What is EAF slag?

What is EAF slag?

EAF slag is a rock-like material generated during the steel-making process. EAF slag is used as an alternative to rock fragments, both in encapsulated uses (e.g., contained in concrete) and unencapsulated uses (e.g., loose ground cover material). It is commonly used as road base material.

Why slag is important in steel-making?

High-grade steels have high carbon content. To reduce the amount of carbon in the steel, greater oxygen levels are required in the steel-making process. The steel slag produced during the primary stage of steel production is referred to as furnace slag or tap slag. This is the major source of steel slag aggregate.

Is iron slag worth anything?

Domestic Production and Use: Ferrous slags are valuable coproducts of ironmaking and steelmaking. Iron or blast furnace slag accounted for about 60% of the tonnage sold and was worth about $290 million; about 85% of this value was granulated slag.

What are the drastic changes that are being explored in the EAF steelmaking?

So significant changes have taken place in the energy structure in EAF steelmaking process. As the increase of hot metal ratio in EAF steelmaking process in China, the temperature of gas can reach more than 1400℃, and the gas heat increased to 13–20 % of total quantity of heat in EAF steelmaking process.

How does an EAF work?

An electric arc furnace (EAF) is a furnace that heats charged material by means of an electric arc. Arc furnaces differ from induction furnaces, in that the charged material is directly exposed to an electric arc and the current in the furnace terminals pass through the charged material.

What is the purpose of slag?

Slag floats on the surface of the molten metal, protecting it from oxidation by the atmosphere and keeping it clean. Slag forms a coarse aggregate used in certain concretes; it is used as a road material and ballast and as a source of available phosphate fertilizer.

What is slag worth?

How Much Is Slag Glass Worth? Slag glass antique items can run anywhere in value from a low of $50 to a high of $1,500.

Is slag a waste?

Slag. Depending on where you’re from, it may be an insult, a term meaning trash, or, in our case, the waste left over from metal smelting or refining.

What is EAF steelmaking?

An electric arc furnace (EAF) is a furnace that heats charged material by means of an electric arc. Industrial arc furnaces range in size from small units of approximately one-tonne capacity (used in foundries for producing cast iron products) up to about 400-tonne units used for secondary steelmaking.