The capital value of restarting the oxide plant totals $8.9 million. This consists of $4.4 million for the plant, $217,134 for utilities, $182,110 for regents and $4.1 million for indirects. The annual value of working this a part of the plant could be $9.22 per tonnes of ore processed.
The scoping research contemplates feeding run-of-mine ore to the prevailing main and secondary crushing circuits. The crushed ore could be stockpiled forward of tertiary crushing and screening forward of a wonderful ore silo. Tine ore could be additional diminished in a ball mill and labeled in a cyclone financial institution. Cyclone overflow would feed a brand new trash display earlier than being thickened.
Thickener underflow would feed the leach tank, with leach tails reporting to belt filters. The filter cake could be fed to an agglomerator for placement on the prevailing leach pad.
Thickener overflow and filtrate would feed the carbon absorption columns.
Within the second a part of the research, the capital value of changing the mill to a flotation plant to get better base metals could be $65.7 million. The sum consists of $6 million for a tailings facility, $534,181 for a filtered tailings return line, $31.1 million for the mill rebuild, $817,162 to ascertain air compression potential, $133,603 for course of water, $940,000 for reagents and $26.2 million for indirects.
The run-of-mine ore would observe a separate circuit from the oxide ore, however it could be configured a lot the identical method via ball milling and classification.
The flotation space would come with sequential lead-silver the zinc circuits, every consisting of a rougher, adopted by regrinding, after which three phases of cleansing. Separate lead-silver and a zinc concentrates, in addition to flotation tails could be dewatered and stockpiled individually. Tailings could be transported and filtered at a lined storage space, and the answer could be pumped again to the mill as float course of water.
“With considerable oxide mineralization having been recognized at each Ruby Hill and Granite Creek, we felt it was prudent to evaluate the potential restart of the Ruby Hill CIL plant as a second firm operated processing facility,” stated i-80 president and CEO Matt Gili. “Owing to the anticipated low capital value, and accelerated timeline for restart, this plant has the potential to boost our proposed stand-alone working capabilities in Nevada.”