industry is an ancient and emerging industry，basic parts industry of machinery industry and manufacturing industry，determine useful time and sturdiness of mechanical equipment and a variety of production equipment.
Through thousands of years of production practice and experience accumulation，scientific research from the understanding of the surface to the microscopic theory has made great development,constantly improve the problems appeared in the process of metal foundry production，complete steadily the analysis of the technical parameters and control，can make the metal foundry perfect ,and ensure the service life and robustness of mechanical equipment . If want toproduce qualified and high quality metal foundry. First ，understand and study the factors of influencing the performances of iron metal foundry，how to improve purity of molten iron.
-The control of sulfur content, prevent the formation of sulfur eutectic;
-Solve the air hole of smelting which produced by dissolved oxygen;
-Limit trace elements under disturbance variable;
Control of phosphorus content, prevent the formation of phosphorus eutectic.
The passage above talks about the way how to solve the factors that affect themetal foundry.