RE:RE:How about this thenJRafflesUK wrote: At what capacity was the sorter testing done for the steinart and tomra? The machine they ordered is a 40 tph machine. The machines are used for various products and can handle that volume (conveyor speed) depending on what they are sorting for, but the question is, what volume per hour did they run them at to get the recuperation they reported for their gold samples? The machine ordered is a Tomra machine. Last year, Novo reported the following stats regarding the Steinert machine traveling at 2.8m /sec, with various tonnes per hour of ore processed.
Presumably, the 2020 Tomra technology machine produces increased sorting speed.
https://www.novoresources.com/news-media/news/display/index.php?content_id=367 Steinert has provided favorable initial guidance on expected productivities of sorting various size fractions of gold-bearing material utilizing mechanical sorters. Productivity estimates include: - Particle sizes 17-50 mm: approximately 280 tonnes per hour
- Particle sizes 6-17 mm: approximately 90 tonnes per hour
- Finer particle sizes including sub-mm: approximately 50 tonnes per hour
Numbers above are estimated based on sorting a loosely packed mono-layer of material scattered across 70% of a 2 m wide conveyor belt moving at a speed of 2.8 m/sec. Sorting of fine material may benefit from use of thinner belts, 3 mm instead of 5 mm, which allows for a higher induction signal and is expected to further reduce the size of gold particles that can be detected.
Useful JK. Thanks.
They mention BC speeds below, but not Egina speeds. 23 tph and 51 tph. Keep in mind the material needs to be picked up, crushed, screened, and fed to tight standard sizes. A very slow process. Add that all up and there is a reason large companies use mills.
- Testing in Sydney was conducted on 2.8 t of crushed (-50 mm) and screened Beatons Creek bulk sample material sieved to two size fractions: +6/-18mm and +18/-50mm.
- Analyses conducted as part of this test work generated a calculated head grade of 4.20 gpt Au for the sample.
- Testing was conducted at near expected production rates for this material, with the +18/-50mm size fraction tested at 51 tph and +6/-18mm size fraction tested at 23 tph. An impressive 94% of gold was recovered in 43% of the mass of the +18/-50 mm fraction and 82% of gold was recovered in 37% of the mass of the +6/-18 mm fraction.
- To better test recovery of the +0/-6MM size fraction, bulk material was delivered to Tomra's laboratory in Wedel, Germany for testing on a new prototype fines sorting machine (please refer to "Wedel, Germany" summary herein).
LF