Науковий вісник НГУ

Justification of rational parameters for manufacturing pump housings made of fibroconcrete

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Category: Contens №5 2020

Last Updated on 31 October 2020

Published on 30 October 2020

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Authors:

D. D. Baskanbayeva, orcid.org/0000-0003-1688-0666, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

L. A. Krupnik, Scientific and Technical and Industrial Mining Magazine of Kazakhstan, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

K. K. Yelemessov, orcid.org/0000-0001-6168-2787, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

S. A. Bortebayev, orcid.org/0000-0002-8761-3429, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A. E. Igbayeva, orcid.org/0000-0002-4825-454X, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2020, (5): 068-074

https://doi.org/10.33271/nvngu/2020-5/068

Abstract:

Purpose. Establishment of patterns of influence of the main factors on the physicomechanical characteristics of fiber concrete, which is advisable to use for the manufacture of pump housings operating in adverse conditions.

Methodology. The work uses theoretical analysis of fiber concrete application in various industries, analysis of factors affecting fiber concrete strength; laboratory experiments are conducted to confirm theoretical results and identify regularities allowing recommending rational parameters of production of pump casings from fiber concrete.

Findings. The work attempts to offer technological solutions for the use of fiber concrete in a new field – mechanical engineering – in the manufacture of pump housings operating in the mining and metallurgical industry in unfavorable conditions such as pumping of aggressive liquids, highly abrasive pulp, high ambient temperature, dust, and others. The obtained results allow developing centrifugal pump housing casting technology without additional mechanical treatment and with high physical and mechanical characteristics as well as recommending rational composition of the fiber concrete mixture, meeting requirements to centrifugal pump housings according to strength conditions, manufacturability and economy.

Originality. The regularities of the effect on the strength of fiber concrete of the optimal content of steel fiber in the composition of the mixture as well as rational modes of mixing components are established experimentally. They are rotational speed of a mixer working part and mixing time of the components. The obtained regularities confirm theoretical studies and provide obtaining of the fiber concrete mixture with uniform distribution of all components in its volume as well as isotropic characteristics of solidified fiber concrete.

Practical value. The obtained results, presented in graphs and calculation formulas, make it possible to reasonably design composition of the fiber concrete mixture and to develop the technology of making centrifugal pump housings from it by a casting method without additional mechanical treatment. At the same time fiber concrete has density of 2200–2300 kg/m³ versus 7500–7800 kg/m³ of metal bodies, compression strength of 230–240 MPa, bending strength of 80–100 MPa. All these allow reducing thickness of a pump housing wall by 15–20 %.

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