论文部分内容阅读
本文探讨了废钛熔盐电解精炼制取粉末冶金使用的合格钛粉的可能性及最佳工艺条件。研究结果表明,电解精炼方法制粉的难点在于钛粉含氧量随粒度减小而增高,致使大量细粉含氧量出格。细粉的含氧量与夹盐率及夹盐中可溶钛浓度有关。当可溶钛浓度约3％、夹盐率不超过60％时,-28目～+80目钛粉在粒度和含氧量方面都能满足粉末冶金的要求。通过正交实验找出了在该粒度范围内影响钛粉收得率的因素依次为熔盐种类、阴极电流密度、阳极电流密度和可溶钛浓度。文中对上述诸因素分别进行了讨论并确定了相应的最佳工艺条件。据此,在80A电解槽的扩大实验中,获得-28目～+80目粒度范围钛粉的收得率达到74％,质量超过一级海绵钛的水平。该研究结果提供了工业制取廉价合格钛粉的途径。
In this paper, the possibility of obtaining qualified titanium powder used in powder metallurgy by electrolysis of waste titanium molten salt and the optimum technological conditions are discussed. The results show that the difficulty of electrolytic refining powder is that the oxygen content of titanium powder decreases with the increase of particle size, resulting in a large number of fine oxygen content. The oxygen content of the powder is related to the salt content and the soluble titanium concentration in the salt solution. When soluble titanium concentration of about 3%, salt content does not exceed 60%, -28 mesh to +80 mesh titanium powder in the particle size and oxygen content can meet the requirements of powder metallurgy. Orthogonal experiments were used to find out the factors influencing the yield of titanium powder in the order of the type of molten salt, the cathode current density, the anode current density and the soluble titanium concentration. In this paper, the above factors were discussed separately and the corresponding optimum process conditions were determined. Accordingly, in the 80A electrolytic cell expansion experiment, the yield of titanium powder obtained in the range of -28 mesh to +80 mesh reached 74%, and the mass exceeded the level of titanium sponge in the first grade. The results of this study provide a way for industrial production of inexpensive titanium powder.