Cooling Water Jacket: Water Flow Rate 15-25 m³/h

Component Specifications

Definition

The cooling water jacket is an engineered enclosure surrounding the blast furnace tuyere, designed with internal channels or passages that facilitate continuous water circulation. This component serves as a heat exchanger, absorbing intense thermal energy (typically 1200-1500°C) from the hot blast and molten materials in the furnace hearth, thereby maintaining the tuyere's structural integrity and preventing premature failure. It operates under high-pressure conditions (typically 0.8-1.5 MPa) and is integral to the furnace's thermal management system.

Working Principle

The cooling water jacket operates on forced convection heat transfer principles. Cool water enters through inlet ports, flows through precisely designed internal passages surrounding the tuyere body, absorbs thermal energy from the hot surfaces, and exits as heated water through outlet ports. This continuous circulation creates a thermal barrier that maintains the tuyere metal temperature below its critical threshold (typically below 300°C), preventing thermal stress, oxidation, and deformation.

Materials

High-conductivity copper alloys (C12200 or C11000) with 99.9% purity, or specialized copper-silver alloys for enhanced thermal conductivity and corrosion resistance. Internal surfaces may have protective coatings like nickel plating to prevent scaling and erosion.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Design Life	2-3 years continuous operation
Water Flow Rate	15-25 m³/h
Inlet Temperature	25-35°C
Operating Pressure	0.8-1.5 MPa
Outlet Temperature	45-60°C
Heat Transfer Coefficient	300-500 W/m²·K

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 13579-4, DIN 1718, 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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Lance Body/Tube

The main structural component of an oxygen lance that houses and protects the oxygen delivery mechanism.

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Engineering Analysis

Risks & Mitigation

Thermal stress cracking
Corrosion and scaling
Water leakage into furnace
Flow blockage
Cavitation damage

FMEA Triads

Trigger: Mineral deposition and scaling in water passages
Failure: Reduced heat transfer efficiency leading to localized overheating
Mitigation: Implement water treatment systems, regular descaling procedures, and install flow monitoring with automatic alerts

Trigger: Erosion-corrosion from high-velocity water flow
Failure: Wall thinning and eventual leakage
Mitigation: Use erosion-resistant materials, maintain optimal flow velocities (2-3 m/s), and conduct regular thickness measurements

Trigger: Thermal fatigue from cyclic heating and cooling
Failure: Crack formation and propagation in critical areas
Mitigation: Design with gradual temperature transitions, use fatigue-resistant materials, and implement controlled heating/cooling cycles

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerance ±0.5 mm on critical surfaces, flatness tolerance 0.1 mm over 100 mm, surface roughness Ra ≤ 3.2 μm for sealing surfaces

Test Method

Hydrostatic pressure testing at 1.5 times operating pressure for 30 minutes, thermal cycling tests (100 cycles from 50°C to 300°C), flow distribution testing using dye injection, and ultrasonic thickness mapping

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 Cooling Water Jacket

Manufacturer profiles associated with Cooling Water Jacket.

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Frequently Asked Questions

Why are cooling water jackets typically made of copper alloys?

Copper alloys offer superior thermal conductivity (approximately 400 W/m·K), which is 8-10 times higher than steel, enabling efficient heat dissipation. They also provide good corrosion resistance against treated cooling water and can withstand the thermal cycling conditions in blast furnace operations.

What happens if the cooling water flow is interrupted?

Flow interruption causes rapid temperature increase in the tuyere assembly, potentially leading to thermal stress cracking, metal deformation, tuyere burn-through, and catastrophic failure within minutes. Modern systems include flow sensors and automatic shutdown protocols to prevent such incidents.

How often should cooling water jackets be inspected?

Visual inspections should occur weekly, with comprehensive thermal imaging and ultrasonic thickness testing conducted during scheduled furnace maintenance (typically every 6-12 months). Internal scaling and corrosion monitoring should be performed quarterly through water quality analysis.

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.

Cooling Water Jacket