Tuyere Nozzle: Nozzle Diameter 80-150 mm

Component Specifications

Definition

The tuyere nozzle is a precisely engineered component within the blast furnace tuyere assembly, designed to inject high-velocity, high-temperature air (blast) into the furnace hearth. It plays a vital role in maintaining the combustion zone, regulating temperature distribution, and ensuring efficient reduction of iron ore to molten iron. The nozzle's geometry and positioning directly impact furnace efficiency, fuel consumption, and operational stability.

Working Principle

The tuyere nozzle operates by channeling compressed air (typically enriched with oxygen) from the bustle pipe through the tuyere stock into the blast furnace. The nozzle's convergent-divergent design accelerates the air to supersonic speeds, creating a high-velocity jet that penetrates the coke bed. This jet sustains the combustion of coke, generating the necessary heat (up to 2000°C) and carbon monoxide for reducing iron oxides to molten iron, while also stirring the molten metal and slag layers.

Materials

High-temperature resistant alloys such as copper (for cooling efficiency) with internal water-cooling channels, often coated with refractory materials like alumina or zirconia to withstand thermal shock and chemical corrosion from slag and hot metal. Common grades include C12200 copper alloy or specialized steel alloys with chromium and nickel.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Air Velocity	200-300 m/s
Service Life	6-12 months under continuous operation
Nozzle Diameter	80-150 mm
Blast Temperature	1000-1300°C
Operating Pressure	3-5 bar
Cooling Water Flow Rate	10-20 m³/h

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 4706, DIN 17100, ASTM B152

Parent Products

This component is used in the following industrial products

Blast Furnace Tuyere Assembly

A tuyere assembly is an essential component installed in the blast furnace hearth wall, responsible for injecting preheated air (hot blast) into the furnace to combust coke and generate the high temperatures required for iron ore reduction.

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Engineering Analysis

Risks & Mitigation

Thermal fatigue leading to cracks
Erosion from high-velocity particles
Corrosion from slag and hot metal
Blockage due to buildup of materials
Cooling system failure causing overheating

FMEA Triads

Trigger: Inadequate cooling water flow
Failure: Nozzle overheating and melting
Mitigation: Install flow sensors and alarms; use redundant cooling systems; schedule regular maintenance checks.

Trigger: Erosion from abrasive particles in the blast
Failure: Reduced nozzle diameter and inefficient air injection
Mitigation: Use wear-resistant coatings; monitor blast quality; implement predictive maintenance based on wear rates.

Trigger: Thermal cycling stress
Failure: Crack formation and potential leakage
Mitigation: Design with thermal expansion allowances; use materials with high thermal shock resistance; conduct non-destructive testing (NDT) periodically.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5 mm on critical dimensions (e.g., nozzle diameter), surface roughness Ra ≤ 3.2 μm

Test Method

Hydrostatic pressure testing at 1.5x operating pressure, thermal cycling tests, dimensional inspection via CMM, and NDT (ultrasonic or dye penetrant) for defect detection.

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 Tuyere Nozzle

Manufacturer profiles associated with Tuyere Nozzle.

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Frequently Asked Questions

What is the primary function of a tuyere nozzle in a blast furnace?

The primary function is to inject high-pressure, high-temperature air into the furnace to sustain coke combustion, which generates heat and reducing gases for converting iron ore to molten iron.

How often should tuyere nozzles be replaced?

Replacement typically occurs every 6 to 12 months, depending on operating conditions, material wear from thermal cycling, and corrosion. Regular inspections are recommended to prevent failures.

What materials are best for tuyere nozzles?

Copper alloys are preferred for their excellent thermal conductivity and cooling efficiency, often combined with refractory coatings to resist extreme temperatures and chemical attack from slag.

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.

Tuyere Nozzle