Details
Crucible Furnaces
Crucible furnaces are melting or holding furnaces in which the metal is contained within a separate or permanently installed crucible. They are used in die casting foundries, gravity die casting foundries, sand foundries and other metal-processing operations.
A crucible furnace consists of several thermally connected layers
The achievable performance does not depend on one component alone. The furnace housing, insulation, heating system, crucible and molten metal form one connected thermal system.
Tilting or ladling?
The method of metal removal influences the furnace construction, space requirements, control system and transfer to the downstream casting process.
In a tilting crucible furnace, the furnace housing and crucible are inclined in a controlled manner for metal removal. The molten metal flows through a defined pouring area into a ladle, launder or downstream transport system.
A stationary ladling furnace keeps the metal in a fixed position. Metal is removed manually or automatically using a ladle, dosing device or robot.
The crucible material must match the alloy and operating method
A technically suitable furnace can operate only with an appropriate crucible. Material, geometry, temperature changes, chemical exposure and mechanical loading must be considered together.
Holding capacity and melting performance are not the same
The crucible volume describes the possible metal content. The actual melting performance also depends on the heating system, charge material, temperature, heat losses and charging sequence.
The heating system determines the energy connection and heat transfer
The available infrastructure, required performance and operating method influence which heating system is technically and economically appropriate.
Which technical data determine suitability?
The manufacturer and year of manufacture provide only an initial classification. The actual configuration, operating condition and complete connection between the furnace, crucible, metal supply and casting process are decisive.
The crucible is a wear component with major process significance
The condition, installation and operating method of the crucible influence operational safety, heat transfer and metal quality. A replacement concept should therefore be defined before commissioning.
Technical inspection of a used crucible furnace
A meaningful condition assessment covers more than a functional test. The mechanical system, thermal condition, crucible support, control system, safety equipment and actual scope of supply should be documented.
Reuse begins before dismantling
Crucible furnaces are heavy and thermally stressed systems. Successful implementation requires all interfaces at both the previous and new locations to be documented.
Used crucible furnaces from various manufacturers
Depending on availability, the range may include stationary holding furnaces, combined melting and holding furnaces and tilting crucible furnaces with different heating systems and capacities.
Additional furnace equipment for metal supply and foundries
Crucible furnaces can be used as individual systems or as part of a larger metal supply system. Depending on production, additional melting, dosing or recycling equipment may be required.
FISS supports the search for a suitable crucible furnace and its technical assignment based on the alloy, application, holding capacity, melting performance, crucible material, heating system, metal removal method, installation and available energy supply. If no suitable furnace is currently listed, FISS can conduct a targeted search through its international network for an appropriate solution.
When selling equipment, FISS supports condition assessment, technical documentation, dismantling planning and international marketing of individual crucible furnaces and complete foundry systems. In addition to brokerage and international marketing, direct purchase by FISS may also be an option depending on the project.
