Clay Crucibles are meticulously designed to meet the rigorous demands of modern fire assay and high-temperature metallurgical operations. It is mainly used in the analysis of metal samples and melting samples in laboratories, mineral laboratories and various industrial laboratories
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Clay Crucibles are meticulously designed to meet the rigorous demands of modern fire assay and high-temperature metallurgical operations. It is mainly used in the analysis of metal samples and melting samples in laboratories, mineral laboratories and various industrial laboratories
Hengtong clay crucibles are also known as assay crucibles.Clay Crucibles are meticulously designed to meet the rigorous demands of modern fire assay and high-temperature metallurgical operations.Using high-quality materials, high temperature resistance, good thermal conductivity, high melting purity, strong corrosion resistance and long service life.
Hengtong Clay Crucible of Key Advantages:
u Designed for fire assay and metallurgical melting.
u Reusable 5 to 9+ times.
u Withstands severe thermal shock up to 1650°C.
u Endures corrosive environments and temperature fluctuations.
u Ensures consistent crucible size.
u Provides excellent heat conduction.
u Non-reactive material ensures sample purity.
u Full-process quality control.
u Guaranteed no lead sputtering or structural damage after repeated use.
u Available in standard sizes (30g to 65g).
u Customization options available.
Key Chemical Composition
Silica(SiO₂) | 50%~55% |
Aluminum Oxide(Al₂O₃) | 40%~45% |
Calcium Oxide | ＜0.5% |
Ferric Oxide (Fe₂O₃) | ＜2% |
Titanium Oxide (TiO₂) | ＜1% |
Max.Temperature | 1600C |
Technical Parameters of Conventional
Model | Top OD(mm） | Base OD（mm) | Height（mm） |
HT-1 | 76 | 46 | 98 |
HT-2 | 85 | 56 | 105 |
HT-3 | 90 | 56 | 135 |
HT-4 | 105 | 56 | 150 |
HT-5 | 90 | 56 | 155 |
HT-6 | 105 | 56 | 165 |
HT-7 | 120 | 75 | 160 |
HT-8 | 110 | 60 | 200 |
HT-9 | 125 | 61 | 210 |
HT-10 | 105 | 56 | 130 |
HT-11 | 110 | 70 | 130 |
HT-12 | 88 | 55 | 135 |
HT-13 | 95 | 56 | 140 |
HT-14 | 95 | 55 | 159 |
HT-15 | 105 | 58 | 148 |
HT-16 | 105 | 58 | 134 |
HT-17 | 88 | 57 | 155 |
HT-18 | 105 | 57 | 155 |
HT-19 | 105 | 55 | 165 |
HT-20 | 114 | 79 | 152 |
HT-21 | 120 | 75 | 160 |
HT-22 | 124 | 73 | 178 |
Customizable for different types of crucibles accoroding your drawing and requires | |||
Production Process
1. Raw Material Preparation:
l High-purity raw materials (fire clay, kaolin, additives) are carefully selected.
l Materials are ball milled to achieve specific particle size granulation. Combining different particle sizes (coarser for strength, finer for density) is essential for optimal thermal shock resistance and a dense structure.
l The raw materials are thoroughly blended in precise proportions to create a homogeneous mix.
2. Forming:
The prepared clay mixture is formed into the desired crucible shape. Common methods include:
ü Curing and Pressing (Stamping Forming): This method utilizes immense pressure from automated machinery to create a dense, high-strength body and ensure consistent sizing.
ü Roll Forming (Plastic Forming): This involves shaping the clay on a rolling mechanism.
3. Drying:
Crucibles are left to dry slowly for several hours. This critical step prevents cracking caused by rapid water evaporation. Controlled drying ensures the crucible is completely dry before firing.
4. Firing (Sintering):
ü Dried crucibles are placed in a high-temperature kiln (typically heated to around 1000°C to 1650°C, depending on the desired properties and materials).
ü The firing process is carefully controlled with a slow heating rate, holding at certain temperatures (biscuit firing), and a slow cooling rate to prevent cracking and achieve optimal strength and durability.
5. Quality Control:
Throughout the production, strict quality control measures are implemented, including visual inspections, dimensional checks, and performance testing.
Clay Crucibles are meticulously designed to meet the rigorous demands of modern fire assay and high-temperature metallurgical operations. It is mainly used in the analysis of metal samples and melting samples in laboratories, mineral laboratories and various industrial laboratories
Hengtong clay crucibles are also known as assay crucibles.Clay Crucibles are meticulously designed to meet the rigorous demands of modern fire assay and high-temperature metallurgical operations.Using high-quality materials, high temperature resistance, good thermal conductivity, high melting purity, strong corrosion resistance and long service life.
Hengtong Clay Crucible of Key Advantages:
u Designed for fire assay and metallurgical melting.
u Reusable 5 to 9+ times.
u Withstands severe thermal shock up to 1650°C.
u Endures corrosive environments and temperature fluctuations.
u Ensures consistent crucible size.
u Provides excellent heat conduction.
u Non-reactive material ensures sample purity.
u Full-process quality control.
u Guaranteed no lead sputtering or structural damage after repeated use.
u Available in standard sizes (30g to 65g).
u Customization options available.
Key Chemical Composition
Silica(SiO₂) | 50%~55% |
Aluminum Oxide(Al₂O₃) | 40%~45% |
Calcium Oxide | ＜0.5% |
Ferric Oxide (Fe₂O₃) | ＜2% |
Titanium Oxide (TiO₂) | ＜1% |
Max.Temperature | 1600C |
Technical Parameters of Conventional
Model | Top OD(mm） | Base OD（mm) | Height（mm） |
HT-1 | 76 | 46 | 98 |
HT-2 | 85 | 56 | 105 |
HT-3 | 90 | 56 | 135 |
HT-4 | 105 | 56 | 150 |
HT-5 | 90 | 56 | 155 |
HT-6 | 105 | 56 | 165 |
HT-7 | 120 | 75 | 160 |
HT-8 | 110 | 60 | 200 |
HT-9 | 125 | 61 | 210 |
HT-10 | 105 | 56 | 130 |
HT-11 | 110 | 70 | 130 |
HT-12 | 88 | 55 | 135 |
HT-13 | 95 | 56 | 140 |
HT-14 | 95 | 55 | 159 |
HT-15 | 105 | 58 | 148 |
HT-16 | 105 | 58 | 134 |
HT-17 | 88 | 57 | 155 |
HT-18 | 105 | 57 | 155 |
HT-19 | 105 | 55 | 165 |
HT-20 | 114 | 79 | 152 |
HT-21 | 120 | 75 | 160 |
HT-22 | 124 | 73 | 178 |
Customizable for different types of crucibles accoroding your drawing and requires | |||
Production Process
1. Raw Material Preparation:
l High-purity raw materials (fire clay, kaolin, additives) are carefully selected.
l Materials are ball milled to achieve specific particle size granulation. Combining different particle sizes (coarser for strength, finer for density) is essential for optimal thermal shock resistance and a dense structure.
l The raw materials are thoroughly blended in precise proportions to create a homogeneous mix.
2. Forming:
The prepared clay mixture is formed into the desired crucible shape. Common methods include:
ü Curing and Pressing (Stamping Forming): This method utilizes immense pressure from automated machinery to create a dense, high-strength body and ensure consistent sizing.
ü Roll Forming (Plastic Forming): This involves shaping the clay on a rolling mechanism.
3. Drying:
Crucibles are left to dry slowly for several hours. This critical step prevents cracking caused by rapid water evaporation. Controlled drying ensures the crucible is completely dry before firing.
4. Firing (Sintering):
ü Dried crucibles are placed in a high-temperature kiln (typically heated to around 1000°C to 1650°C, depending on the desired properties and materials).
ü The firing process is carefully controlled with a slow heating rate, holding at certain temperatures (biscuit firing), and a slow cooling rate to prevent cracking and achieve optimal strength and durability.
5. Quality Control:
Throughout the production, strict quality control measures are implemented, including visual inspections, dimensional checks, and performance testing.
