How do you lower phosphorus in an induction furnace?

To control the phosphorous amount high basicity is needed. So by adding CaO in the form of limestone, a high basicity of 3.5 has been maintained. For phosphorous removal high oxidizing potential is also needed in the bath. This is achieved by using synthetic slag (LD slag) and DRI in the charge material.

Which current is responsible for melting the metal in induction furnace?

An induction furnace uses alternating current passing through a coil to develop a magnetic field in the metal, and the resulting induced current results in a rapid heating and melting of the metal. The electromagnetic force field causes a mixing action to occur in the liquid metal.

How is phosphorus removed from iron ore?

Acid leaching is the most efficient method for removal of phosphorus from iron ore. Among the tested acids, sulfuric acid is the most effective for this purpose. The leaching time is low (~20 minutes) and the iron loss is negligible (less than 0.25\%).

What is Dephosphorization process?

The dephosphorization processes (reduction in the phosphorus content) of pig iron consist in oxidizing the phosphorus and combining it with calcium and other components, which are injected into the hot metal deeply, resulting in compounds which are transferred to the slag and, thus, removed from the metal.

Can you melt steel with electricity?

About one-quarter of the world’s steel is produced by the electric-arc method, which uses high-current electric arcs to melt steel scrap and convert it into liquid steel of a specified chemical composition and temperature.

Which is the main drawback of induction furnace in refining of steel?

The one major drawback to induction furnace usage in a foundry is the lack of refining capacity: charge materials must be free of oxides and be of a known composition, and some alloying elements may be lost due to oxidation, so they must be re-added to the melt.

How is phosphorus oxide removed from molten iron?

In a typical dephosphorization process, phosphorus present in hot metal or molten steel is oxidized with oxygen gas or iron oxide and the phosphorus oxide is removed by being trapped in CaO-based slag. The oxidation of phosphorus in hot metal or molten steel with oxygen gas also oxidizes iron.