In this paper, a study of processing pyrite cinder and metallurgical slag using a ‘one step’ technology in strand grate–rotary kiln at a laboratory scale is presented, which aims to recover iron, lead, zinc and copper. The compressive strength of preheated pellets reached 527 N per pellet and the removal rates of copper, lead and zinc reached 36·36, 92·86 and 20·0% respectively, when the green balls were preheated at 1125°C for 10 min. Reduction of preheated pellets was followed, at the carbon/iron ratio of 3·0 and 1100°C, for the reduction time of 70 min, and the metallisation degree of 86·31%, the compressive strength of 1777 N per pellet and the copper, lead and zinc removal rates of 36·36, 99·12 and 71·00% were achieved respectively. These prereduced pellets with 80·58%Fe made from pyrite cinder and metallurgical slag can be widely applied to enhance the operation of blast furnace.
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