| 其他摘要 | Sponge titanium is the most important material of titanium industry. The output of sponge titanium increases quickly in China, and it is up to 20000t in 2007. The production of sponge titanium would bring lots of waste (solid, gas, liquid), which not only begets environmental pollution, but also makes useful resources wasteful. Although our country has given consideration about the controlling pollution in the production of sponge titanium, primary problems have not solved yet. In this paper, the chemical component and phase of the waste, which comes from removing vanadium by copper wire in the production of sponge titanium, have been analyzed, and the origin and utilization technique of the waste have also been studied.
Removing vanadium from rough TiCl4 is a very important process in the sponge titanium’s production, and the ball of copper wire is widely used in this process in China. The waste in this process contains copper and vanadium. In this thesis, the chemical component and phase of the waste have been researched firstly, and experimental results indicate that its main compositions are copper and vanadium. Then, a new technology has been designed to recycle the copper and vanadium : the waste is treated with NaOH, and then it would come into being sediment of copper and titanium and solution which contains vanadium; the sediment of copper and titanium is treated with H2SO4, and then it would come into being sediment of titanium and solution of CuSO4, the solution of CuSO4 is electrolyzed to get copper; the solution which contains vanadium is treated with HCl, and then it would come into being sediment of vanadium, the sediment of vanadium is baked to get V2O5. In this research, the environmental mineralogy theory and some instruments, such as chemistry, X-ray diffraction, and scanning electron microscope have been used to analyze chemical composition, phase, and microcosmic appearance of the waste and some products.
The results and conclusions of the thesis have been listed as follows:
1.Removing vanadium by copper wire which is the important process in the production of sponge titanium would bring waste, whose main part is the liquid in water washing pond, which almost occupies more than 90%；The main compositions of the liquid in water washing pond are copper (5.4g/L) and vanadium (3.6g/L). Crystals of the sediment in water washing pond are mostly (Cu0.95V2O5)CuO and Ni2V2O7.
2.Depending on chemistry and X-ray diffraction analysis of the waste, a new technology is designed to recycle copper and vanadium from the waste. More than 97% copper and 78% vanadium can be recycled by the technology.
3.The chemical composition, phase, and microcosmic appearance of the products in recycle process have been analyzed. It is convinced that copper, vanadium, and titanium are well recycled by this technology. |
修改评论