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Received October 18, 2011
Accepted December 12, 2011
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열분해에 의한 폐인조대리석으로부터 산화알루미늄 회수에 관한 연구
A Study on Recovery of Aluminum Oxide from Artificial Marble Waste by Pyrolysis
경상대학교 공과대학 생명화학공학과, 경남 진주시 진주대로 501 1(주)알앤이, 경남 창원시 창곡동 77-7
Department of Chemical and Biological Engineering, Gyeongsang National University, 501 Jinju-daero, Jinju, Gyeongnam 660-701, Korea 1R and E Ltd., 77-7 Changgok-dong, Changwon, Gyeongnam 641-390, Korea
Korean Chemical Engineering Research, June 2012, 50(3), 567-573(7), NONE Epub 5 June 2012
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Abstract
인조대리석은 천연대리석에 비해 우수한 외형, 높은 마감도, 고른 빛깔, 압력과 마모에 대한 우수한 저항성, 부식과 풍화에 대한 우수한 저항성 등의 장점을 가지고 있다. 그래서 인조대리석은 주방용 조리대, 욕실 세면대, 가구, 안내 데스크 등에 다양하게 사용되고 있다. 그러나 인조대리석을 자르고 마감하는 과정에서 많은 양의 폐기물들이 스크랩 또는 분진의 형태로 발생한다. 고급스런 인테리어 재료의 수요의 증가에 따라 인조대리석으로부터의 폐기물은 증가하고 있다. 폐인조대리석은 분쇄, 열분해, 증류공정 등을 통하여 전자재료, 세라믹 등의 원료가 되는 산화알루미늄 및 인조 대리석의 원료가 되는 MMA로 재생이 가능하다. 폐인조대리석의 특성을 TGA/DSC 및 원소분석을 통해 그 특성을 분석하였다. 폐인조대리석을 분쇄 및 열분해하여 원 산화알루미늄을 얻었다. 본 연구에서는 원 산화알루미늄을 회수하는 공정의 최적화를 위해 Box-Behnken 실험계획법을 사용하였다. 원 산화알루미늄의 특성치는 색도 분석, 원소 분석 그리고 표면적 등에 의하여 평가하였다.
Compared with the natural marble, the artificial marble has the advantages of excellent appearance, high degree of finish, even color, fine pressure and wear resistance, bear erosion and weathering, etc. It can be widely used in kitchen countertops, bath vanity tops, table tops, furniture, reception desks, etc. However, large amounts of artificial marble waste such as scraps or dust have been generated from sawing and polishing processes in artificial marble industry._x000D_
Waste from artificial marble industry is increasing according to demand magnification of luxurious interior material. Artificial marble wastes can be recycled as aluminum oxide used as raw materials in electronic materials, ceramics production, etc., and methyl methacrylate(MMA) which become a raw material of artificial marble by pulverization, pyrolysis and distillation processes. The characteristics of artificial marble wastes was analyzed by using TGA/DSC and_x000D_
element analysis. Crude aluminum oxide was obtained from artificial marble waste by pulverization and thermal decomposition under nitrogen atmosphere. In this work, Box-Behnken design was used to optimize the pyrolysis process. The characteristics of crude aluminum oxide was evaluated by chromaticity analysis, element analysis, and surface area.
Keywords
References
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Aruntas HY, Guru M, Dayi M, Tekin I, Mater. Des., 31, 4039 (2010)
Box GBP, Behnken DW, Technometrics., 2(4), 455 (1960)
Kotlar CE, Aguero MV, Roura SI, Ind. Biotechnol., 6(6), 364 (2010)
Grassie N, Pure Appl. Chem., 54(2), 337 (1982)
Kaminsky W, Eger C, J. Anal. Appl. Pyrolysis., 58-59, 781 (2001)
Grause G, Predel M, Kaminsky W, “Monomer Recovery from Alumiun Hydroxide High Filled Poly(methyl methacrylate) in a Fluidized Bed Reactor,”, 75, 236 (2006)
