The production and trade of metals was the foundation economic wealth many regions in world, which makes study ancient metallurgical slags primary importance. This type is relatively new for Bulgaria, where research field started late 1960s with chemical analysis copper ore, slags, tools finished goods from mine Ay-bunar area. Iron one most commonly found elements earth’s crust its deposits are...

The recycling options of spent MgO-C refractories from an electrical arc furnace (EAF) have been evaluated. The economic, quality of spent refractories and products made from it, the ease of implementation of a recycling practice and the interest of steel melt shops were considered. It was decided that the best option of most EAF shops would be to recycle spent MgO-C refractory as a foaming sla...

The article presents the results of research on influence lead production slag environment and ecology city. Due to open storage slags, an excess maximum permissible levels (MPL) was established: near plant, concentration in soil exceeds 3000 mg/kg, while MPL is 3.2 mg/kg. data analyzes obtained by methods scanning electron microscopy X-ray microanalysis, performed a microscope (SEM), as well f...

The work contains the results of analysis technical literature and author’s research on use aluminium slags products their processing in metallurgical production. It has been shown that bulk reagents derived from secondary aluminum production wastes (APWs) are used with increased sodium potassium chloride. This creates some inconvenience for out‑of‑furnace steel treatment due to chloride conten...