Riser thermal insulation agent for steel castings and preparation method thereof

Abstract

The invention discloses a warming heat preservation agent for a feed head of a steel casting and a production method thereof, and belongs to the field of casting auxiliary materials. According to the warming heat preservation agent, the problems that existing warming heat preservation agents are poor in heat preservation effect, easily pollute molten steel and cause recarburization can be solved. The warming heat preservation agent for the feed head is composed of aluminum powder, magnesium powder, expanded perlite, vermiculite, iron oxide powder, fluorite powder and quartz powder. The production method includes the steps of 1, weighing; 2, manufacturing blanks; and 3, drying the blanks and crushing the blanks into particles. The warming heat preservation agent for the feed head is suitable for casting production of the steel casting.

Description

technical field [0001] The invention belongs to the field of casting auxiliary materials, and in particular relates to a riser heating and heat insulating agent for steel castings and a preparation method thereof. Background technique [0002] In the production process of steel castings, due to the wide range of solidification temperature, casting defects such as shrinkage porosity and shrinkage cavities are prone to occur. For large steel castings, due to the complex casting process and the large amount of molten steel required, it is more difficult to control. Therefore, the heat preservation of the riser is particularly important for the production of large steel castings. The general practice is to cover the riser with heat insulating agent to ensure that the molten steel in the riser is finally solidified. At present, plant ash and carbonized rice husk are still partially used as heating and insulating agents for risers of steel castings. However, they are easy to absor...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a riser heating and heat preservation agent for steel castings and its preparation method, which solves the problems of unsatisfactory heat preservation effect, easy pollution of molten steel, and carbon increase in existing riser heat preservation agents.