The Shear Test of Iron Ore Pellets during Reduction at an Elevated Temperature

A key in design and operation of the direct reduction shaft furnace is to prevent iron ore pellets from clustering. A new rotating type shear tester was developed to measure the shear strength of the pellets during reduction and to relate it to the flow condition. The size of the cell is 144mm O. D....

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Bibliographic Details
Published inFuntai Kogakkaishi Vol. 26; no. 9; pp. 672 - 677
Main Authors MIZUKAMI, Shunichi, MATSUKURA, Masakazu, MURATA, Hiroyuki
Format Journal Article
LanguageEnglish
Published The Society of Powder Technology, Japan 1989
Subjects
Flowability
Iron Ore Pellets
Ring Cell
Shaft Furnace
Shear Test
Yield Strength
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Summary:A key in design and operation of the direct reduction shaft furnace is to prevent iron ore pellets from clustering. A new rotating type shear tester was developed to measure the shear strength of the pellets during reduction and to relate it to the flow condition. The size of the cell is 144mm O. D. and 80mm I. D., and the pellets in the cell are reduced by using CO gas at the temperature elevated to 980°C. The maximum load on the cell is 3.40kN for consolidation and 0.86kN during shear. The measured shear strength of the reduced pellets was from 40 to 70kPa, and it was decreased approximately to half by shearing continuously during reduction.
ISSN:0386-6157
1883-7239
DOI:10.4164/sptj.26.672