English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

An equation for the rate of reduction of a hematite pellet has been derived on the basis of the unreacted-core shrinking model by introducing the resistance due to the rate of gas flow. T he estimating jJrocedures of the viscosi(y and the dijJusion coefficients or the equilibrium constallt are then discussed standing on the fact that the equation gave a close agreement with the experimental values. I n consideration of the above-mentioned equation and the experimmtai data obtained by T akahashi, et ai. 0 1' by Feinman, et al. , the calculation has been made after the method proposed by Yagi and Ono. Quite reasonable values were obtained for the chemical reaction rate constants and the e.!Jective dijJusion codficients through the porous shell of a reduced pellet . On the other hand, the calculation based on a reduction rate equation without considering the resistance due to the rate of gas flow did not give satisfactory results . The results obtained clearly indicate that the introduction of this resistance is rather important.

On the Unreacted-core Shrinking Model for Reduction of a Single Hematite Pellet with Hydrogen