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Abstract

The presence of sulphur in the blast-furnace burden has a detrimental effect on the economics of the ironmaking process. There are three basic areas where sulphur reduction could take place, during charge preparation, during carbonisation and in the post-carbonisation stage. Several methods could be applicable to reducing the sulphur content of metallurgical cokes. However, the success of these methods is limited to finely divided coals, which are of limited applicability to coke making. During carbonisation the retention of sulphur in coke is rank dependent, high rank coals retaining about 70% and low rank coals about 50% of their original sulphur. Of the numerous additives used to promote sulphur reduction, only titanium dioxide was found to be effective, although the mechanism for this reduction was not deduced. Studies of variations in carbonisation conditions have shown that there is little scope for further sulphur reduction beyond that normally occurring during carbonisation. Similarly, post-carbonisation treatments with reactive gases and liquids, using conditions likely to be acceptable in metallurgical coke production, have not shown any further sulphur reductions.

Additional information

Authors: BRITISH COAL CORPORATION, Coal Research Establishment, Cheltenham (GB)
Bibliographic Reference: EUR 12348 EN (1990) 81 pp., MF, ECU 4, blow-up copy ECU 11.25
Availability: (2)
Record Number: 199010303 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en