Study on analytical method of V, Cr and Si in the process of extracting V from vanadium slag by sub-molten salt

Zhang Wei; Wang Baohua; Liu Chao; Liu Liying; Lv Hui; Zhu Jianyan

doi:10.7513/j.issn.1004-7638.2021.05.015

Volume 42 Issue 5

Oct. 2021

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Zhang Wei, Wang Baohua, Liu Chao, Liu Liying, Lv Hui, Zhu Jianyan. Study on analytical method of V, Cr and Si in the process of extracting V from vanadium slag by sub-molten salt[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 92-98. doi: 10.7513/j.issn.1004-7638.2021.05.015

Citation:

Zhang Wei, Wang Baohua, Liu Chao, Liu Liying, Lv Hui, Zhu Jianyan. Study on analytical method of V, Cr and Si in the process of extracting V from vanadium slag by sub-molten salt[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 92-98. doi: 10.7513/j.issn.1004-7638.2021.05.015

Citation:

Zhang Wei, Wang Baohua, Liu Chao, Liu Liying, Lv Hui, Zhu Jianyan. Study on analytical method of V, Cr and Si in the process of extracting V from vanadium slag by sub-molten salt[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 92-98. doi: 10.7513/j.issn.1004-7638.2021.05.015

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Study on analytical method of V, Cr and Si in the process of extracting V from vanadium slag by sub-molten salt

doi: 10.7513/j.issn.1004-7638.2021.05.015

Zhang Wei^{1, 2
,},
Wang Baohua^{1, 2},
Liu Chao^{1, 2},
Liu Liying^{1, 2},
Lv Hui^{1, 2},
Zhu Jianyan^{1, 2}

1.
Chengde Vanadium and Titanium New Material Co., Ltd., HBIS Group Co., Ltd., Chengde 067102, Hebei, China
2.
HBIS Group Chengsteel Company, Chengde 067102, Hebei, China

Received Date: 2021-07-26
Publish Date: 2021-10-30

Abstract

Abstract

The analysis method of vanadium, chromium and silicon in the process of vanadium extraction from vanadium slag by sub-molten salt was studied. The content of vanadium and chromium was determined by ammonium persulfate oxidation and ammonium ferrous sulfate titration. At 15%～20% sulfuric acid acidity, ammonium persulfate oxidizes vanadium to a pentavalent state, while Cr(VI) is reduced to Cr(III) to eliminate chromium interference and determine the amount of vanadium. In 4%～6% sulfuric acid acidity, add silver salt and ammonium persulfate at the same time for oxidization of vanadium and chromium, in order to determine the amount of vanadium and chromium, and the amount of chromium is calculated by difference subtractive method. The concentration of silicon in the crystallization solution was determined by silicon molybdenum blue photometric method. Add sodium sulfite to reduce vanadium and chromium and eliminate the interference of vanadium and chromium. With phenolphthalein as indicator, sulfuric acid was added to adjust the acidity of silicon molybdenum yellow to 0.3 mol/L. The absorbance of the color solution was determined at the wavelength of 660 nm, and the working curve was drawn to calculate the silicon concentration. At the same time, the method precision and standard addition recovery tests were carried out, and the results were satisfactory.
- vanadium slag,
- vanadium extraction by sub-molten salt,
- vanadium,
- chromium,
- silicon,
- analytical method

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References(16)

References

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