The Group recently entered a new era of growth following the successful commissioning and start-up of its flagship asset, the Pressure Oxidation
(POX) Hub at Pokrovskiy, which enables the processing of the Company's abundant refractory reserves and resources.
The fine material will be treated in a pre-acidulation (acid leach) circuit to decompose any remaining carbonate prior to pressure oxidation
. The acidulated material will then be fed to a pressure oxidation
circuit, where an autoclave operating at elevated temperature and pressure in an enriched oxygen atmosphere will extract the vanadium into solution.
was selected as the most feasible processing technology for double-refractory ores.
Lakefield Research, meanwhile, was selected as the lead laboratory for the rigorous pressure oxidation
The Campbell Mine achieved record gold production of 87,643 ounces in the third quarter as the result of higher grades and operation of the pressure oxidation
plant commissioned in July.
It will include an assessment of an open-pit mining scenario followed by flotation and pressure oxidation
of the concentrate for precious metal recovery with tailings deposition similar to historical operations.
With the purchase, FLSmidth will add capabilities of continuous pilot pressure oxidation
, including subsequent leaching and downstream flowsheet, continuous flotation, column flotation, and benchtop roasting.
The IDR of 'B-' reflects Petropavlovsk's small scale of operations, the group's medium-to-high cost position, completion risks associated with the construction of the Pressure Oxidation
(POX) Hub and production ramp-up.
Voisin, "High pressure oxidation
of normal decane and kerosene in dilute conditions from low to high temperature," Journal de Chimie Physique et de Physico-Chimie Biologique, vol.
In early April, Polymetal reported the commissioning of a pressure oxidation
plant (POX) at Amursk and the production of the first Dore gold (263oz).
Aqua regia test results indicate flotation concentration is very amenable to pre-treatment options, such as pressure oxidation
Refractory ores are treated by pressure oxidation
, roasting or bio-oxidation; the last process may enable cut-off grades to be reduced to 1 g/t.