Short process casting modifier

Abstract

The invention discloses a short process casting alterant. The alterant comprises the following components Cr, Mn, and Mo; wherein the casting molten iron in a furnace comprises the components mentioned above in percentage by weight: 0.2% to 0.5% of Cr, 0.8% to 1.0% of Mn, and 0.1% to 0.4% of Mo. Blast furnace molten iron is directly transported into an intermediate frequency furnace to carry out modulation; elements, which can impede the graphitization, such as Cr, Mn, and Mo, are added into the intermediate frequency furnace in order to increase the binding force between the Fe atoms and the C atoms and impede the growth of bulky and straight graphite; a front-furnace primary inoculation treatment is strictly controlled, a secondary inoculation technology is adopted, wherein in the secondary inoculation technology a high-efficient inoculant flows with the casting molten iron; thus the heredity problem of blast furnace molten iron is well solved, furthermore, the waste of electricity, coke, and moulding materials such as limestone is avoided; and the problems of a large amount of discharged solid waste and gas waste, heavy pollution, large energy consumption, and low economic efficiency during the melting process are solved at the same time.

Description

technical field [0001] The invention relates to a modifier, in particular to a modifier specially used for short-flow casting of gray cast iron brake discs. Background technique [0002] When molten iron in a blast furnace is solidified into pig iron ingots, graphite will aggregate into coarse graphite. When the pig iron ingot is remelted, the compounds formed by these coarse graphites can be used as new crystallization cores. However, in short-process smelting, the carbides precipitated from blast furnace molten iron are far smaller than those precipitated from pig iron ingot melting, with fewer crystallization cores and large heredity of molten iron. Therefore, it is necessary to add a modifier to reduce the genetics of blast furnace molten iron. Sex, the effect of improving the quality of molten iron. However, the modificator in the prior art has many types of component content, which is inconvenient to prepare, and is likely to have unpredictable effects on casting prod...

AI Technical Summary

Problems solved by technology

However, the modificator in the prior art has many types of components, which is inconvenient to prepare, and it is easy to have unpredictable effects on the casting product due to the ratio error, so it is very inconvenient to use