of the world’...

This paper reviews the advantages of substituting die-cast copper for aluminum in the motor rotor. This advance in motor technology has been long sought by the motor industry but short die life due to the high melting point of copper frustrated attempts to manufacture by pressure die casting. The nickel-base alloy hot die technology developed to solve the manufacturing problem is briefly review...

Prediction of accurate values for insertion loss (S21) on printed circuit boards has become ever more critical to SI modeling as signal speeds required for next-generation networking equipment move into the 10+ GHz range. Existing industry-standard insertion loss estimation techniques assume that the copper conductors (PCB traces) are smooth, when in fact they are not. The error thus induced is...

A dispersive liquid–liquid microextraction based on solidification of floating organic drop for simultaneous extraction of trace amounts of nickel, cobalt and copper followed by their determination with electrothermal atomic absorption spectrometry was developed. 300 μL of acetone and 1-undecanol was injected into an aqueous sample containing diethyldithiocarbamate complexes of metal ions. For ...