https://doi.org/10.15255/KUI.2002.026
Published: Kem. Ind. 52 (6) (2003) 237–241
Paper reference number: KUI-26/2002
Paper type: Original scientific paper
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The Influence of Temperature on Iron, Sodium and Calcium Separation from Carbon Black

M. Legin-Kolar and A. Rađenović

Abstract

The aim of this paper was to show how the heat treatment up to 2 000 °C influenced the carbon blacks demetalization. Thermal stability is important characteristic of carbon blacks and for that reason changes in metal fraction before and after heat treatment of samples at 1 200, 1 600 and 2 000 °C, were examined. The samples were subjected 4 hours to high temperatures while heating rate was 10 °C min-1. The results showed that iron, sodium and calcium mas fraction depended on temperature, because, during heat treatment partial separation of investigated metals took place. Experimental results show that, of all the samples of investigated carbon blacks, sample 1 has been noticed. Although, the mas los of this sample was the greatest, the demetalization was rather poor. That means, that this carbon black must have contained more volatile matter and moisture. After heat treatment up to 2 000 °C, the highest fraction of separated metal was that of the calcium (240 μg g-1), and as well in sample 1. The mas fraction of calcium was the same as that at 1 200 °C so, that, decrease in calcium fraction was very poor. At 1 600 °C an apparent increase was noted, for iron and sodium, due to the mas los of all carbon blacks. The cause was the influence of heat treatment at 1 600 and 2 000 °C on carbon blacks mas los. The results obtained suggested that the separation of metal constituents during heat treatment was partial and different for each element.

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Keywords

carbon black, determination mas fraction iron, sodium and calcium content, heat treatment