Structured Manufacturing Data (2026)

Basic Oxygen Furnace Vessel

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Basic Oxygen Furnace Vessel used in the Basic Metal Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Basic Oxygen Furnace Vessel is characterized by the integration of Refractory Lining and Steel Shell. In industrial production environments, manufacturers listed on CNFX commonly emphasize Refractory Lining (e.g., Magnesia-Carbon, Dolomite) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The main reaction vessel in a Basic Oxygen Furnace (BOF) where molten iron is converted into steel through oxygen blowing.

View Full Specifications Explore Manufacturing Sources

Product Specifications

Technical details and manufacturing context for Basic Oxygen Furnace Vessel

Definition
The Basic Oxygen Furnace Vessel is the core component of the Basic Oxygen Furnace within an Integrated Blast Furnace and Basic Oxygen Furnace Steelmaking System. It is a refractory-lined, tiltable steel container designed to hold and process a batch (or 'heat') of molten iron from the blast furnace. Its primary function is to facilitate the decarburization and refining of the molten iron into steel by injecting high-purity oxygen at supersonic speeds, oxidizing impurities like carbon, silicon, manganese, and phosphorus, which are removed as slag or gas.
Working Principle
The vessel receives a charge of molten iron and scrap steel. It is then tilted to an upright position. A water-cooled oxygen lance is lowered into the vessel, injecting a high-velocity jet of pure oxygen onto the surface of the molten metal bath. This initiates intense exothermic oxidation reactions, primarily of carbon (forming CO/CO₂ gas), which raises the temperature and refines the iron into steel. The vessel is tilted to pour off the slag and, finally, to tap the finished molten steel.
Common Materials
Refractory Lining (e.g., Magnesia-Carbon, Dolomite), Steel Shell
Technical Parameters
  • Nominal heat size or capacity of the vessel. (tonnes) Customizable
Components / BOM
  • Refractory Lining Part
    Provides thermal insulation and chemical resistance against the high-temperature, corrosive molten metal and slag.
    Material: Magnesia-Carbon, Dolomite, or other basic refractories
  • Steel Shell Part
    The structural outer body that contains the refractory lining and supports the trunnion ring.
    Material: Steel plate
  • Trunnion Ring
    A heavy ring attached to the shell that interfaces with the tilting drive mechanism, allowing the vessel to rotate.
    Material: Forged or cast steel
  • Tapping Spout Part
    The chute or opening through which molten steel is poured out during tapping.
    Material: Refractory-lined steel
  • Slagging Spout
    A separate opening or lip used to pour off slag after the oxygen blow.
    Material: Refractory-lined steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Basic Oxygen Furnace Vessel.

basic oxygen furnace vessel refractory lining BOF vessel steel shell specifications oxygen blowing furnace vessel maintenance basic oxygen steelmaking vessel components industrial BOF vessel replacement parts

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar (slight positive pressure during oxygen blowing)
flow rate: Oxygen flow: 2-4 Nm³/tonne steel/min
temperature: 1500-1700°C (operating range for molten iron/steel)
vessel capacity: 100-400 tonnes per heat
slag concentration: 10-20% by weight (lime-based slag)
Media Compatibility
✓ Molten iron (hot metal) ✓ Lime-based slag (CaO-SiO₂-FeO system) ✓ Oxygen gas (99.5% purity)
Unsuitable: Chlorine-containing environments (causes stress corrosion cracking in refractory lining)
Sizing Data Required
  • Required steel production capacity (tonnes per heat)
  • Oxygen blowing rate (Nm³/min)
  • Refractory lining thickness/life requirements

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Refractory Lining Degradation
Cause: Thermal cycling and chemical attack from molten steel and slag, leading to spalling, erosion, and thinning of the refractory material.
Tuyere Blockage or Failure
Cause: Accumulation of slag and metallic deposits during oxygen injection, causing reduced flow, backpressure, or mechanical damage to the tuyere assembly.
Maintenance Indicators
  • Excessive heat radiation or localized hot spots on the vessel exterior, indicating refractory wear or failure.
  • Abnormal noises (e.g., whistling, rumbling) during oxygen blowing, suggesting tuyere blockage or improper gas flow.
Engineering Tips
  • Implement a rigorous refractory inspection and gunning program using thermal imaging and thickness measurements to monitor lining condition and perform timely repairs.
  • Optimize oxygen injection parameters and use nitrogen purging between heats to prevent tuyere clogging, coupled with regular mechanical cleaning and replacement schedules.

Compliance & Manufacturing Standards

Reference Standards
ISO 4706: Refractory linings for steelmaking vessels ASTM A36/A36M: Structural steel for fabrication EN 10025: Hot rolled products of structural steels
Manufacturing Precision
  • Vessel shell thickness: +/-5% of nominal
  • Nozzle alignment: +/-2mm from centerline
Quality Inspection
  • Ultrasonic Testing (UT) for weld integrity
  • Thermographic Analysis for refractory lining condition

Factories Producing Basic Oxygen Furnace Vessel

Manufacturer profiles with relevant production capability in China

Add your factory

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Supply Chain Compatible Machinery & Devices

Continuous Casting Machine

Industrial machine for solidifying molten metal into continuous billets/blooms/slabs.

Explore Specs →
Electromagnetic Induction Heater

Industrial heating device using electromagnetic induction for metal processing

Explore Specs →
Vacuum Induction Melting Furnace

Industrial furnace for melting metals under vacuum using electromagnetic induction

Explore Specs →
Electroslag Remelting Furnace

Secondary refining furnace for high-quality metal ingots

Explore Specs →

Frequently Asked Questions

What is the primary function of a Basic Oxygen Furnace Vessel?

The Basic Oxygen Furnace Vessel serves as the main reaction chamber where molten iron is converted into steel through the injection of high-purity oxygen, removing impurities like carbon, silicon, and phosphorus.

What materials are used in BOF vessel construction?

BOF vessels consist of a durable steel shell lined with refractory materials such as Magnesia-Carbon or Dolomite to withstand extreme temperatures (up to 1700°C) and corrosive slag during steelmaking.

How often does the refractory lining need replacement in a BOF vessel?

Refractory lining lifespan varies based on operating conditions, typically requiring partial repairs after 500-1,000 heats and full relining every 2,000-4,000 heats to maintain vessel integrity and steel quality.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Basic Metal Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

Request Manufacturing Insight for Basic Oxygen Furnace Vessel

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for Basic Oxygen Furnace Vessel.

Your business information is used only to process this request.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Thank you! Your message has been sent. We'll respond within 1–3 business days.

Need to Manufacture Basic Oxygen Furnace Vessel?

Compare manufacturer profiles with relevant product and process capability.

Create Manufacturer Profile Contact Us
Previous Product
Backup Rolls
Next Product
Billet Heater