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Year 2002 No 1

NIESLER M.
METHOD OF TESTING OF REACTIVITY OF COKE WITH DIFFERENT GRAIN SIZES AND ITS VERIFICATION UNDER INDUSTRIAL CONDITIONS
Keywords: coke reactivity|reactivity testing|grain size|blast furnace|coke|
No 1 (2002), p. 5-17
  mag01.pdf (111 kB)
mag01_eng.txt (908 B)  

Mulak W., Chojnacka M., Sułek B.
ENHANCEMENT OF NICKEL SULPHIDES LEACHING BY ACTIVATED CARBON
Keywords: hydrometallurgy|millerite|leaching|activated carbon|
No 1 (2002), p. 18-23
  mag02.pdf (90 kB)
mag02_eng.txt (737 B)  

Kohútek I., Käerdi H., Besterci M., Kulu P., Mikli V., Velgosová O.
CHARACTERISATION OF MORPHOLOGY OF POWDER PARTICLES
Abstract
In this paper were characterised the morphology of powder particles by analyse of the influence of different shape descriptors on disintegrated WC-Co hardmetal powder particles produced by multiple disintegrator milling.
A very important parameter of powder particles produced by mechanical methods is their angularity that can be characterized by numerous shape factors. In this work were used the "spike parameter" SPQ and shape factors (roundness RN, roundness factor RNF, irregularity parameter IP, elongation EL and dispersion DP). On the basis of evaluation of WC-Co hardmetal powder particles were determined the following:
the irregularity parameter (IP) and spike parameter - quadratic fit (SPQ), the numerical descriptors for shape factor that adequately characterize the particle morphology, may be used to characterize powders produced by mechanical methods. With an increase in the angularity of regular configuration (from circular to triangular), the values of parameters IP and SPQ are in the range of 1.0-2.0 and 0--0.866, respectively.
the shape factor parameter SPQ studied for characterizing WC-Co hardmetal powders is a more sensitive factor for angularity than irregularity parameter IP. For disintegrator ground powders, the values of SPQ parameters are in the range of 0.652-0.258. At the same time the average values of the irregularity parameter IP, what takes into account of ellipticity and irregularity of particles were in the range of 1.89 to 1.76.

Keywords: powder particles|morphology and geometrical shape parameter|
No 1 (2002), p. 24-29
  mag03.pdf (154 kB)
mag03_eng.txt (1 kB)  

Blacha L., Steindor J., Sosnowski R.
THE INFLUENCE OF AN APPLIED ATMOSPHERE ON PB EVAPORATION RATE FROM CU-PB ALLOYS
Keywords: Metal refining|Copper metallurgy|Lead metallurgy|
No 1 (2002), p. 30-34
  mag04.pdf (194 kB)
mag04_eng.txt (1 kB)  

Marasová D., Najajreh A.
SOLUTION OF WIRE ROPE NET FOR SAFETY PLATFORMS BY FINITE ELEMENT METHOD
Keywords: cable net platform|finite element method|stress-strain states|Cosmos/M|
No 1 (2002), p. 35-42
  mag05.pdf (166 kB)
mag05_eng.txt (915 B)  

Trišč A., Čurilla J., Kendera J.
OPTIMISATION OF COLD BONDED PELLETS PRODUCTION FROM BOF SLUDGES AND DUSTS
Keywords: sludge|dust|pellets|cement|
No 1 (2002), p. 43-49
  mag06.pdf (195 kB)
mag06_eng.txt (1 kB)  

Petrík J., Szarvasy P., Špeťuch V.
THE INFLUENCE OF COOLING RATE AND MN AND FE CONTENT ON THE STRUCTURE AND MECHANICAL PROPERTIES OF AL-SI ALLOY
Keywords: AlSi alloy|cooling rate|structure|mechanical properties|
No 1 (2002), p. 50-58
  mag07.pdf (169 kB)
mag07_eng.txt (5 kB)  

Bauer V., Škvarla J., Zeleňák F.
PRESENT STATE OF ORE MINING IN SLOVAK REPUBLIC
Keywords: mining|gold ore|deposit|marketing|
No 1 (2002), p. 59-68
  mag08.pdf (204 kB)
mag08_eng.txt (1 kB)  

Gülbas M., Kammel R., Lieber H.-W.
IMPROVEMENTS OF HYDROMETALURGICAL PROCESSESBY APPLICATION OF THE ACID RETARDATIONPROCEDURE - ACTUAL SITUATION AND DEVELOPMENTS
Keywords: hydrometallurgy|acid retardation procedure|pickling solution|acid waste solutions|ecological aspects|economical aspects|
No 1 (2002), p. 69-76
  mag09.pdf (101 kB)
mag09_eng.txt (1 kB)