In the harsh and demanding environment of steel plants, high-performance butterfly valves are essential due to their ability to withstand high temperatures, corrosion, abrasion, and provide precise control. They are widely used in critical areas to meet stringent production process and environmental requirements.
1. Ironmaking System
- Blast Furnace Hot Blast Stove: Control hot blast flow and pressure to ensure stable furnace temperature. Requires high-temperature (above 300°C) metal-seated butterfly valves (e.g., triple offset design) to prevent thermal deformation and leakage.
- Converter Gas Cleaning System: Handle high-temperature dust-laden flue gas (e.g., CO, dust). Requires wear-resistant, corrosion-resistant electric high-temperature ventilation butterfly valves for flue gas flow control and emergency shutdown.
2. Steelmaking Workshop
- Oxygen/Nitrogen Pipelines: Transport high-pressure, flammable, and explosive gases. Requires bi-directional sealing, anti-static, metal-seated butterfly valves (e.g., 316L stainless steel) to ensure zero leakage and safety.
- Continuous Casting Equipment Cooling Water System: Regulate cooling water flow to ensure equipment cooling efficiency. Quick-installation butterfly valves (e.g., D81F type) facilitate maintenance and reduce downtime.
3. Rolling Mill and Heating Furnace
- Heating Furnace Ventilation System: Control high-temperature air/fuel mixed gas flow. Requires high-temperature, low-resistance electric ventilation butterfly valves (e.g., ceramic lined butterfly valves) to adapt to frequent opening and closing.
- Hot Rolling Production Line Hydraulic System: Regulate hydraulic oil flow for precise control of roll pressure. Adopts triple offset electric butterfly valves to ensure sealing performance and service life under high pressure.
4. Flue Gas Treatment and Waste Heat Recovery
- Desulfurization and Denitrification System: Treat acidic flue gas containing SO₂ and NOx. Requires corrosion-resistant 2507 duplex steel butterfly valves to withstand high-pressure differentials and chemical corrosion.
- Waste Heat Boiler Steam Pipeline: Control high-temperature steam flow. Metal-seated butterfly valves are resistant to high temperatures and scouring, ensuring waste heat recovery efficiency.
5. Circulating Water and Wastewater Treatment
- Circulating Water System: Transport cooling water containing suspended solids. Requires abrasion-resistant slurry butterfly valves (lined with rubber or polyurethane) to prevent particle wear and leakage.
- Wastewater Discharge System: Treat wastewater containing heavy metal ions. Select corrosion-resistant fully lined fluorine butterfly valves to ensure environmental compliance.
6. Coal Gas and Energy Transmission
- Blast Furnace Gas Pipeline: Transport high-temperature, dust-laden coal gas. Requires bi-directional sealing, anti-coking, metal-seated butterfly valves (e.g., triple offset design) to prevent gas leakage and safety incidents.
- Steam Pipe Network: Control high-pressure steam flow. Adopts metal-seated butterfly valves to adapt to high-temperature and high-pressure conditions.
Selection Criteria
- Material: Prioritize 316L stainless steel, 2507 duplex steel, or PTFE lined butterfly valves to meet corrosion and high-temperature resistance requirements.
- Sealing Design: Metal-to-metal seal or flexible graphite seal to ensure zero leakage at high temperatures.
- Actuation: Pneumatic (fast response) or electric (precise control) actuators, supporting remote control and automation integration.
- Structure: Lug-style (easy installation) or quick-installation (easy maintenance) design. For special conditions, rubber-lined or ceramic-lined structures can be selected to enhance wear resistance.
High-performance butterfly valves in steel plants can significantly improve production efficiency, reduce energy consumption, and ensure safe operation in high-temperature, high-pressure, and corrosive environments. They are core equipment for optimizing process control and environmental management.
Contact Shengfei today for high-quality butterfly valve solutions tailored to your steel plants needs.
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