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Calcium Carbide 50-80mm: Gas Yield, Specifications, Applications and Buying Guide

1. Product Overview

Calcium carbide (CaC₂) 50-80mm is an industrial-grade calcium carbide lump product mainly used for acetylene production, steel desulfurization and chemical applications.

The larger lump size provides a controlled reaction speed when calcium carbide reacts with water, making it suitable for continuous acetylene generators and industrial processes requiring stable gas production.

The chemical reaction is:

CaC₂ + 2H₂O → C₂H₂↑ + Ca(OH)₂

The generated acetylene gas is widely used in:

Oxy-acetylene welding and cutting

Chemical manufacturing

Industrial gas production

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2. Calcium Carbide 50-80mm Specifications

Product Name:
Calcium Carbide (CaC₂)

Chemical Formula:
CaC₂

Particle Size:
50-80mm

Typical CaC₂ Content:
80-93%

Gas Yield:
255-295 L/kg

Moisture:
≤0.5%

Appearance:
Gray-black lumps

Impurity Control:
Sulfur (S), Phosphorus (P) controlled according to customer requirements

The exact specification should be confirmed through the supplier's Certificate of Analysis (COA).

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3. Gas Yield of Calcium Carbide 50-80mm

Gas yield refers to the amount of acetylene gas produced from one kilogram of calcium carbide when reacting with water.

Reaction:

CaC₂ + 2H₂O → C₂H₂ + Ca(OH)₂

The theoretical gas yield of pure calcium carbide is approximately 349 L/kg.

Commercial calcium carbide has lower gas yield because of:

CaC₂ purity

Impurity content

Moisture

Manufacturing conditions

Common industrial gas yield grades:

295 L/kg:
High-performance acetylene production

285 L/kg:
Industrial acetylene generators

275 L/kg:
General industrial applications

255 L/kg:
Standard industrial applications

Gas yield should be verified according to GB 10665 or customer requirements.

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4. Why Choose 50-80mm Calcium Carbide?

4.1 Stable Acetylene Generation

Compared with smaller particles, 50-80mm calcium carbide reacts more gradually with water.

Advantages:

Stable acetylene output

Reduced pressure fluctuation

Suitable for continuous operation

4.2 Lower Dust Generation

Large calcium carbide lumps provide:

Better mechanical strength

Less breakage during transportation

Lower powder generation

Benefits:

Reduced material loss

Less equipment blockage

Easier handling

4.3 Suitable for Large Industrial Equipment

50-80mm calcium carbide is commonly selected for:

Large acetylene generators

Chemical production systems

Industrial gas applications

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5. Main Applications

5.1 Acetylene Production

The largest application of calcium carbide is acetylene production.

The generated acetylene is used for:

Welding

Cutting

Chemical synthesis

The 50-80mm size provides stable gas release and is suitable for industrial acetylene generators.

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5.2 Steelmaking Desulfurization

Calcium carbide can be injected into molten iron as a desulfurizing agent.

Functions:

Reacts with sulfur

Forms calcium sulfide (CaS)

Reduces sulfur content

Benefits:

Improved steel cleanliness

Better mechanical properties

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5.3 Chemical Manufacturing

Acetylene produced from calcium carbide is used as a chemical raw material for:

PVC production

Vinyl chloride monomer (VCM)

Organic chemical synthesis

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5.4 Foundry Applications

Calcium carbide can be used in molten iron treatment processes, including:

Desulfurization

Iron quality improvement

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6. Calcium Carbide 50-80mm VS Other Sizes

25-50mm Calcium Carbide

Features:

Faster reaction speed

Higher gas release rate

Suitable for smaller generators

50-80mm Calcium Carbide

Features:

Balanced reaction speed

Stable gas generation

Suitable for industrial generators

80-120mm Calcium Carbide

Features:

Slower reaction

Longer reaction duration

Suitable for large continuous systems

Selection depends on:

Generator design

Gas demand

Feeding method

Operating conditions

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7. Quality Control

Professional calcium carbide production requires:

Chemical Testing

Main inspection items:

CaC₂ content

Acetylene gas yield

Sulfur content

Phosphorus content

Moisture

Physical Testing

Inspection includes:

Particle size distribution

Lump appearance

Packaging condition

Quality Documents

Suppliers should provide:

Certificate of Analysis (COA)

Safety Data Sheet (SDS)

Inspection report

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8. Packaging and Storage

Common Export Packaging

50kg Steel Drum:

Suitable for smaller shipments and moisture protection.

100kg Steel Drum:

Suitable for industrial customers.

Jumbo Bag with Inner Liner:

Suitable for bulk orders.

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Storage Requirements

Calcium carbide should be stored:

In dry warehouses

Away from water sources

In moisture-proof packaging

Avoid:

Rain exposure

High humidity

Open storage

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9. Calcium Carbide Buying Guide

Before purchasing calcium carbide, confirm:

Product Requirements:

CaC₂ content

Gas yield

Particle size (50-80mm)

Quantity

Packaging

Supplier Documents:

Request:

COA

SDS

Quality inspection report

Transportation:

Calcium carbide is a water-reactive material and should be transported according to applicable dangerous goods regulations.

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10. Frequently Asked Questions

Q1: What is calcium carbide 50-80mm used for?

Calcium carbide 50-80mm is mainly used for acetylene production, steel desulfurization and industrial chemical applications.

Q2: Why choose 50-80mm calcium carbide?

The larger lump size provides stable reaction speed, lower dust generation and reliable performance in continuous industrial equipment.

Q3: What gas yield can calcium carbide 50-80mm achieve?

Commercial grades typically provide 255-295 L/kg depending on CaC₂ content and quality requirements.

Q4: How is calcium carbide quality verified?

Quality is verified through CaC₂ content, gas yield testing, impurity analysis and particle size inspection.

Q5: How should calcium carbide be stored?

It should be stored in sealed moisture-proof packaging in a dry and ventilated warehouse.