Blast furnace
Category:
Product Introduction
I. Blast Furnace Body (including cooling wall, tuyere, and slag tap)
Functional Positioning: The core reaction vessel for ironmaking in a blast furnace, converting iron ore into molten iron through high-temperature reduction reactions. Design life: 15-20 years.
Key Components:
Cooling Wall: Uses copper/cast iron material, embedded in the furnace refractory material. High-temperature heat from inside the furnace is removed through water circulation (cooling water temperature difference ≤10℃), preventing furnace wall damage. Suitable for high-temperature areas such as the furnace body and furnace waist.
Tuyere/Slag Tap: The tuyere uses a copper water-cooled structure, with a diameter of 100-150mm, used for injecting hot air and injecting fuel; the slag tap is located in the lower part of the furnace belly, made of high-chromium cast iron, and withstands the scouring of 1450-1550℃ iron slag.
Technical Parameters:
Furnace Volume: 300-5800m³ (adaptable to annual production of 300,000-6,000,000 tons of molten iron)
Operating Pressure: 0.2-0.35MPa (high-pressure blast furnace)
II. Hot Blast Stove (Internal Combustion/External Combustion)
Functional Positioning: Provides 1100-1350℃ hot air for the blast furnace, improving smelting efficiency and reducing the coke ratio.
Type Comparison:
Type | Structural Characteristics | Hot Air Temperature | Applicable Scenarios |
Internal Combustion | Combustion chamber and heat storage chamber are located in the same furnace, compact structure | ≤1250℃ | Small and medium-sized blast furnaces (≤1000m³) |
External Combustion | Independent external combustion chamber, higher thermal efficiency | ≥1280℃ | Large blast furnaces (≥2000m³) |
Core Configuration:
Heat Storage Body: Checker bricks use silica bricks/high-alumina bricks, heat exchange area ≥500m²/m³ furnace volume
Combustion System: Coal gas/combustion air double preheating, heat utilization rate ≥85%
III. Coal Injection System (PCI)
Functional Positioning: Coal powder is injected into the blast furnace to replace some coke, reducing smelting costs (coal injection per ton of iron: 120-200kg).
System Composition:
Pulverizing Unit: Medium-speed coal mill (processing capacity 15-50t/h), coal powder fineness ≤15% (>200 mesh)
Injection Unit: Dense phase conveying tank (pressure 0.3-0.5MPa), single tuyere coal injection gun (wear-resistant tungsten steel material)
Control Advantages:
Automatic Adjustment: Adjusts the coal injection amount in real time according to furnace temperature and wind pressure (accuracy ±1%)
Safety Protection: CO concentration monitoring + nitrogen inerting system
IV. Top Charging Equipment (Bell-less Top)
Functional Positioning: Achieves uniform material distribution, controls the distribution of blast furnace gas flow, and improves reduction efficiency.
Technical Highlights:
Double Hopper Structure: Upper hopper storage + lower hopper unloading, charging capacity 50-150t/time
Rotating Chute: 360° adjustable (angle 10-55°), material distribution accuracy ±0.5°
Sealing System: Nitrogen sealing (pressure ≥0.05MPa), service life ≥5 years
V. Molten Iron Transfer Car
Functional Positioning: Transports high-temperature molten iron (1400-1500℃) from the blast furnace to the steelmaking workshop, capacity 30-320t.
Core Configuration:
Tank Body: Lined with magnesia carbon bricks (thickness 250-350mm), refractory material life ≥150 times
Tilting Mechanism: Hydraulic drive (tilting angle 130°), positioning accuracy ±0.5°
Running System: Gauge 1435mm, running speed 0-30km/h
System Integration Advantages
Energy Consumption Optimization: External combustion hot blast stove + PCI system combination, energy consumption per ton of iron ≤400kg standard coal (15% lower than traditional processes)
Intelligent Monitoring: Equipped with furnace body temperature field monitoring and material level imaging system, supporting remote maintenance
Customized Service: Can be designed according to American standard API and European standard EN, providing installation and commissioning + refractory material supporting schemes
Online Consultation
Dedicated to provide you with quality products and professional services, please keep the phone open, we will contact you as soon as possible, thank you for your support!
Related Products
Key words:
Contact Information
Yangqu Industrial Park, Shanxi Transformation and Comprehensive Reform Demonstration Zone
Mobile Website