LRF Ladle Refining Furnace

When it comes to refining molten metal with unmatched precision, our advanced ladle metallurgy furnace delivers superior performance. The LF furnace specification is from 8t to 300t, and has the following conditions and functions:

• The working conditions in the LRF steel making furnace are a reducing atmosphere and a micro positive pressure;    

• The electrode adjustment mode of the ladle refining furnace is three-arm three-phase electrode adjustment;    

• The thermodynamic condition of the ladle heating furnace is graphite electrode arc heating;

• The dynamic condition is argon stirring at the bottom of the ladle;

• This kind of submerged arc furnace process involves adding a certain amount of scrap crushing material into the ladle, heating it with an electric arc, measuring the temperature, and taking samples to make the temperature control accurate, to optimize the pouring temperature;

• Bottom blowing argon stirring to make the temperature of molten steel uniform, the composition uniform, and the molten steel pure;

• Slagging to remove sulfur and inclusions in molten steel;

• Adjust the alloy composition and use the alloy feeding system to make the composition control accurate and the molten LRF steel meet the final required chemical composition;

• Wire feeding treatment: directly feed various wires into molten steel with a wire feeder, which can significantly improve the yield of alloy;

• Smoke exhaust and dust removal. The LRF furnace is equipped with a smoke exhaust and dust removal system, which can effectively control the smoke discharge and make the smoke emission meet the requirements of environmental protection;

• As the ladle refining equipment outside the ladle arc furnace between the primary refining furnace and the continuous caster, it plays a buffer and regulating role in the production process of the whole workshop to ensure that molten steel with a qualified temperature and composition is provided to the continuous caster.

The ladle refining furnace has a strong refining capability and is suitable for producing ultra‑low sulfur and ultra‑low oxygen steels. The ladle metallurgy furnace is equipped with arc heating, providing high thermal efficiency, a wide heating range, and accurate temperature control. The LRF furnace is equipped with stirring and alloying functions, which enable narrow composition control and improve product stability. The process adopts slag–steel ladle refining, resulting in a low refining cost. The ladle arc furnace has a simple structure and requires relatively low investment.

The refining process of a ladle refining furnace mainly includes two aspects:

Heating and temperature control. The heating rate can reach 3-5 ℃/min, and the LRF furnace adopts computer dynamic control of the endpoint temperature, which can ensure the control accuracy of the endpoint temperature (<5 ℃). The submerged arc foam technology can reduce the radiation heat loss of the arc and improve the heating efficiency of the ladle metallurgy furnace.

White slag refining process. The ladle refining furnace uses white slag for refining molten steel, achieving desulfurization and deoxidation of molten steel, and producing ultra-low sulfur steel and low oxygen steel. Therefore, white slag refining is the core of the ladle furnace refining process operation and an important guarantee for improving the cleanliness of molten steel.

LF ladle refining furnace is an important metallurgical equipment used to refine the molten steel in the initial refining furnace (electric arc furnace, open hearth furnace, converter), and can adjust the composition and temperature of the molten steel, process buffering, and meet the production rhythm of continuous casting and rolling. The LF furnace is one of the main pieces of equipment for refining outside the furnace. Upgrade to a ladle metallurgy furnace that maximizes output and minimizes waste.

Ladle Furnace Steelmaking Equipment functions:

• Arc heating and temperature rise under normal pressure;

• Argon stirring (uniform composition and temperature of molten steel);

• Slagging (desulfurization, removal of inclusions);

• Temperature measurement and sampling;

• Adding alloys and adjusting components;
  

• Silk feeding treatment;

As an external ladle refining equipment between the electric furnace and the continuous casting machine, it plays a buffering and regulating role in the entire production process of the workshop, providing qualified steel with temperature and composition to the continuous casting machine, and achieving multi-furnace continuous casting.

Ladle Furnace Refining Equipment structural form:

1）Bridge type;

2）Independent rack type;

3）Large package rotary table;

4）Cross arm rotating type;