<p>In a system (1) for preheating feedstock such as, for example, scrap for a steel converter (2), the heat of the waste gas released in the steel converter (2) is used for preheating. The apparatus (1) comprises a number of preheating units (5) which temporarily receive the feedstock. The preheating units (5) are interconnected with the aid of connecting lines (15), so that the waste gas flows successively through the units (5) to preheat the feedstock. <IMAGE></p>
