One solution for resources recycling-reduction of So2 gas and Gypsum by waste plastics

Katsunori Yamaguchi, Shigeru Ueda, Takahiko Okura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper describes the new technologies for fixation of smelting So 2 gas as elemental sulphur and for converting gypsum to recycled calcium resource using waste organic materials. To produce nonferrous metals, the So2 gas is also generated from the raw materials such as sulphide or sulphate. A process that produces elemental sulphur from nonferrous smelter gas and waste plastics was investigated. Polyethylene was used as a deoxidiser of So2 gas in the present study. The conditions for reaction of So2 and polyethylene to make gas mixtures of H2S and So2 were calculated thermodynamically. The Claus reaction was applied to produce elemental sulphur from H2S and So2 gas mixture. More than 90 % sulphur recovered from So2 gas. A recycle of calcium resources as CaO or CaS from the waste gypsum was developed with a reduction process of the gypsum using plastics at high temperature. Reduction behaviour of CaSo 4 by polyethylene at temperature from 1,273 to 1,573 K was studied with gravimetry and X-ray diffraction analysis. From the experimental results, we found that complete reduction of CaSo4 to CaO can be done at the molar ratio more than 3/1 of CH2/CaSo4 for 2 h above 1,473 K, and increasing CaSo4-CH2 gas interface tend to advance the reduction of CaSo4.

Original languageEnglish
Title of host publicationProceedings - European Metallurgical Conference, EMC 2009
Pages267-278
Number of pages12
Volume1
Publication statusPublished - 2009
Externally publishedYes
Event5th European Metallurgical Conference, EMC 2009 - Innsbruck
Duration: 2009 Jun 282009 Jul 1

Other

Other5th European Metallurgical Conference, EMC 2009
CityInnsbruck
Period09/6/2809/7/1

Fingerprint

Calcium Sulfate
Gypsum
Recycling
Gases
Plastics
Sulfur
Polyethylene
Polyethylenes
Gas mixtures
Calcium
Nonferrous metals
Gravimetric analysis
Smelting
Sulfides
X ray diffraction analysis
Sulfates
Raw materials
Temperature

Keywords

  • Calcium
  • Gypsum
  • Nonferrous metals
  • Recycling
  • Reduction process
  • So-gas
  • Waste organic materials
  • Waste plastics

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Yamaguchi, K., Ueda, S., & Okura, T. (2009). One solution for resources recycling-reduction of So2 gas and Gypsum by waste plastics. In Proceedings - European Metallurgical Conference, EMC 2009 (Vol. 1, pp. 267-278)

One solution for resources recycling-reduction of So2 gas and Gypsum by waste plastics. / Yamaguchi, Katsunori; Ueda, Shigeru; Okura, Takahiko.

Proceedings - European Metallurgical Conference, EMC 2009. Vol. 1 2009. p. 267-278.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yamaguchi, K, Ueda, S & Okura, T 2009, One solution for resources recycling-reduction of So2 gas and Gypsum by waste plastics. in Proceedings - European Metallurgical Conference, EMC 2009. vol. 1, pp. 267-278, 5th European Metallurgical Conference, EMC 2009, Innsbruck, 09/6/28.
Yamaguchi K, Ueda S, Okura T. One solution for resources recycling-reduction of So2 gas and Gypsum by waste plastics. In Proceedings - European Metallurgical Conference, EMC 2009. Vol. 1. 2009. p. 267-278
Yamaguchi, Katsunori ; Ueda, Shigeru ; Okura, Takahiko. / One solution for resources recycling-reduction of So2 gas and Gypsum by waste plastics. Proceedings - European Metallurgical Conference, EMC 2009. Vol. 1 2009. pp. 267-278
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