In fact, in the early stage of steel smelting, some oxygen will be added to the calcined coke to remove the carbon in the molten iron and transform the molten iron into molten steel. However, the carbon content is reduced in the later stage, and some carbon needs to be added to improve the quality of the steel, which requires some addition. Carbon agent. There are also some practical problems in the manufacturing process, which need to be solved by relevant researchers. Colleagues or friends in this industry may be very clear, but most people still don't know much about this industry. This is because many friends are not particularly clear about the value of recarburizers. Next, we will listen to the recarburizer manufacturers to talk about the value, which is still very detailed. I hope it will be helpful to you. High temperature asphalt
1. Furnace input method:
Disperse adding method: According to the ratio or carbon equivalent requirements, add the charge to the middle and lower part of the electric furnace, a layer of metal material, and a layer of recarburizer. When the recarburizer is melted, there is no slagging.
Concentrated addition method: only part of the charge is melted. When the temperature of the molten iron is low, all the recarburizers are added to the molten iron at one time, and the solid charge is used to press it into the molten iron at the same time.
2. Carbon increase method outside the furnace:
Graphite spray in the package: Graphite spray to increase carbon, generally nitrogen is used as the carrier, but under industrial production conditions, it is more convenient to use compressed air, and the oxygen in the compressed air burns to produce CO, and the chemical reaction heat can compensate for part of the temperature drop, and CO The reducing atmosphere is conducive to improving the carbon effect.
Add when tapping: Put the recarburizer with a particle size of 0.5-1.0mm into the ladle or flush it in from the iron trough, and stir thoroughly after tapping the molten iron.
The recarburizer is used in casting, which can greatly increase the amount of scrap steel, reduce the amount of pig iron or eliminate the need for pig iron. Most recarburizers are suitable for electric furnace smelting, and a small part of recarburizers with a particularly fast absorption rate are used in cupolas. In the feeding method of electric furnace smelting, the recarburizer should be put in with the scrap steel and other charge, and small doses can be added to the surface of the molten iron.
The proportion of enterprises using recarburizers in forging is getting higher and higher, but sometimes when using recarburizers, the expected actual results cannot be achieved. What must be paid attention to when purchasing semi-graphitized recarburizers for forging?
The first is to purchase recarburizers based on forging furnaces;
We know that the use of recarburizers during forging is an indispensable raw material for the beneficiation plant. Therefore, the recarburizers must be carefully selected. Only the recarburizers suitable for their forging can be used to achieve good practical results.
The second is that the water content of the recarburizer should be combined with the requirements;
When we buy recarburizers, we must first clarify the required content. We cannot blindly follow the trend to buy semi-graphitized recarburizers. Common low-sulfur and low-nitrogen enhancers can better reduce the water content of harmful substances and ensure the quality of castings. .
One point is that the forging effect of semi-graphitized recarburizer is very good;
Semi-graphitized recarburizer used for forging is a very rational non-ferrous metal product. Semi-graphitized recarburizer can increase the internal element absorption rate of castings and improve the quality of steelmaking furnaces.