STUDI OPTIMASI PIT TAMBANG TERBUKA UNTUK SKEMA PENJUALAN ORE DAN FERONIKEL PADA PENAMBANGAN BIJIH NIKEL PT FGD
PT FGD is a company engaged in nickel mining and will conduct mining in a location with an area 373.2 hectares. In the planning process, PT FGD wants to know the comparison of reserves and profits for two mining product sales schemes, namely nickel ore and ferronickel. Therefore, a pit optimization...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/63981 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | PT FGD is a company engaged in nickel mining and will conduct mining in a location with an area 373.2 hectares. In the planning process, PT FGD wants to know the comparison of reserves and profits for two mining product sales schemes, namely nickel ore and ferronickel. Therefore, a pit optimization process was carried out to obtain an overview of the number of reserves and profits for the two schemes. Micromine software is used to perform pit optimization in this study. The optimization process uses the Lerch-Grossman algorithm, which has become the standard algorithm for optimizing an open pit. PT FGD's technical and economic parameters are used as input for optimization. After getting the pit shell optimization results for the ore sales scheme, re-optimization was carried out for the ferronickel sales scheme. The two pit shells are the basis for creating the ultimate pit limit based on the nickel ore and ferronickel sales scheme. The analysis is then carried out by looking at the results between the optimization pit shell and the ultimate pit limit of the two sales schemes. Different sales schemes in nickel mining affect the number of reserves to be obtained. The pit shell optimization results show that the nickel ore sales scheme has 2.4 times more resources, but the net value of the ferronickel sales scheme is 1.9 times the net value of the ore sales scheme. The elemental content of Ni mined from each tonne of ore for the ore sales scheme has a lower grade than the ferronickel sales scheme. Likewise, the levels of SiO2 and MgO from the ore sales scheme have lower grades than the ferronickel sales scheme. As for the Fe content, the ore sales scheme has a higher grade than the ferronickel sales scheme. |
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