Evaporation from synthetic incinerator ashes melted by plasma arc

K. Matsumaru, H. Fukuyama, M. Susa, K. Nagata

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Synthetic incinerator ashes of 40 mass %SiO2-40CaO-20Al2O3 (named Glass) and 36 mass %SiO2-36CaO-18Al2O3-10Fe2O 3 (named Fe-Glass) were melted by argon plasma arc, with iron rods used for arc ignition. A direct current transferred type plasma generator was used with an output power of 6 kW. During arc melting, the iron rod was melted and located in the centre of the molten ash. The temperature at the boundary between the iron and ash melts was 2200 K and that at the edge of the ash 1870 K. X-Ray diffraction showed that the deposit vaporised from Glass was composed of Fe, FeSi and amorphous SiO2. The evaporation rates from Glass and Fe-Glass were 3.8 × 10-4 g/s and 1.4 × 10-4 g/s, respectively. It has been concluded that the rate of evaporation from the molten ash is affected by the vaporisation reaction which determines the oxygen partial pressure in the whole system.

Original languageEnglish
Pages (from-to)105-110
Number of pages6
JournalThin Solid Films
Volume316
Issue number1-2
DOIs
Publication statusPublished - 1998 Mar 21
Externally publishedYes

Keywords

  • Argon plasma arc
  • Evaporation
  • Synthetic incinerator ashes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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