Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Milan Škrobian"'
Publikováno v:
Acta Polytechnica, Vol 55, Iss 5, Pp 301-305 (2015)
This study reports on an investigation of factors affect the process of compacting Al chips which are used to direct scrap processing through the forward extrusion method. EN AW 6060 chips of different geometry and types were mainly used as the exper
Externí odkaz:
https://doaj.org/article/ae274ec3d06b497a877fad16b0b67a15
Autor:
Rudolf Pernis, Milan Škrobian
Publikováno v:
Acta Metallurgica Slovaca. 27:32-35
A mathematical equation has been derived that describes impurity distribution in ingot after second pass of zone refining. While an exponential impurity distribution is calculated by a simplified model after first pass, second pass is described by mi
Autor:
M. Rajňák, Matej Tešinský, Nina Daneu, Peter Baláž, Milan Škrobian, Julien Marquardt, Matej Baláž
Publikováno v:
Advanced Powder Technology. 31:782-791
The large-scale mechanochemical reduction of binary sulfides chalcocite (Cu2S) and covellite (CuS) by elemental iron was investigated in this work. The reduction of Cu2S was almost complete after 360 min of milling, whereas in the case of CuS, a sign
Publikováno v:
Acta Metallurgica Slovaca, Vol 20, Iss 3 (2014)
This article deals with the analysis and comparison of the conditions for solid state welding during extrusions by means of numerical simulation. Numerical simulations made on four different matrices, such as square die without integrated extrusion a
Externí odkaz:
https://doaj.org/article/d9eb043bbec04930a04afeec363c5fe7
Publikováno v:
Materials Science Forum. 782:394-397
The paper is concerned with an analysis of utility properties of selected aluminium alloys, namely EN AW 6082 (AlSi1MgMn), EN AW 6061 (AlMg1SiCu) and EN AW 7075 (AlZn5.5MgCu) with different technology of hot processing. The alloys were hot processed
Publikováno v:
Acta Metallurgica Slovaca, Vol 21, Iss 2 (2015)
A die setup for direct hot extrusion of extra-short aluminium alloys billets used in semi-pilot plant tests was simulated using DEFORM ™ 2D/3D software and results were compared with experiment. A die setup without welding chamber proved to shorten
Publikováno v:
Acta Metallurgica Slovaca, Vol 21, Iss 1 (2015)
The effect of heat treatment on microstructure and mechanical properties of extruded SiC/6061 aluminium alloy matrix composite was investigated. The heat treatment (annealing at 540 °C for 1.5 hours, water quenching and artificial aging at 170 °C f
Publikováno v:
International Journal of Mineral Processing. 43:61-72
In this study the kinetic leaching characteristics of chalcopyrite concentrate from Cuba (32.3% Cu) were investigated with granularities − 315 + 200 μm as delivered. The value of the apparent activation energy was determined to EA = 55 ± 5 kJ/mol
Publikováno v:
Hydrometallurgy. 31:201-212
The results obtained by leaching stibnite with a basic solution of sodium hydrogen sulphide are presented in this paper. The intensification of leaching by the mechanical activation produced by grinding the mineral in a planetary mill for 20 min brin
Autor:
F. Špaldon, Jaroslav Briančin, Tomas Havlik, Milan Škrobian, Peter Baláž, G. Paholič, A. Luptáková, Z. Bastl
Publikováno v:
International Journal of Mineral Processing. 32:133-146
In this paper the changes of the chalcopyrite, chemically preleached with the solution of iron (III) sulfate, are described and the possibilities of its subsequent leaching by the bacteria Thiobacillus ferrooxidans are examined. It has been found tha