Method of using recarburizer

Recarburizers are the main products of our company. There are different types and a wide range of applications. In the smelting process, the content of steel or iron cannot meet the expected requirements due to improper ingredients and excessive decarburization. Carbon should be added to the steel or iron solution. The main substances used for carbon increase are anthracite powder, carbonized pig iron, electrode powder, petroleum coke powder, pitch powder, charcoal powder and coke powder. The requirement for the recarburizer is that the higher the fixed carbon content, the lower the content of harmful impurities such as ash, volatile matter and sulfur, the better, so as to avoid polluting the molten iron. However, there are still some people who don't know much about recarburizers, which has affected the development of recarburizers. In order to break this state, our company will summarize the knowledge of carbonizing agent for many years, and give you a brief talk about the selection and use of carbonizing agent. Recarburizer: A product of black or gray particles that is added to a metal smelting furnace to increase the carbon content in the molten iron. On the one hand, it can reduce the oxygen content in molten iron; on the other hand, it is more important to improve the mechanical properties of molten metal or castings.

Recarburizer manufacturers

In the electric furnace smelting feeding mode, the recarburizer should be put into the furnace together with the scrap steel and other ingredients. The addition of small dose can be added on the surface of molten iron. However, a large amount of molten iron should be avoided to avoid excessive oxidation, resulting in insignificant carburization effect and insufficient carbon content in castings. It is used in many industries. Adding recarburizers to steel can effectively improve the hardness and wear resistance of steel. However, if improper use leads to excessive carbon content in the steel, it will also affect the quality of the steel. The use of recarburizers in castings can greatly increase the amount of scrap steel, reduce the amount of pig iron or not use pig iron.

Recarburizer manufacturers

If the product of the recarburizer manufacturer is added too early, it is easy to make it adhere to the bottom of the furnace, and the furnace wall carbon agent that adheres to it is not easy to dissolve iron. On the contrary, the addition time is too late, and the opportunity to increase carbon is lost, leading to melting , The heating time is slow. This not only prolongs the time for chemical composition analysis and adjustment of ferroalloys, but also may lead to the hazards caused by overheating of ferroalloys. Therefore, in the process of adding the metal additive recarburizer, the effect of adding little by little will be better. For example, in the case of a large amount of addition, combined with the overheating operation of the molten iron used in the induction furnace, ensure that the absorption time of the recarburizer in the molten iron is 10 Min. On the one hand, the use of electromagnetic stirring enables the carbon additives to be fully diffused and absorbed to ensure the absorption effect. On the other hand, the nitrogen content in the recarburizer can be reduced.

Under normal circumstances, do not add carbon agent, add in batches. After melting, add a part, put a part of the molten iron (about one bag) into the bag, and then return to the furnace to add the carbon agent 1-2 times, then slag and add the alloy. The adding method is wrong, and the layer-adding carbon agent is used. Avoid adding too much slag to the molten iron mirror, and try not to use too much rust material. The caster made a mistake in choosing the recarburizer. For example, there is confusion between the fixed carbon content and the carbon content of the carbonizer.

The fixed carbon value is calculated based on the moisture, volatile content, ash and sulfur content of the sample, and the carbon content can be obtained by a direct carbon meter. Some recarburizers have high ash content and large carbon content, but their fixed carbon content is not ideal. There are also some foundry workers who judge whether the fixed recarburizer is qualified unilaterally from the carbon content of the fixed recarburizer and its material properties. The result may be biased, making the choice of recarburizer not worthwhile.