L.D. 전로슬랙을 (轉爐) 이용한 규산소오다계 자경성주형의 (自硬性鑄型) 일반성질 = Technical Properties of Self-hardening Sand Mold Using Sodium Silicate Binder and L.D. Converter Slag Hardener

다국어 초록 (Multilingual Abstract)

Investigations have been carried out to develop self-hardening sand mold using sodium silicate binder and L.D. converter slag hardener. On weight basis, the amount of sand-mix were varied 100 % sand, from 4%, to 9% binder and from 2% to 5% hardener. For laboratory investigations, standard sand samples were prepared and tested for compressive strength, S.S.I., bench time, retained moisture and retained compressive strength, The results obtained indicate a distinct possibility of using L. D. converter slag hardener in the self-hardening molding process with sodium silicate, It was observed that the composition of L. D. converter slag has β-C₂S and about 2 degree of basicity, compressive strength and surface stability increase and retained compressive strength, retained moisture, and bench time decrease with increase in the percentage of hardener in relation to binder.