Calcium Carbide Stone 50–80 Mm (295 L/Kg Min): Grade, Specifications And Industrial Applications
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Calcium Carbide Stone 50–80 mm (295 L/kg Min): Grade, Specifications and Industrial Applications
1. Product Overview
Calcium carbide stone (CaC₂) is an industrial calcium carbide product manufactured by the high-temperature reaction of quicklime (CaO) and carbon materials (such as coke) in an electric arc furnace.
After smelting, the molten carbide is cooled and crushed into solid gray-black crystalline lumps. The 50–80 mm calcium carbide stone grade is widely selected for industrial acetylene generation because it provides a practical balance between:
Acetylene gas production efficiency
Reaction control
Mechanical strength
Transportation and storage performance
The larger lump size reduces dust generation during handling and is suitable for continuous industrial operations requiring stable carbide feeding.
2. Typical Specifications of Calcium Carbide Stone 50–80mm
| Parameter | Specification |
|---|---|
| Product Name | Calcium Carbide Stone |
| Chemical Formula | CaC₂ |
| Size Range | 50–80 mm |
| Size Distribution | ≥95% within specified range |
| Acetylene Gas Yield | ≥295 L/kg |
| Test Standard | GB 10665 |
| Calcium Carbide Content | ≥93% Industrial Grade |
| High-Purity Grade | ≥96% CaC₂ available |
| Sulfur (S) | ≤0.20% |
| Phosphorus (P) | ≤0.15% |
| Moisture | ≤0.50% |
| Ash Content | ≤3.0% |
| Appearance | Gray-black crystalline lumps |
Gas Yield Classification:
According to GB 10665, industrial calcium carbide is commonly classified by acetylene gas yield grades, including 295 L/kg, 285 L/kg, 275 L/kg and 255 L/kg. Actual performance depends on CaC₂ content, impurity levels, and batch test results.
Each shipment should be verified through a Certificate of Analysis (COA).
3. Why Choose 50–80mm Calcium Carbide Stone?
3.1 Stable Acetylene Generation
The 50–80 mm lump size provides a controlled reaction rate when calcium carbide contacts water.
Compared with smaller particles:
Reaction speed is easier to manage
Gas generation is more consistent
Material consumption can be better controlled
This makes it suitable for industrial acetylene generators operating continuously.
3.2 Lower Fines and Better Handling Performance
Large carbide lumps have better mechanical strength during:
Long-distance transportation
Loading and unloading
Warehouse storage
Lower fines generation helps reduce material loss and improves feeding efficiency.
3.3 Suitable for Industrial Equipment
The 50–80 mm size is commonly used in:
Large acetylene generators
Chemical production systems
Industrial gas generation equipment
Different particle sizes can be supplied according to customer equipment requirements.
4. Industrial Applications of Calcium Carbide Stone
4.1 Chemical Manufacturing
The primary application of calcium carbide is acetylene production.
The chemical reaction is:
CaC₂ + 2H₂O → C₂H₂ + Ca(OH)₂
The generated acetylene is used as a raw material for:
Vinyl chloride monomer (VCM)
PVC production
Organic chemical synthesis
Synthetic materials manufacturing
Stable gas yield helps maintain consistent operation in continuous chemical processes.
4.2 Steelmaking and Metallurgical Treatment
Calcium carbide is used in metallurgical applications as a reducing agent and desulfurization material.
Typical functions include:
Reducing sulfur content in molten steel
Supporting cleaner steel production
Improving process control during ladle treatment
For steel plants, important purchasing factors include:
CaC₂ content
Gas yield
Sulfur and phosphorus levels
Lump size consistency
4.3 Welding and Cutting Applications
Calcium carbide-generated acetylene is used in oxy-acetylene equipment for:
Steel plate cutting
Pipeline maintenance
Shipyard repair
Industrial welding operations
The 50–80 mm size offers stable gas generation for heavy-duty applications.
5. Quality Control and Documentation
For international procurement, calcium carbide stone should be supplied with complete quality documentation.
Typical inspection items include:
| Test Item | Purpose |
|---|---|
| CaC₂ Content | Determines grade level |
| Acetylene Yield | Evaluates gas production capability |
| Particle Size | Confirms equipment compatibility |
| Sulfur & Phosphorus | Controls impurities |
| Moisture | Ensures storage stability |
Available documents:
Certificate of Analysis (COA)
Safety Data Sheet (SDS)
Product specification sheet
Third-party inspection report (if required)
6. Packaging, Logistics and Storage
Packaging Options
Common export packaging:
50 kg moisture-proof steel drums
1-ton sealed bulk bags
Customized bulk packaging for large-volume orders
Packaging should prevent moisture exposure because calcium carbide reacts with water and releases flammable acetylene gas.
Transportation Requirements
Calcium carbide is classified as a water-reactive hazardous material.
Export shipments require:
Moisture-resistant packaging
Proper dangerous goods handling
Compliance with applicable transportation regulations
Storage Recommendations
Recommended storage conditions:
Dry and well-ventilated warehouse
Relative humidity preferably below 50%
Keep away from water, acids, and heat sources
Use appropriate personal protective equipment during handling
7. Calcium Carbide Stone 50–80mm Pricing Factors
Calcium carbide pricing depends on multiple factors, including:
| Factor | Impact |
|---|---|
| CaC₂ Grade | Higher purity generally increases value |
| Gas Yield | 295 L/kg grade has higher performance requirements |
| Particle Size | Customized sizes may affect processing cost |
| Packaging | Drums, bulk bags, and special packaging differ in cost |
| Order Volume | Bulk quantities influence export pricing |
For accurate quotations, buyers should provide:
Required CaC₂ grade
Gas yield requirement
Particle size
Packaging method
Destination port
Annual or order volume
FAQ About Calcium Carbide Stone 50–80mm
1. What is calcium carbide stone?
Calcium carbide stone is a solid lump form of calcium carbide (CaC₂) produced through electric furnace smelting of lime and carbon materials.
2. What does 295 L/kg calcium carbide mean?
It means one kilogram of calcium carbide can generate at least 295 liters of acetylene gas under specified testing conditions.
3. Why is 50–80mm calcium carbide preferred for industrial use?
The size provides a balance between reaction control, low fines generation, and compatibility with industrial carbide generators.
4. What grades of calcium carbide are available?
Common gas-yield grades include 295 L/kg, 285 L/kg, 275 L/kg and 255 L/kg, with different CaC₂ contents and impurity levels.
5. What documents are required for calcium carbide import?
International buyers usually require:
COA
SDS
Product specification sheet
Packing information
Shipping compliance documents
One-stop Calcium Carbide Factory in China
For Calcium Carbide Stone 50–80mm (295 L/kg Min) specifications, quotation and export supply, please contact:
WhatsApp: +86 15518824805
Email: info@zaferroalloy.com
