The addition time of carbon additive needs to be grasped
所属分类： Industry News
发布时间：2024-06-04
The use of carburizers in castings can greatly increase the amount of scrap steel, reduce the amount of pig iron, or eliminate the use of pig iron. In the electric furnace smelting and feeding method, the carbon additive should be placed in the furnace together with the scrap steel and other ingredients. Small doses can be added on the surface of molten iron. However, a large amount of molten iron should be avoided to prevent excessive oxidation, which may result in unclear carbonization effect and insufficient carbon content in castings. The amount of carbon additive added should be determined based on the ratio of other raw materials to carbon content. Different types of cast iron require the use of different types of carburizers as needed. Based on the characteristics of the carbon additive itself, selecting pure carbon containing graphitic materials can reduce excessive impurities in pig iron, and the choice of carbon additive can lower the production cost of castings.
The function of a carbon additive is to increase the carbon content in castings, cast iron, cast steel, and cast iron. As the name suggests, a carbon additive is used to increase the carbon content in molten iron. For example, it is commonly used in smelting furnace materials such as pig iron, scrap steel, recycled materials, and iron with high carbon content but relatively high purchase prices for scrap steel. Therefore, increasing the supply of scrap steel, reducing the amount of pig iron, and increasing the carbon additive can reduce the cost of castings.
Yichen Carbon Enhancer
There are many types of carburizers, and there are also many materials that can be used as carburizers for cast iron, but the quality and price differences are significant. On the premise of ensuring the quality of castings, the casting agent should be selected correctly according to the characteristics and quality requirements of the enterprise's products.
The addition time of carbon additive cannot be ignored. If the carbonization agent is added too early, it is easy for it to adhere to the bottom of the furnace, and the carbonization agent attached to the furnace wall is not easily melted into the molten iron. On the contrary, if the carbon addition time is too late, the opportunity to increase carbon will be lost, resulting in slow melting and heating time. This not only delays the analysis and adjustment of chemical composition, but also causes damage due to overheating. Therefore, it is better to add a little metal charge to the carbon additive during the carbonization process.
In the case of a large increase in steelmaking carburizer, it is used in an induction furnace in conjunction with the operation of overheating the molten iron to ensure a 10 minute absorption time of the carburizer in the molten iron. On the one hand, electromagnetic stirring is used to fully diffuse and absorb the carburizer to ensure the absorption effect. On the other hand, the nitrogen content in the carbon enhancer can be reduced.
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