INDUSTRY COMPONENT

Lance Tip/Nozzle Block

A precision component in oxygen lance systems that controls oxygen flow and distribution during steelmaking processes.

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Component Specifications

Definition
The Lance Tip/Nozzle Block is a critical component of the Oxygen Lance System used in basic oxygen furnaces (BOF) and electric arc furnaces (EAF). It serves as the terminal interface where high-pressure oxygen is expelled into molten metal baths. This component features precisely engineered orifices that atomize and direct oxygen streams to facilitate decarburization, temperature control, and slag formation during steel production. Its design directly impacts process efficiency, refractory wear, and final steel quality.
Working Principle
The component operates by receiving high-pressure oxygen through the lance body and distributing it through multiple calibrated nozzles. These nozzles create supersonic oxygen jets that penetrate the molten metal bath, promoting chemical reactions (primarily oxidation of carbon and impurities) and creating turbulence for homogeneous mixing. The nozzle geometry (typically Laval or convergent-divergent design) accelerates oxygen to velocities exceeding Mach 2, ensuring deep penetration and efficient reaction kinetics while minimizing splashback and refractory erosion.
Materials
High-temperature copper alloys (typically chromium-copper or zirconium-copper) with water-cooling channels; Alternative materials include high-grade stainless steels (316L) for specific applications; Internal surfaces may feature ceramic coatings (alumina or zirconia) for enhanced erosion resistance.
Technical Parameters
  • Weight 50-200 kg
  • Flow Rate 500-1200 Nm³/min
  • Connection Type Flanged or threaded
  • Nozzle Diameter 15-40 mm
  • Number of Nozzles 3-8
  • Cooling Water Flow 50-150 m³/h
  • Operating Temperature Up to 2000°C (intermittent)
  • Oxygen Pressure Range 0.8-1.5 MPa
Standards
ISO 4957, DIN 17400, ASTM B224

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Lance Tip/Nozzle Block.

oxygen lance nozzle steelmaking lance tip BOF nozzle block EAF lance component copper alloy nozzle steel production equipment Lance Tip/Nozzle Block Lance Tip/Nozzle Block in Basic Metal Manufacturing

Parent Products

This component is used in the following industrial products

Oxygen Lance System

A critical subsystem in basic oxygen steelmaking that delivers high-purity oxygen into the molten iron bath to oxidize impurities.

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Engineering Analysis

Risks & Mitigation
  • Thermal shock failure
  • Erosion-induced flow distortion
  • Coolant leakage causing explosions
  • Nozzle blockage leading to pressure spikes
FMEA Triads
Trigger: Cyclic thermal loading during lance insertion/retraction
Failure: Thermal fatigue cracks in copper alloy
Mitigation: Implement controlled heating/cooling cycles; Use materials with higher thermal fatigue resistance
Trigger: High-velocity particle impingement from slag/metal droplets
Failure: Progressive erosion of nozzle throat
Mitigation: Apply ceramic coatings; Regular dimensional inspection and replacement before critical erosion
Trigger: Corrosion in cooling water channels
Failure: Coolant leakage into molten bath causing steam explosion
Mitigation: Use treated cooling water; Implement pressure monitoring and automatic shutdown systems

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Nozzle diameter ±0.1 mm; Angular alignment ±0.5°; Surface roughness Ra ≤ 1.6 μm
Test Method
Hydrostatic pressure testing at 3x operating pressure; Flow calibration using ISO 5167; Dimensional verification with CMM; Thermal cycling simulation

Buyer Feedback

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Refractory liner for molten metal flow control valves, providing thermal insulation and erosion resistance in extreme temperature applications.
Rotary Impeller
A high-speed rotating impeller used in molten metal degassing systems to inject inert gases and remove impurities.
Probe Assembly
High-temperature sampling probe for molten metal composition analysis in metallurgical processes

Frequently Asked Questions

What is the typical lifespan of a lance tip/nozzle block?

Lifespan varies from 200-800 heats depending on operating conditions, material quality, and maintenance practices. Regular inspection for erosion and thermal cracking is essential.

How does nozzle design affect steelmaking efficiency?

Nozzle geometry determines oxygen jet characteristics. Optimal designs maximize bath penetration while minimizing splash and refractory wear, typically improving yield by 0.5-1.5%.

What are common failure modes?

Primary failures include thermal fatigue cracking, erosion from high-velocity particles, blockage from slag buildup, and coolant leakage from corrosion or mechanical damage.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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