Production of Iron, Titanium Dioxide Modofocations and Titanium

Conditions for the reduction of titanium-magnetite concentrates (main components are Fe 52–54 % and TiO2 5–7 %) by natural gas for obtaining iron powder and titanium fraction were studied. Based on the theory of granulation in the drum apparatus, granules with 25 % of soda fluxing additive with optimum diameter, humidity, strength and porosity were obtained. It was found that the reduction reactions in the temperature range of 1143–1198 K are carried out if a mixture of hydrogen and carbon monoxide is added to the natural gas in amount of 15 vol %.

Theoretical analysis and experimental study of H2S dissociation processes in ultrahigh-frequency plasmotron

Theoretical analysis of aerodynamic conditions in a plasma chemical reactor with tangential gas supply is carried out. It is shown that due to the creation of a swirling flow in the reactor there is a pressure gradient, due to this along the vertical axis there is a vacuum zone, which contributes to the occurrence of plasma discharge.

Partial case of thermochemical analysis of cavitation sonolysis of water

The mechanism of water sonolysis with the formation of both intermediates (free radicals) and basic products (hydrogen and oxygen), which are important for thermal power engineering and water purification technologies, based on the use of advanced oxidation processes, wasresearched. The efficiency of hydroxyl radical generation in the environment of inert gases and oxygen was analyzed.

Corrosion-Electrochemical Behaviour of Low-Alloy Steel in Alkaline Media

The authors demonstrated that low-alloy chrome-molybdenum-vanadium 12Cr1MoV steel has more positive open circuit potential and lower hydrogen evolution overvoltage in concentrated alkaline solution, compared to ordinary-quality St3 steel. After 1100 A∙h∙m-2 charge passing, 12Cr1MoV anodic dissolution rate becomes lower than St3 dissolution rate. It does not increase with current density increase.