The new technology and new process of adding carburizing agent in ironmaking must be superior to the traditional one in terms of cost and product characteristics. Adding carburizing agent to metal smelting furnace, that is, using high-quality carburizing agent can be used to produce castings from poor scrap steel smelters. Therefore, we should be cautious in the use of carburizers.
1. High temperature graphitized carburizing agent, such as graphite electrode or graphitized oil coke, should be used as far as possible. As a good carburizer, it has higher digestibility and faster melting speed, which is beneficial to reduce energy consumption, and can reasonably improve the nucleation key of molten iron and improve the quality of metallurgical industry.
2. The nitrogen content of carburizer with high sulfur content is also high. When the nitrogen content in the gray iron melt is higher than the equilibrium concentration value, it is very easy to cause crack like N2 hole, while the gray iron melt is easy to cause shrinkage porosity in the thin-wall part, and the high residual content can enhance the tendency of casting nugget.
3. When selecting, pay attention to the fact that the graphitized carburizing agent after high temperature treatment has a good material quality. If it is not inspected, you can use the touch, eye view, and also can draw very good marks on paper.
