The Crucible Made of Silicon Carbide Graphite

Short Description:

High refractory resistance: The refractory resistance is as high as 1650-1665℃, suitable for high temperature environments.

High thermal conductivity: Excellent thermal conductivity ensures efficient heat transfer during the smelting process.
Low thermal expansion coefficient: The thermal expansion coefficient is small and can withstand rapid heating and cooling to avoid damage caused by temperature changes.
Corrosion resistance: Strong resistance to acid and alkali solutions, ensuring extended service life.

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Crucible Quality

Withstands Myriad Smelts

PRODUCT FEATURES

Superior Thermal Conductivity

The unique blend of silicon carbide and graphite ensures rapid and uniform heating, significantly cutting down on melting time.

Extreme Temperature Resistance

The unique blend of silicon carbide and graphite ensures rapid and uniform heating, significantly cutting down on melting time.

Durable Corrosion Resistance

The unique blend of silicon carbide and graphite ensures rapid and uniform heating, significantly cutting down on melting time.

TECHNICAL SPECIFICATIONS

Apparent porosity: 10-14%, ensuring high density and strength.
Bulk density: 1.9-2.1g/cm3, ensuring stable physical properties.
Carbon content: 45-48%, further enhancing heat resistance and wear resistance.

Model	No	H	OD	BD
CN210	570#	500	610	250
CN250	760#	630	615	250
CN300	802#	800	615	250
CN350	803#	900	615	250
CN400	950#	600	710	305
CN410	1250#	700	720	305
CN410H680	1200#	680	720	305
CN420H750	1400#	750	720	305
CN420H800	1450#	800	720	305
CN420	1460#	900	720	305
CN500	1550#	750	785	330
CN600	1800#	750	785	330
CN687H680	1900#	680	785	305
CN687H750	1950#	750	825	305
CN687	2100#	800	825	305
CN750	2500#	875	830	350
CN800	3000#	1000	880	350
CN900	3200#	1100	880	350
CN1100	3300#	1170	880	350

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PROCESS FLOW

1. Precision Formulation

High-purity graphite + premium silicon carbide + proprietary binding agent.

2.Isostatic Pressing

Density up to 2.2g/cm³ | Wall thickness tolerance ±0.3m

3.High-Temperature Sintering

SiC particle recrystallization forming 3D network structure

4. Surface Enhancement

Anti-oxidation coating → 3× improved corrosion resistance

5. Rigorous Quality Inspection

Unique tracking code for full lifecycle traceability

6. Safety Packaging

Shock-absorbent layer + Moisture barrier + Reinforced casing

PRODUCT APPLICATION

Gas Melting Furnace

Induction Melting Furnace

Resistance Melting Furnace

WHY CHOOSE US

The silicon carbide crucible produced by our company is an outstanding product in the modern metallurgical industry and has the following excellent properties:

High refractory resistance: The refractory resistance is as high as 1650-1665℃, suitable for high temperature environments.
High thermal conductivity: Excellent thermal conductivity ensures efficient heat transfer during the smelting process.
Low thermal expansion coefficient: The thermal expansion coefficient is small and can withstand rapid heating and cooling to avoid damage caused by temperature changes.
Corrosion resistance: Strong resistance to acid and alkali solutions, ensuring extended service life.

Application areas
Our silicon carbide energy-saving crucibles are widely used in:

Non-ferrous metals and alloy smelting: including gold, silver, copper, aluminum, lead, zinc, etc.
Non-ferrous metal casting and die-casting: especially suitable for the production of automobile and motorcycle aluminum alloy wheels, pistons, cylinder heads, copper alloy synchronizer rings and other parts.
Thermal insulation treatment: It plays an important role in thermal insulation during the casting and die-casting processes.

Service life
Used for smelting aluminum and aluminum alloys: service life of more than six months.
For melting copper: can be used hundreds of times, other metals are also very cost-effective.

Quality assurance
The silicon carbide energy-saving crucibles produced by our company have passed ISO9001 international quality system certification. The quality of our products is 3-5 times that of ordinary domestic crucibles, and it is more than 80% more cost-effective than imported crucibles.

Purchase and Service
We welcome users from domestic and foreign markets to contact us. We are dedicated to providing you with high-quality products and services and are committed to becoming a century-old brand.

Choosing our silicon carbide energy-saving crucible can not only improve production efficiency, but also effectively reduce costs, making it an ideal choice for the modern metallurgical industry. Our energy-saving crucibles, building a century-old brand, are your best choice.

FAQS

Q1: What are the advantages of silicon carbide graphite crucibles compared to traditional graphite crucibles?

✅ Higher Temperature Resistance: Can withstand 1800°C long-term and 2200°C short-term (vs. ≤1600°C for graphite).
✅ Longer Lifespan: 5x better thermal shock resistance, 3-5x longer average service life.
✅ Zero Contamination: No carbon penetration, ensuring molten metal purity.

Q2: Which metals can be melted in these crucibles?
▸ Common Metals: Aluminum, copper, zinc, gold, silver, etc.
▸ Reactive Metals: Lithium, sodium, calcium (requires Si₃N₄ coating).
▸ Refractory Metals: Tungsten, molybdenum, titanium (requires vacuum/inert gas).

Q3: Do new crucibles require pre-treatment before use?
Mandatory Baking: Slowly heat to 300°C → hold for 2 hours (removes residual moisture).
First Melt Recommendation: Melt a batch of scrap material first (forms a protective layer).

Q4: How to prevent crucible cracking?

Never charge cold material into a hot crucible (max ΔT < 400°C).

Cooling rate after melting < 200°C/hour.

Use dedicated crucible tongs (avoid mechanical impact).

Q5: How to prevent crucible cracking?

Never charge cold material into a hot crucible (max ΔT < 400°C).

Cooling rate after melting < 200°C/hour.

Use dedicated crucible tongs (avoid mechanical impact).

Q6: What is the minimum order quantity (MOQ)?

Standard Models: 1 piece (samples available).

Custom Designs: 10 pieces (CAD drawings required).

Q7: What is the lead time?
⏳ In-Stock Items: Ships within 48 hours.
⏳ Custom Orders: 15-25 days for production and 20 days for mould.