reasons for affecting the absorption rate of recarburizer
The main role of the recarburizer is to increase carbon. It is widely used in steelmaking and casting. Increasing the absorption rate in the process of actually using the recarburizer can achieve the purpose of saving cost and improving the efficiency of the manufacturer. Therefore, the analysis influences on production. The reason for the absorption rate of the recarburizer is a very worthwhile thing to analyze!
From the point of view of kinetics and thermodynamics, the oxidation of molten iron is related to the equilibrium temperature of C-Si-O system, the O-C and Si in the molten iron will react with the iron alloy, and the equilibrium temperature will follow the target C and Si content. Differently, when the molten iron is above the equilibrium temperature, carbon oxidation occurs preferentially, and C and O generate CO and CO2, so that the carbon oxidation loss in the molten iron increases, so when the equilibrium temperature is above, the absorption rate of the recarburizer decreases. When the carbonization temperature is below the equilibrium temperature, because the temperature is lower, the saturated solubility of carbon decreases, and the dissolution and diffusion rate of carbon decreases, so the yield is also low. When the carbonization temperature is at equilibrium temperature, the recarburizer absorbs. The rate is the highest.
Stirring is beneficial to the dissolution and diffusion of carbon, avoiding the carbonation agent floating on the surface of the molten iron. Before the recarburizing agent is not completely dissolved, the stirring time is long, the absorption rate is high, and the stirring can also reduce the carbonization and holding time, so that the production The cycle is shortened to avoid the burning of alloying elements in the molten iron, but the stirring time is too long, which not only has a great influence on the selection life of the furnace, but also the stirring will aggravate the loss of carbon in the molten iron after the carbonizing agent is dissolved, so it is suitable. The stirring time of the molten iron should be suitable to ensure complete dissolution of the recarburizing agent.
When the initial carbon content in the molten iron is high, under a certain solubility limit, the absorption rate of the recarburizing agent is slow, the absorption is small, the burning loss is relatively high, and the absorption rate of the recarburizing agent is low, when the initial carbon content of the molten iron is higher. When low, the situation is reversed. In addition, silicon and sulfur in the molten iron hinder the absorption of carbon and reduce the absorption rate of the recarburizer; while the manganese element contributes to the absorption of carbon, and the absorption rate of the iterative recarburizer is updated, in terms of the degree of influence. Silicon is the largest, followed by manganese, and carbon and sulfur are less affected. Therefore, in the actual production process, manganese should be added first, then carbon should be added, and then silicon should be added.
It can be seen from the above that the reasons affecting the absorption rate of the recarburizer can be attributed to the temperature, the agitation of the molten iron, and the chemical composition of the molten iron. Therefore, in the actual use of the recarburizing agent, the three aspects can be better to increase the carbon. The absorption rate of the agent is greatly increased.
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