Feed Casting Nozzle | Adtech China

17 de diciembre Boquilla de fundición de alimentador

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Boquilla de fundición de alimentador is a key component of the aluminum strip continuous casting and rolling mill, and its quality directly affects the quality of the strip and the yield of production.
It includes a feed port with a narrow rear end and a feed port with a wider front end. In the material passage between the feed port and the discharge port, a partition block divides the material passage into two side-by-side parts.

The liquid impurities in the aluminum alloy melt that contact the surface of the casting nozzle precipitate and solidify with the decrease of temperature, resulting in an increase in the surface roughness of the casting nozzle and causing slagging of the casting nozzle.
At high temperatures, the aluminum melt is in contact with the SiO2 particles in the nozzle material for a long time, and Al2O3 particles are formed on the surface of the nozzle, which aggravates the occurrence of nozzle blockage.
The molten aluminum is easy to solidify on the uneven surface of the nozzle, and the cavity of the nozzle gradually becomes narrow, which eventually causes the nozzle to block.
A three-layer structure is formed in the blocked nozzle cavity, a reaction layer, a slag layer and a metal layer are distributed.

Feed Casting Nozzle internal fluid
Near the center of the cavity, the flow rate is fast and the flow is relatively stable.
Near the wall of the cavity, the flow rate is slow and steady.
In the middle part, the flow rate is moderate but the flow state is complex and changeable.

The casting speed, the width of the casting plate and the surface roughness of the nozzle cavity have a significant influence on the flow of the melt in the nozzle cavity.
Con el aumento continuo de la velocidad de colada, el estado turbulento del flujo de metal fundido en la cavidad también se vuelve más complejo.
A medida que aumenta la anchura de colada, se acentúa la diferencia de velocidad entre el borde de la salida de la boquilla y el centro de la salida.
Con el aumento continuo de la rugosidad superficial de la cavidad de la tobera, el flujo liso en la zona próxima a la pared se interrumpe y da paso a una turbulencia compleja, lo que agrava el fenómeno de la formación de escoria.

Aluminum coil production process
The aluminum ingot is put into the melting furnace, burned and melted with natural gas, slagging and waste removal, alloy configuration, guide furnace to the holding furnace, aluminum water, passing through the die nozzle, rolling cast coil, rolling cold rolled coil, annealing, cross shear To the required size, engrave according to the drawings, hemming, reinforcement, welding, polishing, spraying, inspection, sticking protective film, air cushion film, packing, loading and shipping. The performance of aluminum coil: if used for exterior wall decoration, generally use 2mm, 2.5mm, 3mm thick aluminum coil, reinforced ribs and corners can be fixed on the keel, the exterior wall decoration is firm and reliable, and the metal texture is strong. Spray weather-resistant coatings will not change or fade within 20 years, and keep the color bright.