What chemicals should be put in the instant melting of aluminum when it burns?

Er, aluminothermic reaction: Fe2O3+2Al==Al2O3+2Fe. Usually, KClO3 is added as a catalyst. Light it with a lighted magnesium rod. This used to be the place where the rails were repaired on the railway, but it is not clear now. In addition, the melting point of aluminum is very low, which can be melted instantly with an alcohol blowtorch or even an alcohol lamp with a lampshade. ......