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Consolidation to Bulk Ceramic Bodies from Oyster Shell Powder

굴 패각 분말로부터 벌크 세라믹 구조체 제조

  • Received : 2016.02.24
  • Accepted : 2016.04.05
  • Published : 2016.06.28

Abstract

Waste oyster shells create several serious problems; however, only some parts of them are being utilized currently. The ideal solution would be to convert the waste shells into a product that is both environmentally beneficial and economically viable. An experimental study is carried out to investigate the recycling possibilities for oyster shell waste. Bulk ceramic bodies are produced from the oyster shell powder in three sequential processes. First, the shell powder is calcined to form calcium oxide CaO, which is then slaked by a slaking reaction with water to produce calcium hydroxide $Ca(OH)_2$. Then, calcium hydroxide powder is formed by uniaxial pressing. Finally, the calcium hydroxide compact is reconverted to calcium carbonate via a carbonation reaction with carbon dioxide released from the shell powder bed during firing at $550^{\circ}C$. The bulk body obtained from waste oyster shells could be utilized as a marine structural porous material.

Keywords

Oyster shell;Carbonation reaction;Reaction sintering

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Acknowledgement

Supported by : 금오공과대학교