Overview
Stage | Production |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Cut & Fill
- Shrinkage stoping
- Sub-level caving
- Blast Hole Stoping
- Drift & Fill
- Room-and-pillar
- Truck & Shovel / Loader
|
Production Start | ... |
Mine Life | 2032 |
The East Region and Bozymchak operations are shown as one operating segment consisting of Vostoktsvetmet LLC (East Region), whose principal activity is the mining and processing of copper and other metals which are produced as by-products from three underground mines and the associated concentrators located in the eastern region of Kazakhstan and KAZ Minerals Bozymchak LLC (Bozymchak) a copper-gold open pit mine and concentrator located in western Kyrgyzstan. Bozymchak is combined with the East Region operations, given the similarity of their economic characteristics and concentrate production processes; and as their combined output is toll processed at the Balkhash smelter and subsequently sold to the Group’s customers. |
Source:
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KAZ Minerals has been wholly acquired by Nova Resources BV to support the Company’s pursuit of a capital-intensive strategy focused on long-term growth.
KAZ Minerals Limited is a high growth copper company focused on large scale, low cost, open pit mining in Kazakhstan. It operates the Aktogay and Bozshakol open pit copper mines in the Abay and Pavlodar regions of Kazakhstan, three underground mines and associated concentrators in the Abay and East regions of Kazakhstan and the Bozymchak copper-gold mine in Kyrgyzstan.
Vostoktsvetmet and KAZ Minerals Bozymchak LLC are wholly-owned subsidiaries of KAZ Minerals.
Contractors
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Summary:
Most of the deposits of the East Region are of the volcanogenic massive sulphide (VMS): Orlovsky, Artemyevsky, Irtyshsky underground mines.
Orlovsky is an active underground mine exploiting a large, polymetallic, high grade, and gold rich VMS deposit. It comprises the Main Orebody, which comprises an upper and lower part with an irregular pod-like shape, 20° to 30° dip to the SW, average thickness of 35m and down-dip extent of 600 m. It is now almost worked out, with the remaining resources consisting of remnant blocks distributed in the lower part of the orebody and representing some 25% of the whole deposit. A 0.85 Mt oxidised cap on the upper part of the orebody has been excluded from the resources since until now, no technology has been successfully developed to treat it.
350 m to the SW of the lower part of the Main Orebody is the New Orebody comprising a southern portion with a 10° to 15° dip to the SW and thickness of up to 56m and a northern portion with very high grade and thickness of 5-20 m. The combined New Orebody occupies a surface area in long section of some 250 m by 150 m and accounts for the rest of the resources in the deposit.
Artemyevsky is an operating underground mine exploiting a larg, high grade, polymetallic, gold and silver-rich VMS deposit. A number of different steeply dipping ore bodies have been identified in the deposit, the most important of which is the Main Orebody, with a strike length of 1,300 m and max ........
Mining Methods
- Cut & Fill
- Shrinkage stoping
- Sub-level caving
- Blast Hole Stoping
- Drift & Fill
- Room-and-pillar
- Truck & Shovel / Loader
Summary:
The East Region Operation comprise three underground mines employing cut and fill mining (Artemyevsky), shrinkage stoping and sub-level caving mining (Irtyshsky), blast hole stoping (Artemyevsky), room-and-pillar (Irtyshsky), drift & fill (Orlovsky).
Artemyevsky
Access to the mine is through three vertical shafts and an adit from the mined-out Kamishinskaya Open Pit. Ore production is by drilling and blasting roadways 4 x 4 m or 15 x 10 m stopes with length varying up to 50 m. Monomatic drill from Finland are used for horizontal drilling and Atlas Copco Simba drills for Vertical fan drilling.
Blasted ore is loaded and hauled to an ore pass using TORO LHD with 3.2 m3 buckets. The ore passes are equipped with the grizzley bars and hydraulic rock breakers. The sized ore goes to the underground storage bunkers via a conveyor system and is loaded into 20 t EJC underground dumps trucks and transported to the surface stockpile. Another ore stream goes to the underground crusher for hoisting to the surface via an 8 m dia. shaft. 42 t Belaz trucks haul the ore from the shaft bunkers to an adiacent surface stockpile. From the stockpile ore is transported to the Nikolaevsky Concentrator by trucks. A part of this ore goes to the third party concentrator.
The mine utilizes mechanized blasthole stoping and cut and fill mining methods.
Irtyshsky
Labour intensive shrinkage stoping is used with high ore dilution (32%). Some sublevel ca ........
Source:
Bozymchak
The selected plant design is conventional and generally well considered. Ore is delivered by truck or front and loader to fixed grizzly above a bunker that is discharged by an apron feeder that feeds a vibrating grizzly from which the oversize feed the TST 1200 primary jaw crusher. Vibrating grizzly undersize and the primary crushed product is conveyed to a vibrating screen from which the oversize discharges into the sarge bin ahead of the secondary crusher. A belt feeder under the sarge bin feeds the XL 300 secondary coner crusher and the vibrating screen undersize joins the secondary crushed product and the tertiary crushed product on a conveyor to another vibrating screen. The oversize from the second vibrating screen is conveyed back to the two XL 300 tertiary cone crushers. The second vibrating screen undersize at 80% passing 7.7 mm, is conveyed to a 50 m diameter stockpile. This provides ore for the mill for 72 hours to allow time for repair and relining of the crushers.
Fine ore is drawn by apron feeders under the stockpile to two parallel conveyors, each feeding a 3.7 m diameter, 7.2 m long ball mill with a 1600 kW motor at about 65 tph.
Nikolayevsky concentrator
Ore from the Artemyevsky mine is processed the Nikolayevsky concentrator.
Ore is received in the feed storage building and tipped in the primary crusher and reduced down to less than 300mm. Crushed ore is fed separately to two SAG mill, 7 m by 2.3 m with a design capacity of 95 tph, actual thoughput of 100 tph and the maximum capacity is 130 tph. The increase in capacity to the design capacity was achieved by the introduction of rubber liners to the mill and the addition 100 mm steel balls.
Each SAG mill feeds two ball mills (3.6 by 4 m) which are in series with closed circuit classification cyclones. Output from the secondary ball mills is fed to a common tertiary ball mill (4.5 by 5 m) in closed circuit with cyclones. Cyclone overflow is fed to the copper flotation circuit.
Orlovsky concentrator
There is no crusher at the plant of the ROM ore is fed directly to the primary autogenuos (AG) mill (7 m by 2.5 m) at approximately 190 t/h. Two AG mills are operated in parallel with a thre stage system.
Feed size to the AG -400 mm and the outlet screen of the AG mill cuts off at 5 mm and oversize is fed back into the AG mill. The undersize goes to spiral classifiers where the oversize from the spirals is fed into the second stage ball mill operated in close circuit with a bank of hydrocyclones. The undersize from the spiral goes directly to the bank of hydrocyclones. The undersize from the cyclones is fed to copper flotation and the oversize is fed back into the second stage ball mill (4.5 m by 6 m). The ball mill with a size of 4.5 m by 6 m is charged with 60 mm steel balls.
The copper flotation is a multistage process involving some regrinding in the third stage ball mills after the first flotation.
Source:
Summary:
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Reserves at December 31, 2021:
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade |
Proven & Probable
|
37.9 Mt
|
Copper
|
1.73 %
|
Proven & Probable
|
27.8 Mt
|
Zinc
|
3.41 %
|
Proven & Probable
|
37.9 Mt
|
Gold
|
0.92 g/t
|
Proven & Probable
|
37.9 Mt
|
Silver
|
52.8 g/t
|
Proven & Probable
|
27.8 Mt
|
Lead
|
1 %
|
Measured & Indicated
|
38.9 Mt
|
Copper
|
1.87 %
|
Measured & Indicated
|
26.8 Mt
|
Zinc
|
4.1 %
|
Measured & Indicated
|
38.9 Mt
|
Gold
|
1.06 g/t
|
Measured & Indicated
|
38.9 Mt
|
Silver
|
57.9 g/t
|
Measured & Indicated
|
26.8 Mt
|
Lead
|
1.15 %
|
Corporate Filings & Presentations:
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