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Further Metallurgical Test Work at Gubong
Further Metallurgical Test Work at Gubong.
About this update from Bluebird Mining Ventures Ltd.
[{"type":"text","content":"\n \nRNS Number : 0346S Bluebird Merchant Ventures Limited 21 June 2018 \n\n21 June 2018\nBluebird Merchant Ventures Ltd\n(the \"Company\" or \"Bluebird\")\nFurther Metallurgical Test Work on Gubong Ore Sample Yields Excellent Results\nBluebird Merchant Ventures (EPIC: BMV), the Asian focused resource development group is pleased to announce results relating to ongoing metallurgical test work conducted on an ore sample from Adit 4 at the Gubong mine. \nHighlights:\n· Excellent results from vat leach metallurgical test work\n· Recoveries of over 90% of the gold using conventional and alternative lixiviants\n· Vastly improved gravity recovery possible\n· Reduced operating and capital costs of future processing plant\nAdditional test work carried out on the Gubong oxide sample using a simple process known as vat leaching yielded recoveries more than 90% (up to 97%). Vat leaching is a well-known and cost-effective processing route, whereby crushed or uncrushed ore is placed in a series of containments known as vats and irrigated with a solution to recover the desired metal into solution. The process may be highly mechanised, reducing the cost of labour and as there is no requirement for milling (reduction of ore in size to a powder), greatly reducing power consumption. \n \nAs the leached and washed ore is of coarse size, it may be readily used as a back-filling material or sold as aggregate.\n \nAdditional test work using enhanced gravity separation have yielded gold recoveries of around 70% into 3% of the mass. Simply put, this means that using just a gravity process on 100 tons of ore, 70% of the gold can be captured in just 3 tons of concentrate. The remaining 30% of gold in 97 tons can be stockpiled for later processing. Additional test work will be conducted to further optimise gravity recovery as a potential processing route.\n \nA sample of Gubong tailings (material that has been processed during previous operations), has been received and is being subjected to preliminary diagnostic tests. Results to date indicate recoveries of over 90% are possible from a head grade of 1.1 g/t gold. Reprocessing of old tailings albeit at lower grade than mined ore, is cost effe...