Mill scale is very attractive industrial waste due to its richness in iron (about = 72% Fe). In this paper, the characterizations of mill scale were studied by different methods of analyses. The produced mill scale briquettes were reduced with hydrogen at varying temperatures, and the reduction kinetics was determined. Two models were applied and the energy of activation was calculated.

Mill scale is very attractive industrial waste since it is rich in iron (about = 72 % Fe) and it is suiTab. for direct recycling to the blast furnace via sintering plant. In this paper the characterizations of raw materials were studied by different methods of analyses. The produced briquettes were reduced with different amounts of hydrogen at varying temperatures, and the reduction kinetics was determined. Two models were applied and the energy of activation was calculated.

Ilmenite ore fine and coke breeze as reduced material briquetted with different amounts of organic materials such as molasses or pitch were studied in this investigation. The produced briquettes in reasonable conditions were reduced in a nitrogen atmosphere at a temperature range of 800Á11008C to determine the factors controlling the reduction and to determine the controlling mechanism. Also ilmenite ore fines with coke breeze were reduced at the same temperature range in a nitrogen atmosphere without the briquetting process, for comparison.

In the present paper, the roasting of soda ash and rosetta ilmenite ore concentrate briquette in the temperature range of 700-900°C was investigated and the kinetics of formation of sodium titanate was studied. The kinetics of roasting of ilmenite with (35%) soda ash briquettes showed that the reaction is diffusion-controlled and the energy of activation is 135 kJ/mol.

Alkaline metals and hydrogen titanates are of great interest for possible applications. The soda ash and Rosetta ilmenite ore concentrate briquette were investigated. The kinetic of formation of sodium titanate was studied in the temperature range 700?C to 900?C.