Log in

Relevant bibliographies by topics / Hydrotransport / Journal articles

To see the other types of publications on this topic, follow the link: Hydrotransport.

Journal articles on the topic 'Hydrotransport'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 April 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Hydrotransport.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Semenenko, Yevhen, Serhii Dziuba, Larysa Tatarko, and Zinaida Yakubovska. "Determination of the critical rate of hydrotransport based on measurements in supercritical flow conditions." E3S Web of Conferences 109 (2019): 00082. http://dx.doi.org/10.1051/e3sconf/201910900082.

Full text

Abstract:

The article solves the actual problem of determining the value of the critical rate of hydrotransport for a specific hydrotransport unit in terms of its operation in supercritical flow conditions, without violating the process regulations and the required freight traffic for processing. Based on the analysis and generalization of the known methods of calculating the parameters of hydrotransport, a methodical approach was proposed for determining the value of the critical rate of hydrotransportation according to the dependence of the hydraulic slope on the speed and concentration of the slurry. The efficiency of the developed methodology was proved based on the results of measurements of the parameters of the Vilnohirsk State Mining and Metallurgical Plant hydrotransport complex in supercritical conditions. The reliability of the developed technique is confirmed by the fact that the relative error in determining the critical rate of hydrotransport according to the methods improved by the author does not exceed 7 %, and in determining the hydraulic slope does not exceed 6 %, respectively.

APA, Harvard, Vancouver, ISO, and other styles

2

Mihajlović, Slavica, Ljubinko Savić, Dragana Radosavljević, Ljiljana Savić, Marina Blagojev, and Slavomír Hredzák. "Theoretical analysis of hydromixture transport." Podzemni radovi, no. 37 (2020): 41–49. http://dx.doi.org/10.5937/podrad2037041m.

Full text

Abstract:

This paper presents theoretical considerations and working parameters analyzes of hydrotransport during unstable flow. The variable flow of hydraulic mixture in installations causes unsteady operation and pipes spraying, pump damage, obturation in various sections of the pipeline, reduced capacity as well as higher operating costs. Using mathematical equations presented in this paper, such parameters of the hydraulic mixture, hydrotransport installation and control devices can be determined which protect system from possible clogging. Considering the fact that critical speed of hydraulic mixture depends on transported material grain size, mixture volume mass, diameter of pipeline and specific gravity of solid phase, it is possible to accurately analyze obturation in hydrotransport installations depending on those parameters. In order to prevent hydraulic impacts in hydrotransport installation pipelines, which value can be determined mathematically, it is necessary to adjust installation to hydromixture parameters and pump, or vice versa.

APA, Harvard, Vancouver, ISO, and other styles

3

Semenenko, Yevhen, Stepan Kril, Olha Medvedieva, Nina Nykyforova, and Larysa Tatarko. "Calculation of pressure loss and critical velocity for slurry flows with additive agents in vertical polyethylene pipelines." E3S Web of Conferences 109 (2019): 00083. http://dx.doi.org/10.1051/e3sconf/201910900083.

Full text

Abstract:

The method of determination of parameters of hydrotransport of solid polydisperse materials in vertical pipelines is offered. The reasons of discrepancy between estimated and observed data when using A. Smoldyrev’s method for calculation of hydraulic gradient and critical velocity in vertical steel pipelines are analysed. Particularly non-applicability of Velicanov principle to hydrotransport of solid materials in vertical pipelines is proved and contribution of particles fall velocity to the value of complementary hydraulic gradient in vertical pipelines is estimated. Suggested formulas for calculation of hydraulic gradient and critical velocity in vertical pipelines are multipurpose because they may be used for calculation of hydrotransport parameters in steel and polymeric vertical pipelines with using of friction reducing agents and without it. The method for parameters calculation of solid materials hydrotransport in vertical polymeric pipelines is first offered. Elaborated formulas ensure also increasing of accuracy of calculations.

APA, Harvard, Vancouver, ISO, and other styles

4

Arifjanov, Aybek, Kudrat Rakhimov, Dilbar Abduraimova, Askar Babaev, and Sarvar Melikuziyev. "Hydrotransport of river sediments in hydroelelators." IOP Conference Series: Materials Science and Engineering 869 (July 10, 2020): 072003. http://dx.doi.org/10.1088/1757-899x/869/7/072003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

SELLIN, RHJ. "DRAG REDUCING POLYMER USE IN HYDROTRANSPORT." Proceedings of the Institution of Civil Engineers 86, no. 2 (April 1989): 381–94. http://dx.doi.org/10.1680/iicep.1989.1631.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Parent, L. L., and D. Y. Li. "Wear of hydrotransport lines in Athabasca oil sands." Wear 301, no. 1-2 (April 2013): 477–82. http://dx.doi.org/10.1016/j.wear.2013.01.039.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Sanders, R. Sean. "International Conference on Hydrotransport special issue section: Preface." Canadian Journal of Chemical Engineering 94, no. 6 (April 28, 2016): 1017–18. http://dx.doi.org/10.1002/cjce.22488.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

McTurk, J., P. Batty, and D. W. Ellis. "Hydrotransport system simulation modeling for Syncrude's North Mine." International Journal of Surface Mining, Reclamation and Environment 10, no. 2 (January 1996): 97–102. http://dx.doi.org/10.1080/09208119608964807.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Udovyk, I. M., A. I. Simonenko, O. A. Zhukova, and S. D. Prykhodchenko. "Electromechanics system modelling of hydrotransport at an enrichment plant." Scientific Bulletin of National Mining University 1 (2018): 112–18. http://dx.doi.org/10.29202/nvngu/2018-1/12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sanders, R. Sean, Alan L. Ferre, Waldemar B. Maciejewski, Randall G. Gillies, and Clifton A. Shook. "Bitumen effects on pipeline hydraulics during oil sand hydrotransport." Canadian Journal of Chemical Engineering 78, no. 4 (August 2000): 731–42. http://dx.doi.org/10.1002/cjce.5450780416.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Makharadze, Leon. "Equipment for Damping Hydraulic Shocks in Pressure Hydrotransport Facilities." Works of Georgian Technical University, no. 3(521) (September 29, 2021): 130–36. http://dx.doi.org/10.36073/1512-0996-2021-3-130-136.

Full text

Abstract:

Newly developed equipment for damping hydraulic shocks in pressure hydrotransport facilities is reviewed in this article. This equipment includes a discharge, safety diaphragm, as well as a flexible diaphragm, which is connected to the main pipeline at both different ends of the backpressure valve. A rupture disc is attached to it from below and load is attached from above by means of a rod, so that it can efficiently act during movement of hydraulic fluid in the central main pipeline, i.e. when the flow to be transported contains abrasive contaminant of solid material. The load represents a piston, which is rigidly connected to the flexible diaphragm and the rupture disc and creates an airproof space filled with viscous fluid. At the same time, the lower space is isolated from the main pipeline by a flexible separating element before the backpressure valve and the upper space is also isolated by a flexible separating element located after the back pressure valve.

APA, Harvard, Vancouver, ISO, and other styles

12

Bagazeev, Viktor, Niyaz Valiev, Konstantin Kokarev, and Vasiliy Startsev. "Method of placer mining by directional well drilling." E3S Web of Conferences 56 (2018): 01022. http://dx.doi.org/10.1051/e3sconf/20185601022.

Full text

Abstract:

The study aims at justifying the method for the development of placers by directed drilling of wells. A description is given of the opening of the site, the receding and oncoming scheme of the digging excavation, drilling and expansion of the wells, the main hydraulic unit with remote control. The physics-mechanical substantiation of technological parameters is given: hydro-jet erosion, the shape and size of the cleaning chambers, the adaptation of hydrotransport calculation methods. With jetting, the required flow rate and pressure of water to break rocks is based on the laws of soil mechanics. The parameters of the clearing space and the shape of the chambers are taken in accordance with the magnitude of the vault of natural equilibrium. As a determining factor in the calculation of gravity hydrotransport, the consistency of the pulp is adopted with observance of the condition necessary for the bearing capacity. To adapt the methodology for calculating the hydraulic lifting of pulp to the conditions of well development, the coefficient of dilution is taken as the main design parameter. Modeling of jetting jet in the laboratory conditions was carried out, dependences of decrease in axial pressure were obtained at removal of the face from the nozzle.

APA, Harvard, Vancouver, ISO, and other styles

13

Zych, Marcin, Robert Hanus, Leszek Petryka, Anna Strzępowicz, and Piotr Zych. "Determination of volumetric concentration of solids in vertical pipeline hydrotransport." EPJ Web of Conferences 114 (2016): 02146. http://dx.doi.org/10.1051/epjconf/201611402146.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Eskin, Dmitri, and Brian Scarlett. "Model of the Solids Deposition in Hydrotransport: An Energy Approach." Industrial & Engineering Chemistry Research 44, no. 5 (March 2005): 1284–90. http://dx.doi.org/10.1021/ie049453t.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Eskin, Dmitry. "A simple model of particle diffusivity in horizontal hydrotransport pipelines." Chemical Engineering Science 82 (September 2012): 84–94. http://dx.doi.org/10.1016/j.ces.2012.07.017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Kozhevnikov, N. N., and M. S. Triandafilov. "Improving the delivery of suction-tube dredges and hydrotransport parameters." Hydrotechnical Construction 24, no. 11 (November 1990): 697–702. http://dx.doi.org/10.1007/bf01423889.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Skrebnev, V. I., S. L. Serjan, and E. V. Kalugina. "Research of resistance to water-jet wear of plastic and steel pipes. Assessment of the main parameters that affect the wear rate of hydraulic transport systems." Plasticheskie massy, no. 9-10 (November 19, 2020): 40–44. http://dx.doi.org/10.35164/0554-2901-2020-9-10-40-44.

Full text

Abstract:

It has been found that the use of certain types of thermoplastic elastomers as a co-extruded coating of the inner surface of plastic pipe systems can significantly increase the lifetime of pipeline hydrotransport when exposed to hydraulic mixtures, in particular tailings of iron ore processing. The comparison of polyethylene and steel pipes resistance to water-jet wear is made. The influence of the concentration, dispersion, and speed of hydraulic mixtures on the wear rate is estimated.

APA, Harvard, Vancouver, ISO, and other styles

18

Salnikov, S., and G. Karandaev. "ABOUT REDUCING ENERGY CONSUMPTION DURING THE SANDS CONCENTRATION PROCESS." Bulletin of South Ural State University series "Construction Engineering and Architecture" 16, no. 3 (2016): 47–55. http://dx.doi.org/10.14529/build160306.

Full text

Abstract:

The article analyzes the results of the production study of the effect of sand-size segregation in the conical screen underflow pipeline. These results lead to the identifying of the main requirements to the construction of tapering chute. The work gives the results of the laboratory study of the tapering chute model. The results prove the possibility of sand benefication without using additional energy. The schematic diagram of sands enrichment technology in tapering chutes in the gravity hydrotransport process with the expected quality indicators is offered.

APA, Harvard, Vancouver, ISO, and other styles

19

Blyuss, B. O., Ye V. Semenenko, O. O. Medvedeva, and S. M. Kyrychko. "ESTIMATES OF RISK INFINANCING OF LOGISTIC TRANSPORT SYSTEMS OF MINING ENTERPRISES." Metallurgicheskaya i gornorudnaya promyshlennost, №6, 2018, no. 6 (2018): 43–49. http://dx.doi.org/10.33101/s069485765.

Full text

Abstract:

Purpose. The justification of the reliability and efficiency of the operation of logistics transport systems of mining enterprises taking into account the risks and peculiarities of the operation of hydrotransport systems, which is characterized by instability of the receipt of hydro-mixtures and the use of centrifugal pumps, the working point of the hydrotransportation system on the flow-pressure diagram must be within the range of possible operating modes. Methodology. An analysis of modern methods for assessing the risks of logistics transport systems functioning in the mining and metallurgical industry with periodic changes in the parameters of the lines and transported materials in order to provide regulated production indicators. Findings. It has been proved that when moving the main pulp pump station, the risk assessment should be carried out according to two constraints: the inability to provide the cargo flow, which is regulated by the needs of the enrichment industry, and the output of the system's operating point outside the scope of possible operating modes. In both cases, the risk assessment is carried out by comparing the flow rate of the hydrosmixture, which provides the hydrotransport complex after moving the main pulp pump station, with a minimum allowable and maximum allowable flow rate. In the first case, these allowable costs are determined by the rules of the work of the enrichment industry and are within the scope of possible modes of operation, and in the second, it is the abscissa of the boundaries of the region of possible operating modes. It is established that for the majority of enterprises of the mining and metallurgical industry the restrictions on the region of possible modes of operation of the hydrotransport complex will be dominant. Originality. Based on the analysis of methods for assessing the possible risks of the operation of the logistics transport systems of the enterprises of the mining and metallurgical industry, promising directions of increasing efficiency and ensuring reliability during periodic changes in the parameters of the trunk and material being transported are substantiated. Practical value.It is concluded in the improvement of the methods for calculating the permissible lengths of logistic transport trunks, which satisfy the requirements of the concentrating production in the traffic flow, with a periodic change in the parameters of the material being transported. Keywords: hydrosmixture, high concentration, flow-pressure characteristics

APA, Harvard, Vancouver, ISO, and other styles

20

Viktor K., Bagazeev, Boikov Ivan S., Valiev Niiaz G., and Zdorovets Igor L. "Heavy minerals secondary processing estimation at pulp hydrotransport in the pipeline." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII GORNYI ZHURNAL, no. 7 (November 11, 2019): 25–33. http://dx.doi.org/10.21440/0536-1028-2019-7-25-33.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Albion, Katherine, Lauren Briens, Cedric Briens, and Franco Berruti. "Flow regime determination in horizontal hydrotransport using non-intrusive acoustic probes." Canadian Journal of Chemical Engineering 86, no. 6 (December 2008): 989–1000. http://dx.doi.org/10.1002/cjce.20112.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Petryka, Leszek, Marcin Zych, Robert Hanus, Jerzy Sobota, Pavel Vlasak, Monika Śleziak, and Dariusz Świsulski. "Possibilities of radioisotope measuring in control of an unstable solid particles hydrotransport." EPJ Web of Conferences 114 (2016): 02093. http://dx.doi.org/10.1051/epjconf/201611402093.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Zych, Marcin, Robert Hanus, Pavel Vlasak, Leszek Petryka, and Marek Jaszczur. "Application of nuclear techniques in two-phase liquid-solid particles hydrotransport investigations." EPJ Web of Conferences 114 (2016): 02145. http://dx.doi.org/10.1051/epjconf/201611402145.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Alexandrov, V. I., M. A. Vasilyeva, and P. A. Vasilyeva. "Effieciency of Using Polyurethane-lined Pipes in Hydrotransport Systems of Slurry Tailings." Journal of Physics: Conference Series 1118 (December 2018): 012002. http://dx.doi.org/10.1088/1742-6596/1118/1/012002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Kolăŕ, Vaclav, Jaroslav Pollert, Robert H. J. Sellin, and Pavel Vlasak. "Experiments with a drag reducing polymer in an ash-slag hydrotransport pipeline." Journal of Hydraulic Research 26, no. 2 (March 1988): 143–58. http://dx.doi.org/10.1080/00221688809499222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Kirichko, S. N. "Design calculation of hydrotransport plant for technologies of highly-concentrated pulps storing." Геотехнічна механіка, Вип. 125 (2015): 47–56.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

27

Tarasov, V. K. "Hydrotransport and hydraulic construction and a universal method of calculating head loss." Hydrotechnical Construction 29, no. 9 (September 1995): 490–93. http://dx.doi.org/10.1007/bf02446554.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Shelontsev, V. A., I. G. Gorichev, A. V. Kuzin, and E. A. Eliseeva. "Technical Lignosulfonates Effect on Weld Corrosion in a Coal-Water Slurry." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 5 (86) (October 2019): 89–98. http://dx.doi.org/10.18698/1812-3368-2019-5-89-98.

Full text

Abstract:

Hydrotransport of coal, iron ore, bauxite and other solid materials is known to be carried out through trunk pipelines. Hydrotransport of coal in the form of highly concentrated coal-water slurries (HCCWS) makes it possible to solve a whole range of problems from environmental ones to those when HCCWS are used as a fuel for energy boilers. The HCCWS combustion efficiency is determined by the concentration of the solid pulp phase and the particle size. The highest HCCWS combustion efficiency is observed when the mass concentration of the solid phase is 60--65 % and the particle size is up to 0.02 sm. In order to achieve stability of these slurries with the solid phase concentration, various additives are used to improve the rheological properties of coal-water slurries. In particular, such plasticizing agents as sodium tripolyphosphate, technical lignosulfonates, carbon-alkaline reagents and others are used. Plasticizing agents are known to change the rheological properties of coal-water slurries but the problems of corrosion activity of plasticizing agents are not well understood, especially with respect to welded joints of pipelines. Welded joints of slurry pipelines can be represented as macro-galvanic couples, in which the weld and base metal are electrodes of a galvanic element. The current magnitude of the macro-galvanic couple can be used to calculate the local corrosion value due to the work of the galvanic element of the base metal and the weld. The paper studies the effect of technical lignosulfonates (TLS) and TLS-based compositions in a coal-water slurry on the local currents of the base metal --- weld macro-galvanic couple made of 09G2S steel. Findings of research show that in the water-coal slurry the maximum inhibitory effect is observed when 0.75 % TLS + 0.25 % K2CrO4 (Na2CO3) is added to the slurry.

APA, Harvard, Vancouver, ISO, and other styles

29

Yu Avksentiev, S., and A. K. Nikolaev. "Influence of Rheology on Pressure Losses in Hydrotransport System of Polymetallic Ores Tailings." IOP Conference Series: Earth and Environmental Science 87, no. 5 (October 2017): 052019. http://dx.doi.org/10.1088/1755-1315/87/5/052019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Teryekhin, E. P., and I. S. Bulgakov. "Development of hydrotransport for chalk-and-clay slurry in wet process of cement manufacture." Mining Informational and Analytical Bulletin 10 (2018): 163–68. http://dx.doi.org/10.25018/0236-1493-2018-10-0-163-168.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Alexandrov, Victor I., Alexandra V. Kopteva, and Sergey L. Serzan. "Effective Parameters of Tail Processing of Gold-Bearing Ore Hydrotransport for Verninskaya Processing Factory." Key Engineering Materials 836 (March 2020): 25–35. http://dx.doi.org/10.4028/www.scientific.net/kem.836.25.

Full text

Abstract:

The article is devoted to the analysis of the composition and properties of the materials and liquids during transportation using pipeline and shows that in order to increase the efficiency of hydraulic transport systems in mining a transition to the transportation of slurries with a high concentration of solids in the slurry flow is necessary. Experimental studies have shown that slurry tailings of gold-containing ore with mass concentrations of more than 55 % are viscoplastic fluids. Experiments on a rotational viscometer allowed us to establish the main rheological characteristics of the studied slurries – shear stress and the dynamic effective viscosity. It has been established that over the entire range of concentrations from 55 to 65 %, the flow of slurries is described by the Bingham rheological equation. Experimental studies of hydraulic transport performed on a laboratory setup with a pipeline diameter of 50 mm confirmed the results obtained on a rotational viscometer. The curved of mixture stream is inclined straight lines that are cut off on the axis of the head in the sections, which determine the initial hydraulic slope corresponding to the yield shear stress on the rheological curves. According to the results of the experiments, a method has been developed for calculating the hydraulic transport of high concentrated slurries of tailings of gold-bearing ore. Calculations showed that in a given range the performance of the hydrotransport system and the mass concentration of the solid phase pressure losses vary from 11 to 84 m of water column/m. Head loss values increase with the increasing concentration. A sharp increase in the head loss occurs in the concentration range from 60 to 65 % and higher.

APA, Harvard, Vancouver, ISO, and other styles

32

Aleksandrov, V. I., M. A. Vasilyeva, and I. B. Pomeranets. "Estimation of efficiency of hydrotransport pipelines polyurethane coating application in comparison with steel pipelines." IOP Conference Series: Earth and Environmental Science 87 (October 2017): 022001. http://dx.doi.org/10.1088/1755-1315/87/2/022001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

ALEXANDROV, Victor I., Pavel N. MAHARATKIN, and Inna S. TRUFANOVA. "EFFECTIVE PARAMETERS OF TAIL PROCESSING GOLD-BEARING 2 ORE HYDROTRANSPORT FOR VERNINSKAYA PROCESSING 3 FACTORY." Scientific Papers of Silesian University of Technology. Organization and Management Series 2020, no. 145 (2020): 9–21. http://dx.doi.org/10.29119/1641-3466.2020.145.1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Vasil'eva, Mariya. "Experimental determination of consumables-pressure characteristics of ground pumps in iron ore beneficiation tailings hydrotransport." Вестник Пермского национального исследовательского политехнического университета. Геология. Нефтегазовое и горное дело 12, no. 6 (2013): 111–19. http://dx.doi.org/10.15593/2224-9923/2013.6.12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Albion, Katherine, Lauren Briens, Cedric Briens, Franco Berruti, and Steven McDougall. "Detection of oversized material in a hydrotransport slurry pipe using a non-invasive acoustic method." Powder Technology 190, no. 3 (March 2009): 361–71. http://dx.doi.org/10.1016/j.powtec.2008.08.020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Albion, K., L. Briens, C. Briens, and F. Berruti. "Modelling of oversized material flow through a horizontal hydrotransport slurry pipe to optimize its acoustic detection." Powder Technology 194, no. 1-2 (August 2009): 18–32. http://dx.doi.org/10.1016/j.powtec.2009.03.017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Zych, Marcin, Robert Hanus, Leszek Petryka, Dariusz Świsulski, Anna Strzępowicz, and Piotr Zych. "Application of gamma densitometry and statistical signal analysis to gas phase velocity measurements in pipeline hydrotransport." EPJ Web of Conferences 92 (2015): 02122. http://dx.doi.org/10.1051/epjconf/20159202122.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Popczyk, Marcin. "Perspective directions of the development of hydrotransport gravity mixers installations in the light of existing industrial solutions." IOP Conference Series: Earth and Environmental Science 174 (July 2018): 012012. http://dx.doi.org/10.1088/1755-1315/174/1/012012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Makharadze, Leon. "Free combined air – as an effective remedy for water hammers attenuation in the pressure head hydrotransport systems." Works of Georgian Technical University, no. 3(513) (October 26, 2019): 78–85. http://dx.doi.org/10.36073/1512-0996-2019-3-78-85.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Fatehi, Farzad, Yevhen Semenenko, Olha Medvedieva, Larysa Tatarko, and Olexander Haminich. "Argumentation for critical parameters and operating modes in the process of underwater mining of placers." E3S Web of Conferences 168 (2020): 00043. http://dx.doi.org/10.1051/e3sconf/202016800043.

Full text

Abstract:

The purpose of the article is to study the connection between the parameters of the formation of the suction funnel, such as the scattering speed and concentration of the suction mixture, and the concentration of the slurry in the suction pipe, which provides supercritical flow conditions. This connection is considered in terms of the most common process of underwater mining of placers for the open mining technology by suction dredger. The importance of the research is conditioned by the well-known but not yet thoroughly studied phenomenon of a decrease in the performance of the dredger pump on solid material without breaking the vacuum, which in most cases leads to a hydraulic shock in the pressure line. It is argued that the cause of this occurrence is the onset of a critical flow regime in the suction pipe due to inconsistency of the parameters of the hydrotransport modes and suction funnel formation. A combined analysis of the known dependences for the critical rate of hydro transportation in an inclined pipeline and for the geometric parameters of the suction funnel made it possible to establish restrictions on the concentration of solid particles on the surface of the erosion funnel.

APA, Harvard, Vancouver, ISO, and other styles

41

Medvedieva, Olha, Yevhen Semenenko, Borys Blyuss, and Viktor Skosyriev. "Justification of the hydro-mechanical systems operating modes, used for restoring accumulation capacity of tailings storages." IOP Conference Series: Earth and Environmental Science 970, no. 1 (January 1, 2022): 012043. http://dx.doi.org/10.1088/1755-1315/970/1/012043.

Full text

Abstract:

Abstract The paper describes the ways to extend the service life of tailings storage facilities by restoring their accumulation capacity. Analysis of the state-of-the-art experience in tailings management is provided. Restoring is carried out due to the following: storing of waste as paste-like slurry; raising embankment; intensifying wastewater treatment process in ponds by means of coagulation agents; selection of adequate alluviation maps mode; specifying parameters of surface and underwater alluvial beaches; implementing the separate storage of solid-phase fractions; preliminary pulp clarification in alluviation maps before supplying it to the pond. Due to the long length of the hydrotransport lines, the use of paste thickeners in the mining and processing plants of Kryvbas is impossible. These technologies are implemented at new storage facilities where waste is placed in the first tier. The aim of this study is to determine and substantiate parameters of hydro-mechanical systems during the operation of tailing facilities with temporary clarifiers. The study for the first time established relationship between the temporary pond operation time. There are such parameters as concentration and consumption of slurry, initial depth of the pond filling, barrier dam height and the length of alluvial front.

APA, Harvard, Vancouver, ISO, and other styles

42

A.M., Beklemishev, and Budyukov Yu.E. "Improving the efficiency of diamond drilling with core hydrotransport by reducing the specific energy consumption at the bottom of the well." Mining Informational and analytical bulletin 12, no. 53 (2018): 3–14. http://dx.doi.org/10.25018/0236-1493-2018-12-53-3-14.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Makharadze, Leon. "Technological scheme of a multistage hydrotransport facility for transportation of fossils and other solid loose materials by pipelines at far distances." Works of Georgian Technical University, no. 3(517) (September 29, 2020): 95–103. http://dx.doi.org/10.36073/1512-0996-2020-3-95-103.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Semenenko, Ye V., O. O. Medvedeva, S. M. Kyrychko, and N. A. Nikiforova. "The calculation of parameters and modes of hydrotransport in the development of man-made deposits in the storage of waste products." Geo-Technical mechanics, no. 142 (2018): 91–102. http://dx.doi.org/10.15407/geotm2018.142.091.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Ilhamov, Kh Sh, A. M. Arifjanov, D. Z. Narzullaev, B. A. Abdurakhmanov, and K. K. Shadmanov. "Determination of the formation model of the phase concentration field along the section of the turbulent flow of hydrotransport using information technologies." Journal of Physics: Conference Series 2001, no. 1 (August 1, 2021): 012010. http://dx.doi.org/10.1088/1742-6596/2001/1/012010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Golik, V. I., Yu V. Dmitrak, Yu I. Razorenov, S. A. Maslennikov, and V. I. Lyashenko. "Mechanochemical technology of iron extraction from enrichment tailings." Izvestiya. Ferrous Metallurgy 64, no. 4 (June 4, 2021): 282–91. http://dx.doi.org/10.17073/0368-0797-2021-4-282-291.

Full text

Abstract:

The article describes the results of studies on ore dressing waste processing at the enterprises of the Kursk Magnetic Anomaly with production of metals and building materials. About 1.8 billion tons of tailings were stored there. Significant feature of deposits formation is division of tailings by size and specific gravity in water stream, since tailings are transported from the enrichment plant to the tailing dams by hydrotransport. Characteristics of the tailings from wet magnetic research method was applied, including system analysis and scientific generalization, data processing using methods of statistics, probability theory and mathematical modeling. The authors have systematized the results of tailings leaching of following types: agitation leaching in percolator, agitation leaching after activation in disintegrator in the dry state and reagent leaching in disintegrator. Regression analysis of experimental data have been carried out, on the basis of which graphs of dependence of iron extraction on the values of variable process factors were constructed. The used enrichment technologies are limited by extraction limit, which results in processing tailings. The use of these tailings by traditional technologies is not economically efficient, and upgrading of enrichment processes is advisable using hydrometallurgical and chemical technologies. Promising direction in metals extraction from mining waste is combination of processing technologies based on possibilities of both chemical enrichment and activation in disintegrator. It was determined that mechanochemical activation of tailings in disintegrator simultaneously with leaching can significantly increase extraction while the processing time is reduced hundredfold. Recommended technology may be in demand at mining enterprises with the prospect of transition to underground mining.

APA, Harvard, Vancouver, ISO, and other styles

47

Асадуллин, Наиль, and Nail Asadullin. "CLASSIFICATION OF FODDER MASSES APPLIED TO ITS HYDRO-MECHANICS." Vestnik of Kazan State Agrarian University 13, no. 2 (August 6, 2018): 71–75. http://dx.doi.org/10.12737/article_5b35058f6bef38.44028308.

Full text

Abstract:

The current stage in the development of agricultural production in livestock is characterized by the extensive use of pipeline transport to move the forage masses, which are related to non-Newtonian fluids. Production experience and scientific work on the study of hydrotransport systems showed that this method of transportation is the most economical and promising, it has high reliability of structural elements, improves sanitary and hygienic working conditions and makes it possible to fully automate the transportation process. The complex nature of the transportation of mixtures has not allowed to create a unified theory of hydrodynamic calculation of their parameters to date, therefore, various models are used for theoretical investigation of the nature of motion. To select a particular model, it is always important to correctly classify viscous semiliquid media with respect to hydrodynamics. Therefore, the article did not set out the specific goal of choosing a method for studying non-Newtonian systems, but solved the problem of their classification by known defining characteristics. The proposed classification does not pretend to be exhaustive in terms of the physical and chemical nature of the fluid, especially their combinations, but it covers almost all the anomalous phenomena that occur in the fluid during its transportation and helps to select a quantitative method for calculating the transporting fluid. The classification of non-Newtonian fluids with respect to their hydromechanics is based on the dependence of the shear stress on the shear gradient. For this dependence, each type of liquid is considered. The developed classification scheme further promotes a more complete account of the rheological properties of high-viscosity liquids during their transportation through pipes and facilitates the development of quantitative calculation methods.

APA, Harvard, Vancouver, ISO, and other styles

48

Tytiuk, V., D. Mikhieiev, S. Tolmachov, and O. Danyleiko. "APPLICATION OF THE GENERALIZED ELECTROMECHANICAL CONVERTER THEORY TO ANALYSIS OF THE STATIC CHARACTERISTICS OF AN INDUCTION MOTOR." Electromechanical and energy saving systems 4, no. 56 (December 2021): 25–33. http://dx.doi.org/10.30929/2072-2052.2021.4.56.25-33.

Full text

Abstract:

Purpose. The work is devoted to the development of a closed-loop control system of hydraulic transport system with pressure stabilization and its research on a mathematical model. Originality. The expediency of application of a closed-loop control system of electric water transport system with pressure stabilization as the most promising way of resource saving in the operation of pumping complexes is substantiated. The realization of the closed-loop pressure stabilization system using a discrete program regulator is proposed. The studies of parametric sensitivity of the closedloop pressure stabilization system have confirmed the high robustness of the proposed solution. Methodology. General methods of physics, hydraulics, mathematical analysis and computational mathematics were used to solve the tasks. Numerical solution of mathematical model equations and visualization of obtained results were performed in MATLAB®/Simulink environment. Results. The expediency of using closed-loop control systems of pumping units with pressure stabilization as the most promising way of resource saving in the operation of pumping complexes is substantiated. The impossibility of implementing the pressure stabilization system based on the classical PID controller is shown, which is caused by the influence of wave processes in the pipeline system with distributed parameters. The closed-loop pressure stabilization system with the use of a discrete program regulator is realized, its stability and robustness in a wide range of changes in the regulator parameters is shown. Practical value. The possibility of implementing a closed-loop pressure stabilization system of electric hydrotransport system has been substantiated; a method of calculating the discrete program pressure regulator based on the regression analysis of the results of mathematical modeling has been proposed. Figures 12, tables 2, references 9.

APA, Harvard, Vancouver, ISO, and other styles

49

Lu, Qingqing, Zhengfu Bian, and Noriyoshi Tsuchiya. "Hydrotransport-Oriented Zn, Cu, and Pb Behavior Assessment and Source Identification in the River Network of a Historically Mined Area in the Hokuroku Basin, Northeast Japan." International Journal of Environmental Research and Public Health 16, no. 20 (October 15, 2019): 3907. http://dx.doi.org/10.3390/ijerph16203907.

Full text

Abstract:

Aquatic ecosystems continuously receive potentially hazardous heavy metals from natural and anthropogenic sources. Focusing on the origin of heavy metals, this study aims to estimate the load contribution of tributaries from individual watershed and human drainage and to dissect the source of heavy metals, as commonly required for environmental impact assessment. Using integrated water dynamics, Geographic Information System (GIS), and chemical analysis, we identified and evaluated the heavy metal sources of the Kosaka river system in Hokuroku basin, which is a historically mined area in Northeast Japan, both in the high-water and low-water seasons. The migration and diffusion behaviors of heavy metals along with hydro-transport were analyzed, and the effects of mining activities on regional water quality both in the high-water and low-water seasons were clarified. The results indicate that Zn pollution was obvious in the Kosaka River network, especially in the downstream area. The spatial heterogeneity of heavy metal outflows from tributary watersheds was obvious, and the variations had strong correlations with mine site locations. The heavy metal flows in the mainstream increased sharply in the vicinity downstream of the Kosaka refinery drainage outlets. Compared to the low-water season, the influences of human drainage were slighter in high-water season, with lower contribution rates due to the dilution effect of the greater water discharge. Downscale sampling is effective to identify pollutant sources in regional basins.

APA, Harvard, Vancouver, ISO, and other styles

50

Semenenko, Ye V., S. I. Kril, and L. G. Tatarko. "Calculation of the parameters of the hydraulic transport of enrichment waste in polyethylene pipes." Geo-Technical mechanics, no. 152 (2020): 285–97. http://dx.doi.org/10.15407/geotm2020.152.285.

Full text

Abstract:

In the article, a new method is presented for calculating hydraulic slope and critical speed of cleaning reject hydrotransportation through the polyethylene pipelines, which is based on the Methodology for Calculating Hydrotransport Plants for Tailings Transporting and Inwashing at the Iron Ore Mining and Processing Enterprises. This methodology was approved by the State Construction Committee of the Ukrainian SSR in its Temporary Instructions on Technology of the Tailing Dump Arrangement and was used in the design of all of the waste storage facilities in the Krivyy Rih ore-dressing and processing enterprises. For the conditions of the experiments, it was shown that experimental multiplier in the formula for calculating critical speed of hydrotransportation was depended on the pipeline diameter, free fall acceleration, kinematic coefficient of water viscosity and absolute roughness of the pipe inner surface. The acknowledgement of these factors made an empirical constant in the considered formula dimensionless and close to average value of the constants in the formulas obtained by other similar methods. With the considered method, it is proved that experimental constant in the formula for calculating critical speed of hydrotransportation is inversely proportional to the cubic root of the roughness of the pipeline inner surface, while coefficient of proportionality is a universal constant, which does not depend on the properties of the pipeline material and is equal to 10.1. Therefore, for determining critical speed of hydrotransportation through the polymer pipes by using this method, it is necessary to multiply critical speed for steel pipe with a similar diameter by the cubic root of ratio of roughness of the inner surfaces of the steel and polymer pipelines. It is further shown that value of hydraulic slope significantly depends on the operating coefficient, which shows by how many times coefficient of friction hydraulic resistance in the polyethylene pipe operating in supercritical flow regime exceeds the same value in case of critical flow regime for the same pipe. The research results allowed finding formulas for calculating hydraulic slope and critical speed of the iron-ore cleaning reject hydrotransportation through the polyethylene pipelines, which are based on the dependencies obtained for the steel pipes and value of absolute roughness of the pipeline inner surface.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!