a Study on Usability of Mill Scale in Pellet Production


ŞEŞEN F. E. , Işıkgül O., ARISOY C. F. , ŞEŞEN M. K.

Scientific and Technical Journal Metallurgical and Mining Industry, no.5, ss.110-119, 2016 (Diğer Kurumların Hakemli Dergileri)

  • Basım Tarihi: 2016
  • Dergi Adı: Scientific and Technical Journal Metallurgical and Mining Industry
  • Sayfa Sayıları: ss.110-119

Özet

Abstract Mill scale is an iron oxide layer that is formed as a result of the oxidation that occurs during continuous casting, annealing and rolling of slabs and ingots in steel making. This material, which is composed of oxides of the elements in steel, is made mainly of iron oxide. Mill scale, which has been considered a waste in mini steel making plants with EAF (Electric Arc Furnace), must be recycled in every case. In this study, it was aimed to determine whether mill scale is able to be used in pellet production by mixing it with magnetite ore concentrate, without grinding it in very fine dimensions. The pellet production experiments were carried out in a laboratory-scale pelletizing disc. Effect of mill scale content in pellet production was investigated in means of mechanical properties. The mill scale was used after grinding it under 1 mm dimension while the magnetite ore concentrate was used in the pelletizing size. Optimum mill scale/magnetite ore concentrate ratio was determined as a result of the study. Pellets that were produced with the addition of mill scale which had a size of up to 1 mm possessed sufficient mechanical properties for charging into the blast furnace unless mill scale content in pelletizing blend exceeded 50% in weight. Keywords: PELLETIZING, MILL SCALE, CAPILLARITY, BALL FORMATION, MAGNETITE ORE CONCENTRATE