Product Overview
The 70T Ladle Refining Furnace (LRF) is a secondary refining unit designed for medium-to-large scale steel mills, electric arc furnace (EAF) production lines, and continuous casting systems. Positioned after the primary furnace (EAF or BOF), it is primarily used for thermal compensation (reheating), precise composition adjustment, deoxidation, desulfurization, inclusion removal, and temperature homogenization.
In modern steelmaking workflows, the 70-ton LRF serves as a critical link between primary melting and continuous casting, playing a vital role in enhancing molten steel quality stability and ensuring a continuous production rhythm.
Working Principle
The 70T LRF employs a three-phase electric arc heating system, where electrodes create a submerged arc between the molten steel and the refining slag to provide effective thermal compensation. Simultaneously, an argon stirring system at the bottom of the ladle induces a stable circulating flow within the melt. The entire refining process is conducted under a controlled atmosphere and specialized refining slag to ensure consistent and reliable steel quality.
Technical Features
Enhanced Thermal Compensation for Large-Tonnage Melts
- Arc heating power is precisely matched to the 70-ton molten steel capacity.
- Effectively compensates for heat loss during transportation and idle periods.
- Meets the stringent temperature window requirements for continuous casting.
High-Efficiency Argon Stirring System
- Bottom-blown argon promotes global circulation of the molten steel.
- Improves homogenization of temperature and chemical composition.
- Facilitates the aggregation, flotation, and removal of non-metallic inclusions.
Precise Alloying and Composition Control
- Supports batch-wise and quantitative addition of alloy materials.
- Reduces alloy burn-off (oxidation) rates.
- Enhances composition control precision and minimizes fluctuations.
Optimized for Continuous Production Rhythms
- Matches the production cycles (takt time) of EAFs and continuous casters.
- Provides a production buffer to improve overall line stability.
- Helps maximize capacity utilization.
Product Advantages
Significant Improvement in Steel Quality Consistency
- By performing refining, reheating, stirring, and composition trimming, the 70T LRF effectively minimizes temperature deviations and composition inhomogeneities, reducing the risk of defects in continuous casting and improving finished product stability.
Optimization of Overall Steelmaking Process Efficiency
- By separating the refining stage from the primary furnace, the EAF/BOF can focus on high-efficiency melting while the LRF focuses on quality control. This enhances the operational efficiency of the entire production line.
Stable and Controllable Energy Efficiency and Environmental Performance
- Targeted thermal compensation prevents over-heating of the steel. Argon stirring increases metallurgical reaction efficiency, reducing unnecessary energy loss. Can be integrated with dedusting and fume treatment systems.
Application Scenarios
Medium-to-large EAF steelmaking production lines.
Refining support systems for converter (BOF) steelmaking.
Continuous casting and rolling (CCR) production lines.
Large-scale production of alloy steel and structural steel.
FAQ
Q1: Which equipment is typically paired with a 70T LRF?
A: It is usually paired with an Electric Arc Furnace (EAF) or a Basic Oxygen Furnace (BOF) and serves as the link to the continuous casting system.
Q2: How important is temperature control during refining?
A: Temperature control directly impacts the stability of continuous casting and the quality of the final product; it is one of the core functions of the LRF.
Q3: Can higher-level automation systems be configured?
A: Yes. PLC systems, data acquisition, and remote monitoring can be configured based on customer requirements.
Q4: Is non-standard customization supported?
A: Yes. We offer customized designs based on steel grades, production capacity, workshop layout, and process routes.
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