In the processes of melting alloys and processing high temperature metals, The nozzle is a very small but extremely crucial component. It comes into direct contact with molten metal and is constantly exposed to high temperatures and thermal shock conditions.
We have launched boron nitride nozzles, the purpose is very clear: Make the molten metal flow more stably and make the process more controllable.
Boron nitride is a well established ceramic material for high temperature applications. In molten alloy environments it offers several practical advantages:
– Very low wetting by molten metals
– Chemically stable at elevated temperatures
– Good thermal shock resistance
– Minimal dimensional change at high temperature
Comparison with Common Nozzle Materials：
Nozzles made of alumina, aluminum nitride and graphite materials have been widely used in the industry. But in the case of melting and alloying operations, each of these materials has certain limitations.
– Alumina nozzle has high hardness, but the molten metal is prone to adhere to it. Over time, the flow channel may change.
– Aluminum nitride nozzles have excellent heat conduction properties, but they are sensitive to the environment and usage conditions.
– Graphite nozzles are heat resistant and easy to process, but it has the risks of oxidation, particle shedding and carbon pollution.
In comparison, boron nitride provides a better balance between non wetting behavior, chemical stability and cleanliness, making it well suited for direct contact with molten metal.
In actual production, how the metal flows out of the mold often directly affects the subsequent forming quality. The stability and surface condition of the nozzle structure is of crucial importance.
Boron nitride nozzle maintains its structural integrity at high temperatures and can withstand frequent heating, cooling and start stop processes. The flow is more stable and the process parameters are easier to repeat.
Boron nitride nozzles are suitable for a wide range of molten alloys, including:
– Aluminum based alloys
– Copper based alloys
– Precious metal alloys
– Special alloys for laboratory and research purposes.
The size, aperture and structural form of the nozzle can be customized according to the requirements of the equipment and the process.
Boron nitride nozzle is not intended to replace all materials, but rather provide a more reliable option for processes that have higher requirements for stability, cleanliness and long term consistency.
If your process involves direct contact with molten metal and is sensitive to changes in the nozzle condition, boron nitride nozzles are worth considering for the selection process.
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