In a charging material preheater for preheating charging material (60) which is to be charged into a furnace vessel (3), having a shaft (9) which is fixed in a frame structure (20) and which in its upper region has a closeable feed opening (61) for the charging material (60) and a gas outlet and in its lower region a discharge opening for the charging material (60) and a gas inlet, and whose shaft walls (33, 35) delimit a receiving space (62) for the charging material (60) to be heated, the shaft walls (34,35) are subdivided into shaft wall portions which are individually replaceably fixed in the frame structure (20).

En un precalentador material de carga para el material de carga del precalientamiento (60) que debe ser cargado en un recipiente del horno (3), teniendo un eje (9) que esté fijado en una estructura del marco (20) y que en su región superior tenga una abertura closeable de la alimentación (61) para el material de carga (60) y un enchufe del gas y en su región más baja una abertura de la descarga para el material de carga (60) y una entrada del gas, y que paredes del eje (33, 35) delimite un espacio de recepción (62) para el material de carga (60) que se calentará, las paredes del eje (34.35) se subdividen en las porciones de la pared del eje que replaceably están fijadas individualmente en la estructura del marco (20)

 
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