Dust emission reduction during metal casting

A metal or slag casting apparatus comprising

• an endless conveyor having a plurality of casting molds with upper open tops and which endless conveyor is arranged to move said casting molds in a first section from a casting station to a discharge station and in a second section back to the casting station,
• a dust control device for reducing dust emissions, the dust control device comprising a casing forming a bottomless box over a part of the first section of the endless conveyor located adjacent to the casting station, said casing having a top cover and peripheral sidewalls, wherein the peripheral sidewalls comprise, in the conveying direction of said casting molds in the first section, at least a front part, two lateral parts and a back part,
• a suction opening arranged in the top cover, the suction opening being operatively connectable to a gas and dust extractor,
• a plurality of blowing nozzles, each having an inlet and an outlet,
• wherein the outlet of each blowing nozzle is arranged within the casing,
• wherein the inlet of each blowing nozzle is operatively connectable to a pressurized gas supply,
• wherein the outlet of each blowing nozzle is arranged with an angle α with respect to the upper open tops of casting molds, said angle α being configured to blow off loose, solid particles formed at the surface of a metal, during early stages of cooling down and to start solidification of a superficial layer of metal or slag.