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copper ore processing plant a complete feasibility study

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middle island edges closer to feasibility study at

The pieces are coming together for ASX-listed Middle Island Resources with positive developments from its ongoing feasibility study aimed at bringing the company’s wholly owned Sandstone gold processing plant back to life

Located in the Goldfields, the processing plant at Sandstone was constructed in 1994 with a capacity of 250,000 tonnes of ore per annum. It was upgraded to a 600,000-tonne capacity in 1999 and operated through to 2010 before being mothballed by prior owners

The ongoing feasibility study to recommission the plant and the scoping study on expanding the feed to 750,000 tonnes of ore per annum, could be transformational for Middle Island. The two studies are due for release in the coming weeks and will no doubt be highly anticipated by the market

middle island edges closer to feasibility study at

Final contract mining costs have now been received and can be incorporated into the feasibility study. Technical work such as pit geotechnics, water supply, tailings storage, metallurgy and environmental aspects of the project has now been concluded without any material issues according to the company

Middle Island is initially planning to grow the mineral resources within the company’s 100 per cent owned concessions before generating ore for the plant from third parties within economic trucking distance of the project

pre-feasibility study - metallurgy & processing

The process design for the Rupice and Veovaca project is based on the mine plan and corresponding feed grades, metallurgical test-work, and Ausenco’s in house database. The Rupice and Veovaca mineralisations are amenable to concentration through sequential flotation circuits producing saleable bulk (copper-lead), zinc, pyrite, and barite concentrates. The plant has been designed to accept a maximum throughput of 800 kt/y

The main processing facility is located at the Veovaca site and receives ore from both the Rupice underground mine and Veovaca open pit. During underground operation, primary jaw crushing occurs at the Rupice site and the crushed ore is trucked to the Veovaca concentrator. For open pit operations, a contracted crusher will be used for the Veovaca site and ROM will be trucked there directly. Crushed ore is received and stored in two coarse ore bins prior to the Semi-Autogeneous Mill and Ball mill (SAB) grinding circuit, which consists of a Semi-Autogenous Grinding (SAG) mill, ball mill, and cyclone to grind and classify material to a P80 of 40 µm

The cyclone overflow reports to the sequential flotation circuit, which consists of bulk (silver-lead) flotation and regrinding, zinc flotation and regrinding, pyrite flotation, and barite flotation. The process produces four saleable concentrates, (bulk, zinc, pyrite and barite), that are subsequently thickened, filtered, and placed in sealed shipping containers for transport

Tailings from the facility reports to a tailings thickener and filter press where the material is dewatered to produce filtered tailings, and the resulting process water is recycled to the facility. This arrangement results in a high-water efficiency, minimising makeup water requirements. The filtered tailings are then trucked to the Rupice site for use as backfill in the underground mine or trucked and placed at the tailings storage facility located near the Veovaca concentrator

pre-feasibility study - metallurgy & processing

Filtered tailings which report to the Rupice site are stockpiled next to the backfill plant. Waste rock from the underground mine is crushed and mixed with the tailings and cement binder in the backfill mixing system. The paste backfill is then pumped to the underground reticulation system

The Rupice site is a greenfield location and consists of several terraces accommodating the portal access to the twin declines, the primary jaw crusher, and stockpiles required for management of ore and waste rock. The aggregate crushing plant, paste backfill plant and the associated stockpiles and ancillary facilities are located near the underground portal at the site

kamoa-kakula copper mines 339,000 tonnes of ore grading 5

Volume of ore from underground mining now exceeding steady-state monthly requirements of the Phase 1, 3.8-Mtpa concentrator Pre-production ore stockpiles now hold 2.16 million tonnes grading 4.44% copper, containing more than 95,000 tonnes of copperMajor conveyor belt changeover to permanent configuration completed in February, with underground ore now directly delivered to the surface stockpile Overall progress of …

Overall progress of Kamoa-Kakula’s first phase, 3.8-Mtpa mining and milling operation now 78% complete; initial commissioning underway at the concentrator and first copper production on track for July 2021

Kolwezi, Democratic Republic of Congo–(Newsfile Corp. – March 1, 2021) – Ivanhoe Mines (TSX: IVN) (OTCQX: IVPAF) Co-Chairs Robert Friedland and Yufeng “Miles” Sun are pleased to announce that underground ore production at the Kamoa-Kakula Copper Project in the Democratic Republic of Congo (DRC) has for the first time exceeded the steady-state requirements of the Phase 1, 3.8-million-tonne-per-annum (Mtpa) concentrator plant. In February, the project mined and stockpiled 339,000 tonnes of ore grading 5.50% copper from the Kakula and Kansoko mines. The tonnage was 13% higher than January, while the copper grade continued to trend higher.

The new production record in February was achieved even with undertaking the scheduled conveyor belt changeover to the permanent configuration at the Kakula Mine, which limited underground ore haulage for one week.

kamoa-kakula copper mines 339,000 tonnes of ore grading 5

The 339,000 tonnes mined in February include 47,300 tonnes grading 4.62% copper from the Kansoko Mine, establishing a new monthly production record at Kansoko. The total tonnage mined also includes 107,000 tonnes grading 9.01% copper from the high-grade centre of the Kakula Mine.

The project’s pre-production surface stockpiles now contain approximately 2.16 million tonnes of high-grade and medium-grade ore at an estimated blended average of 4.44% copper. Contained copper in the stockpiles increased by approximately 19,000 tonnes in February – a 19.2% increase over January’s production – to a cumulative total of more than 95,000 tonnes (the current copper price is approximately US$9,100 a tonne).

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