The recovery of fine hematite particles from banded hematite quartzite (BHQ) ore with potato starch has been investigated using selective flocculation. Microscopic features, coupled with x-ray diffraction (XRD), and Fourier transforms infrared (FTIR) spectroscopic data provide evidences for adsorption of starch molecules on hematite surface. The starch molecules show good selectivity for hemati...

N. Asaloș, Ovidius University, Faculty of Economics, Constanța, Romania; E. Hlaciuc, Stefan cel Mare University, Doctoral School of Economy, Suceava, Romania; I. Bostan, Stefan cel Mare University, Doctoral School of Economy, Suceava, Romania; T. Roman, Al. I. Cuza University, Faculty of Economics and Business Administration, Iasi, Romania; D. Mateș, West University, Doctoral School of Economy,...

Earlier we reported, in this journal, that the pits generated in CR-39 detectors during Pd/D co-deposition experiments are consistent with those observed for pits that are of a nuclear origin. Recently, that interpretation has been challenged. In this communication, additional experimental data and further analysis of our earlier results are provided that support our original conclusions. PACS....

This study tests the hypothesis of Cretaceous Turn Geological Evolution (CTGE). It uses large dataset on mineral deposits NE Asia compiled by US Survey in collaboration with Russian, Mongolian, Korean, and Japanese geological institutions. As predicted, Triassic–Early Jurassic Late Cretaceous–Paleogene geodynamic activities were simple, producing a relatively small amount (94 132, respectively)...

Esta artigo dascrava a inffu6ncia do uso da farramentas da taste na melhoria da qualidada do software dasanvolvido na OSLOG SOi::..fv\fARE, SA Dascreve Se aquj todo o procasso dasde a selacl;;:do das farramantas necassarias ate sos rasultados da sue utilizagAo, passando pela montagam do ambients, cuidados a tar a vantagens da sua uttlizao. Durante todo esta prooasso foram ragistados alguns vs(o...

milligram. As representatives in the British Empire "of the Radium Beige (Union Miniere du Haut Katanga), we would like to have an opportunity of correcting this statement. Previous to the discovery of the rich ores in the Belgian Congo, the standard price for radium element was $110 per milligram, and this price was reduced following the production of radium from the Congo ore to $70, equivale...

Sulfur oxides are produced from the burning of fossil fuels, mainly coal and oil, and the smelting of metal ores that contain sulfur. Emissions of sulfur oxides cause serious impacts on human health and the environment, both directly and as a result of the way they react with other substances in the air. Sulfur oxides are main precursors of atmospheric acidification, aerosol generation, and aci...

Two biodegradable quaternary ammonium salts were synthesized and used as cationic collectors in processing iron ores by froth flotation. The flotation behaviors of iron minerals with the new biodegradable quaternary ammonium collectors were investigated by micro-flotation tests of quartz (SiO2) and magnetite (Fe3O4). It was observed that the new biodegradable collectors were effective in separa...

The synergetic utilization of ferruginous gibbsite ores (Al-Fe ores) and manganese (Mn-Fe by the carbothermic co-reduction roasting–magnetic separation process was proposed as an innovative green for recovery valuable metal elements Mn, Fe Al from these ores. In this paper, a ferromanganese crude alloy with 72.47% 10.19% Mn high 85.89% prepared, which produces acceptable feed to produce steels ...

Technological procedure of extracting metals is being constantly modernised so that polluting of the basic life resources is reduced. Emissions of waste gases and particulate matter are still present in larger mining-metallurgical complexes. Mining-metallurgical complex Bor (RTB) exploits sulphide copper ores, thus emitting acid sulphur gases and suspended particles with high content of Cu, Zn,...