The way of adding petroleum coke recarburizer is an element that many people ignore, but they don't know that the appropriate way of adding can improve the actual effect of carbon increase quietly. Medium temperature asphalt
When charging, the recarburizer is stirred with the charge and placed in the bottom and middle of the induction furnace, so that the recarburization efficiency is higher. When joining, it is usually added together with other furnace materials. Starting from the second furnace, the remaining molten iron 200-400KG will be invested in plastic bags to fill the recarburizer funds into the molten iron level. What is the amount of recarburizer? Generally, it is stipulated that 3-4KG of recarburizer is added for every 100 kilograms of waste steel added. This proportion is suitable for adding recarburizer. When smelting steel castings in a coreless induction electric furnace, the target composition of cast iron, the preparation of various charge materials and other various processing process elements all affect the recarburization efficiency of the recarburizer.
Petroleum coke recarburizer
Graphitized recarburizers are mainly made of graphitized petroleum coke and graphite electrodes. The composition is usually greater than 98 carbon content to 99.5%; sulfur content is between 0.05 and 0.03. It can be mainly used for ductile iron. It is characterized by fast absorption, high carbon and low sulfur.
Natural graphite recarburizers, mainly natural graphite, with a carbon range of 65-99, are mainly used in steel mills, but not found in foundries.
Composite recarburizers. Recently, there are some stick-shaped particles made by artificial intelligence of enterprises or social rules and spherical nano-particle recarburizers on the market, using graphite powder, coke powder, petroleum coke and other footing materials, adding different bonding The machine can be compressed into a shape. The carbon is generally between 93-97, and the sulfur is unstable. Generally, it floats between 0.09-0.7. The characteristic is that the price is cheap, but the disadvantage is that it cannot stabilize the addition amount and control the sulfur content during use.
For steel mills, in order to increase the carbon content in steel, recarburization treatment is required when smelting steel, that is, adding an appropriate amount of suitable recarburizing agent. Moreover, with the development of the industry, there are different types of recarburizers, and users can choose suitable recarburizers according to the production of different steels. But it is precisely because there are many types of recarburizers, so when choosing, it is often impossible to start. The reason for this situation is mainly due to insufficient understanding of recarburizers. Therefore, the recarburizer manufacturers will briefly talk about the types and differences of recarburizers.
Under normal circumstances, recarburizers can be divided into recarburizers for steelmaking, recarburizers for cast iron, and recarburizers for other materials. According to the different raw materials, recarburizers can be divided into metallurgical coke recarburizers, calcined coal recarburizers, petroleum coke recarburizers, graphitized recarburizers, natural graphite recarburizers, and composite material recarburizers. Among them, there is a clear difference between graphite recarburizer and coal recarburizer.