Publication detail

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

DVOŘÁK, K. MACHÁČKOVÁ, A. RAVASZOVÁ, S. GAZDIČ, D.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

disintegrator; microscopy; wear; high energy milling; cement

Authors

DVOŘÁK, K.; MACHÁČKOVÁ, A.; RAVASZOVÁ, S.; GAZDIČ, D.

Released

13. 5. 2020

Publisher

MDPI

Location

Švýcarsko

ISBN

1996-1944

Periodical

Materials

Year of study

13

Number

10

State

Swiss Confederation

Pages from

10

Pages to

22

Pages count

12

URL

https://www.mdpi.com/1996-1944/13/10/2234

Full text in the Digital Library

http://hdl.handle.net/11012/193399

BibTex

@article{BUT163965,
  author="Karel {Dvořák} and Adéla {Macháčková} and Simona {Ravaszová} and Dominik {Gazdič}",
  title="Effect of Imposed Shear Strain on Steel Ring Surfaces during Milling in High‐Speed Disintegrator",
  journal="Materials",
  year="2020",
  volume="13",
  number="10",
  pages="10--22",
  doi="10.3390/ma13102234",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/13/10/2234"
}