Kinetic Study on Volatilization of PbO from CaO-SiO2-Al2O3 Molten Slag Simulating Mnnicipal Solid Waste Melting

• Kageyama Hiroki

  Department of Energy Engineering and Science, Nagoya University

• Kawachiyama Takuya

  Department of Energy Engineering and Science, Nagoya University

• Osada Shouichi

  Department of Energy Engineering and Science, Nagoya University

• Kawaguchi Yuuki

  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

• 都市ごみ溶融を模擬したＣａＯ‐ＳｉＯ２‐Ａｌ２Ｏ３系溶融スラグからの酸化鉛の揮発速度解析の検討
• 都市ごみ溶融を模擬したCaO-SiO2-Al2O3系溶融スラグからの酸化鉛の揮発速度解析の検討
• トシゴミ ヨウユウ オ モギ シタ CaO SiO2 Al2O3ケイ ヨウユウ スラグ カラ ノ サンカ ナマリ ノ キハツ ソクド カイセキ ノ ケントウ
• Kinetic Study on Volatilization of PbO from CaO-SiO2-Al2O3 Molten Slag Simulating Municipal Solid Waste Melting

Abstract

A kinetic study on the volatilization of PbO from CaO-SiO₂-Al₂O₃ molten slag, which simulated the volatilization of PbO in municipal solid waste melting, was conducted at a temperature range of 1673 to 1773 K in an 80% N₂, 20% O₂ atmosphere with a space velocity of N₂-O₂ mixed gas of 1.50×10⁻⁴~3.01×10⁻³ m·s⁻¹ in the melting furnace. The composition of the employed slag was varied by changing the weight ratio of CaO, SiO₂ and Al₂O₃ from 10 to 60wt%. The rate of volatilization of PbO was determined based on the film theory, with the assumption that the kinetic model might be applicable to the transportation of PbO from CaO-SiO₂-Al₂O₃ molten slag to the gas phase. The rate of volatilization of PbO from CaO-SiO₂-Al₂O₃ molten slag in an N₂-O₂ atmosphere was estimated by taking into consideration the rate of vaporization of Mn from iron melting in an argon gas flow condition at atmospheric pressure. In the present study, the overall mass transfer coefficient was determined as a function of slag composition and temperature, and the rate of volatilization of PbO from CaO-SiO₂-Al₂O₃ molten slag was estimated.<BR>As a result, it was apparent that the rate of volatilization of PbO from CaO-SiO₂-Al₂O₃ molten slag in the N₂-O₂ gas flow condition was influenced by both the rate of vaporization of PbO from the interface of gas-molten slag and the mass transfer rate of PbO in the liquid phase, when the flow rate of 80% N₂, 20% O₂ mixed gas was higher than 9.02×10⁻⁴ m·s⁻¹. The calculated results on the volatilization of PbO predicted by the present kinetic study were in fairly good agreement with the experimental results for a low viscous CaO-SiO₂-Al₂O₃ molten slag with 0.40 to 1.4Pa·s viscosity under the present experimental conditions.

Journal

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

  Journal of the Japan Society of Material Cycles and Waste Management 22 (1), 52-60, 2011

  Japan Society of Material Cycles and Waste Management

Keywords

• lead oxide
• molten slag
• municipal solid waste
• rate of volatilization
• utilization of slag

Details

• CRID: 1390282680292313984
• NII Article ID: 10027949070
• NII Book ID: AA12384878
• DOI: 10.3985/jjsmcwm.22.52
• ISSN: 18835899
• ISSN: 18835856
• NDL BIB ID: 11000142
• Web Site: http://id.ndl.go.jp/bib/11000142
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11000142
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed