Agent Injection System for Hot Metal Desulfurization

Product Specifications

Technical details and manufacturing context for Agent Injection System

Definition

The Agent Injection System is a component within an integrated hot metal desulfurization and slag treatment system. It is designed to inject powdered desulfurizing agents, typically calcium-based compounds such as CaO, CaC₂, or Mg, into the hot metal stream or ladle. This injection facilitates the chemical reaction that removes sulfur from molten iron, a critical step in producing high-quality steel with low sulfur content. The system operates by using a carrier gas, such as nitrogen or argon, to pneumatically convey the powdered agents from storage hoppers through injection lances that are submerged into the molten metal. The high-velocity gas stream creates turbulence, ensuring thorough mixing and contact between the agent particles and the sulfur dissolved in the hot metal, leading to the formation of sulfide slag that can be separated. The system is available in configurations with rated capacities from 5 to 20 t/h, operating pressures from 1.0 to 1.6 MPa, and injection accuracy of ±2%. It requires a three-phase 380 V AC ±10% power supply (per IEC 60038) and operates in ambient temperatures from -20 to 60°C. The enclosure provides ingress protection from IP54 to IP65 (per IEC 60529). Wetted parts are made of stainless steel grade 316L (per ASTM A240), while other components may be carbon steel or refractory-lined steel. The system weighs between 800 and 1500 kg and has a footprint of 2.5 to 4.0 m². These values are reference ranges and must be verified with the legal manufacturer or supplier for specific models and applications. The system is intended for use in basic metal manufacturing, particularly steelmaking, and is not a standalone product but a component of a larger desulfurization system.

Working Principle

The Agent Injection System uses a carrier gas (nitrogen or argon) to pneumatically convey powdered desulfurizing agents from storage hoppers through injection lances. The lances are submerged into the molten metal, and the high-velocity gas stream creates turbulence, ensuring thorough mixing and contact between the agent particles and the sulfur dissolved in the hot metal. This promotes the chemical reaction that forms sulfide slag, which can be separated from the molten metal. The system's injection accuracy of ±2% ensures consistent desulfurization, and the operating pressure range is 1.0–1.6 MPa.

Common Materials

Carbon steel, Refractory-lined steel, Stainless steel (for specific wetted parts)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Capacity	5–20 t/h	Matches steelmaking furnace size
Injection Accuracy	±2 %	Ensures consistent desulfurization
Power Supply	380 ±10% V AC	Three-phase, 50 HzIEC 60038
Operating Temperature	-20–60 °C	For control cabinet and instrumentation
Ingress Protection	IP54–IP65	Dust and splash water protectionIEC 60529
Material Grade	316L	Corrosion-resistant for molten metalASTM A240
Weight	800–1500 kg	Depends on configuration
Footprint	2.5–4.0 m²	Compact for retrofit

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

Agent Storage Hopper
Stores the powdered desulfurizing agent and feeds it into the injection line.

Material: Carbon steel
Rotary Feeder / Screw Feeder
Precisely meters and controls the flow of agent powder from the hopper into the carrier gas stream.

Material: Abrasion-resistant alloy steel
Injection Lance
A refractory-lined pipe that delivers the agent-gas mixture deep into the molten metal bath.

Material: Refractory-lined steel pipe
Carrier Gas Supply System
Provides a controlled flow of inert gas (N₂, Ar) to transport the agent powder.

Material: Stainless steel (piping), Carbon steel (tanks)

Manufacturers of Agent Injection System

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Frequently Asked Questions

What is the typical capacity range of the Agent Injection System?

The rated capacity is typically between 5 and 20 t/h, depending on the configuration and the size of the steelmaking furnace. This is a reference range; the exact capacity must be confirmed with the manufacturer for a specific model.

What materials are used in the construction of the system?

The system may be constructed from carbon steel, refractory-lined steel, or stainless steel. Specifically, wetted parts are made of stainless steel grade 316L (per ASTM A240) to resist corrosion from molten metal. Other components may use carbon steel or refractory-lined steel.

What are the electrical and environmental requirements?

The system requires a three-phase 380 V AC ±10% power supply (per IEC 60038) and operates in ambient temperatures from -20 to 60°C. The enclosure provides ingress protection from IP54 to IP65 (per IEC 60529), offering dust and splash water protection.

How is the system verified for compliance?

The operating pressure is referenced to, the power supply to IEC 60038, and the ingress protection to IEC 60529. These standards are procurement references; the legal manufacturer or supplier must confirm that the specific model meets these standards.

Data Basis

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

Preliminary Technical Classification

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pressure:	Max 10 bar (injection pressure)
flow rate:	0.5-5.0 L/min (agent slurry)
temperature:	1400-1600°C (typical molten steel range)
slurry concentration:	15-40% solids by weight

Agent Injection System

Product Specifications

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Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

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