Cast iron carburizing agent is a kind of additive for steelmaking, which can greatly increase the amount of scrap steel, reduce the dosage of pig iron or do not use pig iron. The use of calcined petroleum coke in steelmaking can not only reduce the use of pig iron, but also increase the utilization of scrap steel. Carburizing agent is an essential carbon addition material for producing high quality steel. Different types of cast iron are selected, and different types of carburizing agents are selected according to needs.
At present, the vast majority of recarburizer are suitable for electric furnace melting, and some of the fast absorption carburizing agents are used in cupola. The feeding way of electric furnace smelting should be carburized with the burden of steel and other materials. The small dosage can be added to the surface of molten iron. However, it is necessary to avoid bulk feeding into molten iron to prevent excessive oxidation. The amount of calcined petroleum coke is determined according to the ratio of other raw materials and carbon content. The characteristics of carburizing agent itself choose pure carbon graphitized material, reduce too much impurity in pig iron, and the selection of carburizing agent can reduce the cost of casting production.
The requirement of recarburizer for foundry steelmaking is high carbon content, high carbon content, low sulfur content, stable carburizing effect and high carbon absorption rate. It can be used in various electric furnaces to smelt cast steel and cast iron, and bring considerable economic benefits to production. But do you know what kind of carburizing agent is good carburizing agent? First, the appearance of the carburizer, clean and impurity-free.
Steelmaking recarburizer for casting, cast iron, cast steel, cast will have a requirement for carbon, then recarburizer just as its name implies is to increase the carbon content in liquid iron, and, for example, commonly used in smelting furnace charge for pig iron, scrap steel, back to the furnace charge, iron carbon content is high, but relatively scrap purchase price is higher section, so adding scrap supply, reduce the quantity of pig iron, add recarburizer, can have certain effect to reduce the casting cost.
Below by yu da energy conservation for you to introduce.
In the process of smelting, the carbon content of steel does not meet the requirements of the top period due to improper mixing or charging and excessive decarbonization, etc. At this time, carbon is added to the steel solution.
Common carbon - increasing agents are carbon - increasing pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder.In converter smelting, high - carbon steel, the use of oil coke containing few impurities as a carbonizing agent.
The requirements for the top blown converter steelmaking use of the carburizer are high fixed carbon, low ash, volatile and sulfur, phosphorus, nitrogen and other impurities, and dry, clean, moderate particle size.
Recarburizer is suitable for smelting in induction furnace, but its application is different according to the technical requirements.
(1) in the smelting process of medium-frequency electric furnace, the use of carbon intensifier can be added to the lower part of the furnace with the material in accordance with the requirements of proportion or carbon equivalent, and the recovery rate can reach more than 95%;
(2) if the lack of carbon adjustment, the first dozen net furnace slag, plus carburant, by raising the temperature of molten iron, or artificial electromagnetic stirring to dissolve carbon absorption, the recovery rate is around 90%, if the low-temperature carbonization process, the melt furnace charge only part of the molten iron liquid under the condition of low temperature, all recarburizer one-time in liquid iron, at the same time with solid charge to press it into the liquid iron don't let it show liquid iron surface.
This method can increase the carbon content of iron liquid by more than 1.0%.
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