1Department of Research and Development, Hanil Cement Co. Ltd., Korea
2Department of Research and Development, Hanil Cement Co. Ltd., Korea
3Department of Research and Development, Hanil Cement Co. Ltd., Korea
4Department of Research and Development, Hanil Cement Co. Ltd., Korea
5Department of Research and Development, Hanil Cement Co. Ltd., Korea
6Mineral Resources Research Division, Korea Institute of Geosciences and Mineral Resources (KIGAM), Daejeon, 124 Gwahagno, Yuseong gu, Daejeon, 305–350, Korea
7Chemical Engineering Department, Kwangwoon University, Nowon-gu, Seoul
Online published on 20 April, 2017.
The issue of mining cavern is an inevitable with mineral resource development, so a solution is necessary about mining cavern and land subsidence by not only abandoned mine but also operating property. Also, 65% of electric power production in Korea depends on the thermal power generation, and Korean government has a plan to increase 25 the thermal power generation by 6th power supply and demand policy due to recently nuclear accident in Japan. By increasing the thermal power generation, the substitute resource technology is necessary for mass amount ash of the thermal power generation; nine million ton of the thermal power generation ash occurred in 2012. For that reason, this study has done for utilization of mass amount ash from the thermal power generation as abandoned mine backfill material.
In this study, the strength and the expansion of CSA clinker with small amount of cement was increased about 30% compared with an existing OPC and the optimum mix was made to utilize mass amount of fly ash up to 90% in total mix. The optimum mix of fly ash and bottom ash together by CSA clinker cement can be solution of the thermal generation henceforth, then the mix of paste backfill method that is able to handle mass amount of ash was developed to the materials that can fill abandoned mine and underground cavern safely.
Fly Ash, Bottom Ash, Backfill, Power Plant, By-products
