Bosh: Diameter 100-200 mm, Cooling Water Flow 10-30 m³/h

Component Specifications

Definition

The tuyere is a critical component in a blast furnace structure, designed to inject preheated air (blast) at high velocity into the furnace through the tuyere stock. It facilitates the combustion of coke, generating the necessary heat and reducing gases (CO) for iron ore reduction. Typically located in the bosh region, it withstands extreme temperatures (up to 2000°C) and abrasive conditions, ensuring efficient oxygen supply and slag formation control.

Working Principle

Operates by channeling hot blast air (800-1300°C) from the hot blast stoves into the furnace through a nozzle. The high-velocity air promotes coke combustion, releasing heat and carbon monoxide, which reduces iron oxides to molten iron. The tuyere's design (e.g., copper construction with water cooling) manages thermal stress and prevents clogging from slag or debris.

Materials

High-conductivity copper (e.g., C11000) or copper alloys for the body, often with internal water-cooling channels; stainless steel (e.g., 316L) or refractory-lined steel for auxiliary parts; may include ceramic coatings for erosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	100-200 mm
Service Life	6-24 months
Blast Pressure	2-5 bar
Blast Temperature	800-1300°C
Cooling Water Flow	10-30 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

Parent Products

This component is used in the following industrial products

Blast Furnace Structure

The main structural vessel of a blast furnace where iron ore is reduced to molten pig iron through high-temperature chemical reactions.

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Engineering Analysis

Risks & Mitigation

Thermal fatigue leading to cracks
Erosion from slag and particles
Clogging due to debris buildup
Cooling system failure causing overheating

FMEA Triads

Trigger: Inadequate cooling water flow
Failure: Tuyere melting or deformation
Mitigation: Install flow sensors and alarms; use high-purity water to prevent scaling.

Trigger: Abrasive slag accumulation
Failure: Reduced airflow and efficiency
Mitigation: Regular cleaning and inspection; apply wear-resistant coatings.

Trigger: Thermal cycling stress
Failure: Crack formation and leaks
Mitigation: Design with thermal expansion allowances; use durable copper alloys.

Industrial Ecosystem

Compatible With

Blast Furnaces (e.g., from Paul Wurth, Danieli)

Typical Suppliers & Equivalents

Tuyeres from global suppliers like Vesuvius, Calderys, RHI Magnesita

Compliance & Inspection

Tolerance

±2 mm on diameter, ±5°C on temperature control

Test Method

Non-destructive testing (ultrasonic), pressure testing of cooling systems, thermal imaging for heat distribution

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 Bosh

Manufacturer profiles associated with Bosh.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

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

To inject preheated air into the furnace, enabling coke combustion and iron ore reduction by generating heat and carbon monoxide.

Why are tuyeres often made of copper?

Copper's high thermal conductivity allows efficient heat dissipation through water cooling, preventing melting and extending service life in high-temperature environments.

How often should tuyeres be replaced?

Typically every 6 to 24 months, depending on operating conditions, material quality, and maintenance practices, to avoid failures that disrupt production.

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.

Bosh