Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Longhole open stoping
- Transverse stoping
- Pillar mining
- Cemented (undefined) backfill
|
Production Start | ... |
Mine Life | 2026 |
Kayad Mine (KD) is an underground mine producing zinc and lead concentrates.
During 2022-2023, the commencement of mining in new production centre at block-S1.
Ore produced from the mine is transported to Rampura Agucha Mill for beneficiation. |
Source:
p. 13,179,277
Vedanta Limited, an India-listed susidiary of Vedanta Resources Limited, owns the share capital of Hindustan Zinc Limited, while the Government of India remains an equity partner and holds a 29.5% stake.
Zinc India business is owned and operated by Hindustan Zinc Limited.
Contractors
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Summary:
The deposit forms part of the pre-Aravalli Gneissic Complex. This consists of gneisses, schists and intrusive acidic and basic igneous rocks that occupy predominantly the south-eastern plains of Ajmer and Bhilwara. The rock units show NE-SW strike with steep dips in the hanging wall (750-800) and moderate dips in the footwall (600-650) towards the south-east and plunges NNE. The sequence of rocks, from hanging wall to footwall, can be broadly grouped as:
• Garnet-biotite-sillimanite gneiss with intermittent bands of calc-granulites, amphibolites and aplites or pegmatites.
• Garnet-mica-sillimanite gneiss/schist.
• Garnet-biotite-sillimanite gneiss with lenses of quartzo-feldspathic bands, amphibolites, pegmatites and aplites.
• Granite gneiss
• Mylonitic rocks.
Economic mineralization is predominantly in graphite-mica-sillimanite schist over the strike length of 1,550m. The ore zone has a sharp contact with the hanging wall and footwall. The hanging wall side of the lode is the richest and widest, followed by comparatively lean grade in the middle and a narrow, rich, footwall zone. Coarse grained crystalline galena, associated with pyrite and pyrrhotite is noted in the hanging wall rocks. The mineralization in the hanging wall and footwall contacts is invariably fine to coarse grained and is made up of sphalerite and galena with numerous inclusions or rounded to sub-rounded discrete grains of feldspar, quartz, hornblende, sillimanite a ........
Mining Methods
- Longhole open stoping
- Transverse stoping
- Pillar mining
- Cemented (undefined) backfill
Summary:
Mining Method : Long hole open stoping with CRF.
The initial box cut excavation for decline portal was made on 11.06.2011 at 487.6 mRL. The decline portal starts at 467 mRL. The mine access is comprised of single decline from surface portal to the top of the orebody, at the 419 mRL where it then splits into separate North and South declines. North & South Declines are connected at multiple levels. North Decline further splits into two declines at 190mRL, where one decline reach to central part and another reach to northern part of the orebody. All three declines are accessible from 180mRL FWD. Decline access is best suited for the shallow depth of Kayad deposit, proposed high mechanization for the planned production capacity. It posed easy transport of man & material and ventilation intake to mine. Secondary access to mine is maintained through shaft & cage winder from surface 487 mRL to 400 mRL, which connects to decline at 400 mRL.
The upper & K18, steep dipping section of the orebody is accessed via a central level access from each decline which connects to longitudinal (along strike) north and south ore drives. Stopes are mined in a retreat sequence back to the central access. The lower, flat lying section of the orebody is accessed via footwall drives developed north and south from the decline accesses, along the strike extent of the orebody. Transverse drives provide access to the stopes from the footwall drives. Longitudinal Long hole open stoping ........
Flow Sheet:
The ore received from Kayad Mine is separately treated in one of the streams.
Beneficiation plant comprises of crushing, grinding & classification, differential floatation, concentrate dewatering & tailing disposal.
Crushing
The runoff mine ore is crushed in 2 no’s independent primary gyratory crusher on surface and 2 nos. jaw crusher in UG mines from 1000 mm to 90% minus 150 mm and is transferred to coarse ore stockpile.
There are four coarse ore stockpiles. Ore from old coarse ore stockpile is crushed in standard cone crusher (secondary crushing) to 100% minus 50mm. Further the ore is crushed in short head cone crushers (tertiary crushing) to minus 19 mm. The fine product (minus 19 mm) is stored in fine ore bins. Ore from 3 new coarse ore stockpiles is directly fed to SAG Mills in stream-2, stream-3 and stream-4. Stream -4 is the new Stream and was commissioned on 16th Feb 2010 which has the same capacity as Stream - 2 i.e. 4650TPD. Stream -4 has the same SAG Mill, Ball Mill combination for grinding.
Grinding & Classification
There are four streams. In Stream-1 closed circuit wet grinding is arranged in three parallel circuits of rod and ball mill combination of 2250 TPD each for flexible in operation and maintenance. The mill discharge goes to hydro cyclones for 2-stage classification. The pulp of 80% minus 63 microns goes to the lead conditioner. In Stream 2 and Stream-3 SAG Mill replaces the entire fine crushing circuit and rod mill. Stream 2 and 4 has a capacity of 4650 TPD each and Stream 3 has a capacity of 3250 TPD. In Stream- 2, Stream -3 and Stream- 4, the SAG Mill and Ball Mill discharge goes to hydro cyclone for 2- stage classification. Final product of classification has fines of 80% passing 63 microns.
Flow Sheet:
Summary:
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Source:
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Reserves at March 31, 2023:
Category | Tonnage | Commodity | Grade |
Proven & Probable
|
1.5 Mt
|
Zinc
|
5.2 %
|
Proven & Probable
|
1.5 Mt
|
Lead
|
0.9 %
|
Proven & Probable
|
1.5 Mt
|
Silver
|
15 g/t
|
Measured & Indicated
|
3 Mt
|
Zinc
|
9.7 %
|
Measured & Indicated
|
3 Mt
|
Lead
|
1.4 %
|
Measured & Indicated
|
3 Mt
|
Silver
|
25 g/t
|
Inferred
|
3 Mt
|
Zinc
|
6 %
|
Inferred
|
3 Mt
|
Lead
|
0.6 %
|
Inferred
|
3 Mt
|
Silver
|
9 g/t
|
Corporate Filings & Presentations:
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