A molten aluminum launder is a refractory-lined channel used to safely transport molten aluminum from a furnace, holding furnace, or melting unit to downstream processing equipment such as a casting machine, filtration system, or degassing unit.
Unlike ordinary metal channels, molten aluminum launders are designed to withstand high temperatures, thermal shock, aluminum corrosion, and continuous molten-metal flow. A properly designed launder helps maintain stable metal flow while minimizing heat loss, turbulence, oxidation, and aluminum buildup.
During aluminum casting, molten aluminum flows through the launder from the furnace or holding furnace toward the next stage of the production line. Depending on the process, the launder can be integrated with online degassing and filtration systems to improve molten metal cleanliness before casting.
A typical aluminum melt transfer system may include:
Holding Furnace → Molten Aluminum Launder → Degassing → Filtration → Casting
The launder design, length, cross-section, refractory lining, heating system, and flow control all affect molten aluminum temperature and metal quality.
Poorly designed launders can cause excessive temperature loss, turbulence, oxide formation, aluminum buildup, and unstable metal flow. For high-quality aluminum casting, the launder should be designed according to the alloy, production capacity, metal temperature, flow rate, plant layout, and downstream equipment.
Longzhyi provides customized molten aluminum handling and melt treatment solutions for aluminum foundries and processing plants. We can design and manufacture molten aluminum launders, online degassing systems, and filtration equipment according to your production requirements and existing plant layout.
From process design and equipment manufacturing to installation and commissioning, Longzhyi helps aluminum producers build a more stable, efficient, and reliable molten aluminum treatment system.
