1 A member of the Anglo American plc group Utilisation of the -8+5mm Sishen iron ore fraction in the Sintering process September 2008 Andre Dippenaar

2 Introduction Sishen mine products: Lump ore: -25+8mm Fine ore: -5mm Intermediate fraction: -8+5mm

3 Pilot Plant Sinter Pot tests Bc sinter – 50% fine Thaba, 50% fine Sishen Coarse Sinter - Half of fine Sishen replaced with coarse Sishen 50% fine Thaba, 25% fine Sishen, 25% coarse Sishen Concentrate additions – 5, 10 and 15 %

4 Experimental Procedure Sinter spesifications % SiO % MgO0.77 % FeO8.0 Basicity%CaO/SiO 2 = 2.0

5 Experimental Procedure Sinter working procedures Sinter outputs Tests on sinter product

6 Results – Ore fractions used Ore Sieve analyses

7 Results Identification of the different pot tests : Fine Sishen sinters FS 0C- Base case sinter with 50% Fine Sishen and 0% Concentrate FS 5C- Fine sinter with 45% Fine Sishen and 5% Conc. Coarse Sishen sinters CS 0C- Coarse sinter with 25% Fine Sishen, 25% Coarse Sishen and 0% Conc. CS 5C- Coarse sinter with 20% Fine Sishen, 25% Coarse Sishen and 5% Conc CS 10C- Coarse sinter with 15% Fine Sishen, 25% Coarse Sishen and 10% Conc. CS 15C- Coarse sinter with 10% Fine Sishen, 25% Coarse Sishen and 15% Conc

8 Results Raw material Mixture Sieve analyses FS 0C – 2.5 mm CS 0C – 3.23 mm

9 Results - Sinter Pot Tests

10 Results – Production Rate

11 Results – Fuel Consumption

12 Results – Cake Shrinkage

13 Results – Sinter Product size

14 Results – Physical and Metallurgical properties

15 Results – Cold Strength

16 Results – Hot strength mm

17 Results – Hot strength -0.5mm

18 Results – Reducibility

19 Results – High temperature properties

20 Results – High temperature properties

21 Results – Mineralogy

22 Results – Mineralogy

23 Results – Mineralogy

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