Carbon Additive: Particle Size 50-200 microns, Moisture <0.5%

Q: What is the primary function of carbon additive in mold powder?

The primary function is to control heat transfer and create a reducing atmosphere at the mold-steel interface, preventing oxidation and improving surface quality of cast steel.

Q: How does carbon content affect mold powder performance?

Higher carbon content improves thermal insulation and reduces slag melting rate, while lower carbon content increases thermal conductivity and accelerates solidification.

Q: What are common sources of carbon additives?

Common sources include petroleum coke, graphite, calcined anthracite, and carbon black, selected based on purity, particle size, and cost considerations.

Component Specifications

Definition

A carbon-based material added to continuous casting mold powder formulations to regulate thermal conductivity, control solidification patterns, prevent steel sticking to the mold, and improve the surface quality of cast steel products by forming a protective slag layer.

Working Principle

Carbon additives function by creating a reducing atmosphere at the mold-steel interface, controlling heat transfer through the slag layer, preventing oxidation of the steel surface, and facilitating uniform solidification by modifying the viscosity and melting characteristics of the mold powder.

Materials

Typically composed of petroleum coke, graphite, calcined anthracite, or carbon black with carbon content ranging from 85-99%, low ash content (<5%), low sulfur (<0.5%), and controlled particle size distribution (usually 50-200 microns).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Moisture	<0.5%
Ash Content	<5%
Bulk Density	0.5-0.8 g/cm³
Fixed Carbon	>90%
Particle Size	50-200 microns
Carbon Content	85-99%
Sulfur Content	<0.5%

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 80000-9, DIN 51733, ASTM D3172

Parent Products

This component is used in the following industrial products

Continuous Casting Mold Powder

Continuous casting mold powder is a specialized granular flux material applied to the molten steel surface in continuous casting molds.

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Engineering Analysis

Risks & Mitigation

Inconsistent carbon content leading to variable solidification
Excessive carbon causing excessive slag viscosity
Contamination from impurities affecting steel quality
Particle size variations impacting distribution uniformity

FMEA Triads

Trigger: Inconsistent carbon content in raw materials
Failure: Variable solidification rates and surface defects
Mitigation: Implement strict incoming material testing and batch blending

Trigger: Improper particle size distribution
Failure: Uneven distribution in mold powder leading to localized defects
Mitigation: Use controlled grinding and sieving processes with regular particle size analysis

Trigger: Moisture absorption during storage
Failure: Reduced effectiveness and potential steel quality issues
Mitigation: Store in dry, sealed containers with controlled humidity environments

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Carbon content ±1.5%, particle size distribution within specified range ±10%

Test Method

ASTM D3172 for carbon content, ISO 13320 for particle size analysis, ASTM D4239 for sulfur determination

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Carbon Additive

Manufacturer profiles associated with Carbon Additive.

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Frequently Asked Questions

What is the primary function of carbon additive in mold powder?