Visits: 82690994
AMS now reading: 1




Year 1999 No 4

Blacha L., Steindor J.
MÖGLICHKEITEN DER BI - ENTFERNUNG AUS FLÜSSIGEM CU DURCH VERDAMPFEN
Keywords:
No 4 (1999), p. 240-250
  mag01.pdf (112 kB)
mag01_eng.txt (429 B)  

Ballóková B., Hvizdoš P., Lofaj F.
MICROSTRUCTURE AND FRACTURE MECHANICAL PROPERTIES
Keywords:
No 4 (1999), p. 251-256
  mag02.pdf (86 kB)
mag02_eng.txt (2 kB)  

Plešingerová B., Kriššaková S., Števulová N., Trpčevská J.
CHARACTERISATION OF MA-SPINEL OBTAINED BY SOLID-STATE SYNTHESIS FROM POWDERY MG AND AL OXIDES AND HYDROXIDES
Keywords: MA-spinel|solid-state synthesis|conversion to spinel|mechanochemical reaction|
No 4 (1999), p. 257-266
  mag03.pdf (223 kB)
mag03_eng.txt (2 kB)  

Raschman P.
UNCERTAINTY OF KINETIC LEACHING DATA INTRODUCED BY APPLIED EXPERIMENTAL PROCEDURE
Keywords: leaching|kinetics|experiment|measurement|sources of inaccuracy|
No 4 (1999), p. 267-274
  mag04.pdf (203 kB)
mag04_eng.txt (3 kB)  

Fedoročková A.
EFFECT OF REACTION CONDITIONS ON DISSOLUTION OF MAGNESIUM, IRON AND CALCIUM DURING LEACHING OF BURNED MAGNESITE IN HYDROCHLORIC ACID
Abstract
Dissolution rates of magnesium, iron and calcium during the leaching of burned magnesite in hydrochloric acid solutions were studied in a laboratory isothermal, mechanically mixed, batch reactor under different reaction conditions (temperature, acid concentration and particle size). It was observed that: (a) In all leaching tests more than 95% of calcium had dissolved before the first sample of solution was withdrawn, i.e. in times shorter than 2 minutes. (b) Dissolution rates of magnesium and iron increased with temperature and decreased with particle size - the latter fact is caused by law porosity of the solid. ( c) HCl concentration had different effects on the rates of dissolution of magnesium and iron: while the rate of dissolution of the magnesium decreased with increasing cHCl , that of iron increased with cHCl at lower conversions (< 0.4) and decreased at higher conversions (> 0.4) - this effect is caused by simultaneous dissolution of iron from different minerals.

Keywords: leaching|burned magnesite|hydrochloric acid|magnesium|calcium|iron|
No 4 (1999), p. 275-279
  mag05.pdf (189 kB)
mag05_eng.txt (1 kB)  

Mihok Ľ., Fedičová D., Weagová Z., Potocký Ľ., Öveçoglü M.L.
INFLUENCE OF GANGUE CONTENT ON PROPERTIES OF BLAST FURNACE PELLETS
Keywords: blast furnace pellets|gangue content|
No 4 (1999), p. 280-287
  mag06.pdf (147 kB)
mag06_eng.txt (448 B)  

Plešingerová B., Macáková J., Klapáč M.
DETERMINATION OF DIMENSIONS OF THE PATTERN FOR THE MANUFACTURING OF PLASTER MOULDS FROM SHRINKAGE OF CERAMIC BODY
Keywords: dimensions of pattern|shrinkage of ceramic body|casting|
No 4 (1999), p. 288-293
  mag07.pdf (194 kB)
mag07_eng.txt (810 B)  

Cehlár M., Kyseľová K.
FEASIBILITY STUDY AND HER CALCULATIVE EXECUTION
Keywords: investment analysis|ash-flow|internal rate of return|net present value|pay back period|
No 4 (1999), p. 294-309
  mag08.pdf (265 kB)
mag08_eng.txt (2 kB)