Monument Mining has successfully completed the first trial of the Intec Pilot Plant commissioning program at its Selinsing Gold Project in Malaysia.
Construction of the plant was completed last September and it was then placed into commissioning at Selinsing. The plant was built as a part of the Intec Trial Testing Program to exploit Intec’s sulphide dissolution and gold recovery technology using the existing Selinsing Gold Processing Plant under the interim Intec licence.
During the first trial, the Intec pilot plant was successfully commissioned achieving ‘steady state’ for seven days where various parameters were tested using different sulphide feed stock materials drawn from selected ore samples in the Buffalo Reef and Selinsing Deeps deposits.
The purpose of the pilot run was to demonstrate two main aspects of the process: bench scale batch test work results can be duplicated in a continuous flow process and the process can be successfully scaled-up.
The results of six gold extraction tests on Intec leach residue samples over a set 20 hour leaching time ranged from a head grade of 10.7 grams/tonne (g/t) gold to 12.5 g/t with extraction ranging from 82% to 97%. The average was 11.4 g/t with extraction of 87.7%.
The second trial of the pilot plant commissioning will now commence to test the response of ores containing varying amounts of pyrite and arsenopyrite using sulphide ores from Buffalo Reef and Selinsing Deeps. It will allow the effects on overall gold recovery of sulphide pre-concentration by gravity and flotation methods to be compared.
The second trial is being carried out following recommendations by, and agreement with Orway Mineral Consultants of Perth, Western Australia, who are engaged by Monument to oversee and report on the pilot plant operation.
A drill team has been deployed to the field to collect representative ore samples for the second pilot plant run. Those samples will be concentrated by flotation and fed into the pilot plant for testing.
The results of this second pilot plant run are anticipated to be available in May 2016 for Orway to complete economic analysis of the Intec technology based sulphide gold recovery process. The economic analysis will be incorporated into an updated NI43-101 technical report, targeted for release by June 2016.
In conjunction with the Intec trial test work, Selinsing has commenced flotation work to produce fresh concentrate samples for bench-scale testing ahead of the second pilot plant run.
Monument is an established Canadian gold producer that owns and operates the Selinsing mine in Malaysia. Its experienced management team is committed to growth and is advancing several exploration and development projects including the Mengapur Polymetallic Project, in Pahang State of Malaysia, and the Murchison Gold Projects comprising Burnakura, Gabanintha and Tuckanarra in the Murchison area of Western Australia.