Ladle Refining Furnace VS Ferroalloy Refining Furnace

Ladle Refining Furnace

Ladle refining furnace is important metallurgical equipment used to refine the molten steel melted in the primary smelting furnace (electric arc furnace, open-hearth furnace, and converter), and can adjust the molten steel temperature and buffer the process, so as to meet the requirements of continuous casting and continuous rolling. Ladle furnace is one of the main pieces of equipment for refining outside the furnace.

Main Functions of Ladle Refining Furnace

1. The temperature rise of molten steel and heat preservation function. 

Liquid steel is heated by an electric arc to obtain new heat energy, which can not only add alloy and adjust composition but also add slag during ladle refining, which is convenient for deep desulfurization and deoxidation of liquid steel. 

Moreover, the start pouring temperature of liquid steel required by continuous casting is guaranteed, which is conducive to the improvement of dry slab quality.

2. Argon stirring function. 

Argon is blown into the molten steel through the permeable brick installed at the bottom of the ladle, and the molten steel obtains a certain mixing function.

3. Vacuum degassing function. 

After the ladle is lifted into the vacuum tank, the steam jet pump is used for vacuum degassing, and argon is blown into the ladle bottom to stir the liquid steel, which can remove the hydrogen content and nitrogen content in the liquid steel, further reduce the oxygen content and sulfur content, and finally obtain the liquid steel with high purity and materials with superior performance. 

For the whole enterprise, the application of a ladle refining furnace can at least increase the following benefits: speed up the production rhythm and improve the efficiency of the whole metallurgical production.

Application: 

Ladle refining furnace is widely used in industry, steel, metallurgy, and other industries.

Ferroalloy Refining Furnace

Ferroalloy refining furnace is the main equipment for smelting ferroalloy. Ferroalloy electric furnaces are divided into reduction electric furnaces and refining electric furnaces. 

Reduction electric furnace, also known as submerged arc furnace or submerged arc furnace, adopts the submerged arc operation of inserting an electrode into furnace charge. The reduction electric furnace has open, closed (or semi-closed), and the furnace body has various forms such as fixation and rotation. 

Electric refining furnace is used to refine medium carbon, low carbon, and micro carbon ferroalloys. The capacity of an electric furnace is generally 1500 ~ 6000 KVA, which adopts the form of open fixing or tilting with cover. 

The former is similar to the reduction furnace and can be equipped with a continuous self baking electrode; The latter is similar to an electric arc steelmaking furnace, using graphite or carbon electrode.

Equipment Features

The capacity of an electric furnace is generally 1500 ~ 6000 KVA, and its structure is divided into two forms:. The utility model is similar to an electric arc furnace, which uses graphite or carbon electrodes and has the function of electricity. Arc heating, furnace tilting, tapping, slag raking, and matching process require that the furnace top can be fed.

The other is similar to the reduction electric furnace, which is equipped with continuous self baking electrodes. The furnace body has various forms such as fixed and rotating, and adopts the form of closed (or semi-closed) fixed furnace cover; The operation of an automatic feeding system for tapping, slag raking, and smelting process is consistent with that of reduction electric furnace.

Equipment Composition

Transformer, short net, conductive cross arm (holder), lifting column, furnace body, furnace cover (smoke hood), tilting mechanism (furnace rotating mechanism), cooling water system, hydraulic system, furnace top charging device, heat matching car, tapping device, batching system, electric furnace automatic control system, etc.

Application

It is mainly used for desilication refining of ore, high silicon, and low carbon ferroalloy remanufacturing products and flux, so as to obtain medium carbon, low carbon, and micro carbon ferroalloy products. 

At present, it is used for smelting ferroalloy products such as medium chromium, low chromium, low micro chromium, medium and low carbon ferromanganese, metal manganese, ferrotungsten, ferronickel, high titanium slag, rare earth alloy, and zirconium.

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