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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (22권3호 121-129)

Investigation of Reclamation for Waste CO₂ Mold Sand of Steel Foundries in Busan and Gyeong Area

부산 ${\cdot}$ 수식 이미지 경남지역 주강 공장의 CO₂ 주형 고사의 발생실태와 재생에 관한 연구

Jun-Oh Choi, Min-Seop Kim, In-Seok Choi, Byung-Wook Cheon, Chang-Ock Choi

Dong-A University


According to the investigation ofwaste Co2 molding sand in the 15 steel foundries in Busan and Gyeong area, about 1 ton of waste CO2 molding sand per ton of steel castings production was produced In order to reduce amount ofN§O, Loss of Boiling (L.O.B), Loss of Ignition (L.O.I), Conductivity and PH which are present in the waste CQ molding sand below the reclamation effect, more than 50% of elimination for reclamation was required. It was found that the waste CQ molding sand does not contain a harmful component designated by industrial waste materials. Reclamation of the Waste CO2 molding Sand was practically achieved by an abrasive-diy reclamation process.According to bench time of the sodium silicate-bonded cg molding sand, reduction of compressive strength and surface stability index(S.S.I) become slowdown. Therefore, the reclaimed sand could be allowed the reuse of molding sand in CO2 molding process including core sand.


waste CO2 molding sand , N320, sodium silicate, reclaimation process, reuse, reclaimation effect, reclaimed sand