A laboratory-scale study was performed in order to investigate the effects that the addition of petroleum coke has on the texture and reactivity of the resultant metallurgical cokes. It was observed that the addition of petroleum coke to coking blends causes a reduction in the micropore volume and reactivity of metallurgical cokes. A relation between these two parameters was found, suggesting that the decrease in reactivity is a consequence of the decrease in surface area undergone by the metallurgical cokes obtained with petroleum coke addition. (C) 2002 Elsevier Science B.V. All rights reserved.