US 2014/0331515 A1 · DUST EMISSION REDUCTION DURING METAL CASTING

Abstract

A method for reducing dust emissions in a metal or slag casting apparatus, as well as a metal or slag casting apparatus allowing reducing dust emissions, comprising an endless conveyor having a plurality of casting moulds with upper open tops and which endless conveyor is arranged to move said casting moulds in a first section from a casting station to to the casting station, the method comprising (a) providing a casing forming a bottomless box over at least part of the first section of the endless conveyor, (b) injecting within said casing a gas on the surface of the mould with an angle sufficient to blow off loose, solid particles, such as graphite flakes, formed at the surface of the metal, during early stages of the cooling down and to start the solidification of a superficial layer of metal or slag, (c) extracting the gas and the solid particles by suction from within said casing.

Claims18

Dependent claims

A method for reducing dust emissions in a metal or slag casting apparatus comprising an endless conveyor (3) having a plurality of casting moulds (31) with upper open tops and which endless conveyor (3) is arranged to move said casting moulds in a first section from a casting station to a discharge station and in a second section back to the casting station, wherein the method comprises the steps of

(a) providing a casing forming a bottomless box over a part of the first section of the endless conveyor located adjacent to the casting station,
(b) injecting within said casing a gas on a surface of the casting mold with an angle α sufficient to blow off loose, solid particles, formed at the surface of the metal, during early stages of cooling down and to start solidification of a superficial layer of metal or slag,
(c) extracting the gas and the solid particles by suction from within said casing.

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 moulds 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 side-walls comprise, in the conveying direction of said casting moulds in the first section, at least a front part (2121), two lateral parts (2122, 2123) and a back part (2124),
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 moulds, said angle α being sufficient to blow off loose, solid particles, formed at the surface of the metal, during early stages of cooling down and to start solidification of a superficial layer of metal or slag.

4 more elements

Dependencies are inferred from the claim text.

Dust emission reduction during metal casting

Life of this patent

Dust emission reduction during metal casting

Life of this patent

Abstract

Claims18