Studying fiber­reinforced concrete for casting housing parts of pumps

Krupnik, L. A.; Yelemessov, Kassym; Bortebayev, Saiyn; Baskanbayeva, Dinara

doi:10.15587/1729-4061.2018.151038

Cited by 11 publications

(11 citation statements)

References 4 publications

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“…A decrease in the spherical granules diameter during sintering from 9-10 to 6-7 mm, caused by an increase in density to 4.6-4.8 g/cm 3 , provides a higher residual magnetization, as well as a higher squareness of the hysteresis loop [20] and, consequently, the maximum magnetic energy of ferrite spherical granules field after magnetization. Thus, the complete cycle of sintering is 24 hours, resulting in dense, hard spherical granules of black-graphite colour, shown in Figure 6.…”

Section: Figure 4 the Spherical Granules Obtained As A Results Of Barium Ferrite Powder Spheroidization: Colourred-brown; Surfacesmooth Mmentioning

confidence: 99%

“…Development and improvement of technologies aimed at increasing the operational lifetime of the equipment for pumping-out underground water in the iron-ore industry is very acute and pressing production problem [1]- [3], since the removal of groundwater, formed inevitably both from open pits and underground mines of the mining industry, is accompanied by wear of centrifugal power pumps, suction and transporting pipelines, as well shut-off devices. When exploiting the pumping equipment, abrasive wear mainly oc-curs, since during the iron ore extraction, insoluble magnetic and weakly-magnetic hard particles are present in the groundwater in a suspended state, which, passing through the system, inevitably penetrate into the gaps of the moving pump surfaces [4].…”

Section: Introductionmentioning

confidence: 99%

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Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater

Biloshytskyi¹,

Tatarchenko²,

Biloshytska³

et al. 2021

Min. miner. depos.

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Purpose. Solving the problem of increasing the pumping equipment operational lifetime when pumping-out contaminated groundwater in the iron-ore industry by extracting the hard, abrasive part, using magnetic filters based on permanent ferrite magnets. Methods. To produce spherical hard-magnetic ferrite elements that catch finely-dispersed magnetic and weakly-magnetic abrasive particles when pumping-out contaminated groundwater in the iron-ore industry, barium ferrite powder BaО∙6Fe2O3 is applied, which is usually used for obtaining hard-magnetic ferrites. Spherical elements for filling a magnetic filtering installation are obtained by the method of spheroidizing the barium ferrite powder in a dragee machine. Sintering of spherical granules obtained from barium ferrite powder is conducted in a high-temperature atmospheric electric box furnace. The sintered spherical elements made of hard-magnetic barium ferrite are magnetized using a magnetic pulsed toroidal-shaped setup in a pulsed constant magnetic field. Findings. For continuous pumping-out and purification of contaminated groundwater from magnetic, weakly-magnetic and non-magnetic highly abrasive particles with the help of magnetic filters, a scheme of a filtering installation of two sections is pro-posed. A technology for producing spherical permanent magnets from barium ferrite powder has been developed for a filtering installation, which includes a coarse purification column with hollow-spherical permanent magnets of 16-17 mm in diameter and a fine purification column with full-bodied spherical barium ferrite magnets of 6-7 mm in diameter. Originality.The term of pumping equipment operation is doubled if to eliminate abrasive wear due to the filtering two-section installation by filling with barium ferrite spherical magnets. In the case of changing the filter, idle time is reduced by using the supplementary auxiliary column. The possibility of processing filtration products and their use in the field of construction and metallurgy without environmental pollution is substantiated. Practical implications. The scheme of magnetic groundwater purification in the iron-ore industry is proposed, consisting of a filtering column of coarse and fine purification from abrasive particles. A technology for producing spherical magnets with different diameters has been developed to ensure the quality of the process. The research results allow to increase the operational lifetime of pumping equipment by eliminating abrasive wear, which will lead to significant savings in the replacement and repair of centrifugal pumps. Keywords: pumping equipment, groundwater, wear, barium ferrite, spherical magnet, filter, iron-ore industry

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Section: Figure 4 the Spherical Granules Obtained As A Results Of Barium Ferrite Powder Spheroidization: Colourred-brown; Surfacesmooth Mmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater

Biloshytskyi¹,

Tatarchenko²,

Biloshytska³

et al. 2021

Min. miner. depos.

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“…During the studies a complex methodology was applied, which included analytical review of sources of literature, theoretical studies of polymer concrete and fibre concrete mixtures structures, experimental studies of the impact on the methods of preparation of mixtures and technology of casting the gear and pumps casings of different factors with verification of the results through casting and testing of finished products made from polymer concrete and fibre concrete. Experimental studies were carried out on special test beds, and their results were processed by the methods of mathematical statistics on standard methods [4]. This ensured high confidence of acquired results and allowed development of technological manuals on preparation of polymer concrete and fibre concrete mixtures and technology of casting the gear and centrifugal pumps casings from them.…”

Section: Methodsmentioning

confidence: 99%

“…It is expedient to replace the traditionally used metals with composite materials which have improved characteristics. [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned above the composite polymer concrete and fibre concrete are quite widely used in construction materials industry. They are quite thoroughly researched [4,5]. However, in engineering industry, especially for mining and metallurgical sector equipment, such researches are almost not available and this prevents the application of composite materials instead of traditional ones.…”

Section: Introductionmentioning

confidence: 99%

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Polymer concrete and fibre concrete as efficient materials for manufacture of gear cases and pumps

et al. 2020

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The paper describes the results of investigations on application of composite materials – polymer concrete and fibre concrete for manufacture gear cases of mechanisms used in mining and metallurgical industry centrifugal pump casings. The methods of establishing efficient compositions of polymer concrete and fibre concrete, based on a filler with gapped grading in which the pinholes in coarse fractions are filled with smaller fractions have been developed. After hardening, such mixtures have the strength 1.5...2 times higher than the items made of metal. The efficient additive of steel fibre to fibre concrete has been identified which improves the strength characteristics. The regularities of the impact on the strength and structure of polymer concrete and fibre concrete of the rotation frequency of the working element of the mixer and time of mixing the mixture components are identified. TS-250 gear and centrifugal pump casings are made by casting method and are tested on a test bed. The results obtained make it possible for us to recommend the developed compositions of polymer concrete and fibre concrete for application in engineering industry to manufacture gear and centrifugal pump casings.

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Efficiency of application of fiber concrete as a material for manufacturing bodies of centrifugal pumps

et al. 2021

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The report presents the results of research on the use of composite material - fiber-reinforced concrete for the manufacture of centrifugal pump bodies. The, optimal composition of fiber-reinforced concrete with the required strength characteristics has been established. The method of casting a pump body and the results of industrial tests to determine the technological parameters of a centrifugal pump are presented. The results obtained showed that fiber-reinforced concrete bodies have an advantage over metal ones and can be recommended for use in mechanical engineering in the manufacture of centrifugal pump bodies.

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Studying fiberreinforced concrete for casting housing parts of pumps

Cited by 11 publications

References 4 publications

Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater

Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater

Polymer concrete and fibre concrete as efficient materials for manufacture of gear cases and pumps

Efficiency of application of fiber concrete as a material for manufacturing bodies of centrifugal pumps

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Studying fiber­reinforced concrete for casting housing parts of pumps

Cited by 11 publications

References 4 publications

Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater

Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater

Polymer concrete and fibre concrete as efficient materials for manufacture of gear cases and pumps

Efficiency of application of fiber concrete as a material for manufacturing bodies of centrifugal pumps

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Product

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Studying fiberreinforced concrete for casting housing parts of pumps