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Spanish Mountain Gold Announces Confirmation of Metallurgical Results
Vancouver, British Columbia--(Newsfile Corp. - August 12, 2019) - Spanish Mountain Gold Ltd. ...
About this update from Spanish Mountain Gold Ltd.
[{"type":"text","content":"Spanish Mountain Gold Announces Confirmation of Metallurgical ResultsVancouver, British Columbia--(Newsfile Corp. - August 12, 2019) - Spanish Mountain Gold Ltd. (TSXV: SPA) (the \"Company\") is pleased to announce the results of the metallurgical program for the Spanish Mountain Gold Project (the \"Project\") located in central British Columbia, Canada. As previously reported in a news release dated March 13, 2019, the metallurgical program was completed at McClelland Laboratories Inc. under the direction of Mr. Daniel Sepulveda, SME-RM. The program incorporated confirmation of the power requirements for crushing and grinding, flotation parameters and cyanidation of the flotation concentrate.Key Findings:Low power consumption for crushing and grinding of mill feed indicatedSimplified process flowsheet (as announced on January 31, 2017) used in previous metallurgical test affirmedOverall gold recovery confirmed to be 91% vs 90% assumed in 2017 PEALower cyanide consumption than in previous test programs observedPower requirements for crushing and grinding are in agreement with previous results that showed the deposit to exhibit low power requirements for comminution. The average crusher work index for all samples tested was 9.5 kWh/t and the average ball mill work index was 12.2 kWh/t. Together with a relatively coarse primary grind of 180 microns, these results are indicative of a low power consumption for crushing and grinding.Following grinding, the process flowsheet incorporates conventional bulk flotation including rougher flotation followed by two stages of cleaning to produce a gold-bearing sulphide concentrate representing about 3.5% of the fresh feed weight. This concentrate is reground prior to gold extraction by CIL cyanidation. The flotation cleaner tailings are scavenged by means of gravity concentration with the gravity concentrate being added to the flotation concentrate for subsequent gold extraction.Flotation testing of the two composites identified in the March 13 news release confirmed an average gold recovery of 92% to the combined cleaner flotation concentrate and scavenger gravity concentrate. Cyanidation of the reground concentrate prepared from a bulk flotation test using a composite from the two individual composite samples resulted in a gold extraction from the concentrate of 99%. The flowsheet's overall...