How Ladle Refining Furnace Works?

Ladle refining furnace is a secondary refining equipment, usually used in the process after the primary refining furnace. Its a kind of equipment used for steelmaking, mainly used to reduce impurities in molten steel and improve the composition of molten steel.

Refining Furnace Function

LRF is usually used in the intermediate processing process, that is, after the molten steel comes out of the molten iron smelting furnace, it enters the continuous casting machine to make steel billets. Desulfurize and remove impurities from the molten steel melted in the primary refining furnace such as the electric arc furnace and the medium frequency furnace, adjust the proportion of alloy components in the molten steel, and make the alloy composition in the molten steel more accurate. The molten steel refining furnace is mainly used for the smelting of high-quality carbon steel, stainless steel, manganese steel and other metals.

Working Principle of Ladle Refining Furnace

LR refining furnace uses high-frequency induction or resistance to heat the ladle and molten steel, floats the impurity profile in the molten steel under the protective atmosphere in the furnace for easy removal, and adjusts the composition and properties of the molten steel by adding refining agents (such as silicon, aluminum, magnesium, etc.) to reduce the content of sulfur, oxygen, nitrogen and other elements. In addition, the LRF can also solve many problems between steelmaking and continuous casting, such as reducing the tapping temperature, improving the technical indicators of converter smelting, and providing molten steel with accurate and uniform temperature composition for continuous casting, coordinating the rhythm of steelmaking and continuous casting.

The refining furnaces produced and supplied by ladle refining furnace manufacturer Sanrui Electric Furnace, are usually divided into two types: flat bottom type and tilting type. The selection is the result of comprehensive consideration of multiple factors such as the temperature of the molten steel, the pouring form and the process requirements.

Technical Advantages of LRF

1. The ladle refining furnaces uses a large current system with pure copper as the conductive medium, and the resistance of the entire circuit is small. Taking into full consideration the skin effect when the current passes through the conductor, the cross arm adopts a box-type copper-steel composite plate structure, which can effectively reduce the resistance and heat side generation, making the current impedance smaller.

2. The clamping device of the three electrodes is installed in three sets of short arms, which are supported and controlled by a set of cross arms and columns. This method optimizes the cross arm system structure to be simpler, occupy less space, have a lower failure rate, be more convenient to control, more convenient to maintain, and lower cost.

3. The whole set of hydraulic drive is equipped with accumulator, which plays the role of hydraulic system voltage stabilization, making the equipment run more stably. At the same time, in emergencies such as power outages, the unfinished actions of the equipment can continue to be executed, which improves the safety of smelting.

4. The electrical automation control adopts a human-machine interface, which simulates the real furnace form and is easy to operate. Batching, loading, smelting, and steel tapping can all be operated on the computer.

5. With the hot-loading plug rod system of Sanrui, the ladle refining furnace manufacturer, more pouring times, more convenient operation, more convenient installation, and lower cost.

6. Ladle refining furnace can also be equipped with an automatic temperature measurement and sampling system to make operation safer and more convenient.

7. Sanrui Electric Furnace is equipped with a variety of dust removal systems, which can be equipped with different forms of dust removal equipment according to the environmental protection requirements of different countries.

In short, the wide application of molten steel refining furnace has significantly improved the quality of steel, while reducing the cost of steel and environmental pollution.