Development of a new precess for titanium production

1钛氧化物的铝热还原研究了钛氧化物的等离子弧熔炼铝热还原。（1）在水冷铜坩埚中，钛氧化物的铝热还原在60秒内基本完成。（2）当铝钛摩尔比从1增加到2.8时，氧含量从2.56wt%下降到0.17。当摩尔比为1.9时，得到Al= 35wt%，O=1.1wt%的钛合金。合金中的氧含量低于氧化铝坩埚法。（3）采用水平加料器和铸锭装置进行了连续还原实验。2.电子束重熔技术对钛液的脱氧（1）钛铝合金在几分钟内从4700ppm脱氧到100ppm左右。（2）合金中的氧含量在6分钟后由95ppm降至几ppm。（3）合金中的氧含量在2分钟后从50ppm降至几ppm。（4）通过向钛合金熔体中加入过量的铝，形成低价铝氧化物Al_2O，以去除钛合金熔体中的氧。

1 Aluminothermic reduction of titanium oxideAluminothermic reduction of titanium oxide was studied by plasma arc melting.(1)Aluminothermic reduction of titanium oxide was almost completed within 60 seconds in water cooled copper crucible.(2)When the molar ratio of aluminum to titanium oxide was increased from 1 to 2.8, oxygen content decreased to 0.17 from 2.56wt%. Titanium alloy(Al=35wt%, O=1.1wt%) was obtained when the molar ratio was 1.9. Oxygen content in alloy was lower than that obtained by alumina crucible.(3)The experiment for continuous reducton is in progress by horizontal feeder and ingot casting apparatus.2.Deoxidation of molten titanium by electron-beam remelting techniqe(1)Titanium aluminum alloy was deoxidized to about 100ppm from 4700ppm in a few minutes.(2)Oxygen content in alloy decreased to a few ppm from 95ppm after 6 minutes.(3)Oxygen content in alloy decreased to a few ppm from 50ppm after 2 minutes.(4)Oxygen in molten titanium alloy was removed by adding excess aluminum to the melt forming aluminum suboxide as Al_2O.