Business
High Recoveries & Product Grades from Unkur Metallurgical Testing
Highlights: Sulphide material: recoveries up to 89.1% copper and 82.7% silver using con...
About this update from Azarga Metals Corp.
[{"type":"text","content":"High Recoveries & Product Grades from Unkur Metallurgical TestingHighlights:Sulphide material: recoveries up to 89.1% copper and 82.7% silver using conventional flotation methods producing commercially attractive ~30% copper & ~2,000 g/t silver concentrateOxide material: recoveries up to 96.4% copper with acid leach and 96.7% silver recoveries with cyanide leachVANCOUVER, BC / ACCESSWIRE / August 4, 2020 / AZARGA METALS CORP. (\"Azarga Metals\" or the \"Company\") (TSX-V:AZR) reports that final results have been received from metallurgical test work on samples taken from the recently completed drilling program on the Unkur Copper-Silver Project in Eastern Russia.Michael Hopley, President and CEO said: \"These final results are very encouraging and show that both copper and silver from the deeper sulphide material and the upper oxide material can be recovered efficiently by conventional methods. Being able to produce a very saleable concentrate consisting of approximately 30% copper and 1,600 - 2,000g/t silver is very positive for the project\".The metallurgical tests were completed by \"The Eastern Mining and Metallurgical Research Institute for Non-Ferrous Metals\" (VNIITsvetMet). They reported that the chemical analyses of the cupriferous quartz-feldspar sandstone drill core samples sent for metallurgical tests were as follows:MetalOxideSulphideCopper %0.560.56Silver g/t30.838.0Gold g/t0.070.05These results are positive because they represent close to the anticipated average grades of the Unkur deposit when mined and show no elevated values of deleterious components, such as arsenic, were identified in mineralized material.Metallurgical Recovery Tests - SulphideThe best results were from sulphide drill core ground to ±80% -0.071 mm. Using various optimized two-stage cleaning locked cycle standard flotation tests on this material showed 87.8 to 89.1% recovery of copper producing a 25.78% to 30.9% copper concentrate. In this same test, silver showed an 81.6% to 82.7% recovery with concentrate grades ranging from 1633.6 g/t to 2034 g/t - see details in Table 1 below:Table 1 - Sulphide Test ResultsProductYield, %Copper, %Silver, g/tPercent Recovery CopperPercent Recovery SilverConcentrate1.9325.781633.689.182.7Tailings 188.100.0535.78.413.2Tailings 29.970.1415.62.54.1Total Tailings98.070.0626.710.917.3Mineralized material...