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Year 2002 No 2

Tomášek K.
INFLUENCE OF MAGNESIUM OXIDE ON PHYSICAL PROPERTIES OF FAYALITIC AND CALCIUMFERRITIC SLAG MELTS
Keywords: slag|melt|density|surface tension|structure|magnesium oxide|
No 2 (2002), p. 93-99
  mag01.pdf (97 kB)
mag01_eng.txt (2 kB)  

Kvačkaj T.
RESEARCH OF BH-EFFECT IN STEEL SHEET FOR AUTOMOBILE INDUSTRY
Keywords: bake hardening|work hardening|auto body steel sheet|mechanical properties|plastical properties|cold rolling|annealing|
No 2 (2002), p. 100-108
  mag02.pdf (109 kB)
mag02_eng.txt (1 kB)  

Pešek L., Olejníčková L., Jonšta Z.
ULTRASONIC METHOD FOR MEASUREMENT OF YOUNG´S MODULUS ON TOOL CERAMICS
Keywords: Ultrasonic Contact Impedance|UCI|Young's modulus|modulus of elasticity|hardness|tool ceramics|silicon nitride|Si3N4|testing method|
No 2 (2002), p. 109-116
  mag03.pdf (173 kB)
mag03_eng.txt (2 kB)  

Kaduková J., Komorová T.
SILVER BIOACCUMULATION AND BIOSORPTION BY ALGA CHLORELLA KESSLERI FROM MODEL SOLUTIONS
Keywords: bioaccumulation|biosorption|Chlorella kessleri|silver|
No 2 (2002), p. 117-123
  mag04.pdf (158 kB)
mag04_eng.txt (2 kB)  

Laubertová M., Havlík T.
MICROWAVE CHALCOPYRITE LEACHING IN ACIDIFIED FERRIC SULPHATE
Abstract
The leaching characteristics of chalcopyrite concentrate (-80 +60µm granularity), in acidified Fe2(SO4)3 solution under microwave field was investigated in this paper. Slovak chalcopyrite concentrate from Slovinky deposit was used. The original apparatus from dressed home microwave oven was developed and built up. The silica tube with diameter 45 mm and high 600 mm was used as a rector. This method enables extremly fast heating of leaching pulp due to interaction between microwave energy and water solution. High leaching temperature, fast leaching time and intensive agitation without the mechanical tool are the main advantages of this method. The concentration of ferric sulphate within the range of 0 - 1 M of Fe2(SO4)3, whereas the concentration of sulfuric acid 0.5 M was kept, on copper efficiency was studied. After two hours of leaching the copper efficiency is equal to 28.68 %.
Other tested methods described in the literature gave at the comparable conditions the copper efficiences under this value what means that microwave leaching of chalcopyrite is the most effective method among these tested methods. Microwave radiation also plays certain role in the leaching. This fact is not fully clear up to present and that is a reason why it could be the challenge for further research.

Keywords: hydrometallurgy|microwave energy|leaching|chalcopyrite|ferric sulphate|
No 2 (2002), p. 124-128
  mag05.pdf (145 kB)
mag05_eng.txt (1 kB)  

Miškufová A.
PREPARATION OF CAO CLINKERS FROM POWDERED NATURAL LIMESTONES
Keywords: limestone|powder pressing|CaO clinker|bulk density|porosity|microstructure|impurities|hydration rate|
No 2 (2002), p. 129-137
  mag06.pdf (167 kB)
mag06_eng.txt (2 kB)  

Trišč A.
THE EFFECT OF GASEOUS PHASE COMPOSITION AND IRON ORE:IRON CONCENTRATE RATIO ON SINTERED BED PERMEABILITY
Keywords: permeability|sinter charge|high output of sinter machine|iron ore|iron concentrate ratio|gaseous phase composition|
No 2 (2002), p. 138-144
  mag07.pdf (191 kB)
mag07_eng.txt (1 kB)  

Bidulská J., Kvačkaj T., Bodák V., Bidulský R.
CREATION OF MICROGEOMETRY COLD ROLLING STRIP OF MATERIAL ST 15
Keywords: bating strip|electric discharge texturing|surface microgeometry|average roughness|peak count|
No 2 (2002), p. 145-150
  mag08.pdf (153 kB)
mag08_eng.txt (1 kB)  

Varga A., Zsigraiová Z., Andrejaninová E.
ANALYSIS OF BLACK PLATE ANNEALING PROCESS AT CONTINUOUS ANNEALING LINE APPLYING MATHEMATICAL MODEL
Keywords: annealing line|tin plate|thermal regime|mathematical model|heat transfer|specific heat consumption|
No 2 (2002), p. 151-159
  mag09.pdf (177 kB)
mag09_eng.txt (1 kB)  

Kvačkaj T.
DEVELOPMENT TENDENCIES OF METAL FORMING TO 21. CENTURY
Keywords: development trends|metallurgy|metal forming|technologies|teaching|globalisation|
No 2 (2002), p. 160-164
  mag10.pdf (197 kB)
mag10_eng.txt (1 kB)  

Ivánová D., Kavuličová J., Sučik G., Škrobian M., Laco T., Ďurišin J.
THE EFFECT OF ADMIXTURES ON THE DECREASE OF HYPOTHETICAL MELTING POINT OF -IRON
Keywords: hypothetical melting point of -Fe|solidification temperature|Le Chatelier- Šreder equation|
No 2 (2002), p. 165-172
mag11_eng.txt (1 kB)  

Plešingerová B., Súčik G.
THERMAL AND MOISTURE EXPANSION OF POROUS BISCUIT BODIES
Keywords: thermal expansion|biscuit - fired porous body|moisture expansion|
No 2 (2002), p. 173-179
  mag12.pdf (213 kB)
mag12_eng.txt (2 kB)  

Rákoš J.
SUBATOMIC FEATURES OF A STANNUM DIOXIDE LAYER
Keywords: subatomic layer|stannum dioxide|large-scale application technology|ultra-thin layers|
No 2 (2002), p. 180-188
  mag13.pdf (168 kB)
mag13_eng.txt (3 kB)  

Ružičková S., Jankovská E., Koller L.
A NEW SPECTROMETRIC TANDEM TECHNIQUE FOR DIRECT ANALYSIS OF SOLID SAMPLES
Keywords: atomic emission spectrometry|direct analysis of solid samples|separated evaporation and excitation of elements|
No 2 (2002), p. 189-195
  mag14.pdf (145 kB)
mag14_eng.txt (2 kB)  

Buchovecká D., Mihok Ľ., Šamu Z.
CLEANNESS OF STEEL SCRAP FOR OXYGEN CONVERTER PROCESS
Keywords: steel scrap|tramping elements|selectivity|
No 2 (2002), p. 196-225
  mag15.pdf (215 kB)
mag15_eng.txt (1 kB)