Recarburizer ly2015.1 main points of graphite and carbon additive nongraphitizable recarburizer two categories. Graphitized carbon agent: waste graphite electrodes, graphite electrode scrap and debris, natural graphite pressure tablets, graphitized coke and silicon carbide. Nongraphitizable recarburizer: pitch coke, calcined petroleum coke, acetylene coke and calcined anthracite pressure tablets. Recarburizer accordance casting purposes, the use of materials and methods can be divided into the following specific: 1. Press the casting zoning 1) ductile iron recarburizer: C> 98.5 S90 S <0.5 mainly non-graphitized calcined petroleum coke and coal. The absorption rate of about 85%. 3) steel recarburizer: C 75-98 mainly calcined coal, graphite and natural graphite broken ball. 4) Special recarburizer: for the brakes and cored wire. Generally 0-0.5 / 0.5-1 mm petroleum coke. 2. Material 1) metallurgical coke carbon agent: for the cupola with a large Coke 2) calcined coal recarburizer: prolific in Ningxia and Inner Mongolia C 90-93 S 0.3-0.5 (for steel and gray iron) 3) petroleum coke carbon agent: prolific in Liaoning, Tianjin and Shandong C 96-99 S 0.3-0.7 (for steel, gray iron and special recarburizer) 4) graphitized petroleum coke: prolific in Shandong and Henan, and import C 98-99.5 S 0.03-0.05 include graphitized petroleum coke and graphite-based electrodes (for ductile iron) 5) natural graphite carbon agent: prolific in Hubei and Shandong, C 65-99 (for refining steel) 6) Composite recarburizer: In graphite, coke and petroleum coke as raw man-made C 93-97 S 0.09-0.7 Company Website: http: //www.opopym.com