There’s a battle rising between the pattern to decrease grade ores and the pattern towards extra efficiencies from mineral processing. Degrading ores want extra processing, with extra vitality and gear getting used.
Glencore Know-how, which develops, markets and helps know-how that delivers flowsheet enhancements, has created a brand new concentrator which helps remedy this battle, writes CHANTELLE KOTZE.
The nice grinding IsaMill and Jameson Cell flotation applied sciences, which had been initially developed at Glencore’s mining websites, have undergone important change and enhancements through the years as they cut back plant footprint, save water and vitality and enhance mineral grade and restoration. The result’s a serious evolution from typical concentrator circuits.
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Talking throughout a webcast, Glenn Stieper, supervisor for mineral processing at Glencore Know-how, detailed how the brand new and optimised concentrator design, utilizing the trademarked IsaMill and Jameson Cell applied sciences, might dramatically cut back footprint, enhance efficiency and reduce CAPEX and OPEX bills.
The best know-how for the job
Stieper introduced that Glencore Know-how has been awarded a contract to put in its new concentrator on the the Ozernoye polymetallic venture in Buryatia, Russia. The lead/zinc concentrator will, from its 2023 commissioning, course of 875 tph from a circuit comprising new high-throughput Jameson Cells and newly launched M20,000 IsaMill.
“The entire flotation circuit can be half the footprint of typical know-how and can want about half the vitality,” Stieper factors out, noting that the 19 Jameson Cells throughout the optimised concentrator, substitute 63 typical tank cells, whereas three M20,000 IsaMill with 5 MW motors can even be put in.
Ozernoye’s mineralogy is complicated and requires the fitting flowsheet to enhance the restoration and focus high quality to make sure the financial viability of the venture. Its mineralogy is remarkably much like Glencore’s McArthur River zinc-lead-silver mine in Norther Australia. It’s that operation that initially led to the necessity to create the IsaMill ultrafine grinding know-how to attain the required grind measurement to liberate the zinc.
In the meantime, mixed with the Jameson Cell – a high-intensity froth flotation cell that mixes intense mixing with small bubbles reaching speedy flotation with out mechanical agitation – extra worth might be created from decrease grade ore and sulphides.
“In a world progressively shifting towards decrease grades and better throughputs, this concentrator circuit may very well be a recreation changer,” says Stieper, not solely at Ozernoye however any operation with complicated base metallic mineralogy.
Iterating this, Alexandr Kanarskiy, chief metallurgist at Ozernoye mentioned that as a result of depletion of high-grade mineral assets and the tendency in the direction of reducing the scale of the dear element within the preliminary ore, the processing flowsheet at Ozernoye will seemingly turn into the benchmark within the area of complicated finely disseminated ore enrichment throughout the globe.
The flotation complicated is predicted to be delivered to website throughout Q1 to Q2, 2022, set up needs to be accomplished round early-2023, with full plant commissioning scheduled for Q2, 2023.
In the meantime, base and valuable metals miner Hudbay Minerals is refurbishing its New Britannia mine in northern Manitoba, Canada, and has chosen to create a brand new flotation circuit made solely of Jameson Cell flotation cells, to course of ore from the Lalor mine, which incorporates copper, zinc, gold and silver.
The 70 tph flotation circuit will use 4 Jameson Cell flotation cells, (in contrast with 11 typical cells) – a call that was pushed by the realities of the Lalor ore physique and need to scale back prices and footprint and enhance web worth.
Matthew Taylor, metallurgy supervisor at Hudbay Minerals, says that the corporate selected Jameson Cell know-how for its means to deal with various swings within the head grade, for its vary in carrying capability and its means to clean inside every cell. “These components will permit us flexibility to supply both a closing focus from the rougher feed throughout the first cell or allow us to ship the rougher tail to a cleaner circuit for additional improve, relying on the top grade, says Taylor, noting that the Jameson Cell can be utilized in rougher, scavengers and cleaner flotation.
Though usually deployed within the cleaner levels of a processing plant, Taylor believes that Jameson Cell know-how might discover future functions throughout the rougher stage of mineral processing and doubtlessly even overtake mechanical cells on this software. Jameson Cells might also be appropriate for circuits for metals that it has not historically been utilized in, akin to copper and molybdenum separation. On the similar time, he felt the IsaMill could discover software nearer to the top of the flowsheet – to the place the majority of the supplies dealing with is happening, with the potential of displacing ball mills in sure functions the place possible.
Set up at New Britannia is at present in progress and the flotation circuit is due for commissioning in This fall, 2021.