Carbon additive CAC
Carbon extenders for steelmaking (ferrous metallurgy industry standard of the People's Republic of China, YB/T 192-2001 for steelmaking) and cast iron, as well as other additives, such as brake pad additives, are also used as carbon extenders.Carbonizing agent belongs to additional steelmaking, ironmaking and carbonizing raw materials.High quality carbonizer is an indispensable auxiliary additive for producing high quality steel.
There are many kinds of raw materials for carbonizing agent, and the production process is also different, including wood carbon, coal carbon, coke, graphite and so on, among which there are many small categories under various categories.High quality carburizer generally refers to the carburizer after graphitization. At high temperature, the arrangement of carbon atoms shows the microscopic form of graphite, so it is called graphitization.Graphitization can reduce the content of impurity, increase the content of carbon and decrease the content of sulfur.
The use of carbonizing agent in casting can greatly increase the amount of scrap, reduce the amount of pig iron or no pig iron.In the feeding way of electric furnace smelting, the carbon increasing agent should be put into the furnace together with scrap steel and other charges.However, it is necessary to avoid large quantities of materials being poured into the molten iron to prevent excessive oxidation and the situation that the effect of increasing carbon is not obvious and the carbon content of the casting is not enough.The amount of carbonizing agent is determined according to the ratio and carbon content of other raw materials.Different types of cast iron, according to the need to choose different types of carbon additives.The choice of pure carbon-based graphitization materials can reduce the excessive impurities in pig iron, and the choice of appropriate carbon-based materials can reduce the production cost of casting.
Used for casting, cast iron, cast steel, cast will have a requirement for carbon, carburant 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, increase carbon agent, can reduce the casting cost play a role,In the process of smelting, due to improper dosing or charging and excessive decarbonization, sometimes the carbon content in the steel does not meet the requirements of the peak period, and at this time, carbon should be added to the molten steel.The commonly used carbonizing agents include carbonizing pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder.When smelting medium and high carbon steels in converter, petroleum coke with few impurities is used as carburizer.The requirement of carbonizing agent for top blow converter steelmaking is high fixed carbon, low ash, volatile, sulfur, phosphorus, nitrogen and other impurities, dry, clean and moderate particle size.