Method for smelting ductile cast iron

Abstract

The invention discloses a method for smelting ductile cast iron, which comprises the following steps: adding returning iron, scrap iron and scrap steel into a long coil melting furnace layer by layerfor being melted into ductile cast iron base iron, and then adding a recarbonizer, wherein the ingredients are in the following proportion: 35-40 percent of scrap iron or scrap steel and 60-65 percentof returning iron. The scrap steel, the scrap iron and the recarbonizer are used for replacing past pig iron raw materials with higher price, thereby well saving the production cost, facilitating theproduction according to the produced products with different brands and different carbon contents, reducing the labor intensity, ensuring the strict carbon contents of the products, and improving thequality of the products.

Description

technical field [0001] The invention relates to a casting process, in particular to a ductile iron smelting method, which belongs to the field of casting. Background technique [0002] At present, most of the enterprises producing ductile iron in the foundry industry still use the traditional batching method of pig iron + returned iron + scrap steel, which has high production costs and is greatly restricted by the quality, supply and price of raw materials. Facing losses, suspension of production, or even bankruptcy. After the castings are processed, a large amount of iron filings cannot be recycled and digested, and they are sold as scraps at a low price, resulting in a large waste of resources and increased costs. Contents of the invention [0003] Aiming at the deficiencies of the existing technology, the technical problem to be solved by the present invention is to provide a ductile iron smelting method, which can save production costs and increase output by changing ...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the enterprises producing ductile iron in the foundry industry still use the traditional batching method of pig iron + returned iron + scrap steel, which has high production costs and is greatly restricted by the quality, supply and price of raw materials. Facing losses, suspension of production, or even bankruptcy

After the casting is processed, a large amount of iron filings cannot be recycled and digested, and they are sold as scraps at a low price, resulting in a large waste of resources and increased costs

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