The Technical And Economic Evaluation Of Laoxigou Polymetallic Deposit,Aohanqi Of Inner Mongolia

Mineral resource economics is based on geological evaluation of ore deposits and combined with the theory and method of modern economics, which also depends on economic and technical conditions, and helps get the evaluation of potential economic benefits in the process of development and utilization of proven reserves. The paper aims to make the technical and economic evaluation of Laoxigou polymetallic deposit, Aohanqi,Inner Mongolia and evaluate feasibility and benefits of the project.The paper has recommended in detail the geological conditions and available mining and technical conditions of the deposit. We adopt flotation technology in the process of mining. It estimates the resource reserve and combines with industrial index by means of geological block method. We can get important economic benefits indicators such as sales revenue, costs of production and profits of the mine after calculation. Then on the base of these, this paper applies the theory of static economic evaluation and dynamic economic evaluation, analyzes the economic benefit of the deposit. We adopt net present value method, inside income rate method and investment recovery period method to analyze the economic benefits of the ore. Considering that the uncertainty of the price of mineral products and other uncertain factors may have an impact on investment returns, the project was adopted on sensitivity analysis.This paper obtains the following results and conclusion through the analysis and research:The geology and hydrological geology of Laoxigou mine is very simple. There is no new tectonic activity in the ore district. After sampling, testing and analysis, we can know that polymetallic ore are in a majority. The main elements, which can be developed and utilized, are copper, lead, zinc and silver. There are little hazardous elements in the ore.The mining scale of Laoxigou polymetallic deposit is 320, 000 tons(ore reserve). For the mining and mill, it can reach 200 tons every day with 320 working days every year. With a two-year capital construction, the service life of mine is five years. The annual profit is34,628,400 million yuan. The net profit is 25,972,100 million yuan. For the resource tax and income tax, it is 12,420,000 million yuan. From the related basic data, for example,the cash inflow and cash outflow, we can know that the financial net present value is22,956,500 yuan. We get a result that the internal rate is 24.19% from the calculation of two different conditions, which includes the net present value of 20% and 25%. We also know that the project can recover the pre-venture capital after 4.06 year's development from the net cash flow statement and dynamic investment recovery period.Based on the above evaluation results, and combined with internal run rate during sensitivity analysis, especially in the condition of the investment costs and production costs increases and decreases, the basic rate of income does not change very much. The project can run stably, and has a great anti-risk ability. After comprehensive evaluation we can get a conclusion that the project can achieve the investors' expectation of the revenue,and it is full of feasibility.