At present, ferrous metallurgy is mostly aimed to
increase products quality without rapid expansion of facilities but not to grow
material output as the situation has been for several years. It requires to
produce structural material consuming less metal, but having higher mechanical
properties due to adding alloying elements to the melt. Sometimes such elements
can be added in pure form, but as a rule, in the form of ferroalloys, i.e. iron
alloys with alloying elements. Ferrotitanium is one of the most widespread and
effective ferroalloys.
Ferrotitanium is the alloying addition consisting of
iron and titanium with the minimum titanium weight content of 20 % and the
maximum weight content of 75 % manufactured by reduction or melting. Manufacture
of titanium alloy ingots and mill products also results in generation of metal
scrap. Some scrap is graded substandard as it cannot be recycled to charge
materials for melting titanium alloy ingots due to oxidation degree, pinches and
forge laps. In order to use substandard titanium scrap, the manufacturing
process for high-grade ferrotitanium has been developed and mastered. It is
based on melting ingots of low-melting eutectic (1085˚) in the titanium-iron
system with 65-75 % of titanium. |