EFEK DISTRIBUSI PARTIKEL DAN PERLAKUAN PANAS PADA PENGOLAHAN BESI OKSIDA DARI LIMBAH INDUSTRI BAJA

Abstract

The effect of particle size and heat treatment on the iron oxide powder from industrial waste have been studied in this research. Hot rolling Mill Scale and nickel pig iron (NPI) waste were used in the experiment. The raw materials were screened using standard test sieve No. #50, #100, and #200 mesh. The filtered powder was heat treated using high temperature furnace in different temperature of 900 and 1000 °C 2 for 1 hour then compacted under the pressure of 40 kgf/cm. The XRF analysis shows that the Mill Scale and NPI were consisted of Iron element of 98 and 52 wt%, respectively. The particle size distribution effect shows that the true density was increased as the particle size decreased. The bulk density of Mill Scale was increased as the particle size increases. In contrary, the bulk density of NPI was decreased as the particle size increases. The microstructure effect of raw material as the effect of heat treatment was affected to the changing of magnetic properties. The magnetization was increased as the FeO and Fe3O4 phases increase. On the other hand, the magnetization was reduced as the increasing of Fe2O3 and SiFe2O4 phases. The understanding of the iron waste manufacturing is a basic step to be applied as the oxide based magnetic material (ferrite). 

Keywords : Mill Scale, Nickel Pig Iron, Industrial Waste, microstructure, magnetic hysteresis