Open Access
Non-ferrous Metals, volume 48, issue 1, pages 3-7
Processing of fuel oil ash from thermal power plant with extraction of vanadium and nickel
Publication type: Journal Article
Publication date: 2020-06-30
Metals and Alloys
Ceramics and Composites
Abstract
The article presents results of research on extraction of vanadium and nickel from fuel oil ash. The studied ash contains a significant amount of valuable components (7.82% of V2O5 and 0.74% of NiO), which makes it a promising raw material for processing. We researched the influence of oxidizing roasting and its duration, the type of charge mixing and the amount of sodium carbonate addition on the level of extraction of vanadium and nickel through consecutive water and sulphuric acid leaching. The article also presents the chemical processes that occur during oxidizing roasting of ash with different amounts of sodium carbonate additions and their influence on the results of extraction of vanadium and nickel. We established that vanadium is generally extracted at the water leaching stage, whilst nickel is extracted only at the sulphuric acid leaching stage this allows for a selective separation of vanadium from nickel. The extraction level of nickel can reach 56.7%, yet it may decrease considerably due to the formation of insoluble nickel ferrite through maximum extraction of vanadium. In the article we offer a schematic diagram of ash processing, where ash is introduced at the wet briquetting stage with addition of 50% of soda. After drying, the obtained briquettes go through 60 minutes of oxidizing roasting at the temperature of 500 оC. We then leach the roasted product in water at the temperature of 80 oC for 60 minutes. During this process nearly 82.0% of V2O5 goes into the solution, whilst almost all of nickel remains in the solid residue. After that, we extract vanadium from the vanadate solution by sedimentation of ammonium vanadates to obtain a marketable high-purity vanadium pentoxide. Afterwards, we leach the solid residue with a 3% sulphuric acid for 60 minutes to extract nickel. The solid residue, whose mass equals 42.4% of the mass of the initial ash, contains 56.9% of Fe2O3, 2.1% of V2O5, 1.4% of NiO etc. It poses no harm to the environment and may be further processed as iron-ore or titanomagnetite raw materials at the existing enterprises with extraction of iron, vanadium and, perhaps, nickel.
Our research was carried out with the support of a program of Presidium of RAS (Filing number of Research, Development and Technological Work: АААА-А18-118032690052-5).
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Goncharov K. V. et al. Processing of fuel oil ash from thermal power plant with extraction of vanadium and nickel // Non-ferrous Metals. 2020. Vol. 48. No. 1. pp. 3-7.
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Goncharov K. V., Kashekov D. Yu., Sadykhov G. B., Olyunina T. V. Processing of fuel oil ash from thermal power plant with extraction of vanadium and nickel // Non-ferrous Metals. 2020. Vol. 48. No. 1. pp. 3-7.
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TY - JOUR
DO - 10.17580/nfm.2020.01.01
UR - https://doi.org/10.17580%2Fnfm.2020.01.01
TI - Processing of fuel oil ash from thermal power plant with extraction of vanadium and nickel
T2 - Non-ferrous Metals
AU - Goncharov, K V
AU - Kashekov, D Yu
AU - Sadykhov, G B
AU - Olyunina, T V
PY - 2020
DA - 2020/06/30 00:00:00
PB - Ore & Metals Publishing House
SP - 3-7
IS - 1
VL - 48
SN - 2072-0807
ER -
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@article{2020_Goncharov,
author = {K V Goncharov and D Yu Kashekov and G B Sadykhov and T V Olyunina},
title = {Processing of fuel oil ash from thermal power plant with extraction of vanadium and nickel},
journal = {Non-ferrous Metals},
year = {2020},
volume = {48},
publisher = {Ore & Metals Publishing House},
month = {jun},
url = {https://doi.org/10.17580%2Fnfm.2020.01.01},
number = {1},
pages = {3--7},
doi = {10.17580/nfm.2020.01.01}
}
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Goncharov, K. V., et al. “Processing of fuel oil ash from thermal power plant with extraction of vanadium and nickel.” Non-ferrous Metals, vol. 48, no. 1, Jun. 2020, pp. 3-7. https://doi.org/10.17580%2Fnfm.2020.01.01.