Rails thermite welding - Eruptions, melt squeezing and grinding [4K]

Rails welding by aluminothermic process on the Serbian Railways. The video shows three weldings and the complete process of welding work.
The most interesting sequences are eruptions of burning thermit, squeezing of glowing, liquid metal and finishing rail grinding.
The complete process includes:
Leveling of rails to be welded;
Preparing the mold;
Sticking mold cavities;
Preparing fireplaces (fire and eruption caldron);
Thermite eruptions;
Liquid ironing;
Squeezing melted iron and molds;
Breaking surplus materials of iron and molds;
Rails grinding and
Finishing work process, preparing rails and tracks for test drive...
Recording locations:
Railway station Rakovica;
Kosutnjak, Belgrade
Date of capturing: September 2017.