Improvement of equipment for transport of slurry in mineral processing production

Povetkin, Vitaly; Kerimzhanova, Manshuk Fazylovna; Орлова, Е П; Bukayeva, Amina

doi:10.25018/0236-1493-2018-6-0-161-169

Cited by 5 publications

(7 citation statements)

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“…The catastrophic size of hydro-abrasive destruction of pump impellers testifies to the great destructive power of the water flow containing abrasive particles [20].…”

Section: Evaluation Of Wear Resistance Of Ground Pump Partsmentioning

confidence: 99%

Development of a technology of gas-flame application of powders to increase wear resistance and adhesion strength

Yermekov

Povetkin

Rutkūnienė

et al. 2021

EEJET

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Every year, the world economy suffers enormous losses due to wear and corrosion of machine parts and equipment. With targeted preventive protection against wear and tear, these losses can be avoided. Along with the coating of new parts, this includes the restoration of worn parts. An effective method is the surfacing of materials with high performance properties. The quality of hardened parts depends on the properties of deposited material, so hardening material or alloy is selected taking into account the working environment of the part and the coating method. Today there are many self-fluxing surfacing powder alloys based on nickel, copper and others, obtained by different methods. The paper discusses the process of studying the gas-flame application of powders to increase wear resistance and adhesion strength. Experimental studies have been carried out to determine the optimal composition of the CrB2 master alloy introduced into the composition of the GP-Ir40 surfacing alloy. It has been found that to obtain the hardness of the deposited metal in the range of 450–600 HV, it is necessary to introduce CrB2 into the coating composition, within 10 % of the total mass. Thus, the strength of the alloy is increased by more than 54.41 HV. Tests for corrosion resistance in aggressive environments of hydrogen sulfide H2S, sulfuric acid H2SO4 were carried out. The wear resistance of ground pumps was evaluated, and the service life of wear-resistant ground pump parts made of the IChH28N2 alloy was determined. The new developed self-fluxing surfacing powder material based on iron with a hardening additive will be used to restore machine and equipment parts operating under conditions of abrasive wear, corrosion and elevated temperatures or corrosive environments

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“…The catastrophic size of hydro-abrasive destruction of pump impellers testifies to the great destructive power of the water flow containing abrasive particles [20].…”

Section: Evaluation Of Wear Resistance Of Ground Pump Partsmentioning

confidence: 99%

Development of a technology of gas-flame application of powders to increase wear resistance and adhesion strength

Yermekov

Povetkin

Rutkūnienė

et al. 2021

EEJET

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“…The authors of the works [11], [12] point out the main structural-and-technological directions that improve the operating characteristics of withdrawal centrifugal pumps:…”

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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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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“…Ground pumps are mass units for the transport of crushed ore in aqueous media. The formed water abrasive medium has a high destructive capacity, so that the ground pumps, due to the intensive wear of working parts, have a low service life [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…The service life of parts of the pump-armored disk, impeller, does not exceed 20 days of work, after which it is neces-sary to stop the pump and carry out repair work to replace worn parts. That requires considerable losses of working time of the basic equipment of concentrating manufacture and a large volume of spare parts [2].…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of the problem of operation of ground pumps has shown that ground pumps at the enterprises of mining and processing manufacture do not meet the requirements on reliability and power consumption indicators. The main drawback of ground pumps is the low service life of parts of the pump flow part due to the action of hydroabrasive and cavitation wear [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the design of hydraulic transport devices for the transport of hydroabrasive media in the enrichment industry

Seitkhanov

Povetkin

Bektibay

et al. 2019

EEJET

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Гідротранспортне обладнання гірничо-збагачувальних комбінатів має низьку експлуатаційну надійність, недостатній робочий ресурс через інтенсивний гідроабразивний знос робочих поверхонь трубопроводів і насосного обладнання, недоліки конструкцій деяких вузлів ґрунтових насосів та їх експлуатацію. Значний гідроабразивний знос основного елемента конструкції грунтового насосаробочого колеса, викликає додаткові збурюючі динамічні сили, що призводить до підвищеної вібрації агрегату і, отже, до передчасного виходу його з ладу. Питанням впливу гідроабразивного зносу робочого колеса ґрунтових насосів на термін служби їхніх установок і їхній ресурс, до теперішнього часу, приділялася недостатня увага. Виконано аналіз прояву кавітаційного зносу деталей проточної частини грунтових насосів, намічені заходи зниження кавітації за рахунок сприятливих умов надходження рідини в насос і зниження вакуумметричної висоти всмоктування. Запропоновано також ряд заходів технологічного та конструктивного рішення, зниження шкідливого впливу кавітації. Обрані та проаналізовані матеріали для виготовлення деталей відцентрового грунтового насоса, що володіють високими експлуатаційними якостями, мають високий ресурс роботи. Ці сплави показали високу корозійну стійкість через високий вміст в них хрому. Намічено шляхи вдосконалення конструкції деталей відцентрового грунтового насоса, що дозволяє підвищити ресурс їхньої роботи, створити автоматизовану систему діагностування стану конструкції в цілому Ключові слова: грунтовий насос, робоче колесо, бронедиск, гідроабразивний знос, дроселювання, вимірювальний стенд UDC 621.

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Improvement of equipment for transport of slurry in mineral processing production

Cited by 5 publications

References 0 publications

Development of a technology of gas-flame application of powders to increase wear resistance and adhesion strength

Development of a technology of gas-flame application of powders to increase wear resistance and adhesion strength

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

Improvement of the design of hydraulic transport devices for the transport of hydroabrasive media in the enrichment industry

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