The invention patent of Pre-treating agent we just achieved is based on Zr, Al, Ca, Ba, Y as the main elements of the Fe-Si alloy, these elements and liquid iron sulfur, oxygen, nitrogen and other stable compounds, the density of these compounds and liquid iron density is close, easy to disperse in the liquid iron, is very suitable for graphite heterogeneous nucleation particle.And in the process of molten iron smelting, even at a higher melting temperature, decomposition will not occur, which ensures the graphite nucleation particle has a strong stability.
The benefits of the invention are as follows: remarkable pre-treatment effect, Strong anti-decay ability, and stability and consistency of the performance of molten iron are guaranteed; The agent can be applied in gray cast iron, ductile cast iron, vermicular cast iron casting production process; which can effectively purify molten iron, de-oxidation, de-sulfurization, denitrification effect; Reduce the super cooling degree of molten iron, improve the metallurgical conditions of molten iron, and increase the amount of graphite in cast iron;Reduce the casting white mouth tendency, Thus to get good casting section uniformity; Improvement of the mechanical properties and outstanding stability. of the Cast iron products.