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Rail thermite welding material also known as exothermic welding or aluminothermic welding, is a process that uses the intense heat generated from a chemical reaction to weld railroad tracks together. The material used in this process is a thermite composition, which typically includes:

Aluminum Powder: This is the fuel for the reaction. Aluminum is a highly reactive metal that, when finely powdered, reacts exothermically with metal oxides.

Chuma(III) Oxide (Fe2O3): This serves as the oxidizer in the reaction. When combined with aluminum powder, it reacts to produce molten iron and aluminum oxide, along with a great deal of heat.

The basic chemical reaction in thermite welding is as follows:
[ Fe_2O_3 + 2 Al \rightarrow 2 Fe + Al_2O_3 + Heat ]
This reaction is known as a reduction-oxidation reaction (redox reaction) where aluminum reduces the iron oxide to iron, and in doing so, gets oxidized to aluminum oxide. The reaction is highly exothermic, meaning it releases a significant amount of heat, enough to melt the iron.
In the context of rail welding, the molten iron produced by the thermite reaction is what fuses the rail ends together. The process involves the following steps:

Preparation: The ends of the rails to be joined are cleaned and aligned. A mold, known as a crucible, is placed around the joint to contain the molten iron.

Ignition: The thermite mixture is placed in the crucible and ignited, usually with a flammable primer or a sparkler-like igniter.

Reaction: The thermite mixture reacts, producing molten iron which flows into the gap between the rail ends.

Solidification: The molten iron solidifies to form a solid weld, fusing the rail ends together.

Finishing: After cooling, excess material is removed, and the weld is ground down to ensure a smooth, continuous rail surface.

Thermite welding is often preferred for rail applications because it produces a high-quality weld that is strong and durable, capable of withstanding the heavy loads and stresses associated with rail traffic. It also has the advantage of being portable and relatively easy to perform in the field, which is essential for repairing and maintaining railway tracks.

We can make mould to weld below steel rails:

MATUMIZI YA RELI	AINA YA RELI	KIWANGO CHA
Reli kwa Reli	43 reli ya kg /m, 50 reli ya kg /m, 60 reli ya kg /m, 75reli ya kg /m, 60N reli, 75N reli	TB/T2344-2012, TB/T3276-2011
	Reli ya P50/Reli ya R50, Reli ya P65/Reli ya R65, RP60E1	GOST-R51685, GOST R51054-2014
	Reli ya S49, Reli ya UIC54, Reli ya UIC60	UIC860
	Reli ya JIS50N, Reli ya JIS60	JIS E1101
	Reli ya AS50, Reli ya AS60, Reli ya AS68	AS1085, BHP RT STD
	90Reli ya RA, 100Reli ya RE, 115Reli ya RE, 132Reli ya RE, 136Reli ya RE	AREMA
	Reli ya TR45, Reli ya TR50, Reli ya TR57, Reli ya TR68	ASTM A759
	Reli ya BS75A, Reli ya BS90A, Reli ya BS100A	KIWANGO CHA BS11
	ISCOR 48 Reli, ISCOR 57 Reli	Kiwango cha uzalishaji wa UIC860
	45E1, 49Reli ya E1, 50Reli ya E2, 54Reli ya E1, 60Reli ya E1, 60Reli ya E2	EN 13674-1, EN13674-4
Badilisha Reli	50Reli ya AT1, 60Reli ya AT1, 60Reli ya AT2, 60Reli ya TY1	TB/T3109-2013
Reli ya Crane	A45, A55, A65, A75, A100, A120, A150	DIN536
	Reli ya QU70/Reli ya KP70, Reli ya QU80/Reli ya KP80, Reli ya QU100/Reli ya KP100, Reli ya QU120/Reli ya KP100, Reli ya CR175	YB / T5055-2014/GOST53866-2010 ASTM A759-2000
Reli ya Grooved	59Reli ya R2, 60Reli ya R2	EN 14811:2006
Vifaa vya ujenzi wa reli	Mashine ya kulehemu ya reli ya Movable, Mashine ya kulehemu ya reli flash

Ikiwa unahitaji, Tafadhali jisikie huru kuwasiliana nasi.