What Should Be Paid Attention To When Using Recarburizer

The application of recarburizers is a very important task. While mastering the usage and dosage, we must learn to analyze and summarize. The most important element in the recarburizer is carbon. The main function of carbon is to increase carbon content, increase graphitization expansion, and reduce shrinkage. In addition, the increase in carbon equivalent can also improve the fluidity of ductile iron, which is conducive to filling and shrinking.

The high phosphorus content in the molten iron expands the solidification range. At the same time, there is no eutectic of low melting point phosphorus in the final solidification process. The slab becomes weaker and has a tendency to increase shrinkage and porosity. The phosphorus content is generally less than 0.08%. In the smelting process, by increasing the temperature of the molten iron, the recovery rate can reach about 90%. If manually stirred, it will dissolve or absorb low-temperature molten iron.

When the recarburizer is used in the refining furnace, the fixed carbon content must be greater than 90%. The lower the sulfur content, the smaller the content. When the water content is less than 0.5%, the carburizing agent component that needs to be added should be calculated in advance, and slowly added with an electric shovel, so that the bare molten steel surface is slowly added. Keep stirring for 3-5 minutes, after the carburetor is completely absorbed, reduce the stirring intensity. got a good result.

Silicon carbide used in refining furnaces is generally low-grade silicon carbide. The silicon carbide content is about 70%, and the sulfur content should not be too high. However, the particle size of silicon carbide should be appropriately adjusted according to the size of different furnace types.

The purpose of refining is deoxidation, desulfurization, desulfurization agent, inclusions, alloying, temperature adjustment, etc. The importance of the process cannot be ignored. Therefore, different production processes can be summarized according to different production situations.