Description
Submerged Arc Furnace Carbon-Oxygen Lance
High-Efficiency Chemical Energy Input by HANI Metallurgy
Enhancing Smelting Kinetics with HANI Carbon-Oxygen Lances
The Submerged Arc Furnace Carbon-Oxygen Lance is a critical technological tool designed to introduce chemical energy and reagents directly into the furnace hearth. As a high-performance SAF lance, it facilitates the injection of oxygen for decarburization and carbon for slag foaming and reduction. At HANI, we have engineered world-class injection lance solutions that utilize supersonic nozzle technology and advanced water-cooling to survive the extreme temperatures of the electric arc zone. Our Submerged Arc Furnace Carbon-Oxygen Lance is designed to optimize the smelting kinetics, reduce electricity consumption, and improve alloy recovery rates by promoting a vigorous metallurgical reaction within the molten pool.
HANI’s Submerged Arc Furnace Carbon-Oxygen Lance is manufactured using high-conductivity forged copper tips and heavy-duty stainless steel shafts. Whether for high-carbon ferrochrome or stainless steel refining, the SAF lance must provide a stable and controllable jet of gas or solids. Our injection lance units feature a specialized multi-hole nozzle design that ensures a broad reaction area and prevents localized refractory erosion. By utilizing HANI’s chemical energy technology, producers can achieve up to 15% lower tap-to-tap times and a significantly more uniform alloy chemistry. As a global leader in furnace auxiliary equipment, HANI provides Submerged Arc Furnace Carbon-Oxygen Lance solutions that are essential for modern high-intensity decarburization and smelting operations.
Technical Parameters of HANI Carbon-Oxygen Lances
| Technical Metric | Unit | HANI-COL-SUPER | HANI-COL-STD | HANI-COL-REFINING |
|---|---|---|---|---|
| Oxygen Flow Rate | Nm³/h | 2000-4000 | 1000-2500 | 500-1500 |
| Carbon Injection Rate | kg/min | 20-50 | 10-30 | N/A (O2 Only) |
| Mach Number (supersonic) | – | 2.0-2.5 | 1.5-2.0 | Subsonic |
| Cooling Water Req. | m³/h | ≥40 | ≥30 | ≥25 |
The Physics of Supersonic Gas Injection
The performance of a Submerged Arc Furnace Carbon-Oxygen Lance is determined by its jet penetration depth and mass transfer efficiency. In an SAF lance, the oxygen must be delivered at supersonic velocities to penetrate the slag layer and reach the molten metal interface for effective decarburization. HANI’s injection lance utilizes a Convergent-Divergent (De Laval) nozzle design that converts high-pressure potential energy into kinetic energy, ensuring that the oxygen jet does not dissipate before reaching the reaction zone.
Smelting Kinetics Principles:
1. Supersonic Impact: High Mach number jets ensure deep decarburization within the metal pool.
2. Slag Foaming: Carbon injection promotes CO gas bubbles, increasing slag volume and electrical resistance.
3. Exothermic Balance: Utilizing chemical energy to reduce the electrical load of the Submerged Arc Furnace Carbon-Oxygen Lance.
Scientific facts show that chemical energy from an SAF lance can provide up to 30% of the total thermal requirement in high-intensity smelting. HANI’s Submerged Arc Furnace Carbon-Oxygen Lance ensures that your decarburization process is optimized for maximum speed. Our injection lance solutions also include automatic slag-line detection and robotic positioning to ensure that the lance is always at the optimal height for oxygen delivery and refractory protection.
Key Advantages of HANI Injection Technology
- Highest Jet Cohesion: Our Submerged Arc Furnace Carbon-Oxygen Lance maintains its supersonic core over a greater distance, providing superior decarburization depth.
- Thermal-Resistant Tip Design: HANI’s SAF lance utilizes high-purity forged copper with internal cooling fins, extending tip life by over 300%.
- Precise Multi-Phase Injection: HANI provides bespoke injection lance systems capable of delivering O2, Carbon, and fluxing agents simultaneously for complex refining.
Professional FAQ for SAF Injection Lances
Q1: Why is decarburization more efficient with a supersonic Carbon-Oxygen Lance?
A: Supersonic jets from the Submerged Arc Furnace Carbon-Oxygen Lance overcome the buoyancy of the slag and reach the metal surface where the carbon-oxygen reaction is fastest, leading to rapid decarburization.
Q2: How does HANI prevent nozzle clogging in the injection lance?
A: We utilize a high-pressure “Purge-Flow” logic in our SAF lance control system, ensuring that a minimum gas flow is maintained at all times to prevent molten metal from entering the injection lance nozzle.
Q3: What is the typical life expectancy of a HANI SAF lance tip?
A: With HANI’s advanced water-cooling and high-conductive copper, our Submerged Arc Furnace Carbon-Oxygen Lance tips can deliver between 500 to 1000 heats before requiring tip replacement.
Master Your Chemical Energy Input with HANI
The Submerged Arc Furnace Carbon-Oxygen Lance is the key to achieving high productivity in modern smelting. Partner with HANI for a world-class injection lance solution that ensures speed and efficiency today.
