Կայքի հին տարբերակը
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Open Pit


Geological survey works that led to the discovery of Teghout Copper-Molybdenum Deposit started in 1972. Exploration drillings and other geological works were carried out for around 20 years. As a result, the ore body geometry has been defined and the industrial reserves have been approved by the State Reserves Committee of Soviet Union.

Excavators carrying out the stripping works load the rocks into the trucks. During the pre-stripping phase all trucks transport the waste rocks to the waste dump. After reaching the ore body, the extracted ore is transported to the enrichment plant, while the waste rocks are transported to the waste dump.

In the open pit is used machinery of the well-known Caterpillar Company. The excavators are CAT 6018 with 10 cubic meter bucket capacity. And the trucks used for transportation are CAT 777 F vehicles, with 90 tonnes carrying capacity.

Parallel to open pit also waste dump is formed.

During the recultivation works foreseen during and after exploitation the waste dump is covered with fertile soil layers, followed by plantation of trees and shrubbery.

For more deails please see the Working Draft 3.1

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Tailing Dum

 


Tailings from the enrichment plant are removed through a gravity flow system pipeline into the tailing dump located in the River Kharatanots gorge. Natural water flows are moved from the gorge in advance, using the hydro-technical constructions. The volume foreseen for the tailings allocation is formed through dam constructed by using clay and the dead rocks derived from the mine stripping. The filtered water collected as a result of squeezing the tailings is transported to the secondary sedimentation reservoir trough the collector.

With the raising level of dehydrated tailings, the wells receiving water on the lower level of the collector are closed, and the water is removed through the upper level wells. When the initial space is full, the dam is elevated by filling the sludge towards the tailings zenith.

After infiltration in the secondary sedimentation pond, water is pumped back to the enrichment plant. The closed water cycle eliminates the possibility of polluting the environment by industrial effluents.

In parallel with the tailing dump exploitation, within the framework of recultivation works, the slopes of the dam and after the exploitation the whole surface of it are covered with a fertile soil layer and planted.

For more deails please see the Working Draft 3.3.

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Processing Plant


The ore will be transported from the mine site by mining haul trucks to two jaw crusher stations. As the amount of the ore brought from the open pit varies, to ensure stability of processing and supply of the ore for the subsequent phases, ore stockpile for the crushed ore is foreseen. The crushed ore will be conveyed to a coarse ore stockpile with live capacity of 35,000 metric tons.

Then the ore will be conveyed to the grinding circuit. With certain amount of water and metal balls, the ore is then placed into the 10.4m diameter and 4.6m long Semi-Autogenous Grinding (SAG) mill.

Pieces bigger 12mm are conveyed back into the mill. The ore pulp is pumped into the cyclone cluster of eight hydrocyclones in a closed circuit with the 6.1m diameter and 10m long ball mill. The sand with particles larger than 149 μm is crushed in the ball mill.

The ball mill cyclone overflow with particles not larger than 149 μm will flow by gravity to the bulk flotation circuit, where necessary reagents are added.

Due to lower slurry level, metal-containing minerals accumulate on the surface of the air bubbles provided from below part, and move up accumulating in the foam layer which is the basis for the concentrate.

The initial bulk flotation circuit contains one line of eight smartcells. The concentrate regrind circuit consists of a 3.1x5.5m regrind ball mill and a cluster of ten hydrocyclones. There are seven cells in the bulk flotation first cleaning stage; five cells in the cleaner scavenger stage and two cells in the second bulk flotation cleaning stage.

The final bulk concentrate will be thickened in a 15m diameter thickener and the underflow will be pumped to the molybdenum separation (flotation) stage. The tailings from bulk flotation will flow by gravity to the tailings pond.

The molybdenum flotation includes molybdenum roughers and six stages of molybdenum cleaners.


The reagents ensure that only minerals containing molybdenum are collected on the air bubbles surface and in the froth.


The molybdenum flotation tailings, which are the final copper concentrate, will be thickened in a 15m diameter thickener. The thickener underflow will be filtered by an automatic filter press. The dewatered filter cake will fall by gravity to the concentrate storage area.

In molybdenum cleaning circuit, there are 11 cells and columns as cleaners. The final molybdenum concentrate will be thickened by a 8m diameter thickener and filtered by one unit of pneumapress.

The molybdenum concentrate cake will be dried and bagged for shipment.


For more details see the Working Draft 3.2
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