the influence of recarburizer on smelting

With the same chemical composition, using different smelting processes,ingredients and ingredient ratios, the metallurgical quality of molten iron is completely different. In order to obtain a good carburizing effect, the cupola uses high-temperature smelting technology,during the cupola smelting, the amount of pig iron charge is minimized, and a recarburizer is used to ensure high carbon equivalent and relatively increase the amount of scrap steel. In this way, under the conditions of high-temperature smelting, carbon with good activity and more significant graphitization can be obtained by carburizing. It reflects the better shape of graphite on castings, which is beneficial to improve mechanical properties, reduce shrinkage tendency, and improve processing performance. During electric furnace smelting, high-quality molten iron can be obtained by carburizing with low pig iron consumption or even zero consumption. In terms of material properties, the large proportion of pig iron used in the past is half a grade lower than the high scrap steel with the same composition. Therefore, the new smelting process with recarburizer is superior to the traditional large proportion of pig iron in terms of cost and finished product performance.

The influence of recarburizer on smelting mainly has three aspects.

1. Liquid iron recarburization technology, especially in electric furnace smelting, can increase graphite nuclei. The addition of silicon carbide to the cupola smelting can also increase the long-lasting graphite nucleus of the molten iron and reduce the oxidation of the molten iron.

2. Carbon increase is the best measure to prevent or reduce shrinkage tendency. Due to the effect of graphitization expansion during the solidification of molten iron, good graphitization will reduce the shrinkage tendency of molten iron.

3. Under the condition of high carbon content, in order to obtain high-strength gray cast iron castings, the smelting process adopts the process of adding all scrap steel and recarburizer to make the molten iron more pure and produce high-performance casting materials.

Anyang Huatuo Metallurgy has in the recarburizer for steelmaking and casting for more than 10 years, know well about the production and performance of recarburizer,so if any confused just consult.