Mr. Antonio Berlanga reports
PROCESS TESTING SHOWS INCREASE IN MILL THROUGHPUT AVAILABLE AT CAMPO MORADO
Telson Mining Corp. has released positive testing results for increasing the
SAG (semi-autogenous grinding) mill throughput processing rate by at least 15 per cent by reducing the size
of crushed mill feed.
During four hours of testing 382 tonnes were milled at 80 per cent minus two inches
obtaining an average processing rate of 95.5 tonnes/hour (equivalent
to 2,292 tonnes/day).
Testing at 80 per cent minus two inches achieved approximately 15-per-cent increase over
processing 100 per cent minus-five-inch feed.
Projected tonnes/day Zn % Zn %
Time Tonnes/hour (24 hours) head concentrate
7 a.m. to 8 a.m. 84 2,016 4.5 47
8 a.m. to 9 a.m. 95 2,280 4.5 47
9 a.m. to 10 a.m. 97 2,328 4.5 47
10 a.m. to 11 a.m. 98 2,352 4.5 47
11 a.m. to 12 p.m. 92 2,208 4.5 47
12 p.m. to 1 p.m. 82 1,968 4.5 47
1 p.m. to 2 p.m. 79 1,896 4.5 47
Testing commenced at 8 a.m. and ended at 12 p.m. when no more
mineral was available at a size less than minus two inches. The current design
of the mills crushing circuit allows a minimum size of minus five inches to be
processed. Based upon Antonio Berlanga, chief executive officer, and mining engineer's
experience in other mining operations working with similar milling
circuits, a significant increase in production can be achieved by
reducing the size of crushed mineral mill feed. The successful testing
just completed at Campo Morado was designed to confirm if this technique
could produce similar production increases. Of note is that the
available minus-two-inch mill feed was limited such that a maximum of 80 per cent at minus two
inches was processed over a four-hour period.
Mr. Berlanga stated: "As director of La Negra mine, I was
responsible for increasing the mines processing rate by up to 37 per cent by
reducing the mill ore feed from a traditional minus three-eighths inches to minus one-eighth inch. As one can see from our Campo Morado test results, feeding
smaller material to the SAG mill increased the milling capacity up to
15 per cent, showing clearly that by feeding a smaller size to the SAG mill it
is possible to increase its grinding capacity. Testing also showed that
the efficiency of other stages in the milling process (vertical mill
(Vertimill), flotation cells, thickeners and filters) were not affected
by the higher throughput volume as zinc recoveries and quality of the Zn
concentrate at 47 per cent Zn were maintained, showing that the mill worked
smoothly at increased capacity."
With Telson's just-completed positive testing to verify if this
technique was applicable at Campo Morado, Telson now intends to modify
its crushing circuit to produce a consistent minus-two-inch feed and upgrade
the pumping system to allow effective movement of the increased volumes
in order to increase mill throughput and productivity while maintaining
excellent zinc concentrate grades. Management anticipates that with a
consistent 100-per-cent minus-two-inch mill feed, the company can achieve mill throughput
processing rates in excess of the average 96 tonnes per hour (equivalent
to 2,300 tonnes per day) achieved over four hours in the above testing.
About Telson Mining Corp.
Telson is a Canada-based mining company with two Mexican gold, silver and base metal mining projects. Effective May 15, 2018, Telson declared commercial production at its 100-per-cent-owned Campo Morado mine. Telson is currently producing zinc and lead concentrates with gold, silver and copper as byproducts.
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