SPREADING DEVICE FOR BULK MATERIAL ON A CIRCULAR SURFACE AND METHOD FOR OPERATING THE SAME

摘要

A spreading device (10) for the spreading of bulk material on a circular surface comprises a distribution plate (12) mounted about a central shaft (14); at least one radially extending slit (16) arranged in the distribution plate (12); and a scraper device (24) for spreading the bulk material over the length of the slit (16). The bulk material is preferably granular or powdered covering material to be deposited as an insulation layer on the top layer of a casting mould containing molten steel or metal. According to the present invention, a rectangular distribution trough (22) mounted on the distribution plate (12), the slit (16) being arranged within the distribution trough (22). Furthermore, a feed pipe (30) is arranged so as to feed bulk material into the distribution trough (22) onto an area corresponding to the rotational centre (18) of the distribution plate. The slit (16) extends from the rotational centre (18) of the distribution plate (12) to the edge (20) thereof. Finally, the scraper device (24) comprises at least one linearly displaceable scraper (28) arranged within the distribution trough (22) so as to feed the bulk material through the distribution trough (22) radially outwards from the rotational centre (18) of the distribution plate (12). The invention also relates to a method for applying a homogeneous layer of material onto a circular surface by using such a spreading device (10).

主权项

1. A spreading device for spreading of a bulk material on a circular surface, in particular of a granular or powdered covering material on a top layer of a casting mold containing molten steel or metal, said spreading device comprising:
a distribution plate rotatably mounted about a central shaft; at least one radially extending slit arranged in said distribution plate ; a scraper device for spreading said bulk material over a length of said slit; a rectangular distribution trough mounted on said distribution plate, said slit being arranged within said distribution trough; a feed pipe arranged so as to feed bulk material into said distribution trough onto an area corresponding to a rotational center of said distribution plate; wherein said slit extends from the rotational center of said distribution plate to the edge thereof; and wherein said scraper device comprises at least one linearly displaceable scraper arranged within said distribution trough so as to feed said bulk material through said distribution trough radially outwards from said area corresponding to the rotational center of said distribution plate.