

GMG Purmelt is an advanced crucible specially developed for high-purity aluminum holding applications. Adopting isostatic pressing technology and high-performance glaze coating, it delivers enhanced service life and overall performance. Manufactured from clay-bonded composite materials via isostatic pressing, the crucible features outstanding mechanical strength and stable long-term thermal conductivity. Its premium surface coating effectively reduces slag adhesion, minimizes impurities in molten metal during holding processes and lowers contamination risks.
DetailKey Benefits
✔Longer service life and superior oxidation resistance
✔Excellent thermal conductivity and thermal shock resistance
✔Reduced adhesion and contamination for higher metal purity
✔High mechanical strength and good erosion resistance.
Application & Specifications
✔Application: Holding and transferring high-purity aluminum
✔Operating Temperature: 700℃ - 1000℃
✔Appearance: Equipped with blue low-temperature protective coating for easy identification
✔Model Compatibility: Compatible with mainstream GMG crucible models
✔Customization: Optional thermocouple pocket; customized spouts in various shapes and sizes available
Heating recommendations for Clay Graphite Crucibles
The crucible, after being installed in the furnace should be heated up slowly to a temperature of 200°C (392°F) over a period of 2 hours, to eliminate any moisture that may be present.
Next, these crucibles should be heated up to a temperature of 600°C (1112°F) on low power, before the full heating rate is used to reach 950°C (1742°F).
Clay Graphite crucibles used in a melting operation can be continuously heated up on full power until working temperature is reached. The crucible is then ready to be charged with care.
When using Clay Graphite crucibles for holding, the temperature of 950°C (1742°F) should be reached and held for approximately 1 hour. This ensures even melting of the glaze with the additional antioxidation coating, which is essential to achieve the maximum possible crucible life.

Suzhou GMG Advanced Materials Co., Ltd
Hotline:400-668-3908
Email:info@gmgam.com
Address:Room 2303, Zhongxin Ecological Building, No.2 Keying Road, SIP, Suzhou
Postal Code:215000