ZMI test work delivers outstanding grades

By Trevor Hoey. Published at Apr 23, 2019, in Mining

Zinc of Ireland NL (ASX:ZMI) has released impressive results relating to preliminary metallurgical test work conducted at its Kildare Project in Ireland.

The preliminary round of testing was designed to support the ongoing assessment of the economic potential of the Kildare Project in conjunction with the other parallel resource and development studies taking place in 2019.

The positive results demonstrated the potential for the project to produce high-quality, marketable zinc and lead concentrates.

These included a 96% recovery of zinc to concentrate and an 86% recovery of lead to concentrate.

Importantly, no deletrious elements (impurities that negatively impact the economic value of the processed product) were present in either concentrate.

ZMI used a standard reagent scheme involving minimal energy costs, an important factor in terms of underlining management’s anticipated progression in presenting an economical viable production case.

As indicated below, the Kildare Project incorporates a number of target zones in a region that has a rich history of being home to high grade long life zinc and lead mines.

Test completed on ore from McGregor zone

The test work program was completed by Grinding Solutions Ltd. (UK) under the supervision of ZMI’s metallurgical consultant.

The representative sample comprised a composite sample of approximately 50 kilograms of diamond drill core taken from the main zone of base of reef massive sulfide at McGregor with a head grade of 10% zinc and 1.8% lead.

Although these preliminary test results are indicative, it is expected that process refinements, including a basic process flow sheet, will lead to maximising the grade and recovery in future test work.

Both the zinc and lead concentrates show only very low levels of potentially deleterious elements and therefore should be viewed as ‘clean’ and as such, should attract premium payment from potential buyers.

Additional metallurgical test work to support more detailed analysis and assessment will be initiated following the upcoming drilling campaign and as part of the ongoing assessment of the project economics.

Targeting high grade zinc similar to McGregor

In underlining the better than expected results from the test work, ZMI’s executive director Patrick Corr said, “These preliminary test work results have exceeded our expectations, even given that Irish-type zinc projects, such as Kildare, are renowned for their outstanding metallurgical performance.

“Simple grinding, excellent recoveries and high grades in clean concentrates is about as good as you can get from such a standard test work program.

“We believe minor improvements are still possible via straightforward optimization testwork and study.

“This is a timely confidence building step for the Kildare Project as our focus shifts to our upcoming drilling campaign within the Allenwood Graben.

The first phase of the program is designed to target areas with the potential to host significant zones of high-grade zinc mineralisation similar to that at McGregor.”

ZMI has planned a comprehensive and staged exploration program in the Allenwood Graben during 2019 that will be aimed at resource addition at Shamrock as well as McGregor, a potential share price catalyst.

Management will also be testing outer lying areas in a program that will include approximately 7500 metres of diamond drilling.

ZMI is fully funded complete its exploration program.

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