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The task was to test if important sinter characteristics, such as the physical and metallurgical properties of the finished sinter product can be improved further by separate processing of the ore fractions and by using screened and classified fluxes and fuel. Specific processing techniques were to be developed for the finest fractions of the ore mix. With an ore mix typical of the EU, a total of 75 pot-grate tests were run under the conditions which are rated optimal today. From the test series with the various fractions, the most important tests were selected and compared with results obtained when sintering the original ore mix -10 mm, based on the following criteria:

- Specific production rate;
- Specific coke consumption;
- Sinter strength;
- Reduction rate;
- LTD index (500 C);
- RDI (550 C).

Specific processing of the extremely fine fraction 0.01 - 0.5 mm was not viable. All in all, six series were performed with the various fractions which had been classified wet or dry. Overall, the most favourable metallurgical properties were achieved when sintering the original ore mix with classified fluxes and classified coke. The pellet sinter exhibited the lowest reducibility, but proved to be very stable in the low-temperature range. e range.

Additional information

Authors: KORTMANN H, Studiengesellschaft für Eisenerzaufbereitung, Liebenburg (DE);CAPPEL F, Lurgi Metallurgie GmbH, Frankfurt (DE)
Bibliographic Reference: EUR 16679 DE (1997) 132pp., FS, ECU 23.00
Availability: Available from the (2)
ISBN: ISBN 92-828-0954-4
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