Fluxing Agents: Particle Size 0-1 mm, Melting Point 1050-1200°C

Component Specifications

Definition

Fluxing agents, specifically continuous casting mold powder, are granular or powdered materials applied to the molten steel surface in the mold during continuous casting. They form a liquid slag layer that regulates heat extraction, prevents reoxidation of the steel, absorbs non-metallic inclusions, and provides lubrication between the solidifying steel shell and the copper mold to ensure smooth strand withdrawal and surface quality.

Working Principle

The powder melts on contact with molten steel, creating a liquid slag layer. This layer controls heat transfer from the steel to the mold, preventing rapid solidification and cracks. It acts as a barrier against atmospheric oxygen, absorbs alumina and other inclusions, and lubricates the mold-strand interface via a crystalline or glassy slag film, reducing friction and sticking.

Materials

Typically composed of CaO-SiO2-Al2O3-based oxides with additions of CaF2, Na2O, K2O, Li2O, MgO, and carbon (coke, graphite) to control melting rate and viscosity. May include B2O3 or MnO for specific properties.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bulk Density	0.8-1.2 g/cm³
Melting Point	1050-1200°C
Particle Size	0-1 mm
Carbon Content	3-10%
Basicity (CaO/SiO2)	0.8-1.2
Viscosity At 1300°C	0.5-2.5 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 11323, DIN 51001

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

Continuous Casting Mold Flux

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

View Product Details

Engineering Analysis

Risks & Mitigation

Inconsistent melting leading to surface defects
Excessive viscosity causing lubrication failure
Moisture absorption affecting flowability
Contamination from impurities

FMEA Triads

Trigger: Incorrect powder composition or carbon content
Failure: Poor slag formation, leading to sticker breakouts or surface cracks
Mitigation: Regular chemical analysis and adjustment of powder blend

Trigger: Uneven powder distribution on molten steel
Failure: Localized heat flux variations, causing longitudinal cracks
Mitigation: Automated powder feeders and monitoring systems

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 in basicity ratio, ±5% in carbon content, viscosity within ±10% of target

Test Method

ISO 11323 for chemical analysis, rotary viscometer for viscosity, DSC for melting behavior

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 Fluxing Agents

Manufacturer profiles associated with Fluxing Agents.

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Frequently Asked Questions

What is the primary function of mold powder in continuous casting?

To control heat transfer, prevent oxidation, absorb inclusions, and lubricate the mold for smooth strand withdrawal and high-quality steel surface.

How does carbon content affect mold powder performance?

Carbon acts as a melting rate controller; higher carbon slows melting, ensuring gradual slag formation and consistent lubrication throughout the casting process.

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.

Fluxing Agents