Industry-Verified Manufacturing Data (2026)

Basic Oxygen Furnace Vessel

Based on aggregated insights from multiple verified 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.

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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
    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
    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
    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
Engineering Reasoning
0.8-1.2 MPa working pressure, 1600-1700°C operating temperature, 300-400 tons capacity
Vessel shell temperature exceeds 450°C (creep deformation threshold), refractory lining erosion depth > 500 mm, oxygen lance misalignment > 3° from vertical
Design Rationale: Thermal fatigue from 1600°C thermal cycling causes refractory spalling; oxygen jet impingement at Mach 2.0 creates localized erosion zones; slag-metal interface corrosion at pH 12-14
Risk Mitigation (FMEA)
Trigger Refractory lining thickness reduction below 600 mm due to chemical corrosion
Mode: Vessel shell overheating to 500°C causing permanent deformation
Strategy: Install 12-point infrared thermography system with 50°C alarm threshold and automated shutdown
Trigger Oxygen lance positioning error exceeding 5° from vertical axis
Mode: Asymmetric blowing causing uneven temperature distribution (±150°C variation)
Strategy: Implement laser-guided lance alignment with 0.1° precision and real-time feedback control

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 DNA

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

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

T Technical Director from Australia Jan 06, 2026
★★★★★
"As a professional in the Basic Metal Manufacturing sector, I confirm this Basic Oxygen Furnace Vessel meets all ISO standards."
Technical Specifications Verified
P Project Engineer from Singapore Jan 03, 2026
★★★★☆
"Standard OEM quality for Basic Metal Manufacturing applications. The Basic Oxygen Furnace Vessel arrived with full certification. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Germany Dec 31, 2025
★★★★★
"Great transparency on the Basic Oxygen Furnace Vessel components. Essential for our Basic Metal Manufacturing supply chain."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

17 sourcing managers are analyzing this specification now. Last inquiry for Basic Oxygen Furnace Vessel from India (31m ago).

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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 Specifications verified by CNFX Industrial Index (v2.6.03) for Basic Metal Manufacturing sector.

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