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Effect of Carburizer Particle Size on Absorption Rate

The carburizing process using a carburant includes a dissolution diffusion process and an oxidation loss process. The particle size of the carburant is different, the dissolution diffusion rate and oxidation loss rate are also different, and the absorption rate of the carburant depends on the combined effect of the carburant dissolution diffusion rate and oxidation loss rate.

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graphite petroleum coke
petroleum coke carbon raiser

In general, the carburant particles are small, the dissolution rate is fast, and the loss rate is large; the carburant particle size is large, the dissolution rate is slow, and the loss rate is small.

For example, in a 110kg high-frequency induction furnace, the carbon raiser with a particle size of 15-18mm dissolves very quickly, and most of it is dissolved in the molten iron before it is oxidized and lost, and only a small part is lost, so the absorption rate is high.

In a 60kg induction furnace, the diameter and capacity of the hearth are relatively large, and the particle size of the recarburizer is 15-18mm, which is too small compared to the diameter and capacity of the hearth, so the loss rate is fast and the absorption rate is low; while the particle size of 116-312mm is relatively small compared to the diameter and In terms of capacity, the recarburizer has a faster dissolution rate and a slower loss rate, and the dissolution plays a dominant role, with a high absorption rate.

Therefore, the choice of the particle size of the carburizer is related to the diameter and capacity of the furnace. In general, the larger the diameter and capacity of the furnace, the larger the particle size of the carburant; otherwise, the smaller the particle size of the carburant.

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JBT produces and supplies silicon metal and ferrosilicon products, mainly products are silicon metal 553, 441, 421, 411 3303,2202, 97, silicon carbide, carbon raiser for steelmaking and casting industries. We also make electrolytic manganese metal, inoculants and nodulizers. 

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