New bottom-injection configurations for converters with a hybrid gas supply

Configurations for bottom injection in a converter are considered. The proposed configurations are employed in industrial tests.     

Pressure leaching of leucoxene concentrate using Ca(OH)<Subscript>2</Subscript>

The results of studying the desiliconization of a leucoxene concentrate using burned lime as a reagent in the presence of NaOH as a catalyst are presented. This process is based on the selective interaction of CaO with the fine silica present in leucoxene grains, which results in the formation of CaSiO₃ at high temperatures and pressures (autoclave process). Experiments are performed on the initial leucoxene concentrate and the products of its beneficiation after magnetizing roasting.     

Various methods for the deoxidation of a Cr-Ni-Mo-V steel during out-of-furnace treatment and their effect on the formation of nonmetallic inclusions

The effect of various methods of deoxidation during out-of-furnace treatment on the content and composition of nonmetallic inclusions in 15Kh2NMFA steel measured after out-of-furnace treatment and in forged pieces made from large ingots of this steel is studied.     

Energy saving for steelmaking in plasma-arc furnaces

A design for a plasma-arc steel-melting furnace with four plasma generators and a rational method for steelmaking, which can decrease the heat time and the electric energy consumption, are pro- posed. The rational arrangement of wall plasma generators in the liquid stages of a heat are determined by analytical investigations.