Abstract:
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).
Abstract:
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).
Abstract:
Fil fourré (1; 100) destiné à être introduit dans un bain de métal en fusion pour réaliser un traitement métallurgique, le fil fourré comprenant : un garnissage (2) s'étendant localement selon un axe longitudinal (L), le garnissage comportant au moins une substance active pour traiter le métal en fusion; et une enveloppe externe (4) longitudinalement autour du garnissage; caractérisé en ce que le garnissage comprend : un barreau extrudé (8) s'étendant longitudinalement et comportant la substance active; et une couche intermédiaire (10) s'étendant longitudinalement entre le barreau extrudé et l'enveloppe externe et comprenant une poudre comportant un ou plusieurs parmi : un métal, un mélange de métaux, un oxyde métallique, un mélange d'oxydes métallique. Procédé correspondant.
Abstract:
The invention relates to iron and tungsten containing pellets and a process for producing the pellets. A green pellet is produced from mixing an iron powder, a tungsten containing powder, and pelletizing the mixture.
Abstract:
The invention relates to a method for improving the reduction degree of metal components in a chromite concentrate when smelting ferroalloy suitable for manufacturing of stainless steel. The chromite concentrate is fed together with nickel-containing raw material so that by means the amount of nickel-containing raw material it is achieved a desired reduction degree for the metal components of ferroalloy.
Abstract:
본 발명은 주철에 대한 것으로서, 보다 상세하게는 탄소(C), 규소(Si), 망간(Mn), 구리(Cu), 주석(Sn) 및 마그네슘(Mg) 량을 제어하여 제조됨으로써, 주조성이 향상되고, 아울러 안정적인 인장강도와 항복강도를 가지며 적절한 범위의 경도를 가지는 CGI(Compacted Graphite Iron) 주철과 그 제조방법에 대한 것이다.
Abstract:
The invention relates to a process for producing an iron-and/or tungsten containing powder or powder agglomerate including the steps of: a) mixing at least a first powder fraction comprising a tungsten carbide containing powder, and at least a second powder fraction comprising an iron oxide powder and/or a tungsten oxide containing powder and optionally an iron powder, the weight of the first fraction being in the range of 50-90 % by weight of the mix and the weight of the second fraction being in the range of 10-50 % by weight of the mix, b) heating the mix of step a) to a temperature in the range of 400-1300°C, preferably 1000-1200 °C. The invention also relates to an iron-and/or tungsten containing powder or powder agglomerate.
Abstract:
A cored reactive metal wire is formed by gathering at least three strands of continuously fed elongated reactive metal wires into a bundle and aligning the bundle of wires with a continuously fed sheet of metal sheath. The bundle of wires is then compacted into a generally cylindrical shape and clad with the sheet of metal sheath whereby the compacted bundle of reactive metal wires form a core of the cored wire in which the core has a substantially larger diameter than each of the strands of continuously fed elongated reactive metal wires.