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Abstract <p>The influence of changeability of dry magnetic separation feed characteristics on the separation process efficiency is considered at the fixed operation modes of equipment is examined as a case-study of the Olenegorsk deposit ore. It is found that the major effect is exerted by the content of total iron: its increase in the feed is independent of the maximum linear size in the size grade and of the size modulus, and is accompanied with Fe<sub>tot</sub>&#xa0;content growth in the magnetic fraction. The results of dry magnetic separation of a narrow particle size range prove that for&#xa0;<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(-80+2\)</EquationSource> </InlineEquation>&#xa0;mm, the correlation of Fe<sub>tot</sub>&#xa0;content of the magnetic fraction (at&#xa0;<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(B=0.16\)</EquationSource> </InlineEquation>&#xa0;T) has a high approximation coefficient of 0.9461, which is reflective of a weak contribution of the feed size to separation efficiency. Regarding influence exerted on separation performance by the size modulus, it is found that the absence of ore pretreatment by sifting ensures reduction in loss of Fe<sub>tot</sub>&#xa0;with the nonmagnetic fraction in 70% of cases.</p>

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Experimental Validation of Influence Exerted by Characteristics of Dry Magnetic Separation Feed on the Process Efficiency

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • D. N. Shibaeva,
  • D. A. Asanovich,
  • A. A. Kompanchenko

摘要

Abstract

The influence of changeability of dry magnetic separation feed characteristics on the separation process efficiency is considered at the fixed operation modes of equipment is examined as a case-study of the Olenegorsk deposit ore. It is found that the major effect is exerted by the content of total iron: its increase in the feed is independent of the maximum linear size in the size grade and of the size modulus, and is accompanied with Fetot content growth in the magnetic fraction. The results of dry magnetic separation of a narrow particle size range prove that for  \(-80+2\)  mm, the correlation of Fetot content of the magnetic fraction (at  \(B=0.16\)  T) has a high approximation coefficient of 0.9461, which is reflective of a weak contribution of the feed size to separation efficiency. Regarding influence exerted on separation performance by the size modulus, it is found that the absence of ore pretreatment by sifting ensures reduction in loss of Fetot with the nonmagnetic fraction in 70% of cases.