| 摘要 |
In this immersion and vaporization fondery chamber, there is provided in the lower third portion on the side of the handling container as well as in the two upper thirds of the inner wall, an opening. The number, the size and the cross section of the openings are selected so that the total cross section Qu of the opening or openings of the lower third is equal or smaller than the total cross section area Qo of the opening or openings of the two upper thirds. According to a form of execution, the ratio Qo/Qu is at least equal to 2. The application of this chamber is characterized by the incorporation of vaporisable additives in the cast-iron, particularly pure magnesium in a handling container containing puddle bar, cast-iron or steel. The process is appropriate for the disulphurization and/or the production of vermiculated or spheroidal graphite cast-iron and malleable cast-iron. |
