Study on reducibility and porosity of metallurgical sinter

Abstract

The paper dealt with research on structural properties of metallurgical sinter. It was aimed at studying of sinter porosity and density in relation to its reducibility. For porosity determination was used immersion technique using Archimedes principle. Density was measured by gas pycnometer and apparent density was calculated from results of measured porosity. These properties were studied in relation to temperature 950 degrees C at which reducibility tests of every sample were carried out according to ISO 4695:2007. For the study 7 batches of 5 samples of sinter originated from industrial metallurgical plant were sorted. The porosity and density were discussed for virgin samples before the test of reducibility and for reduced samples after ISO test. The effect of 950 degrees C on the properties was contemplated and SEM analysis was carried out. The samples porosity before reduction test was in range from 5.1% to 9.82% and for the samples after reduction test it was 32.77-44.12%. The density of samples was not significantly affected by temperature with values ranging from 3.65 to 3.82 g cm(-3) for virgin samples, resp. 4.87-5.37 g cm(-3) for samples after reduction.