摘要:
A machine for manufacturing continuous bars of nonferrous metal by continuous casting includes a movable casting shell, composed of segments arranged in succession, each one having a portion defined, with a bottom and flanks, of the casting shell, and open on the sides directed toward the contiguous segments. The contiguous segments are movable along a closed path that has a substantially rectilinear portion at the casting region. Along the portion, the segments are substantially aligned and define a portion of the casting shell, with bottom and flanks, which is continuous, substantially rectilinear and closed, for at least one portion of the path downstream of the casting region, by a closure component.
摘要:
There is provided a twin-belt casting machine which prevents an uneven cooling condition between the top surface and the bottom surface of a slab between a pair of endless belts disposed vertically. The twin-belt casting machine 1 comprises a pair of rotating belt units 3 including respective endless belts 2 and arranged up and down so as to face each other, a cavity 4 formed between the pair of rotating belt units 3, and cooling means 10 which is arranged inside the rotating belt unit 3. The twin-belt casting machine 1 continuously casts a slab S as a metal liquid is supplied in the cavity 4. The twin-belt casting machine 1 further comprises distance adjusting means which is arranged inside at least one of the pair of rotating belt units arranged up and down so as to face each other, and which moves apart or closer the endless belt relative to the slab S in accordance with a part where the slab and the endless belt become distant from each other.
摘要:
A belt cooling and guiding apparatus for a casting belt of a twin belt caster. The cooling and guiding apparatus includes at least one nozzle having a support surface facing a reverse surface of the casting belt (a surface opposite to a casting surface in the casting mold), provided with a continuous slot in the support surface arranged transversely substantially completely across the casting belt. The slot allows for delivery of cooling liquid to the reverse surface of the belt in the form of a continuous film having uniform thickness and velocity of flow when considered in the transverse direction of the belt. This allows for even cooling transversely of the belt. The nozzle arrangement is also provided with a drainage opening for removal of cooling liquid downstream from the continuous slot, and a vacuum system associated with the drainage opening for applying suction to the drainage opening. One or more such cooling nozzles is provided at the entrance of the casting mold where uniform cooling is critical to the characteristics of the cast strip article.
摘要:
The method includes the start up parameters are inputted into a device which controls the caster. Molten metal is cast in a moving mold and cooled by extracting heat from the moving mold, which in turn extracts heat from the molten metal. Casting parameters are obtained for a casting cycle and sent to the device which controls the cooling of the metal being cast. Data from one cycle is compared to data from a previous cycle and the cooling of the metal being cast is automatically controlled in response to the comparison of data.
摘要:
A caster (1) has a casting ladle (2), a distribution device (4), and a horizontally moveable transport belt (5) having side limitation elements (13, 14) adjustable over the width of the horizontal transport belt. Liquid metal, preferably steel, can flow out of the casting ladle (2) into the distribution device (4), and from there can be fed to the horizontal transport belt (5)
摘要:
The invention relates to a casting device (1) having a casting ladle (2), a distribution device (4), and a horizontally moveable transport belt (5) having side boundaries (13, 14), wherein liquid metal, preferably steel, can flow out of the casting ladle (2) onto the distribution device (4), and from there can be applied to the horizontal transport belt (5), the side boundaries (13, 14) of the horizontal transport belt (5) being adjustable across the width of the horizontal transport belt. The invention further relates to a corresponding method.
摘要:
A method and apparatus for preparing and delivering various types of carbon and microalloy steel, free of oxygen with abundance of nuclei, when cast producing ultra fine grain steel free of internal defeats with excellent quality. A horizontal sealed table caster has a chamber, containing a suitable atmosphere for casting, with a tube connecting to a tundish so as to allow a liquid to flow into the chamber. The liquid metal is captured on a cooling belt along the bottom of the chamber and is maintained as a specific width and depth. The cooling belt serves as a heat sink causing the liquid metal to solidify from the bottom up, allowing inclusions to migrate to the surface of the steel. A layer of liquid metal is maintained on top of the solidifying steel until the solidification reaches the surface. The belt moves the solid metal toward the exit of the chamber. As the liquid metal solidifies, the impurities migrate in the liquid metal, reaching the surface and a solid metal body free of inclusions with the superior properties is produced.
摘要:
A process of casting a molten metal to form a cast metal strip ingot while controlling heat flux from the cast metal. The process comprises continuously supplying molten metal to a casting cavity formed between a pair of moving continuous casting surfaces that withdraw heat from the molten metal to cause metal solidification, and continuously withdrawing a resulting cast strip ingot from the casting cavity. A gas (e.g. air) containing water vapour substantially without liquid water (i.e. a moist gas) is supplied to the inlet of the casting cavity in a region containing the meniscus formed where the molten metal first contacts the casting surfaces. The moist gas has the effect of adjusting the heat withdrawal by the casting surfaces to minimize surface defects in the cast strip ingot and to avoid undesired distortion of the casting cavity. Furthermore, in those cases where a parting agent is applied to the casting surfaces, the amount of parting agent applied to the casting surfaces may be reduced. The invention also relates to equipment provided for the delivery and dewpoint control of the moist gas.