Sulfur iron

Iron pyrite is also called sulfur iron and sulfur increasing agent in the industry. The main component of sulfur iron is sulfur. It is made by screening high-quality pyrite ore and smelting it in an electric furnace. It is widely used in metallurgical industries such as steelmaking and foundry. , although sulfur is a harmful element for the metallurgical industry, if the steel and cast iron lack sulfur, it will also affect the quality. In the case of certain sulfur deficiency, sulfur iron should be used to increase the sulfur element. In the casting process, in order to make the castings reach Some special properties require a certain proportion of sulfur iron to be added during the smelting process, and adding a certain proportion of sulfur iron to the molten iron can effectively improve the inoculation effect.

Iron sulfur has been well used in steelmaking, because molten steel will lose a part of sulfur in high temperature environment, resulting in the decline of toughness and cutting performance of steel, so it is necessary to add a certain amount of sulfur iron to make up for part of the sulfur lost in molten steel, so that it can recover performance.

Iron sulfur in the casting process has the application of promoting the inoculation effect and improving the distribution of graphite. Putting a proportion of iron sulfur in the molten iron can effectively improve the inoculation effect, increase the number of eutectic pellets, and improve the distribution of graphite in the casting. A-B, it is generally believed that when the sulfur content is less than 0.05% during casting, it is necessary to add sulfur iron to ensure the inoculation effect.

 

The role of iron sulfur: According to the characteristics of steel use, some steel needs to have a certain sulfur content. The traditional steelmaking production method is to artificially deteriorate the refining slag by sacrificing the good performance of strong deoxidation and purification of high-basic refining slag in the steelmaking process to obtain better sulfur increasing performance, and then add sulfur iron to the slag At this time, the sulfur content in molten steel is increased through the sulfur-increasing performance of the deteriorating refining slag at this time. The steel produced by this method has high oxygen content and many inclusions, which seriously affects the purity of the steel, but it can ensure the sulfur content in the steel Quantitative stability.