Copper sulphide rich leach residue from nickel refining is a marketable product and may be treated by smelting. In looking for another technology its valorisation, the raw material was characterised suitability of medium-temperature sulphate-based pressure leaching tested this purpose. The contained 58% copper carried in covellite oxides. Using favourable conditions, about two hours needed comp...

Over the past decade, there has been a steady growth in demand for rare metals, with rhenium being one of most highly demanded, but also expensive and difficult to obtain. The high is due its use as key component metallurgical alloys or catalysts used oil refining industry. aggregate facts causes profitability processing rhenium-containing mineral resources, which are copper substandard concent...

Generally, trace precious metals remaining in wastewaters generated from the refining process of precious metals are not recovered, due to a relatively high processing cost as well as various technical problems. Recovery of precious metals from wastewaters is very important for the conservation of resources and the protection of environment. However, wastewaters containing a large amount of amm...

This study site is located at an abandoned factory of mining, smelting, and refining gold copper in north Taiwan for more than one hundred years. The present used soil background investigation out the sequential extraction procedures arsenic to assess reutilization potential brownfields site. upper limit concentration was 300 mg/kg 700 copper. within mainly immobile fraction, such as forms fixe...

The article considers a sorption method for extracting copper ions from model nitric acid solution based on of electrolytic refining silver with using sorbents bis-picolylamine functional groups: Dowex M-4195 and AXIONIT BPA. possibility to residual concentrations in the less than 10 mg/l is shown. working capacity both samples under batch conditions, as well dynamic exchange full ?onditions (c...

A prior investigation by the authors demonstrated that incorporating 25% of copper complex (Cu(NH3)4(NO3)2) into Al/CuO nanothermite enables to produce highly-reactive gas-generating energetic composites for emerging micro-airbag applications. To further improve decomposition gaseous species (N2, O2, N2O), during thermite reaction, we employed ball milling technique diminish its grain size down...

this study sougth to the effect of occ pulp fractionation on produced paper strength properties improvement. using a pressure screen, occ pulp was devided to tow distinct fractions of accept ratio (short fibers) and reject ratio (long fibers) in accordance with optimum condition of fractionation based on the previous studies. in the next stage, long fiber stream was refined and recombined with ...