Iron zirconium is a ferroalloy composed of zirconium and iron, silicon, aluminum and other elements. Iron zirconium used in steelmaking is zirconium ferrosilicate, containing Zr15% ~ 45%, Si30% ~ 65%. The one produced by thermite method is called zirconium because it contains aluminum
Aluminium iron, containing 15% Zr Bb0.
In 1789, M. H. Klaproth of Germany discovered a new oxide, named "Zircomia". In 1824, J.J. Berzelius of Sweden made zirconium for the first time by reducing K2ZrF6 with potassium. In 1923, the test of using zirconium ferrosilicon as deoxidizer was carried out for the first time in American steel mill, and good results were obtained. Then they began to produce zirconium ferrosilicate and zirconium aluminum-iron by metallic thermal process. China Nanjing Special Alloy Factory, in 1987, trial-produced zirconium ferrosilicate, containing Zr20% ~ 40%, Si45% ~ 55%; Used as deoxidizer for steelmaking.
Zirconium has an atomic weight of 91.22. The outer electronic structure is ZTDZ5S. Melting point is 1852 ℃. The boiling point of 4400 ℃. Density 6.49 g/cm3(20℃). The phase diagram of the ferrozirconium series is shown in 1 FN. Zirconium and iron form a stable compound FeZR2 (45.1% Zr) with a melting point of 1650℃. There are two eutectic in the Fe-Zr system. At 16%Zr, the eutectic melting point is 1330℃. The eutectic melting point is about 940℃ at 84%Zr. Zirconium and silicon form various kinds of zirconium silides. Zr: Si(Si13.65%), ZrSi3(Si15.55%), ZrSi(Si23.55%) and ZrSi2(Si38.12%), etc. The density of commercial zirconium ferosilicate is about 3.5g /cm3, and the melting temperature range is 1260 ~ 1345℃.
