A double Ore extension is a natural generalization of the Ore extension. We prove that a connected graded double Ore extension of an ArtinSchelter regular algebra is Artin-Schelter regular. Some other basic properties such as the determinant of the DE-data are studied. Using the double Ore extension, we construct 26 families of Artin-Schelter regular algebras of global dimension four in a seque...

The metallurgical properties of blast-furnace ore and ore-coal extrusion briquettes (BREX) based on hematite iron concentrate are studied. With respect to values hot strength brex occupy an intermediate position between sinter pellets. reduction capacity for is significantly reduced with simultaneous addition flux solid fuel, which may be associated a in porosity (due clogging pores the formati...

Zinc and lead are the two most widely used non-ferrous metals after aluminium and copper as vital materials in everyday life. They are mined and smelted in many countries in both the developed and developing world. Both pyrometallurgical as well as hydrometallurgical methods are used for production of lead zinc depending on the type of raw material used as a charge. In the pyrometallurgical pro...

The objective of this study was to evaluate stable Pb isotope signatures as a tracer for Pb contamination in Lake Andong. For Pb isotope analysis, we collected water and sediment from Lake Andong, particles in the air, soils, and stream water, mine tailings, sludge and wastewater from zinc smelting around lake Andong watershed. The results showed that Pb isotope ratios (Pb/Pb, Pb/Pb, and Pb/Pb)...

Acidithiobacillus ferrooxidans strain D3-2, which has a high copper bioleaching activity, was isolated from a low-grade sulfide ore dump in Chile. The amounts of Cu(2+) solubilized from 1% chalcopyrite (CuFeS(2)) concentrate medium (pH 2.5) by A. ferrooxidans strains D3-2, D3-6, and ATCC 23270 and 33020 were 1360, 1080, 650, and 600 mg x l(-1) x 30 d(-1). The iron oxidase activities of D3-2, D3...

Nigeria is richly endowed in convertible natural resources of which solid minerals are a member of the endowments. However, the country is basically a mono-product economy based on its vast oil deposit accounting for over 84% of foreign earnings and 25% of GDP. The triple challenges of the volatile nature of global oil politics, achieving the objectives of the millennium development goals and t...

This research is an air table device design and laboratory scale experimentation. Air a tool to separate valuable minerals from mineral impurities of tin ore based on differences in specific gravity, shape size using air/wind media. The the starts manufacture as well other main components, including; feed hopper, ventilation tertoron cloth. Then next stage calculation selection driving motor fo...

Prolonged development of ore deposits, beneficiation and metallurgical smelting concentrates result in the accumulation wastes, forming large-scale dumps sludge ponds negatively affecting environment human health. The creation introduction industrial waste treatment technologies will make it possible to dispose them with production valuable commercial products improve environmental situation. I...

In this study, two auxiliary collectors (methyl naphthalene and naphthalene) of molybdenite the traditional collector (kerosene) were mixed for flotation, respectively. According to selection analysis collector, it was found that surface energy (γC= 44.50 mJ/m2) polycyclic aromatic hydrocarbons is very close (γS= 42.55 {100} surface. Therefore, can be physically adsorbed onto according principl...