Volatilization Behaviors of Lead Compounds from CaO-SiO2-Al2O3 Molten Slag in N2-HCl Atmosphere

• Kawachiyama Takuya

  Department of Energy Engineering and Science, Nagoya University

• Kageyama Hiroki

  Department of Energy Engineering and Science, Nagoya University

• Osada Shohichi

  Department of Energy Engineering and Science, Nagoya University

• Kubota Mitsuhiro

  Department of Energy Engineering and Science, Nagoya University

• Matsuda Hitoki

  Department of Energy Engineering and Science, Nagoya University

Bibliographic Information

Other Title

• Ｎ２－ＨＣｌ雰囲気におけるＣａＯ－ＳｉＯ２－Ａｌ２Ｏ３溶融スラグからの鉛化合物の揮発挙動
• N ₂-HCl フンイキ ニ オケル CaO-SiO ₂-Al ₂ O ₃ ヨウユウ スラグ カラ ノ ナマリ カゴウブツ ノ キハツ キョドウ

Abstract

Volatilization behaviors of lead compounds from CaO-SiO₂-Al₂O₃ were studied using a lab-scale heating apparatus under N₂-HCl mixed gas flow rate of 5×10⁻⁶m³ · s⁻¹ (gas velocity of 3.61×10⁻³m · s⁻¹) at HCl partial pressure of 0.0017, 0.005 and 0.0067 atm in the temperature range of 1673 to 1773K. The employed slag samples were adjusted to 20-40wt% CaO, 30-60wt% SiO₂ and 20-40wt% Al₂O₃ in composition. The initial content of PbO in the slag samples was set at 2000mg · kg⁻¹. The rate of volatilization of lead compounds from the molten slag was determined by time change of the content of PbO which remained in the slag.<BR>As a result, it was found that the rate of volatilization of lead compounds from CaO-SiO₂-Al₂O₃ molten slag in N₂-HCl atmosphere was higher than that in N₂-O₂ atmosphere. The apparent rate constant of volatilization of lead compounds from the employed slag samples increased almost linearly with the HCl partial pressure. It was also found that the rate of volatilization of lead compounds was higher from CaO-SiO₂-Al₂O₃ molten slag, with a lower viscosity of high CaO content slag, and was higher with a rise in melting temperature.

Journal

• Journal of the Japan Society of Material Cycles and Waste Management

  Journal of the Japan Society of Material Cycles and Waste Management 22 (6), 354-360, 2011

  Japan Society of Material Cycles and Waste Management

Keywords

• hydrogen chloride
• lead compound
• molten slag
• municipal solid waste
• rate of volatilization

Details

• CRID: 1390001205313931648
• NII Article ID: 10030021041
• NII Book ID: AA12384878
• DOI: 10.3985/jjsmcwm.22.354
• ISSN: 18835899
• ISSN: 18835856
• NDL BIB ID: 023465815
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023465815
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed