Production of Liquid Alloy of Titanium by Electrodeposition

在750℃下，用含TiCl_4的等摩尔NaCl-KC1熔体电沉积Ti -液态Al及其合金，尝试制备液态Al基Ti合金。消除了与结晶形貌有关的问题，也避免了由于钛在合金表面的低活性而引起的歧化反应。结果表明：1)在由铝铜合金阴极组成的堆叠双极电池中，Ti浓度达到最大值7%；2) Ti在合金中的溶解度实验表明，当Ti浓度在0.3%以上时，Al-Ni和Al-Cu合金中有Al_3Ti金属间化合物的固体颗粒沉积。它还表明，采用纯。在液态合金中以Al为阴极可获得高浓度的Ti。3)在由单元阴极-阳极系统组成的电解槽中进行的电解实验表明，机械搅拌合金能有效地使Al_3Ti颗粒在液电极底部析出。4)开发了一种螺旋式TiCl_4供料装置，使TiCl_4气体与熔体充分接触，达到高浓度TiCl_4的目的。熔体中的液态Al也与TiCl_4反应生成Al_3Ti。5)随着熔体中AlCl_3浓度的增加，生成Al_3Ti的反应速率增大。通过氩气鼓泡对铝表面的扰动，使Al_3Ti颗粒均匀地分散到铝液中。以上结果表明，从TiCl_4中电积Ti作为液态合金是Ti组分新用途的一种有吸引力的工艺。

An attempt to produce liquid Al-base alloy of Ti was carried out by electrodeposition of Ti on liquid Al and its alloy from a equimolar NaCl-KC1 melt containing TiCl_4 at 750 C. To recover Ti as a liquid alloy has great advantage comparing with its recovery as a solid state; the problems related with crystalline morphology are eliminated and the disproportionation reaction is also avoided due to the low activity of Ti on the alloy surface.The results are as follows: 1) The Ti concentration of 7 % as the maximum value is achieved in a stacked bipolar electrode cell composed of Al-Cu alloy cathodes. 2) The experiment on solubility of Ti in the alloys shows that solid particles of intermetallic compound of Al_3Ti deposit in the Al-Ni and Al-Cu alloys in the concentration range over 0.3 % Ti. It also shows that employing pure.Al as a cathode is advisable to obtain high concentration of Ti in the liquid alloy. 3) The electrolysis experiments in a cell composed of a unit cathode-anode system show that the mechanical stirring of alloy is effective to precipitate Al_3Ti particles in the bottom of the liquid electrode. 4) A spiral type supplier of TiCl_4 was developed to contact TiCl_4 gas with the melt sufficiently and it achieves high concentration of TiCl_4. Liquid Al in the melt also reacts with TiCl_4 to produce Al_3Ti. 5) The rate of reaction producing Al_3Ti increases with the concentration of AlCl_3 in the melt. The particles of Al_3Ti are dispersed homogeneously into the liquid Al by perturbation of Al surface by Ar gas bubbling.Above results show that electrowinning of Ti as a liquid alloy from TiCl_4 can be an attractive process for the new usage of Ti component.