As the name implies, the carburizer is used to increase the carbon content in molten iron. It is used for casting, cast iron, and cast steel. Castings will have a requirement for carbon. Commonly used furnace materials in smelting are pig iron, scrap steel, and recycled materials. Pig iron has a high carbon content. , but the purchase price is higher than that of scrap steel. Therefore, increasing the amount of scrap steel, reducing the amount of pig iron, and adding carburizers can reduce the cost of castings to a certain extent. There are many types of carburizers, and a suitable and appropriate amount of carburizers can be added according to steelmaking requirements. Graphite recarburizer, as one of many recarburizers, is the same as other types of recarburizers. Its main function is to increase the carbon content in steel and improve the quality of steel. So what are the precautions for choosing a carburant? The details are as follows:
1. Fixed carbon and ash content. Fixed carbon and ash are two opposing parameters in the carburant, and they are also two very important parameters that affect the efficiency of carburization. Because there are many factors affecting the production conditions, it is difficult to strictly evaluate the influence of the two parameters on the carburization efficiency. High ash content can inhibit carburization, and it will also increase the amount of slag, thereby prolonging the operation time and increasing the electricity consumption. Consumption, increase the amount of labor in the smelting process. If the fixed carbon content in the carburant is high and the ash content is low, the carburization efficiency will be high, otherwise, the carburization efficiency will be low. From the perspective of carburizing efficiency, it is of course hoped that the fixed carbon content of the carburizing agent should be higher and the ash content should be lower, but at the same time, production cost factors and the impact on the quality of molten iron should also be considered.
2. The influence of joining methods. The addition method of the carburant also has a great influence on the carburization efficiency. When charging, mix the carburant with the furnace charge, and place it on the bottom and middle of the induction furnace, so the carburizing efficiency is high. When smelting gray cast iron in a coreless induction furnace, the target composition of the cast iron, the ratio of various furnace materials and other process factors will all affect the recarburization efficiency of the graphite recarburizer.
The details about the selection of graphite recarburizers are here. I hope that everyone can give full play to the role of graphite recarburizers by paying attention to the application requirements of graphite recarburizers.
