Development and Smelting of Foundry Pig Iron for Nodular Cast Iron
Author of the article:HUANG Hongqi
Author's Workplace：Maanshan Iron & Steel Co., Ltd., Maanshan 243000, China
Key Words：nodular cast pig iron smelting sintered ore P content blast furnace
Abstract：
The feasibility of smelting of foundry pig iron for ductile iron was studied by investigation and analysis of raw material resources. Aoshan magnetite ore, iron oxide scale and Luobohe iron ore powder were selected as the raw materials for sinter to reduce the P content of sinter. In the process of sinter production, alkalinity, carbon content and other sintering parameters were adjusted. In the process of blast furnace smelting, in order to control the P content in pig iron, the method of reducing clinker rate was adopted, that was, 25% of dashanite ore and 75% of high-basicity sinter, and then a certain amount of silica, manganese ore and other charge structure was added. Finally, the qualified foundry pig iron for ductile iron is successfully produced.
