The semi-graphite recarburizer has a low melting point and the material is graphite, so it is specially prepared to melt, and the effect is very good. Its fixed carbon content is generally around 98, and the sulfur content is low. Generally, the sulfur content is below 0.3 or even 0.2. The effect is very good, whether it is in cast iron or cast steel, the absorption rate is very high, so it is adopted by more and more steel mills and foundries, and the price of semi-graphitized recarburizer is also higher than that of graphite recarburizer and Petroleum coke recarburizers are much cheaper, which adds to the advantages of semi-graphite recarburizers.
Experiments have shown that the dissolution of carbon in molten iron is controlled by the mass transfer of carbon in the liquid boundary layer on the surface of the solid particles. Comparing the results obtained with coke and coal particles with the results obtained with graphite, it is found that the diffusion and dissolution rate of graphite recarburizer in molten iron is significantly faster than that of coke and coal particles. Observing the partially dissolved coke and coal particle samples with an electron microscope, it is found that a very thin viscous ash layer is formed on the surface of the sample, which is the main factor affecting its diffusion and dissolution performance in molten iron.
Therefore, from all aspects, the effect of semi-graphitized recarburizer is very good whether it is in foundries or steel plants, and it is cheap, and it is a very cost-effective recarburizer. Shengchi Ferroalloy is a professional manufacturer of recarburizers. If you need a recarburizer for foundry. Please contact us.