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Korean Journal of Metals and Materials > Volume 59(4); 2021 > Article
Korean Journal of Metals and Materials 2021;59(4): 273-280. doi: https://doi.org/10.3365/KJMM.2021.59.4.273
물유리계 바인더로 제조한 천연주물사와 인공주물사 중자의 강도 특성
배민아1, 김판성1,2, 김경호1, 이만식1,3, 백재호1
Characterization of the Strength of a Natural Sand and Artificial Sand Core Manufactured with Inorganic Binder
Min A Bae1, Pan Seong Kim1,2, Kyeong Ho Kim1, Man Sig Lee1,3, Jae Ho Baek1
1Green Materials & Processes Group, Korea Institute of Industrial Technology (KITECH), Ulsan 44413, Republic of Korea
2Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
3Department of Green process and System Engineering, University of Science and Technology, Daejeon 34113, Republic of Korea
Correspondence  Jae Ho Baek ,Tel: +82-52-980-6632, Email: jhbaek@kitech.re.kr
Received: 5 January 2021;  Accepted: 8 February 2021.  Published online: 24 March 2021.
Natural sand and organic binders are commonly used in casting processes, but these ingredients produce environmental problems with dust and harmful TVOC(Total Volatile Organic Carbon) gases. Research on the introduction of artificial sand and inorganic binders to solve these environmental problems is being actively conducted mainly in the casting industry. Artificial sand has superior durability and a spherical shape compared to natural sand, and above all, it does not generate dust. In addition, inorganic binders have the advantage that no harmful gas is generated during casting and the used sand can be recycled. This study confirmed whether inorganic binders can be applied when replacing natural sand with artificial sand. First, eco-friendly inorganic binders that do not produce harmful gas were synthesized. Then characteristic analyses were carried out with artificial sand and natural sand. Physical and chemical properties were compared using X-Ray Fluorescence (XRF), Powder Flow Test (PFT) and particle size distribution analyses. The general strength and absorption (absolute humidity 29.9 g/cm3) strength of the sample core was measured using each sand (artificial sand, natural sand) and inorganic binder. Also, X-ray Photoelectron Spectroscope (XPS) analysis confirmed the combination structure. As a result, it was confirmed that artificial sand exhibited mold characteristics with similar strength even with lower inorganic binder content than natural sand.
Keywords: inorganic binder, sand core, natural sand, artificial sand, strength
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