Wan H.-L.,National Engineering Laboratory for Vacuum Metallurgy |
Wan H.-L.,Laboratory Breeding Base of Complex Nonferrous Metal Resources Clear Utilization in Yunnan Province |
Wan H.-L.,Kunming University of Science and Technology |
Xu B.-Q.,National Engineering Laboratory for Vacuum Metallurgy |
And 11 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2012
Preparation of Ti powders by calciothermic reduction of titania and calcium chloride(AR) in vacuum furnace was investigated by XRD, SEM/EDS. The result indicates that calcium chloride was added which could effectively reduced the sintering effect and help to increase the gas-solid reduction reaction interface. The mass ratio of CaCl 2 and TiO 2 was about 1:4, and pieces were reduced by calcium vapor at 1273 K for 6 h. after leaching with hydrochloric acid, the Ti powders with low impurities was prepared. The Ti powders were irregular shape (10-20 μm particle size) and the surface of powder was homogeneous and loose agglomeration.
Yang X.,National Engineering Laboratory for Vacuum Metallurgy |
Yang X.,Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province |
Yang X.,Kunming University of Science and Technology |
Yang B.,National Engineering Laboratory for Vacuum Metallurgy |
And 14 more authors.
Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | Year: 2013
A novel technique was developed to remove As and Sb contents from Cu-As-Sb multi-component alloy by sulfuration and distillation in vacuum. The effects of addition of sulfur, distillation temperature and time, and pressure, on the removal of As and Sb were analytically and experimentally studied. The results show that the newly-developed sufuration is feasible to considerably improve the vacuum distillation of Cu-As-Sb multi-component alloy, and that the As, Sb contents in the residue were reduced to 0.039%, 1.02%, with an increased removal rates up to 99.84%, 95.17%, respectively, under the optimized conditions: at a S excess rate of 200%, a pressure of 5~15 Pa, and in a distillation at 1473 K for 30 min. 98% of theresidue were found to be Cu2S, with direct Cu recovery rate up to 97.60%. Besides, the residue can be easily converted into the anode copper suitable for electrolytic refining.