Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

An analysis of the influence of grinding aids on the breakage process of calcite in media mills

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Advanced Powder Technology

The effectiveness of calcium stearate, boric acid, and silica as additives for the fine grinding of calcite in media mills, i.e. ball, rod, and vibration mills, were explored, by following the size distribution of the ground product collected at various time intervals from 15 s of grinding up to 30 min, using a single size feed. While calcium stearate could achieve a modified grinding rate factor of 1.5 in the ball mill and had indicated an optimum concentration for maximum performance, both boric acid and silica remained inert materials without indicating any influence. It was also found that the presence of calcium stearate during the initial stages of grinding introduced a retardation effect on the grinding process, with the product being coarser in comparison with the blank sample. To overcome this retardation effect for the breakage process induced by the additive, it was found preferable to delay the introduction of the additive by around 5 min. Analysis of the breakage process was carried out by estimating the breakage parameters using the G-H solution for the size-discretized batch grinding equation. It was found that while the additive reduced the breakage rates of coarser size fractions during the retardation period, it helped to significantly increase the breakage rates of finer particles during the finer stages of grinding. The higher breakage rates at finer stages of grinding and the reduced agglomeration observed during this period indicate the acceptability of the alterations in the flow behavior of the mill charge as the possible mechanism for the additive in media milling.

Affiliations: 1: Powder Technology Division, Microfines, 72 Pondy Bazaar, T. Nagar, Madras 600 017, India; 2: Department of Chemical Engineering, Indian Institute of Technology, Madras 600 036, India


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Advanced Powder Technology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation