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Abstract <p>The energy parameters of plasma-arc reduction melting of quartz-leucoxene concentrate, which is a promising raw material for the Russian titanium industry, are studied. Melting is intended for refining the concentrate from silicon to produce synthetic rutile. Refining is based on the reduction of SiO<sub>2</sub> to SiO with evaporation of the latter from the smelt. Melting was carried out at atmospheric pressure in a laboratory DC plasma-arc furnace with a graphite electrode and crucible. On the current–voltage parameters, the electrical resistance of the bath was determined. It is shown that feeding the concentrate to the bath leads to an increase in the power released in the bath. The increase in power occurs as a result of Lenz–Joule heating due to an increase in the resistance of the bath owing to the presence of a solid phase in it. The power of Lenz–Joule heat release reached 70% of the arc heating power and compensated for the energy costs for melting and thermochemical treatment of the concentrate.</p>

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Influence of Feed of the Processed Material into the Plasma Furnace Bath on the Energy Parameters of Reduction Smelting of Quartz-Leucoxene Concentrate

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • A. A. Nikolaev,
  • D. E. Kirpichyov,
  • A. V. Nikolaev

摘要

Abstract

The energy parameters of plasma-arc reduction melting of quartz-leucoxene concentrate, which is a promising raw material for the Russian titanium industry, are studied. Melting is intended for refining the concentrate from silicon to produce synthetic rutile. Refining is based on the reduction of SiO2 to SiO with evaporation of the latter from the smelt. Melting was carried out at atmospheric pressure in a laboratory DC plasma-arc furnace with a graphite electrode and crucible. On the current–voltage parameters, the electrical resistance of the bath was determined. It is shown that feeding the concentrate to the bath leads to an increase in the power released in the bath. The increase in power occurs as a result of Lenz–Joule heating due to an increase in the resistance of the bath owing to the presence of a solid phase in it. The power of Lenz–Joule heat release reached 70% of the arc heating power and compensated for the energy costs for melting and thermochemical treatment of the concentrate.