Methods of melting titanium
Of magnesium thermal method
Chlorination TiO2, TiCl4, and obtaining the restoration of his magnesium. TiCl4 before restoring cleaned thoroughly by repeated fractional distillation with simultaneous chemical treatment. Recovery ТiCl4 is produced in special reactors in argon atmosphere at a temperature of 700−950°C. Titanium sponge is then cleaned from impurities of magnesium by vacuum distillation or by leaching. The second method is cheaper, but leads to saturation of titanium sponge with hydrogen. Hydrogen is removed during the subsequent melting of the sponge in a vacuum.
With the help of electric current or ТiСl4 TiO2, (dissolved in molten salts of chlorides and fluorides of alkali and alkaline earth metals decompose at 700−800° in an atmosphere of inert gases.
ТіН2 decomposes into Ti and H2 by heating in a high vacuum. The formed Cao is washed with diluted acids. The first three methods are used for the production of technical titanium.
Percentage composition of technical titanium
Based on the thermal dissociation of titanium iodide TiJ4, which is pre-obtained by the reaction of titanium metal with low purity vapors of iodine. Ideny Titan contains up to 0.05% of impurities, mostly metal, has a tensile strength of 215 — 255 MPa; yield strength 2120 — 170 MPa; elongation 50 — 60%; necking ] 70 — 80%.
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