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Cored wire is used to purify the steel and improve its performance and cleanliness through various additions, etc. With the development of cored wire technology in steelmaking outside the furnace refining has been widely used. Cored wire technology is a general term for cored wire manufacturing technology and cored wire use technology (or wire feeding technology). It is first in the core line manufacturing plant will want to participate in the steel or iron of various additives (deoxidizer, desulfurizer, metamorphosis agent, alloy, etc.) crushed into a certain particle size, and thin steel belt will be wrapped into a core line with as much length as possible, with the help of feeding machine to make this core line at a certain speed through the slag layer, arriving with steel or iron ladle or iron ladle, or the bottom of the furnace near the steel or iron water.

Following the continuous melting of the core line wrapper, the additive wrapped around it slowly over the mouth, steel or iron water, through the interaction between the additive and its surrounding steel or iron water, as well as through the inert gas drummed into the bottom of the ladle stirring or medium frequency furnace itself alternating magnetic field electromagnetic stirring and then arrive at the steel or iron water for the purpose of deoxidation, desulfurization, micro-alloying, and metamorphosis treatment.

Therefore, from the metallurgical point of view, the core wire feeding technology is a set of quenching, micro-alloying, alloy composition fine-tuning, and metamorphosis treatment in one of the furnace quenching technology, the typical layout of the process equipment.

China's current annual output of 55 million tons of steel, to alloy steel and steel accounted for 15%. Each year, about 8 million tons of steel need to add a variety of additives. At present, about 40,000 tons of aluminum used for final deoxidation alloying every year, the contradiction between supply and demand is getting bigger and bigger, if all adopt this technology to feed aluminum wire can save 20,000 tons of aluminum, this one can save 160 million yuan. Therefore, this technology is not only a reform of the deoxidation process, but also a new way of steel alloying, which will bring obvious economic benefits to the manufacturers. The wire feeding technology, started in the 80s. Initially used to add rare earth wire, and later developed to continuous casting of small billet aluminum fine tuning, ladle high-speed feeding aluminum wire.