Thermodynamic Study on Vanadium Precipitation with Calcium Salt AITranslate
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According to the principle of simultaneous equilibrium and the law of mass conservation, thermodynamic equilibrium diagrams of Ca-V（V ）-H2O system were established with different concentrations of total free calcium at 25 ℃, and then thermodynamic analysis was made of the system. The results show that the six stable solid regions of V2O5 ,Ca（VO3）2, Ca2V207 ,Ca3 （VO4）2 ,CaB （VO4）2 ＋Ca（OH）2 and Ca（OH）2 appear in turn with increase of the system pH value. When total free calcium concentration is 0.01 mol/L in the equilibrium system,at the pH region of 5.1-9.8,vanadium is precipitated in the form of Ca（VO3）2 and vanadium concentration can be reduced to 2.2× 10^-3 mol/L. At pH region of 9.8-10.3, Ca2 V2 O7 is formed and corresponding vanadium concentration can be decreased to 1.2 × 10 ^-2 mol/L. At the pH region of 10.3-12.6 ,Ca3 （VO4）2 is precipitated and the minimum vanadium concentration can reach to 2.4 × 10^-4 mol/L, which is the best vanadium precipitation effect. When total free calcium concentration is 0.01-1.0 mol/L,theoretical optimum pH value for vanadium precipitation is kept at about 11.0-12.6.
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Basic Information:
DOI：
Chinese Library Classification Number:TF841.3[冶金工程—有色金属冶金]
Citation Information:
According to the principle of simultaneous equilibrium and the law of mass conservation, thermodynamic equilibrium diagrams of Ca-V（V ）-H2O system were established with different concentrations of total free calcium at 25 ℃, and then thermodynamic analysis was made of the system. The results show that the six stable solid regions of V2O5 ,Ca（VO3）2, Ca2V207 ,Ca3 （VO4）2 ,CaB （VO4）2 ＋Ca（OH）2 and Ca（OH）2 appear in turn with increase of the system pH value. When total free calcium concentration is 0.01 mol/L in the equilibrium system,at the pH region of 5.1-9.8,vanadium is precipitated in the form of Ca（VO3）2 and vanadium concentration can be reduced to 2.2× 10^-3 mol/L. At pH region of 9.8-10.3, Ca2 V2 O7 is formed and corresponding vanadium concentration can be decreased to 1.2 × 10 ^-2 mol/L. At the pH region of 10.3-12.6 ,Ca3 （VO4）2 is precipitated and the minimum vanadium concentration can reach to 2.4 × 10^-4 mol/L, which is the best vanadium precipitation effect. When total free calcium concentration is 0.01-1.0 mol/L,theoretical optimum pH value for vanadium precipitation is kept at about 11.0-12.6.
quote
| GB/T 7714-2015 | [1] LI He, LIU Xu-heng, HE Li-hua. Thermodynamic Study on Vanadium Precipitation with Calcium Salt[J]. Rare Metals and Cemented Carbides, 2014(1): 15-19. |
| MLA | [1] LI He, et al., "Thermodynamic Study on Vanadium Precipitation with Calcium Salt." Rare Metals and Cemented Carbides, no. 1, 2014, pp. 15-19. |
| APA | [1] LI He, LIU Xu-heng, & HE Li-hua. (2014). Thermodynamic Study on Vanadium Precipitation with Calcium Salt. Rare Metals and Cemented Carbides(1), 15-19. |
| IEEE | [1] LI He, LIU Xu-heng, and HE Li-hua, "Thermodynamic Study on Vanadium Precipitation with Calcium Salt," Rare Metals and Cemented Carbides, no. 1, pp. 15-19, 2014. keywords: {vanadium precipitation with calcium salt;Ca-V（ V ）-H2O system;thermodynamic equilibrium diagram;stable solid region} |