Alumina Component: Melting Point 1100-1300°C

Q: What is the primary function of alumina in mold powder components?

Alumina provides thermal insulation, controls melting characteristics, and contributes to slag viscosity for optimal lubrication and heat transfer during continuous casting.

Q: How does alumina content affect mold powder performance?

Higher alumina content increases viscosity and melting temperature, improving insulation but requiring careful balance with other oxides to maintain proper melting rate and lubrication.

Component Specifications

Definition

A specialized refractory component made primarily from alumina (Al₂O₃) used within continuous casting mold powder systems to regulate heat transfer, lubricate the mold-strand interface, and control steel solidification during the continuous casting process in steel production.

Working Principle

The alumina component functions by maintaining thermal insulation at the meniscus region of the mold, reducing heat loss from the molten steel to the copper mold. It melts progressively to form a liquid slag layer that lubricates the strand, absorbs inclusions, and creates a uniform heat flux profile for controlled solidification of the steel shell.

Materials

High-purity alumina (≥85% Al₂O₃) with silica (SiO₂), calcium oxide (CaO), and sodium oxide (Na₂O) additives; may include carbonaceous materials for melting rate control.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Melting Point	1100-1300°C
Carbon Content	3-8%
Al₂O₃ Content	85-95%
Viscosity At 1300°C	0.5-2.0 Pa·s
Basicity (CaO/SiO₂)	0.8-1.2
Particle Size Distribution	80% < 75μm

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 10081, DIN 51060

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.

View Product Details

Engineering Analysis

Risks & Mitigation

Thermal shock cracking
Inconsistent melting leading to surface defects
Alumina buildup causing operational disruptions
Chemical incompatibility with specific steel grades

FMEA Triads

Trigger: Rapid temperature fluctuations during casting start-up
Failure: Thermal cracking of alumina component
Mitigation: Implement controlled preheating protocols and use graded alumina compositions

Trigger: Incorrect alumina/silica ratio
Failure: Premature melting causing inadequate insulation
Mitigation: Maintain strict chemical composition control and implement real-time slag analysis

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Chemical composition ±1.5%, particle size distribution ±5%

Test Method

XRF chemical analysis, laser diffraction particle sizing, high-temperature viscometry

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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

Manufacturers of Alumina Component

Manufacturer profiles associated with Alumina Component.

Sourcing Alumina Component from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Valve Body

Valve body is the main structural housing of a molten metal flow control valve, designed to withstand extreme temperatures and corrosive environments while directing metal flow.

Refractory Liner

Refractory liner for molten metal flow control valves, providing thermal insulation and erosion resistance in extreme temperature applications.

Work Rolls

Work rolls are precision cylindrical components in heavy-duty rolling mills that directly contact and deform metal during rolling operations.

Venting Channels

Venting channels are precision-engineered passages in metal casting mold cores designed to allow gases to escape during the molten metal pouring process, preventing defects and ensuring high-quality castings.

Frequently Asked Questions

What is the primary function of alumina in mold powder components?