What are the requirements for raw material scrap in electric arc furnace steelmaking?


The main raw material of electric arc furnace steelmaking is scrap, which is well known. Not everyone knows about the requirements of electric arc furnace steelmaking for scrap. So today, I have nothing to do. Let me briefly introduce the basic requirements of electric arc furnace steelmaking for raw material scrap!


The main material of electric furnace steelmaking is scrap steel. The quality of scrap steel is directly related to the quality, cost and productivity of steelmaking. Therefore, there are some basic requirements for scrap steel, as follows:


(1) The surface of scrap steel shall be clean with less rust. Because sundries such as sand on scrap steel will reduce the conductivity of the furnace, prolong the melting time, affect the dephosphorization effect of the oxidizer and erode the furnace. If the scrap steel is seriously rusted or stained with oil, it will reduce the yield of steel and alloy elements and increase the hydrogen content of steel.


(2) Scrap steel shall not contain lead, tin, arsenic, zinc, copper and other non-ferrous metals. Lead has high density and low melting point. It is insoluble in liquid steel and is easy to deposit in the gap at the bottom of the furnace, resulting in water leakage accidents. Tin, arsenic and copper are easy to cause brittleness of steel.


(3) Scrap steel cannot be mixed with closed containers, flammable and explosive substances and toxic substances to ensure safe production.


(4) The chemical composition of scrap should be clear, and the content of yellow phosphorus should not be too high.


(5) The scrap shape should not be too large. Pig iron is generally used to increase the ration of charge in electric furnace steelmaking, and the charging capacity usually does not exceed 30% of the charge.


Well, the above is the introduction of the basic requirements for scrap steel in electric arc furnace steelmaking. If you want to know more about electric arc furnace steelmaking, you can follow our official website: http://www.ayynd.com/


Key words: submerged arc furnace DC submerged arc furnace DC electric arc furnace