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MEI Online: Plant Operation News: North America: October 18th 2019


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:: Bayhorse Commissioning Silver Milling and Concentrate Cicuit at the Bayhorse Silver Mine


Bayhorse Silver Inc. is commissioning the upgraded silver concentrate circuit at the Bayhorse Silver Mine, Oregon, USA. Milling circuit capacity has been upgraded to process 200 tons per day.

The milling circuit processes the pre-concentrate product from the X Ray Transmissive Ore-Sorter, that reduces the as-mined tonnage by 70%. It consists of a crushing circuit, a regrind circuit, a gravity circuit and a frothing circuit.

Current modifications will provide the Company additional options in the production of silver concentrates, and permit tailoring the silver concentrate into two streams, a higher value silver/copper concentrate, and a lower value zinc/antimony/lead concentrate. Following commissioning this week the circuit will be fully operational producing a minus 100 mesh silver concentrate.

Bayhorse CEO Graeme O’Neill comments, “bringing the upgraded circuit online will allow for a very consistent concentrate, and the ability to create two mineral streams that will lessen the penalties levied for the lower value minerals in the refining stream for the production of pure silver”.

The Company is not basing any decision to produce on a feasibility study of mineral reserves demonstrating economic and technical viability, and also advises there is an increased uncertainty and specific economic and technical risk of failure with any production decision. These risks include, but are not limited to, a drop in price of commodities produced, namely silver, copper, lead and zinc, from the pricing used to make a production decision. Failure of grades of the produced material to fall within the parameters used to make the production decision and increase in mining costs due to changes within the mine during development and mining procedures. There are also metallurgical recovery changes that cannot be anticipated at the time of production.




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