鉄鉱石の破砕における破砕荷重速度と破砕産物の粒度分布

概要

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The relation between the size distribution of crushed product and the rate of loading for iron ore crushing was studied. From the crushing tests in which the compression length and the compressing time for each compression length were kept constant, it was confirmed that the amounts of fine particles of the crushed product increased remarkably with the increase of the rate of loading. The breaking strength and the apparent YOUNG's modulus of the glass and the iron ores were measured. The breaking strength and the apparent YOUNG's modulus of the glass and the iron ores markedly increased as the rate of loading increased. The relationship between the rate of loading and the breaking strength was proposed by the PLANDTL's equation. It was considered that the changes in the dynamical behaviors of the ores with the variation of the rate of loading closely relate to the production of fine particles of the crushed product. Thus, the rate of loading is one of the most important factors which have a great influence on the size distribution of the crushed product of iron ores.
社団法人日本鉄鋼協会の論文
1969-05-01