Published in Metallurgist
To analyze the dynamics of heating of an air tuyere by the finite-element method (axisymmetric problem), DEFORM-2D software is used. Different heat-insulation materials protecting air tuyeres against burnout were studied. It is recommended to test tuyeres with cones made from siliconized carbon-fiber fabric and ceramics with slip coating.
Published in Metallurgist
In this paper, the roller (three-roll) molding of a plate stock, based on elastoplastic bending, is investigated. Physical models of the deformation zone during the interaction of the workpiece with rolls are presented considering two stages: when the upper roll is moved without rotating the rolls and when all three rolls are rotated without moving...
Published in Metallurgist
In this work, a technological scheme for the coprocessing of dissimilar zinc-containing wastes, namely, slags obtained from the autogenous smelting of copper-zinc concentrates and dusts (sludges) from gas purification during blast furnace and steelmaking production, was developed. The proposed technology was confirmed to achieve the efficient utili...
Published in Metallurgist
The paper presents the results of studying the iron grain growth mechanism during carbothermal solidphase reduction of red mud in the presence of sodium sulfate. It was shown that the main mechanism of iron grain growth involves the formation of low-melting-point surface-active iron-sulfur compounds along the grain boundaries, which significantly a...
Published in Metallurgist
A hot-pressing technology for producing aluminum-based metal-matrix composite materials used to manufacture liquid-cooled base plates of electronic modules of active phased antenna arrays (APAA) was developed and tested. The technology involves the following operations: mixing of the starting components, adding of a binder, forming of blanks, hot p...
Published in Metallurgist
High-strength multi-component chrome pellets with specified physical and chemical characteristics were obtained for smelting chromium ferroalloys in the electric arc furnaces by mixing finely dispersed chromium concentrates, refined ferrochrome slags, and ferriferous diatomite ore with subsequent pelletization and sintering of the composition at 10...
Published in Metallurgist
The article discusses factors determining the reproducibility of measurement results for a banded microstructure in sheet steels St3sp and 09G2s using computerized procedures.
Published in Metallurgist
Extensive research is conducted and a production scheme is proposed, including recovery of copper-containing slag with coke carbon and neutralization of waste copper electrolyte with the product obtained.
Published in Metallurgist
Lead, zinc, and arsenic are associated elements in copper ores. Due to deterioration of concentrate quality and involvement in recycling of secondary raw materials, these impurities are increasingly circulated in copper-smelting production, most often collected in fine dusts. Recovery of these dusts for pyrometallurgical processing leads to contami...
Published in Metallurgist
The efficiency of statistical analysis of the results of acceptance tests (methods of classical statistics and cognitive graphics) for pipe metal quality heterogeneity is evaluated.
