Ivanchenko D.V.

Efficiency of the Functional Distribution of Solid Fuel in Layered System Consisting of Ore-Flux-Fuel Compositions

In this article processes of pelletizing and sintering iron ore pellets with different distribution of solid fuel in multilayer system were experimentally investigated. The influence of the functional distribution of solid fuels on the compressive strength and the degree of metallization fired pellets was studied. Compressive strength of burnt pellets with basicity of 1.4, which contain increased amounts of particulate fuel in range of 1,6–2,35 kN/pellet and not characterized by high indices, although GOST has indices on level 0,2–0,95 kN /pellet.

Methods of Creating a Layered System from Ore-Flux-Fuel Compositions with a Higher Content of Solid Fuel

Four methods of obtaining pellets with fluxing ore compositions with higher content of solid fuel, based on the combination of feedstock sintering process and sintering at a temperature of 1593–1598 K, namely: 1) a method wherein the solid fuel was mixed with the initial charge materials directly before agglomeration; 2) a method wherein the solid fuel was rolled on the surface of granules of size 10–15 mm, and after that pellets were burned out; 3) the method in which varying particles solid fuel (50 %) were also mixed with the raw materials before sintering, while the second part of them – w

Investigation of Iron Ore Pellets Sintering with High-Content of Solid Fuels

This paper experimentally confirmed the possibility to obtain fluxed pellets with sufficient strength and high degree of metallization and cost-effective for it use in the blast furnace process. Specifically, we study the influence of the mineral composition of pellets by their strength and establish that the pellets strength with high basicity is somewhat reduced in the temperature range 1473–1493 K due to the significant amount of more brittle slag frame and decrease of the oxidation of pellets, which consequently reduces the amount of hematite, but meets GOST requirements.

The Current State of Production Capacities of Metallurgical Industry in Ukraine

The paper presents the analysis of the current state of the metallurgical industry in Ukraine and highlights key problems of its revival in the post-crisis period. Most of domestic steel enterprises use outdated technologies such as open-hearth production and blooming. In addition, the equipment depreciation in average is about 65 %. It hinders Ukrainian steel producers to successfully compete in domestic and foreign markets. A significant drawback of the current state of the industry is limited government backup and impact on its development.

Nanotechnologic Bases of ZrF4 Application to Increase the Strength of Cast Aluminum Alloy AK12M2

In this paper, we demonstrate that B.B. Gulyaev’s quasi-static representations of macroprocesses in cast aluminum alloys should be further elaborated. We theoretically justify and experimentally confirm the quantitative influence of ZrF4 nanoparticles on determining its optimal entry and strength of the alloy AK12M2. We propose physical and chemical foundation for the salvation model of ZrF4 nanodistribution, notably particles of ZrF4 modifier in a state of statistical lattice of cast aluminium alloy.

The Foundry Aluminium Alloy for Hydrogen-Storage Barrels

This study deals with the influence of hydrogen and out-of-furnace treatment of melt on mechanical properties and corrosion resistance of Ak9 alloy type. We determine that the hydrogen treatment of melt by compounds and the out-of-furnace treatment by a complex modifier further the increase of strength and corrosion resistance of AK9 alloy type. This alloy is recommended as a material for making the protective barrier shell of a vessel of gaseous hydrogen storage.