Release agent for molten iron casting

Abstract

The invention relates to a release agent for molten iron casting. The release agent comprises the following raw materials by weight: 40-50% of quicklime, 20-30% of yellow mud powder and 20-40% of coal powder which are matched. The specification of the quicklime and the yellow mud powder is that 180-200 mesh quicklime and yellow mud powder occupy over 80% of the total, and the coal powder with granularity lower than 5mm occupies over 90% of the total. The release agent has the advantages of being high in adhesion capability on an iron cast mould and even in coating; enabling iron block demoulding rate to reach over 98%; facilitating observation in matching of the release agent and being capable of well controlling viscosity; greatly improving abrasion resistance and scraping resistance; being low in unit price due to the fact that the quicklime and the yellow mud powder are less in quantity; and saving resources and reducing production cost due to the fact that the releasing agent flushed by cooling water from the iron casting mould precipitates in a circulation gutter and a precipitation tank and can be recycled to serve as a part of raw materials to rematch the release agent after impurities are removed simply.

Description

technical field [0001] The invention belongs to the technical field of a release agent formula for iron and steel smelting molten iron casting and an application method thereof. Background technique [0002] After the molten iron is cooled and solidified into iron blocks by spraying water in the cast iron mold of the chain belt of the cast iron machine, it is separated from the cast iron mold at the head of the cast iron machine. To achieve this purpose, a layer of inert coating must be sprayed between the cast iron mold and the iron block. layer (release agent), so that the iron block can easily fall off from the cast iron mold. At present, there are two commonly used release agent mixing methods for molten iron casting in the smelting industry: one is to mix active lime and coal powder according to a certain proportion to form a release agent; the second is to mix active lime, graphite-like, and waste magnesium materials according to a certain ratio The same type of mold...

AI Technical Summary

Problems solved by technology

The mold release agent blended by the above method can solve the problem of demoulding most iron blocks to a certain extent, but there are still the following problems: (1) The mold release agent solution prepared by adding active lime, coal powder, (2) The anti-abrasion and anti-scratch properties of the release agent are weak

(3) For some iron blocks with special components, the release agent prepared by the first method obviously cannot meet the production needs

The release agent prepared by adding water to the second active lime, graphite-like, and waste magnesium materials not only consumes a lot of resources, but also increases production costs