Integrated BF-BOF Steelmaking System

Product Specifications

Technical details and manufacturing context for Integrated Blast Furnace and Basic Oxygen Furnace Steelmaking System

Definition

The Integrated Blast Furnace and Basic Oxygen Furnace (BF-BOF) Steelmaking System is a large-scale industrial installation that combines ironmaking and steelmaking in a continuous production flow. It is the core of primary steel plants, designed for high-volume production of liquid steel from iron ore, coke, and limestone. The system comprises two main process stages: the blast furnace reduces iron ore to molten iron (hot metal), and the basic oxygen furnace (BOF) refines this hot metal into liquid steel of specified grades by blowing high-purity oxygen to oxidize impurities such as carbon, silicon, and manganese. The system is engineered for optimized energy and material efficiency, with typical parameters including a blast furnace inner volume of 2000–5000 m³, BOF vessel capacity of 100–300 tonnes per heat, oxygen blow rate of 3.0–4.5 Nm³/min, tap-to-tap time of 30–45 minutes, and system energy consumption of 550–650 GJ per tonne of steel. Hot metal temperature is typically 1350–1450 °C, top gas pressure 0.15–0.25 MPa, blast temperature 1150–1250 °C, and oxygen purity 99.5–99.9%. Refractory lining life is 5000–8000 heats, and system availability is 92–96%. The system includes auxiliary equipment such as refractory linings, carbon steel structural plates, and copper cooling plates. It represents a critical capital investment in the B2B industrial supply chain, supplying steel to downstream rolling mills and manufacturing sectors. For procurement, verify model-specific values and applicable standards with the legal manufacturer or supplier.

Working Principle

Iron ore, coke, and limestone are charged into the blast furnace, where coke serves as fuel and reductant. Hot air (blast) is blown in, reducing the ore to molten iron. The hot metal is then transferred to a basic oxygen furnace (BOF). A high-purity oxygen lance is inserted, and oxygen is blown at a rate of 3.0–4.5 Nm³/min to oxidize impurities such as carbon, silicon, and manganese, producing liquid steel. The process is controlled by parameters such as hot metal temperature (1350–1450 °C), top gas pressure (0.15–0.25 MPa), and blast temperature (1150–1250 °C). The BOF vessel capacity is 100–300 tonnes per heat, and the tap-to-tap time is 30–45 minutes. The system achieves high-volume production with optimized energy and material efficiency.

Common Materials

Refractory Linings, Carbon Steel Structural Plates, Copper Cooling Plates

Technical Parameters

Parameter	Typical range	Notes & selection driver
Blast Furnace Inner VolumeRequired	2000–5000 m³	Useful volume of the blast furnace hearth and stack
BOF Vessel CapacityRequired	100–300 tonnes	Maximum weight of hot metal charged per heat
Oxygen Blow RateRequired	3.0–4.5 Nm³/min	Maximum flow rate of oxygen through the BOF lance
Tap-to-Tap TimeRequired	30–45 minutes	Average time for one complete BOF steelmaking cycle
System Energy Consumption	550–650 GJ/tonne steel	Total energy consumed per tonne of liquid steel produced
Hot Metal Temperature	1350–1450 °C	Too low causes skulling in ladle and BOF.
Top Gas Pressure	0.15–0.25 MPa	High pressure improves reduction efficiency.
Blast Temperature	1150–1250 °C	Higher reduces coke rate.
Oxygen Purity	99.5–99.9 %	Impurities affect steel quality.
Refractory Lining Life	5000–8000 heats	Longer reduces downtime and cost.
System Availability	92–96 %	Includes scheduled maintenance; higher is better.
Noise Level	≤85 dB(A)	Worker safety limit; requires hearing protection.ISO 11201
Dust Emission	≤15 mg/Nm³	Environmental compliance; lower is stricter.GB 28662

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Blast Furnace Structure
Reduces iron oxides to molten pig iron using coke and hot blast

Material: Refractory-lined steel shell
Hot Metal Torpedo Car
Transports molten iron from blast furnace to BOF shop

Material: Refractory-lined steel vessel
Basic Oxygen Furnace Vessel
Refines hot metal into steel by injecting oxygen to remove impurities

Material: Refractory-lined steel shell with trunnion ring
Oxygen Lance System
Injects high-purity oxygen into the BOF bath for decarburization

Material: Copper tip with steel water-cooled lance body
Gas Cleaning Plant
Cleans and recovers BOF process gases (CO) to prevent pollution

Material: Steel ducting with scrubbers and electrostatic precipitators

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Integrated Blast Furnace and Basic Oxygen Furnace Steelmaking System.

Manufacturers of Integrated Blast Furnace and Basic Oxygen Furnace Steelmaking System

Manufacturer profiles associated with Integrated Blast Furnace and Basic Oxygen Furnace Steelmaking System.

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Frequently Asked Questions

What is the typical capacity range of the BOF vessel in this system?

The BOF vessel capacity is typically 100–300 tonnes of hot metal charged per heat. This is a reference range; the exact capacity depends on the specific system configuration and should be confirmed with the manufacturer.

What are the key parameters affecting steel quality in the BOF process?

Key parameters include oxygen purity (99.5–99.9%), hot metal temperature (1350–1450 °C), and oxygen blow rate (3.0–4.5 Nm³/min). Impurities in the hot metal affect steel quality, and the oxygen blowing process is designed to oxidize them. Verify these parameters for your specific application.

How is system energy consumption measured?

System energy consumption is measured in GJ per tonne of liquid steel produced, with a typical range of 550–650 GJ/tonne. This includes energy for ironmaking and steelmaking. The actual value depends on operational practices and should be verified with the supplier.

What maintenance signals indicate potential issues in the system?

Signals include reduced refractory lining life (typically 5000–8000 heats), increased downtime, and lower system availability (92–96%). Also, monitor noise levels (≤85 dB(A)) and dust emissions (≤15 mg/Nm³) for compliance. Regular inspection of refractory linings and cooling plates is essential.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Blast furnace: 2-5 bar (hot blast pressure), BOF: Atmospheric with controlled oxygen injection
flow rate:	Hot metal transfer: 100-500 tonnes/hour, Oxygen injection: 20-50 Nm³/tonne steel
temperature:	1450-1700°C (blast furnace hot metal: 1400-1500°C, BOF steelmaking: 1600-1700°C)
slag handling:	Basic slag with CaO/SiO₂ ratio 2.0-4.0, Slag volume: 100-150 kg/tonne hot metal

Integrated Blast Furnace and Basic Oxygen Furnace Steelmaking System

Product Specifications

Industry Taxonomies & Aliases

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards