Journals →  Tsvetnye Metally →  2024 →  #3 →  Back

HEAVY NON-FERROUS METALS
ArticleName Coarse-grained carbonyl nickel powders: issues of technology and equipment
DOI 10.17580/tsm.2024.03.01
ArticleAuthor Anisimov P. M., Biketova L. V., Lisakov Yu. N., Chuprynin N. P.
ArticleAuthorData

Kola MMC, Monchegorsk, Russia

P. M. Anisimov, Head of the Carbonyl Nickel Division, Nickel Electrolysis Shop

 

Gipronikel Institute LLC, Saint Petersburg, Russia
L. V. Biketova, Senior Researcher, Hydrometallurgy Laboratory, Candidate of Technical Sciences
Yu. N. Lisakov, Senior Researcher, Candidate of Technical Sciences
N. P. Chuprynin, Category Engineer, Hydrometallurgy Laboratory, e-mail: chupryninNP@nornik.ru

Abstract

In 2022, there was a sharp increase in the demand of domestic enterprises for coarse-grained nickel powders of the PNK-2K9 and PNK-2K10 grades. Increasing productivity by several times required changing the technology of their production and the equipment used. The pilot tests conducted at the Carbonyl Nickel Division of the Nickel Electrolysis Shop at JSC Kola MMC contributed to determining the optimal parameters for the formation of coarse-grained nickel powders. The «delicate» process of producing powders of a given morphology is based on a clear and precise compliance with the temperature range in the upper zone of the decomposer and the flow rate of nickel tetracarbonyl vapors supplied to the decomposer. In order to optimize the sieving of powder, an equally important stage in the production of coarse-grained powders of the PNK-2K9 and K10 grades, the authors carried out experiments on sieving the powder feedstock on screening machines of various types. The experiments showed the superiority of the impact-type vibrating screen compared to the non-impact vibrating screen. The main problem requiring additional research is the carburization of nic kel, which leads to instability of the carbon content in the finished product. The morphology of the resulting particles shows that coarse-grained powders are conglomerates of baked particles under local overheating conditions. The most efficient method to reduce the carbon content in nickel powders is high-temperature annealing in a hydrogen atmosphere, as confirmed by a series of experiments. Factoring into the degree of the carbon reduction during annealing (from 0.6 to 0.016%), further research can be carried out in the field of reducing ennobling temperature, since the target value (0.28%) can obviously be achieved at a significantly lower temperature.

keywords Carbonyl nickel powders, sieving of powders, vibrating screen, carburization of nickel, powder surface morphology
References

1. GOST 9722–2023. Nickel powder. Specifications. Introduced: 01.01.2023.
2. GOST 18318–94. Metallic powders. Determination of particle size by dry sieving. Introduced: 01.01.1997.
3. Tereshchenko S. V., Shibaeva D. N., Shumilov P. A., Vlasov B. A. Effect of vibrating feeder pan geometry on radiometric separator performance. Eurasian Mining. 2020. No. 2. pp. 39–42.
4. Romanov A. I., Kasatkin V. V. Influence of drag force on motion of finely dispersed granules in gas environment. New materials and technologies in aviation and rocket and space equipment. Korolev : Mashpribor, 2005. pp. 21–25.
5. Romanov A. I. Study on regularities of a process of classifying finely dispersed granules of heat-resistant nickel alloys by size: thesis. … of Candidate of Technical Sciences. Moscow : MATI, 2009. 141 p.
6. Koshelev V. Ya., Golubeva E. A., Durmanova G. Ya. Screening of heatresistant nickel alloy granules with vibrating screens. Metallurgy of granules. Moscow : VILS, 1993. No. 6. ss. 239–246.
7. Nazarov K. S., Fet Sh. Analysis of the Modern Design Solutions Increasing Efficiency of Screening by Vibration of Hard-to-Sieve Materials. Gornyy informatsionno-analiticheskiy byulleten. 2009. Vol. 16, No. 12. pp. 383–393.
8. Kadel R. Wirtschaftliche Klassierung von siebschwierigem Gut mit Clip-Clean. Aufbereitungstechnik. 2003. Nо. 7. pp. 11–16.
9. Kazantsev E. I. Industrial furnaces. Reference book for calculations and design. Moscow : Metallurgiya, 1975. 368 p.
10. Sudha G.T., Stalin B., Ravichandran M., Balasubramanian M. Mechanical properties, characterization and wear behavior of powder metallurgy composites – a review. Materials Today: Proceedings. 2020. Vol. 22, Part 4. pp. 2582–2596. DOI: 10.1016/j.matpr.2020.03.389
11. Kasimtsev A. V., Levinsky Yu. V., Yudin S. N. Calciothermic powders of rare metals and intermetallic compounds. Non-ferrous Metals. 2020. No. 2. pp. 31–50.
12. Hongyu Wu, Xiaoli Zhuang, Yan Nie, Yunping Li, Liang Jiang. Effect of heat treatment on mechanical property and microstructure of a powder metallurgy nickel-based superalloy. Materials Science and Engineering: A. 2019. Vol. 754. pp. 29–37. DOI: 10.1016/j.msea.2019.03.064
13. Li Chen, Zhanjiang Li, Pinqiang Dai, Peixin Fu. et al. Effects of carbon addition on microstructure and mechanical properties of Fe50Mn30Co10Cr10 high-entropy alloy prepared by powder metallurgy. Journal of Materials Research and Technology. 2022. Vol. 20. pp. 73–87. DOI: 10.1016/j.jmrt.2022.07.067

Language of full-text russian
Full content Buy
Back