Selection of rational surface configuration For roller press tires

Baiul, K. V.; Solodka, Nataliia; Khudyakov, A. Yu.; Ващенко, С. В.

doi:10.1007/s11106-020-00133-w

Cited by 11 publications

(8 citation statements)

References 5 publications

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“…A standard roller press design usually contains the following subassemblies: drive system, working rollers cage, roller support system, and compaction unit. The compaction unit is a particularly important unit among the systems for pressurized agglomeration [ 54 , 61 , 66 ]. A very important element of a properly conducted agglomeration is effective preparation of the material and its dosing [ 67 , 68 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Temperature Distribution on the Surface of Saddle-Shaped Briquettes Consolidated in the Roller Press

Bembenek

Uhryński

2021

Materials

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The unit pressure in the fine-grained material consolidation process in the roller press can reach over hundred MPa and is a parameter which results, among other things, from the properties of the consolidated material and the compaction unit geometry. Its value changes depending on the place on the molding surface. Generating different pressure on the surface of briquettes makes their compaction different. One’s own and other researchers’ experience shows that, in the case of exerting high pressure on the merged fine-grained material, the higher unit pressure exerted on the material, the higher temperature of the consolidated material is. The temperature distribution on the surface of the briquettes can testify the locally exerted pressure on the briquette. The stress distribution in the briquetting material is still a subject of research. The article includes thermography studies of the briquetting process of four material mixtures. Thermal images of briquettes were taken immediately after they left the compaction zone as well as forming rollers. The obtained thermograms and temperature variability at characteristic points of the surface of briquettes were analyzed. The correlation between the temperature distribution and the stress distribution in the briquettes was determined.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Temperature Distribution on the Surface of Saddle-Shaped Briquettes Consolidated in the Roller Press

Bembenek

Uhryński

2021

Materials

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“…It consists of putting the material under pressure, causing the grains to be closer to one another, and forming diverse bonds to make the material stronger [ 18 ]. A very important element of a properly conducted agglomeration is effective preparation of the material [ 11 , 13 , 19 ] and its dosing [ 17 , 20 , 21 ]. The pressurized agglomeration process produces compact shapes with relatively low porosity and specific mechanical strength [ 6 , 12 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…The compaction unit is a particularly important unit among the systems for pressurized agglomeration [ 8 , 15 , 21 ], which is where the production of the agglomerate takes place. It is also the weakest link in a briquetting machine’s structure.…”

Section: Introductionmentioning

confidence: 99%

“…These stresses reach their peak when the opposite thresholds of both rollers, in the roller press, come into contact [ 15 , 16 ]. This negative phenomenon is limited by the consecutive rows of cavities being alternately arranged on the roller surface [ 21 , 26 ]. Such arrangement makes it possible to minimize the areas of dead fields which form thresholds and nodes.…”

Section: Introductionmentioning

confidence: 99%

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The Wear on Roller Press Rollers Made of 20Cr4/1.7027 Steel under Conditions of Copper Concentrate Briquetting

2020

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This paper defines the wear process of rollers made of 20Cr4. Rollers with a diameter of 1000 mm were installed in a roller press used for the production of drop-shaped briquettes and the copper concentrate was briquetted for 1100 h. Three-dimensional (3D) geometry analysis, metallographic analysis, macroscopy, scanning electron microscopy, as well as hardness measurements were performed. It was observed that the working surface was non-uniformly worn. The smallest wear affects the molding cavities situated on the outermost edges of the ring. The wear increases as the center of the ring is approximated, and it reaches its maximum at the middle of the ring. The molding cavities also wear asymmetrically. For the shape considered in this study, the lower part of a cavity is subject to a higher wear rate. We found that the material of the working ring was carburized, but its hardness was significantly lower than required. The roller ring microstructure changes depended on the distance from the cavity’s face. An investigation of the wear mechanisms showed different types of abrasive wear, corrosive processes, and plastic deformation. The exact type and course of wear were described, depending on the location on the working surface.

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“…Working rollers cages are built of frames with various design solutions. The briquette forming process takes place between two rollers which rotate in mutually opposite directions and on the surfaces of which there are moulding cavities distributed in a proper way [13]. These are semi-moulds between which material supplied from a hopper is moulded into briquettes.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

Bembenek

2020

Polymers

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When considering the operation of roller presses for the consolidation of fine-grained materials, the main problems are disturbances in the proper flow of the material and its bridging in gravity feeders. This is especially true for small and medium capacity presses, where the hoppers for dosing the material are narrow. This article presents innovative laboratory tests of the impact of using a polymer plate lining in the gravity feeder of a roller press. Polymer materials Polyacetal C (POM C) and Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) were used for the tests. The influence of the use of plates on the material flow and quality of briquettes was investigated in comparison with the case where such plates were not used. The research showed an improvement in the flow of fine-grained materials in the feeder and an increase of the briquette strength indexes, as compared to those cases when polymer linings were not used in the feeder.

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Selection of rational surface configuration For roller press tires

Cited by 11 publications

References 5 publications

Analysis of the Temperature Distribution on the Surface of Saddle-Shaped Briquettes Consolidated in the Roller Press

Analysis of the Temperature Distribution on the Surface of Saddle-Shaped Briquettes Consolidated in the Roller Press

The Wear on Roller Press Rollers Made of 20Cr4/1.7027 Steel under Conditions of Copper Concentrate Briquetting

The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

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