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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

年間 4 号発行

ISSN 印刷: 1093-3611

ISSN オンライン: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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HEAVY METALS VOLATILITY STUDY DURING THERMAL PLASMA VITRIFICATION BY OPTICAL EMISSION SPECTROSCOPY

巻 7, 発行 1, 2003, 8 pages
DOI: 10.1615/HighTempMatProc.v7.i1.90
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要約

Fly ash issued of incineration of wastes content high proportion of heavy metals salts specially chlorides and sulfates.
According to the volatility of these compounds observed during vitrification of fly ash, a predictive model has been used to simulate the elimination of Pb, Zn and S from the melt as a function of time and temperature for a system including chlorides, oxides and sulfates.
The objective of this work was the experimental study of heavy metals volatility using optical emission spectroscopy. A twin torch plasma system, mounted above a cold crucible with Ar (or Ar + O2) as plasma gas, has been used. The crucible was filled with synthetic glass in which known amounts of metallic salts were added to obtain the same chemical composition as used in the model.
From spectral lines intensities of Ar, the plasma temperature profiles along the observation direction has been first established, before using ratios of spectral lines of Ar and metallic (Pb, Zn) or Cl vapors to reach the evolution of the elements concentrations above the melt. The influence of the atmosphere( Ar or Ar + O2) above the crucible has been studied and differences in elements behaviors have been pointed out.
The results of the spectroscopic measurements have been compared to the ones issued of modeling, in order to validate our model of vaporization.

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