Molybdenite Flotation in the Sarcheshmeh Copper Complex was studied as a function of pulp potential, controlled using two types of sodium sulfide, a mineral origin and a chemical nature. Air and either plant or laboratory nitrogen were used as Flotation careers. Potential readings took place in rougher cells, as it was proved to be vital in the molybdenite circuit. Results showed that, at reducing potentials between -525 and -575 mv, the highest molybdenum recovery of 93% and the lowest copper recovery of 4-15% can be achieved. These potentials did not change considerably by adding extra amounts of sodium sulfide. At more oxidizing potentials, i.e. more than -450 mv, copper recovery increases while the recovery of Molybdenite drops.

Flotation is the most important process for concentrating mineral ores. This process may occur in any vessel such as column Flotation, which has been used widely during the last decade and the conventional Flotation cells. The effect of superficial feed velocity on the copper recovery was investigated using pilot-scale column Flotation of "Sarcheshmeh Copper Complex". The results were compared with the conventional Flotation cell data. It was reveled that for coarse particles (d(80)=90 mu m) this column could not be used instead of cells and rougher cells, but for small particles (d(80)=44 mu m) it could, For coarse particles, recovery curve demonstrated a maximum with increase in feed rate. However a minimum was observed for fine particles.

In this paper, we report a geospatial assessment of the selected mine sites in the Plateau State, Nigeria. The aim of this work is to determine the impact of mining on the terrain as well as the Land Use/Land Cover (LULC) of the host communities. The Shuttle Radar Topographic Mission (SRTM) is used for the terrain mapping. The derived impact of mining on LULC between 1975 and 2014 is determined by classifying the relevant Landsat imageries. The digital terrain map reveal that the mining activity is not well-coordinated. Hence, the parts of the mine sites that are rich in the desired minerals are punctuated with low depth, while the other parts have high terrain as a result of the haphazard mining activity. The analysis of the LULC change show that the degraded land (DL), built-up area (BU), water bodies (WB), and exposed rock outcrop (RO) increase by 15. 68%, 4. 68%, 0. 06%, and 14. 5%, respectively, whereas the arable farmland (FL) and forest reserve (FR) decrease by 28. 29% and 6. 63%, respectively. Mining has adversely affected the natural ecology of the studied area. Therefore, the mine sites should be monitored, and their environmental damages should be pre-determined and mitigated. There should be regular inspections to keep these activities under control. The existing laws and regulations to conserve the natural ecosystems of the host communities should be enforced to curtail the excesses of the operators of the mining industries. Restoration of the minefields to reduce the existing hazards prevent further environmental degradation, and facilitating the socio-economic development of the area is also suggested.