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1 Zeszyty Naukowe. Górnictwo / Politechnika Śląska

1 1998

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Wpływ udziału odsiewu grudek z rudy El-Dekhaila w spiekanej mieszance z rudy z podwyższoną zawartością manganu

Ahmed Y.M.Z., Shalabi M.E.H., Zaher F.M.S., El-Ebiary N.N., El-Afifi Y.S.

Zeszyty Naukowe. Górnictwo / Politechnika Śląska

1998

z. 238

9-29

W referacie przedstawiono laboratoryjne wyniki badań nad wpływem udziału odsiewu grudek z rudy El-Dekhaila (około 67% Fe) w mieszance z rudy El-Baharia zawierającej podwyższoną ilość MnO( 5,2%) i alkalidow ( 0,7%K20 + Na2O) na parametry procesu i własności spieku.

El-Baharia iron ore, which is the only ore currently Helwan and Steel complex is using has manganese and alkali contents higher than the allowable values. It is expected that manganese content predominantly MnO will reach more than 5% and this amount is expected to be doubled in the next few years. The sintering plant and blast furnance are subjected to excessive corrosion and scaffold formation on using sinter of high alkali content, and accordingly the productivity of both plants is mush lower than the designed capacity and the coke consumption is higher than the designed values. A high manganese content in the sinter leads to an increase in coke consumption in blast furnance (2-3%) for each 1% manganese, it also decreases the productivity of the blast furnance by (0.5-1.5%) and the splashes in oxygen converter which take place during steel making. Thus the aim of this work is concerned with the utilization of wastes of El-Dekhaila pellet fines with El-Baharia iron ore in the sintering process to minimize the manganese content in the produced sinter.