Current status of recarburizer application

The recarburizer is mainly used in the steel industry and belongs to the additional steelmaking and iron-making carbon-increasing raw materials. Commonly used carbon refining agents are divided into recarburizing agents for steel making and recarburizing agents for cast iron, and other additives are also useful for recarburizing agents, such as brake pad additives, as friction materials.

The steelmaking recarburizer is a carbonaceous material that is added to make up the carbon content required in the molten steel. The steelmaking recarburizer can be used in cast steel production, electric furnace steelmaking, converter steelmaking, and added to the furnace before smelting, which can greatly increase the amount of scrap steel and reduce the amount of pig iron; when it is tapped, it is added into the steel water tank, which has the function of deoxidation and carbonation. . High-quality recarburizer is an indispensable auxiliary additive for improving the process and improving the quality of molten steel in the steelmaking industry.

The carbon-reinforcing agent for cast iron is mainly used in the foundry industry. The traditional cast iron carbon-increasing process mainly relies on the cupola to smelt the cast iron. The molten iron liquid passes through the hot bottom coke in the form of droplets. The carbon-increasing effect is very good, usually can be adjusted. The bottom coke height, the control charge ratio and the iron temperature to control the amount of carbon increase, it is necessary to use a recarburizer. With the continuous improvement of environmental protection requirements, more and more attention has been paid to resource consumption. The prices of pig iron and coke have been rising, resulting in an increase in the cost of castings. More and more foundries have begun to use electric furnace smelting to replace the traditional cupola smelting. The use of scrap steel in electric furnace smelting can reduce the cost and improve the mechanical properties of the casting, but the type of recarburizer used and the carbon-increasing process play a key role. However, when the induction furnace is used to smelt the cast iron, there is no carbon source in the furnace, and the amount of scrap in the charge is much higher, and the recarburizer is generally indispensable. The variety and characteristics of the recarburizer not only affect the carbonation efficiency, but also have an important impact on the metallurgical quality of the casting.

Refining agents for steelmaking and cast iron, commonly used are artificial graphite, graphitized petroleum coke, ordinary recarburizer, natural graphite, coke, anthracite, and mixtures made of such materials.