Casting process of cast iron profile

Abstract

The invention discloses a casting process of a cast iron profile. According to the casting process, 0.33%-1.22% of Mn is added into molten iron, the hardness of cast iron can be improved, Mn is proneto being oxidized in air, a brown oxide covering layer is generated, and oxidation covering can be conducted on the surface of the cast iron profile; meanwhile, the Ti content accounts for 0.18%-0.33%, reliable stability of titanium can be kept in the Ti content, in the conveying process of the cast iron profile, a cooling water temperature pressure flow controller controls the temperature of thecast iron to be reduced to 180-250 DEG C, external cooling and internal heating are achieved, a drawing machine is pulled by a certain distance and stopped for a certain time, a shell is formed in thedirection from the front edge of cast iron crystallization to the interior of a furnace, the center of the cast iron crystallization is kept in a liquid state, the four stages of the drawing machineare the drawing starting stage, the drawing speed stabilizing stage, the drawing stopping stage and the drawing stopping static stage correspondingly, the yield of cast iron profiles is greatly increased through drawing of the four stages, and the problems that in the molten iron cooling drawing process, due to the insufficient process, the cast iron is prone to breakage and serious deformation are solved.

Description

technical field [0001] The invention relates to the technical field of cast iron, in particular to a casting process of cast iron profiles. Background technique [0002] In iron and steel enterprises, after the molten iron comes out of the blast furnace, it must be transported to the steelmaking workshop or iron casting workshop by special containers, and the casting iron workshop uses casting equipment to cast iron blocks. When the iron casting equipment is working, the molten iron is shipped by a special container and transported along the railway to the side of the flow iron trough of the cast iron machine, and then poured into the flow iron trough from the special container. Most of the original blast furnaces of iron and steel enterprises use molten iron tanks as special containers for shipping molten iron; however, in the newly built or rebuilt blast furnace projects in recent years, most of them use mixed iron cars with large volume and good thermal insulation perform...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a casting process of cast iron profiles, which solves the problem that cast iron fractures and serious deformations are often caused due to insufficient process during the cooling and drawing of molten iron

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