Equipment. Technologies. Materials

DETERMINATION OF THE RELATIONSHIP BETWEEN THE WEAR RATE OF GRINDING BALLS IN THE SAG MILL MILL AND THE PARAMETERS THAT CONTROL THE PROCESS

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Published: Monday, 25 January 2021 17:42

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Volume 5 (1), January 2021, Pages 25-27

Famil Hamidov

“Azerbaijan International Mining Company”, Grinding manager.

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 Аbstract

Since the end of the 20th century and the beginning of the 21st century, as a result of the large-scale implementation of the industrialization policy in Azerbaijan, a large number of industrial enterprises with powerful potential have been created. Based on this, the volume of industrial production over the past 10-15 years has increased 2.7-3.0 times. The current state of the country's economy has created ample opportunities for the development of the non-oil sectors along with the oil sector. At the same time, attention is drawn to the variety and speed of work on the extraction of precious metals. Azerbaijan International Mining Company (AIMC) is one such company and is currently engaged in exploration, production and processing at the Gadabay deposit. The high technology used here and the associated equipment and tools emphasize the need to apply and update recovery technologies, as well as various improvements over time. One of the main directions of scientific and practical work carried out here is to increase the resistance of grinding balls to corrosion. The article is devoted to determining the relationship between the wear rate of grinding balls of a semiautogenous grinding mill and the parameters that control the process.

Keywords: industrialization, industrial production, non-oil sector, mining company, drum mill, grinding balls, wear, the relationship between process controllers.

NATIONAL ECONOMIC SIGNIFICANCE UNDER THE CONDITIONS OF THE ECONOMY OF KNOWLEDGE OF CASTING PRODUCTION AND THE KEY DIRECTIONS OF ITS DEVELOPMENT

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Published: Monday, 25 January 2021 17:20

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Volume 5 (1), January 2021, Pages 16-20

Elman Aliyev

Azerbaijan State Oil and Industry University, R. L. "Nanomaterials and Nanotechnology" Deputy director

PhD in Economic (Baku, Azerbaijan).

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 Аbstract

The modern economy is increasingly based on knowledge and, more broadly, on intangible assets that ensure sustainable innovation growth. The formation of an innovative type of knowledge economy can be considered one of the fundamental development trends at the global level. The modernization of the economy in the lifetime period means the introduction of modern technologies, increasing energy efficiency and labor productivity, producing high-quality products according to the most advanced standards. Ultimately, this is the creation of a competitive economy.

Keywords: Casting, billet, castings, method of making castings, injection molding, centrifugal casting, investment casting, shell casting, chill casting.

CYCLIC TORSION WITH INTERNAL PRESSURE OF PRE-STRETCHED THINWALLED CYLINDERS

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Published: Monday, 25 January 2021 17:30

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Volume 5 (1), January 2021, Pages 21-24

¹Alasgar Gulgazli, ²Ali Hikmat Ahmadov

¹Azerbaijan State Oil and Industry University, Doctor of Technical Sciences, Professor (Azerbaijan)

²Azerbaijan State Oil and Industry University, PhD in Technical Sciences. Associate professor.

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 Аbstract

The article considers the following two tasks. 1) Strength calculations are carried out for a long thin-walled cylinder, the ends of which are not closed during reloading. At the first loading, the thin-walled cylinder is stretched by a longitudinal force leading to longitudinal plastic deformations. When reloaded, the cylinder twists and at the same time uniform pressure acts from the inside. It is noted that, in particular, the shaft of wind generators is subjected to such loading. It is proved that the equation of the yield curve in the plane of the normal and tangential stresses of the stress space is an ellipse, whose semi axes are a function of the mechanical characteristics of the material and the residual stresses after the first loading. 2) We consider cyclic twisting with internal pressure of pre-stretched thin-walled cylinders. The yield surface equation is obtained for a thin-walled cylinder under repeated loading τ + p. which stretched upon first loading. It is proved that the yield surface equations also yield the fatigue surface equations if the yield stress σT. is replaced by the fatigue stress σ0. Expressions are found for the number of cycles required for fatigue failure under an asymmetric loading cycle under repeated loading. It is proved that in order to increase the number of cycles required for fatigue fracture, during the first loading, when the material is strengthened due to plastic deformation, and with repeated cyclic loading, the same stress components must take place. It is proved that if during repeated loading the end of the loading path is inside the endurance surface, then the number of cycles required for fatigue failure in an asymmetric loading cycle tends to infinity.

Keywords: initial loading, reloading, cyclic loading, strength, fatigue failure, plastic deformation, residual stress, yield surface.

RESEARCH OF Al AND Mg MATRİX HYBRİD LAMİNATED COMPOSİTE MATERİALS

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Published: Monday, 25 January 2021 17:14

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Volume 5 (1), January 2021, Pages 11-15

¹Mustafa Babanli, ²Yusif Tanriverdiyev

¹Azerbaijan State Oil and Industry University, Doctor of Technical Sciences, Professor. (Azerbaijan)

²Azerbaijan State Oil and Industry University, “Intelligent Control and Decision Making Systems in Industry and Economics Research Laboratory”, Engineer.

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 Аbstract

The main purpose of this research is to select suitable matrices and fillers for the preparation of composites that meet modern requirements to meet the needs of a rapidly growing industry. Studies in various databases have shown that metal-matrix hybrid laminated composite materials, mainly aluminum and magnesium alloy plates, are used as matrix materials, while carbon-based nanomaterials are used as fillers.

Keywords: composition, matrix, aluminum, magnesium.