Glass Formers: Particle_Size D50: 20-50 μm, SiO2_Content 40-60%

Component Specifications

Definition

Glass formers are chemical compounds added to continuous casting mold flux formulations to lower the melting temperature and promote the formation of a stable, viscous glassy layer. This layer acts as a thermal insulator and lubricant between the molten steel and the copper mold, preventing oxidation, minimizing friction, and controlling heat transfer during the solidification process in steel production.

Working Principle

Glass formers work by reducing the viscosity and melting point of the mold flux through network-forming oxides like SiO2, B2O3, and P2O5. When heated, they create an amorphous glass structure that floats on the molten steel, forming a continuous protective barrier that prevents air contact, absorbs inclusions, and ensures uniform heat extraction for defect-free steel surfaces.

Materials

Typically composed of silica (SiO2), boron oxide (B2O3), phosphorus pentoxide (P2O5), or alumina (Al2O3) in powder or granular form, with purity levels of 95-99.9% and controlled particle size distribution (10-100 microns).

Technical Parameters

Parameter	Typical range	Notes & selection driver
SiO2 Content	40-60%
Particle Size	D50: 20-50 μm
Basicity Index	0.8-1.2
Melting Temperature	900-1200°C
Viscosity At 1300°C	0.5-2.0 Pa·s

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 13320, DIN 51001

Parent Products

This component is used in the following industrial products

Continuous Casting Mold Flux

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

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Engineering Analysis

Risks & Mitigation

Inconsistent viscosity leading to poor lubrication
Contamination from impurities causing surface defects
Thermal instability under high-temperature conditions

FMEA Triads

Trigger: Incorrect SiO2 ratio in formulation
Failure: High viscosity causing poor glass layer formation and increased friction
Mitigation: Implement strict quality control on raw material composition and perform regular viscosity testing

Trigger: Moisture absorption during storage
Failure: Reduced effectiveness and potential explosion hazards during heating
Mitigation: Use airtight containers and controlled humidity storage environments

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±2% on chemical composition, ±5% on particle size distribution

Test Method

X-ray fluorescence (XRF) for composition analysis, rotational viscometry for viscosity measurement

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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Manufacturers of Glass Formers

Manufacturer profiles associated with Glass Formers.

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Related Components

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.

Aluminum Matrix

Aluminum matrix is the continuous metallic phase in aluminum matrix composites, providing structural integrity and thermal/electrical conductivity in hot-forged aluminum alloy billets.

Grain Structure

The crystalline arrangement of atoms in hot-forged aluminum alloy billets, determining mechanical properties and performance.

Frequently Asked Questions

What is the primary function of glass formers in continuous casting?

The primary function is to form a protective glassy layer that prevents oxidation of molten steel, lubricates the mold-steel interface, and controls heat transfer for smooth solidification.

How do glass formers affect steel surface quality?

They ensure uniform heat extraction and reduce friction, minimizing surface defects like cracks, wrinkles, and inclusions, resulting in higher-quality steel products.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Glass Formers