Similarly, the district mill saw improved throughput and metallurgical performance. In May, the milled approximately 5,750 tonnes of ore, representing an approximate 19% increase over the previous month. The mill operated for 16 days, nine of which operating at throughput above the nameplate capacity of 400 t/d. The metallurgical performance continued to be robust, with over 93% total silver recoveries to concentrate and in excess of 16,300 g/t silver in the lead concentrate.
Still, while the underground performance improvements are notable, and the demonstrated supply of 150-250 t/d of ore to the mill has been important, Alexco notes that results to date suggest the rate of improvement in the advance of underground development remains insufficient to achieve the necessary number of production headings to sustain 400 t/d feed to the mill before the end of 2022.
To rectify this imbalance, the company has decided to temporarily…
