Optimization of the Process of Unloading of Iron Ore Raw Materials: The Case of a Steel Plant

The process of unloading iron ore raw materials of the metallurgical plant to the sinter plant has not been considered for a long time as a particular topic. Over the last years the conditions of metallurgical production have undergone certain changes: its intensification has occurred, which entails the need to re-evaluate parameters of stable operation of sinter production. The objective of the suggested study is to consider the issues of possible technical and technological improvement harmonizing transport flows with the requirements of the main production process. To achieve this goal, a technique of mathematical modelling is used, based on the mathematical apparatus of linear programming; graphic-analytical method; method of probability theory.

The issues of the process of unloading, storage of iron ore raw materials, of their preparation for sinter production are primarily considered.

The article presents the main positions of the process of optimizing unloading of sinter batch of a metallurgical plant.

The general characteristics of the technology of metallurgical production and of each particular process are described. The agglomeration process is considered in more detail. The tables of initial iron ore raw materials for sintering production for certain reporting periods are given, for the sake of clarity, the data of one of the tables are summarized in a diagram. A diagram of a standard trestle-type ore warehouse is considered, which sequentially shows the main processes of sintering production from supply of raw materials to the car dumper to getting through a belt conveyor into a stack, and then into receiving bins. The article also provides an example of formation of piles of iron ore raw materials using manganese limestone.

The study is based on a dynamic transport problem with delays (DTPD), which considers time of transportation of goods, the dynamics of production volumes over time, the dynamics of consumption, the dynamics of stocks of suppliers and consumers, dynamics of cost of transportation and storage, dynamics of cost of consumption losses. The study contains several mono-problems with a mono load, which overlap each other, forming a multiplicative overlay of single-product problems.

1. Popov, A. T., Suslova, O. A., Voronkova, E. A. Theoretical foundations of optimization of the process of unloading iron ore raw materials on the example of a metallurgical plant [Teoreticheskie osnovy optimizatsii protsessa vygruzki zheleznorudnogo syriya na primere metallurgicheskogo kombinata]. Bulletin of Lipetsk State Technical University, 2020, Iss. 2 (43), pp. 36–40.

2. Kudrin, V. A. Metallurgy of steel [Metallurgiya stali]. Moscow, Metallurgiya publ., 1989, 560 p.

3. Harrison, A., van Hoek, R. Logistics Management and Strategy. Competing through the supply chain. 3rd edition. Prentice hall financial times, 2008, 343 p. [Electronic resource]: https://docviewer.yandex.ru/?lang=en&tm=1600715022&tld=ru&name=Logistics+Management+and+Strategy+Competing+Through+the+Supply+Chain.pdf&text=2.+Alan+Harrison%2C+Remko+van+Hoek.+Logistics+Management+and+Strategy%3A+competing+through+the+supply+chain&url=https%3A//vulms.vu.edu.pk/Courses/MGMT615/Downloads/Logistics%2520Management%2520and%2520Strategy%2520Competing%2520Through%2520the%2520Supply%2520Chain.pdf&lr=213&mime=pdf&l10n=ru&sign=7a09cc4c3f45d00889f1763e4f234aa5&keyno=0. Last accessed 11.12.2019.

4. Ryaboshuk, S. V., Kovalev, P. V., Kur, A. A. Raw materials base of metallurgy [Syrievaya baza metallurgii]. St. Petersburg, 2018, 60 p.

5. Galaburda, V. G. Single transport system: Textbook for universities [Edinaya transportnaya sistema: Uchebnik dlya vuzov]. Moscow, Transport publ., 1996, 295 p.

6. Rakhmangulov, A. N. Railway transport and technological systems: organization of functioning: Monograph [Zheleznodorozhnie transportno-tekhnologicheskie sistemy: organizatsiya funktsionirovaniya: Monografiya]. Magnitogorsk, Nosov Magnitogorsk State Technical University, 2014, 300 p.

7. Kozlov, P. A., Milovidov, S. P., Popov, A. T. Organization of work of technological transport in industrial systems [Organizatsiya raboty tekhnologicheskogo transporta v promyshlennykh sistemakh]. Ekonomika i matematicheskie metody, 1986, Iss. 4 (22), pp. 697–703.

8. Kozlov, P. A., Vladimirskaya, I. P. Ways to improve validity of technological solutions: problems and judgments [Puti povysheniya obosnovannosti tekhnologicheskikh reshenii: problemy i suzhdeniya]. Bulletin of VNIIZhT: Scientific and technical journal, 2009, Iss. 3, pp. 8–13.

9. Popov, A. T., Gnedash, M. A. Optimization of transport flows in the system «production–transport– consumption»: Monograph [Optimizatsiya transportnykh potokov v sisteme «proizvodstvo–transport–potreblenie»: Monografiya]. Lipetsk, LSTU publ., 2006, 179 p.

10. Popov, A. T., Suslova, O. A., Voronkova, E. A. Optimization of interaction between agglomeration and blast-furnace production on the basis of a dynamic transport problem with delays [Optimizatsiya vzaimodeistviya aglomeratsionnogo i domennogo proizvodstva na osnove dinamicheskoi transportnoi zadachi s zaderzhkami]. Bulletin of Lipetsk State Technical University, 2018, Iss. 2 (36), pp. 66–74.

11. Popov, A. T. Optimization of interaction of technological railway transport and production (using an example of a metallurgical plant). Ph.D. (Eng) thesis [Optimizatsiya vzaimodeistviya tekhnologicheskogo zheleznodorozhnogo transporta i proizvodstva (na primere metallurgicheskogo kombinata). Dis … kand. tekh. nauk]. Moscow, MIIT publ., 1984, 237 p.

12. Nesterov, E. P. Transport problems of linear programming [Transportnie zadachi lineinogo programmirovaniya]. Moscow, Transport publ., 1971, 216 p.

13. Kantorovich, L. V., Gorstko, A. B. Mathematical optimal programming in economics [Matematicheskoe optimalnoe programmirovanie v ekonomike]. Moscow, Znanie publ., 1968, 96 p.

14. Phillips, D. T., Garcia-Diaz, A. Fundamentals of Network Analysis. Prentice-Hall, Englewood Cliffs, 1981, 474 p. [Electronic resource]: https://books.google.ru/books/about/Fundamentals_of_network_analysis.html?id=w2FRAAAAMAAJ&redir_esc=y. Last accessed 25.02.2020.

15. Ford, L. R., Fulkerson, D. R. Flows in Networks. New Jersey: Princeton university press Princeton, 1962, 212 p. [Electronic resource]: https://www.rand.org/content/dam/rand/pubs/reports/2007/R375.pdf. Last accessed 25.02.2020.