Issues that must be paid attention to when purchasing recarburizers for foundry!

The furnaces for casting recarburizers include electric furnaces, sky furnaces, electric arc furnaces, intermediate frequency induction furnaces, etc., which greatly increase the use of scrap, reduce the use of pig iron and eliminate the need for pig iron. The recarburizers are very helpful to the production of castings. .

Generally speaking, the recarburizer is put into the furnace such as scrap steel, a small amount of addition can be added to the surface of the molten iron, or it can be added in batches. (Note: In order to prevent excessive oxidation, the effect of carbon increase is not obvious, the casting damage is serious, etc., a large amount of molten iron is injected. The plot mentioned in the plot is to analyze the volume of the conceptual design.

When casting recarburizer, select the amount of recarburizer added according to the size of the furnace and the temperature of the furnace. For different types of cast iron, choose different types of recarburizers according to your needs. The content of recarburizers on the market is more distributed from 75-98.5. With the market's standards for product quality requirements, the recarburizer market has also changed, which is an important step in the selection of graphitized recarburizers. Therefore, the choice of recarburizer for casting is also a good science.

The carbonization furnace plays an important role in steelmaking and casting carbon replenishment. There are four types of high-quality recarburizers: petroleum coke recarburizer, graphite recarburizer, graphitized petroleum coke recarburizer and coal. Among them, the influence of coal-based recarburizers on the absorption rate is widespread. Under normal circumstances, the absorption rate is about 50%-60%. The effect of the recarburizer is that the recarburizer of graphitized petroleum coke is generally above C98.5, below S0.05, below N300PPM, and the absorption rate is above 90%. It is the recarburizer in ductile iron.

In the smelting process of iron and steel products, due to the influence of smelting time, holding time, overheating time and other factors, the smelting loss of carbon in the molten iron increases, and the carbon content in the molten iron decreases. The carbon content in the molten iron cannot reach the theoretical expectation of refining. value.

In order to make up for the carbon content burned in the steel smelting process, the added carbon content is called a carbon penetrant.

There are many materials that can be used as cast iron carburizing agents. Commonly used are mixtures made of artificial graphite, fired petroleum coke, natural graphite, coke, and anthracite.

Casting, cast iron, cast steel, and castings have requirements for carbon, and carburizing agents increase the carbon content in molten iron. For example, the commonly used furnaces in smelting include pig iron, scrap steel and furnaces. Pig iron has a high carbon content, but the purchase price is higher than that of scrap steel. Therefore, increasing the input of scrap steel, reducing the input of pig iron, and adding recarburizers can reduce the cost of castings.

Therefore, there are too many types of recarburizers, too many models, and there are many different choices in the final selection. The recarburizer for the production of suitable castings is a recarburizer. In addition to price factors, the quality of castings is also very demanding. The big factor is whether low-sulfur and low-nitrogen is better or ordinary high-sulfur is better to choose carefully.