INDUSTRY COMPONENT

Refractory Lining

Refractory lining is a heat-resistant protective layer inside non-ferrous metal induction melting furnaces that withstands extreme temperatures and chemical corrosion.

Component Specifications

Definition
A refractory lining is a specialized thermal insulation component installed on the interior walls of non-ferrous metal induction melting furnaces. It serves as a protective barrier between the molten metal and the furnace structure, maintaining thermal efficiency, preventing heat loss, and protecting the furnace shell from thermal stress and chemical attack. The lining must withstand temperatures exceeding 1600°C while resisting erosion from molten aluminum, copper, zinc, and their alloys.
Working Principle
The refractory lining operates by providing thermal insulation through low thermal conductivity materials, creating a stable thermal gradient. It contains the molten metal bath while minimizing heat transfer to the furnace shell. During operation, the lining absorbs and redistributes thermal stress, prevents metal penetration through its porous structure, and maintains chemical stability against reactive molten metals and slag.
Materials
High-alumina refractory bricks (70-90% Al2O3), magnesia-chrome bricks, silicon carbide composites, or monolithic refractories (castables/ramming mixes). May include additives like zirconia for enhanced corrosion resistance.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Porosity15-25%
Thickness150-300 mm
Bulk Density2.2-2.8 g/cm³
Thermal Conductivity1.5-3.0 W/m·K
Cold Crushing Strength30-60 MPa
Max Service Temperature1700°C

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 1927, DIN 51061

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Thermal shock cracking
  • Chemical corrosion from molten metals
  • Erosion from metal turbulence
  • Structural failure leading to breakout
FMEA Triads
Trigger: Rapid temperature changes during startup/shutdown
Failure: Thermal stress cracking and spalling
Mitigation: Implement controlled heating/cooling cycles, use thermal shock-resistant materials
Trigger: Chemical reaction with aggressive molten metals
Failure: Corrosion and thinning of lining
Mitigation: Select chemically compatible refractories, maintain proper slag chemistry control

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±5 mm thickness variation, ±2°C thermal gradient uniformity
Test Method
ASTM C133 for cold crushing strength, ASTM C20 for apparent porosity, thermal cycling tests per ISO 1893

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 Refractory Lining

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Sino Metal Carbon
Zhongshan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources

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

How often should refractory linings be replaced in induction furnaces?

Replacement frequency depends on operating conditions, typically 6-24 months for continuous operation. Factors include metal type, temperature cycles, and slag chemistry.

What are the signs of refractory lining failure?

Visible cracks, increased energy consumption, metal penetration on furnace exterior, abnormal temperature readings, and reduced melting efficiency indicate lining degradation.

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.

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