The results of experimental studies of influence of variable parameters on the performance indicators of shock-centrifugal disintegrator

Nadutyy, V.P.; Haddad, Jamil; Sukharyev, V.V.; Loginova, Anastasia

doi:10.29202/nvngu/2019-1/3

Cited by 5 publications

(4 citation statements)

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“…The quasi-two-dimensional model, allowing to determine the stresses distribution on all volume of the disintegrators flat working zone, is created based on the set of linear finite elements. Simple linear model, consisted only from equation (5) without equation (11), is insufficient because of the following. On the one hand, the errors of piecewise linear approximation of stresses on the working surfaces can be compensated by decrease of the integration step.…”

Section: Resultsmentioning

confidence: 99%

“…In this case, the maximum lump size is up to several times less than the gap between working surfaces [4]. This disintegration method leads to the process energy consumption reduce because of the grains destruction by shift forces, including the selective crushing along the minerals cleavage planes [5]. But, the main part of the grains relative movement directions in a loose material is influenced by its stressed condition [6], unlike destruction of the monolithic rock massif, where the directions of shift planes coincide often with the defect space orientation directions [7].…”

Section: Introductionmentioning

confidence: 99%

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Modelling of mined rock thin layer disintegration taking into consideration its properties changing during compaction

2019

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The aim of the work is modelling of stressed condition of the loose mined rock thin layer between two parallel working plates of disintegrator, taking into consideration the dependences of the layer porosity and its side thrust coefficient on the main stress value with hereditary model of deformation accumulation. The equation of extreme balance of mined rock compactable thin layer is obtained for the case of its compression with partial sliding on working surfaces. It is shown, that there is no sliding in the central area of deformed zone, unlike the peripheral area. The iterative algorithm for parameters calculation of the layer stressed condition for the hypothesis of symmetric parabolic distribution of the axial normal stresses in the directions being perpendicular to the plates is developed. The distributions of the side thrust coefficient in the layer, the effective coefficient of external friction and the stresses of disintegrators working surfaces are grounded. The practical value of the research is the possibility to determine precisely the contact forces while crushing of fine-grained material taking into consideration its compactibility.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling of mined rock thin layer disintegration taking into consideration its properties changing during compaction

2019

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“…The need to restore and modernize all branches of the industry of Ukraine puts forward serious tasks for metallurgists and machine builders related to increasing the reliability and durability of machine parts and technological equipment [1][2][3]. Premature failure of individual parts and components caused by breakdowns or wear limits the duration of normal equipment operation causes an increase in the production of spare parts, an increase in transport costs and sharply reduces production efficiency [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The durability increasing of high-wear cast parts of mining and processing equipment

Shalomeev,

Brykov,

Sheiko

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The analysis of the operation of rapidly wearing parts of the ore-grinding equipment was carried out. It has been established that unloading grates and ladles are fast-wearing parts of layered fracture mills and determine their downtime between repairs. The possibility of improving the mechanical properties of medium-carbon steel 40HL due to the reduction of harmful impurities is shown. The effects of modification with aluminum, vanadium, calcium, and rare earth metals on structural formation, mechanical, and operational properties of steel are investigated. It was established that the complex modification of cast steel 40HL (0.04…0.1% vanadium, 0.15% silicon calcium and 0.15% rare earth metals) allows to significantly increase its mechanical properties and wear resistance. The separate and joint influence of aluminum, vanadium, calcium and rare metals on the austenite grain size and hardening of steel was studied. The proposed modification technology makes it possible to obtain a fine grain, through-hardening of castings and ensure reliable and long-lasting operation of ball mills.

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“…Several parameters were investigated in a shock centrifugal disintegrator comparing single and two chamber performances, where the rotor speed was considered in addition to input material size and type [6]. Experimental work using the new vibrating mill design has been conducted to study the impact of several variables, including motor speed and initial material size [7].…”

Section: Introductionmentioning

confidence: 99%

Investigation of vibrating jaw crusher experimental variables

Haddad,

Alfaqs,

Al-quraan

et al. 2023

Min. miner. depos.

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Purpose. Current research focuses on studying experimentally various parameters affecting the particle size produced in a vibrating jaw crusher developed and implemented at Al-Balqa Applied University. The main purpose is to find the optimal conditions at which the jaw crusher under study works. Methods. The jaw crusher angle and rotating mass type are considered to study all particle sizes and reduction ratios obtained for three different motor operation speeds: 1500, 2000, and 2500 rpm. Coarse aggregate weighing 900 g with 26 mm particle size is fed into the jaw crusher, which produces several particle sizes (19, 12.5, 9.5, 4.75, and less than 4.75 mm). Furthermore, the mass of the particles is measured and the particle size reduction is calculated. Findings. It has been found that the jaw crusher angle, rotating mass type, and the motor operation speed play an important role in both reducing the amount of mass and reducing the size of each particle produced. In addition, it has been determined that operation at a speed of 2000 rpm provides a significant change in both mass and size reduction of each particle size considered. Originality. The originality of this research lies in its experimental investigation of the effects of various parameters on particle size reduction in a vibrating jaw crusher, as well as in the introduction of a new design that uses one motor to drive two plates operating at different speeds and in opposite directions. Practical implications. The findings can be used to optimize the design and operation of jaw crushers in various industries, including metallurgical, quarry, and mining industries, where these crushers are widely used. The results of this study can also serve as a basis for future research on particle size reduction in other types of crushers and milling equipment.

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The results of experimental studies of influence of variable parameters on the performance indicators of shock-centrifugal disintegrator

Cited by 5 publications

References 0 publications

Modelling of mined rock thin layer disintegration taking into consideration its properties changing during compaction

Modelling of mined rock thin layer disintegration taking into consideration its properties changing during compaction

The durability increasing of high-wear cast parts of mining and processing equipment

Investigation of vibrating jaw crusher experimental variables

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