Effect of Imposed Shear Strain on Steel Ring Surfaces during Milling in High‐Speed Disintegrator

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU136466" target="_blank" >RIV/00216305:26110/20:PU136466 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/1996-1944/13/10/2234" target="_blank" >https://www.mdpi.com/1996-1944/13/10/2234</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/ma13102234" target="_blank" >10.3390/ma13102234</a>

Result language
angličtina
Original language name
Effect of Imposed Shear Strain on Steel Ring Surfaces during Milling in High‐Speed Disintegrator
Original language description
This contribution characterizes the performance of a DESI 11 high‐speed disintegrator working on the principle of a pin mill with two opposite counter‐rotating rotors. As the ground material, batches of Portland cement featuring 6–7 Mohs scale hardness and containing relatively hard and abrasive compounds with the specific surface areas ranging from 200 to 500 m2/kg, with the step of 50 m2/kg, were used. The character of the ground particles was assessed via scanning electron microscopy and measurement of the absolute/relative increase in their specific surface areas. Detailed characterization of the rotors was performed via recording the thermal imprints, evaluating their wear by 3D optical microscopy, and measuring rotor weight loss after the grinding of constant amounts of cement. The results showed that coarse particles are ground by impacting the front faces of the pins, while finer particles are primarily milled via mutual collisions. Therefore, the coarse particles cause higher abrasion and wear on the rotor pins; after the milling of 20 kg of the 200 m2/kg cement sample, the wear of the rotor reached up to 5% of its original mass and the pins were severely damaged.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering

Project
<a href="/en/project/GA20-00676S" target="_blank" >GA20-00676S: Effects of mechano-chemical activation on the process of formation, structure and stability of selected clinker minerals</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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