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Graphite blocks are currently used in the concentrate-slag zone in primary PGM smelters, and can possibly be extended to the matte zone. This project evaluates the interaction between synthetic matte and graphite blocks on a laboratory scale. Static crucible tests were performed where graphite crucibles (prepared from standard and high-grade graphite) were filled with synthetic matte (27.7 per cent S – 46.1 per cent Fe – 17.0 per cent Ni – 9.2 per cent Cu) and heated to 1550°C for different time periods (1–5 days). Matte penetration was evaluated using a SEM, while graphite dissolution was evaluated by measuring the carbon content of the matte with a LECO carbon analyser. Matte penetrated into standard grade graphite up to approximately 2 mm, while matte infiltration into the high grade graphite was limited to the immediate hot face. The saturation solubility of graphite in the synthetic matte at 1550°C was 0.43 per cent. Copper, iron, nickel, and sulphur were detected in an accretion that formed in the water-cooled part of the furnace. This accretion consists of mainly Cu-S and Cu-Fe-S based phases.
@article{271b6dd7-66fe-4939-af94-a1fb3ce9815c,
title={INTERACTION OF GRAPHITE WITH SYNTHETIC MATTE},
author={B.M. Thethwayo and A.M. Garbers-Craig},
year={2012},
language={en}
}TY - JOUR TI - INTERACTION OF GRAPHITE WITH SYNTHETIC MATTE AU - B.M. Thethwayo AU - A.M. Garbers-Craig PY - 2012 LA - en ER -
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