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Foundry production
Название Life cycle impact on the quality of foundry coke. “Supply to the consumer” stage
Автор V. A. Ivanova, E. O. Pobegalova
Информация об авторе

Yaroslavl State Technical University (Yaroslavl, Russia):

V. A. Ivanova, Dr. Eng., Associate Prof., Head of the Dept. “Technology of materials, standardization and metrology”, E-mail: ivanova-waleriya@mail.ru
E. O. Pobegalova, Senior Lecturer, E-mail: pobegalovaeo@gmail.com


The quality characteristics of foundry coke are formed at the production stage and changed at the subsequent stages of the life cycle. The "customer delivery" stage happens after the production and before the use of foundry coke. According to the GOST R 9001-2015 requirements, foundry coke quality must be managed on all stages of the life cycle. This paper considers the impact of the life cycle on the quality of foundry coke using the "customer delivery" stage as an example. To estimate the degree of destruction of foundry coke sample during transportation, we introduced a destruction index, which is a relative change in the mass of samples (RT, %). Tests have shown that 20% to 40% of samples, depending on the batch, of the 80 mm and larger size class split and formed coke of the 60–80 mm and smaller than 40 mm size classes, and 20% of samples of the 60–80 mm size class split and formed the smaller than 40 mm size class. At the same time, the 80 mm and larger size class remained completely the same. The content of the 80 mm and larger size class decreased by 6.2% on average after transporting over a distance of 2,100 km, while the content of the 60–80 mm and smaller than 40 mm size classes increased by 5.55% and 0.7% on average respectively. After transporting foundry coke over a distance of 900 km, the content of the smaller than 40 mm size class increases by 0.25–1.41% depending on the batch. The largest increase of content of the smaller than 40 mm size class is typical for foundry coke with a minimum strength value of M40. After transporting foundry coke over a distance of 300, 900, and 2100 km, the smallest destruction index RT was observed for the batch with the maximum strength value of M40. After changing the transportation distance from 900 to 2100 km, the destruction index increased from 0.68% to 1.1% depending on the coke batch.

Ключевые слова Foundry coke, life cycle, quality, transportation, strength, tests
Библиографический список

1. Babich A., Senk D. 13 – Coke in the iron and steel industry. New Trends in Coal Conversion Combustion. Gasification, Emissions, and Coking. 2019. pp. 367–404.
2. Lazzarin R. M., Noro M. Energy efficiency opportunities in the production process of cast iron foundries: An experience in Italy. Applied Thermal Engineering. 2015. Vol. 90. pp. 509–520.
3. Ivanova V. А., Pobegalova Е. О. Systematization of properties and parameters of foundry cokes. Part 2. Physical properties. Chernye Metally. 2019. No. 10. pp. 33–37.
4. Pankaj P. K., Kushwaha S. K., Manjhi K. K. et. al. Effect of Coal-Blend Crushing on Coke Quality. International Journal of Coal Prep. and Utiliz. 2017. Vol. 37. No. 3. pp. 124–130.
5. Smędowski Ł., Piechaczek M. Impact of weathering on coal properties and evolution of coke quality described by optical and mechanical parameters. International Journal of Coal Geology. 2016. No. 168. Part. 1. pp. 119–130.
6. GOST R 9001–2015. Quality management system. Requirements. Introduced: 01.11.2015.
7. GOST R 53791–2010. Resources saving. Stages of products technological cycle. General principles. Introduced: 01.01.2011.
8. GOST R 15.000–2016. System of product development and launching into manufacture. Basic provisions. Introduced: 01.07.2017.
9. GOST 22235–2010. Freight cars for 1520 mm gauge main line railways. General requirements for safety in loading-unloading and shunting operations. Introduced: 01.05.2011.
10. Ivanova V. А., Shamina Е. О. Dependence of moisture of foundry coke on its properties and humidity of the environment. Chernye Metally. 2018. No. 6. pp. 6–10.
11. Ivanova V. А., Shamina Е. О. Influence of transportation conditions on the quality of foundry coke. Izvestiya Samarskogo nauchnogo tsentra RAN. 2018. Vol. 20. No. 4-1. pp. 18–24.
12. Nefedov P. Ya., Strakhov V. М. The quality and efficiency of the use of foundry coke in cupolas. Koks i khimiya. 2003. No. 7. pp. 16–26.
13. GOST 3340–88. Hard coal foundry coke. Specifi cations. Introduced: 01.01.1990.
14. Technical specifi cation 0761-032-00187852–2015. Coal foundry coke. Specifications, 2015. 13 p.
15. GOST R 51909–2002. Environment stability test methods for machines, instruments and other industrial products. Tests for transportation and storage. Introduced: 01.07.2003.
16. GOST R 51908–2002. General requirements for machines, instruments and other industrial products as to storage and transporting conditions. Introduced: 01.07.2003.
17. GOST RV 20.57.305–98. . Integrated quality control system. Military equipment, instruments, devices and equipment. Test Methods for mechanical factors. Introduced: 09.07.1998.
18. GOST 5954.1–91 (ISO 728–81) Coke. Sieve analysis (nominal top size greater than 20 mm). Introduced: 01.01.1993.

Language of full-text русский
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