Papers by Keyword: Capital Cost

Abstract: The BIOX^® process was developed in the late 1980’s for the treatment of refractory gold concentrates. The process has since developed into a commercially proven process with 12 successful installations of which 6 are currently still in operation. During this time development of the technology continued to improve the efficiency of the process, improve the reliability of the equipment used and to reduce the capital and operating cost for the implementation and operation of the process.This paper will look at some critical aspects in the selection of the BIOX as the preferred technology for the treatment of a refractory gold. Process selection will include technical criteria, for example the amenability of a concentrate to biooxidation and process design criteria, but will also include the overall project economic evaluation, a study of the project risks, the impact of the project and technology on the environment and local communities, operability of the process and implementation strategy.It is important that these aspects be taken into consideration in the design of any testwork program, be it fundamental research in the biooxidation field or in the development of a specific project. The impact of decisions taken during the execution of the program must also be tested continuously to gauge the impact on the overall process viability.The selection of biooxidation as the preferred process route for any project, be it gold, copper or any other mineral, will in most cases be based on the overall project economics compared to other processes, rather than technical considerations.

Abstract: Based on the relation of the operating resource consumption, the capital cost and the motivation of quality cost, this paper proposed that the cost for improving product quality in the capital cost was regarded as a part of the quality cost, from this the quality cost was re-defined. And in order to distribute and control the quality cost reasonably, the paper based on the evaluation system of EVA, used PVA to assign the quality cost into the various stages of production.

Abstract: A generalized approach for the economic selection of wind turbine for a given wind regime is proposed in this paper. It draws from the literature and standards being used in the field to arrive at an economic site specific wind turbine based on minimizing the annual cost of energy produced (AEP) while tracking the initial capital cost (ICC) of investment required. It is meant to provide an initial study to guide decision makers who are contemplating using wind energy as a power source to generate electricity in commercial quantity for community usage. It is a general estimation approach which does not require surfing for manufacture prices and wind turbine parameters. The input data consists of site specific wind data, hub height, rotor diameter and turbine power rating. The output gives a range of plots of feasible wind turbine ratings, rotor diameters, rated speed against initial capital cost (ICC) and also cost of energy produced (COE).