Which refractory is used in electric arc furnace?
Electric Arc Furnace (EAF) Refractory The furnace is typically lined with resin-bonded magnesia-carbon products. This permits the EAF operator to run with slags that are neutral to very basic in composition. Electric arc steelmaking uses magnesia-chrome compositions in part or total to handle their specific needs.
What material is produced in an electric arc furnace?
steel plates
The electric-arc furnace (EAF) is a squat, cylindrical vessel made of heavy steel plates. It has a dish-shaped refractory hearth and three vertical electrodes that reach down through a dome-shaped, removable roof (see figure). The shell diameter of a 10-, 100-, and 300-ton EAF is approximately 2.5, 6, and 9 metres.
What is an electric arc furnace used for?
An Electric Arc Furnace (EAF) is used in steelmaking to heat charged material (scrap metal) by means of an electric arc. Furnace temperatures can reach 3200°F (1760°C).
What is the function of the refractory lining?
One particular refractory product to consider is the refractory lining, which is a protective layer inside the kiln or furnace that acts as a form of insulation to withstand high temperatures. It can also protect the structure from thermal shocks, abrasion and chemical attack.
What is arc in electric arc furnace?
An electric arc furnace is a steel making plant that melts iron sources such as scrap and direct-reduced iron (DRI) using electric energy.
Why are refractories important to the electric arc furnace?
Refractories are those materials which withstand high temperature without a significant change in chemical or physical properties. Refractory materials are very important to the electric arc furnace (EAF) operation as they allow the containment of the liquid steel in the furnace hearth without damaging the furnace structure.
What is the life of an arc furnace?
Electric Arc Furnace life refers to the life of furnace roof. After the 1980s, with the expansion of steel-making electric arc furnace capacity and the increase of unit power, the working conditions of the furnace roof become more demanding, the refractories used for electric Arc furnace also changed.
What kind of materials are used in electric arc furnaces?
This said (and detailed), the chapter continues with a discussion of the CO2emissions of the electric arc furnaces. A reference is be made to the use of alternative raw materials, as DRI/HBI, pig iron and hot metal.
What causes the lining of an arc furnace to crack?
Spalling – Refractory wear due to spalling takes place when the refractory is subjected to rapid heating or rapid cooling. Rapid heating or rapid cooling cause stresses in the lining and when these stresses exceed the inherent strength of the refractory material, then it results into the cracking.