Abstract

The reducibility of Al-Hussainiyat pisolitic iron ore with coke and some alkali carbonate additives was investigated. The variable parameters studied are: temperature, time and type and amounts of alkali additives. Initially a precalcined ore of particle size range (–850 +177) micron mixed with coke (–75) micron was reduced in the temperature range (850 – 1000)° C at variable time (60 – 150) minutes. The effect of alkali carbonates (Na2CO3, K2CO3 and CaCO3) on reducibility was next studied at the same temperature conditions above for (150) minutes. Reduction time and the amount of additive in the coke ore mixture was varied (1 – 5) % of the ore weight.The experimental results show that, reduction temperature, reduction time and additive amount substantially influence the reducibility and higher degree of reduction was accordingly yielded. The best results were obtained at 5% additive at 1000°C .The effect of additives was found in the following order: CaCO3 > K2CO3 > Na2CO3.

The article was added to IASJ on 2012-10-23

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