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Year 2003 No 4

Kupka D., Škvarla J., Birošová E.
EVALUATION OF GROWTH RATE OF ACIDITHIOBACILLUS FERROOXIDANS OXIDIZING ELEMENTAL SULFUR
Keywords: Acidithiobacillus ferrooxidans|sulfur|oxidation|growth kinetics|oxygen|carbon dioxide|gas analysis|sulfate|
No 4 (2003), p. 251-258
  mag01.pdf (344 kB)
mag01_eng.txt (639 B)  

Barakat M. A.
PYROMETALLURGICAL PROCESSING OF ZINC ASH AND FLUE DUST
Keywords: Zinc ash|Zinc flue dust|Pyrometallurgy|Hyrometallurgy|Waste treatment|
No 4 (2003), p. 259-269
  mag02.pdf (181 kB)
mag02_eng.txt (1 kB)  

Laubertová M., Havlík T., Gaľová P.
THE APPLICATION OF MICROWAVE ENERGY ON THE LEACHINGOF CHALCOPYRITE CONCENTRATE IN ACIDIFIED OXIDIZING MEDIUM
Keywords: hydrometallurgy|microwave energy|chalcopyrite|ferric chloride|ferric sulphate|grain size|
No 4 (2003), p. 270-276
  mag03.pdf (283 kB)
mag03_eng.txt (1 kB)  

Zrník J., Nový Z., Kvačkaj T., Bernášek V., Kešner D., Slámová M.
INFLUENCE OF DEFORMATION PROCESSING ON STRUCTUREAND PROPERTIES DEVELOPMENT OF AlMgSi ALLOY
Keywords: hot and cold plastic deformations|severe plastic deformations|SPD|equal-channel angular pressing|ECAP|recrystallization annealing|
No 4 (2003), p. 277-284
  mag04.pdf (1 MB)
mag04_eng.txt (2 kB)  

Kvačkaj T., Sokolová L., Vlado M., Mišičko R., Vrchovinský V., Nový Z.
PULSATORY FORMING – NEW METHOD OF BULK HOT PLASTIC DEFORMATIONS
Keywords: pulsator|pulsation forming|pulsation frequency|microstructure|geometrical characteristics|mechanical properties|plastic properties|formability|
No 4 (2003), p. 285-291
  mag05.pdf (443 kB)
mag05_eng.txt (1 kB)  

Khouri S, Horodníková J., Domaracká L., Bohušová V.
MANAGEMENT INFORMATION SYSTEMS
Keywords: management information systems|exploited enterprises|financial management|
No 4 (2003), p. 292-297
  mag06.pdf (212 kB)
mag06_eng.txt (3 kB)  

Vlado M., Hala K., Janák G., Hodor P., Adamkovičová J., Sokolová L.
STRUCTURAL ANALYSIS AND BASIC MECHANICAL PROPERTIES OF HOT ROLLED STRIP FROM GRAIN ORIENTED SILICON STEEL WITH HIGH COPPER CONTENT
Keywords: grain oriented silicon steel|core loss|hot rolling|structure|precipitation|mechanical properties|
No 4 (2003), p. 298-305
  mag07.pdf (1 MB)
mag07_eng.txt (1 kB)  

Harrer O., Philipp M., Pokorný I.
NUMERICAL SIMULATION OF ASYMMETRIC EFFECTS IN PLATE ROLLING
Keywords: front end bending in plate rolling|warping phenomenon in plate rolling|ski end control in plate rolling|asymmetry in strip and plate rolling|
No 4 (2003), p. 306-313
  mag08.pdf (347 kB)
mag08_eng.txt (1 kB)  

Bálintová J., Drozd.J., Kucková A.J., Fröhlichová M.
BIOLOGIC TREATMENT OF WASTE WATERS FROM COKE PRODUCTION
Abstract
The coking plant in U. S. Steel Košice, s.r.o., is the only cokery in Slovakia. It produces 50 till 65 m3/h of waste waters, mainly of organic origin, which are toxic to the biomass, but they are biologically decomposable. Coke waste water contains appreciable concentracions of pollutants such as phenols, cyanides, tiocyanate, hydrogen sulfide and ammonia.
Raw waste water from cokery contains higher concentrations of toxic substances, than is the admissible value for the biological waste water treatment. This concentracion of pollutants is reduced to required attributes by preliminary treatment which includes the elimination of ammonia, sulphate and hydrogen cyanide.
Trimming waste waters from coke production runs in a biological waste water purifier according to a project of Saarberg Hőlter Wassertechnik GmbH Essen.
In the process of biological purifying phenols oxidate and decompose to carbonic acid and water. With the help of microorganism they produce certain amount of biological slime. Cyanides and sulphocyanides convert to ammonia, that biologically oxidates to nitrates and consequently reduces to gaseous nitrogen.
The contribution introduces the determination results, which state the optimal amount consumption of the chemical stock predetermined for pretreatment and biological purifying of waste water in a plant, as well as the comparison their projected and actual consumption, which brought the cost reduction at waste phenolammoniacal waters treatment to allowable pollution level.

Keywords: waste waters from cokeries|biological waste water treatment|phenolammoniacal waters|
No 4 (2003), p. 314-320
  mag09.pdf (247 kB)
mag09_eng.txt (2 kB)