标题：Technical Feasibility Study and Economic Development of Limestone at Pelawi Hill by PT.Semen Baturaja (Tbk.) in OganKomeringUlu District of South Sumatra
期刊名称：IJEMS (Indonesian Journal of Environmental Management and Sustainability)
印刷版ISSN：2598-6260
电子版ISSN：2598-6279
出版年度：2018
卷号：2
期号：1
页码：24-29
DOI：10.26554/ijems.2018.2.1.24-29
语种：English
出版社：ARTS Publishing Corp.
摘要：Mining of limestone for cement has been increasing in Indonesia.PT.Semen Baturaja (Persero) Tbk.is one of cement producer in Indonesia;the Company has a strategic plan with expanding the limestone mining in Bukit Pelawi,Ogan Komering Ulu Regency.From the mine,the Company targets 2,000,000 tons of limestone per year to support the plan to increase cement production from 1.5 to 3.4 million tons per year.This study makes a technical and economic assessment of the Company's action plan.Based on detailed exploration drilling conducted,it has been identified limestone resources of 80.3 million tons and mining reserves of 43.4 million tons.Compositely,the quality of limestone that has been mine by company is CaO> 43% and RCO3> 78%.The value of Cut of Grade (COG) which is still categorized by ore is CaO at 30% and RCO3 is 70%.The results of this study indicate the assumption of the selling value of limestone with composite quality of Rp 48,500 per ton with a maximum production rate of 2 million tons per year,still provides eligibility criteria for all investment parameters that is calculated showing IRR 13.72%,NPV (+) Rp 5,111,313,765.-,PBP for 6.42 years.The effect of increasing or decreasing cement price assumption and operational cost ± 1.5%,will give a significant effect on the rate of return on the calculation of this study.
