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South Africa
Mine Waste Solutions

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 Location:
77 Km SW from Carletonville, South Africa

  Address:
3 Stilfontein Rd
Stilfontein
South Africa
2551
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  • Overview
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Overview

StageProduction
Mine TypeTailings
Commodities
  • Gold
  • Uranium
Mining Method
  • Truck & Shovel / Loader
  • Hydraulic mining
Production Start...
Mine Life17 years (as of Jan 1, 2022)
Mine Waste Solutions (MWS) is a reclamation operation in the Stilfontein/Orkney area treating 2.2 million tonnes per month from historical tailings facilities through the MWS plant. The residue is deposited on the existing Kareerand Tailings Storage Facility (TSF). Kareerand TSF is a cyclone facility on a 560ha footprint and based on the current production plan will reach its authorised height of 80 metres in 2025. The existing Kareerand TSF was sized to receive the reprocessed tailings from the MWS sources. The project progressed through feasibility study and detailed design.


Owners

Source: p. 250
CompanyInterestOwnership
Harmony Gold Mining Company Ltd. 100 % Indirect
The operation was acquired from AngloGold Ashanti Limited in October 2020. Harmony’s subsidiary, Chemwes, the owner of Mine Waste Solutions.

Contractors

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Deposit Type

  • Tailings


Summary:

Material contained in the Tailings Storage Facilitys (TSF) and Waste Rock Dumps (WRD) predominantly originates from deep level gold mines, operated by Harmony and others, mostly located in Klerksdorp and Carletonville. The West Wits mining operations predominantly extract tabular goldbearing conglomeratic reefs, namely the Carbon Leader Reef (CLR) and Ventersdorp Contact Reef (VCR). The Mine Waste Solutions (MWS) Operation, however, mainly exploits TSFs and WRD derived from the VR. The Witwatersrand reefs occur within the Archean Witwatersrand Basin which hosts the Witwatersrand Supergroup succession. The VCR horizon is located at the top of the Turffontein Subgroup of the Central Rand Group (CRG), capping the Witwatersrand Supergroup. The Vaal Reef (VR) horizon is situated within the Krugersdorp Formation, in the Johannesburg Subgroup of the CRG. The CLR is situated near the base of the Johannesburg Subgroup. The TSF material comprises previously treated residues of gold-bearing conglomeratic reefs processed by CIL. They are man-made “deposits” and are not the result of natural sedimentary processes. The grade of the TSFs is determined by the grade of the ore source at the time that they were processed, and the processing efficiency. The WRDs are unconsolidated and are comprised of untreated, low grade, gold-bearing material from underground workings. The WRDs are also man-made deposits, with very little structure or continuity, and one in which the grade does not behave ........


Mining Methods

  • Truck & Shovel / Loader
  • Hydraulic mining


Summary:

The mining methodologies adopted at Mine Waste Solutions entail the hydro-mining of the TSFs and reclamation of WRDs using FELs. The TSF material is reclaimed using several hydraulic monitoring guns which deliver high-pressure water to the face. High pressure water is transferred to the monitoring guns observing the maximum design capacity of the equipment, limited to 40 bars (“b”). The tailings are reclaimed using several hydraulic (high-pressure water) monitoring guns to deliver water at pressure, typically 27-30 bar, to the face. The tailings material is reclaimed by blasting the TSF face with the high-pressure water, resulting in the slurry gravitating towards pumping stations. These monitoring guns can be positioned to selectively reclaim required areas from the TSFs. Bench heights are constrained by the force delivered from the monitoring gun nozzle and safety constraints. With enough pressure, face advance of up to 25m can be reclaimed per cut. Typical bench heights are between 10 and 15 metres. The pump stations are located at the lowest point of the dams to ensure that the slurry from the dams will gravitate towards the pump station from where the slurry will be pumped to the processing plants. The tailings material can be selectively mined based on the positioning of the monitoring guns. The TSF face is broken by the water pressure, resulting in the slurry gravitating towards the collection sumps that deliver the slurry to the pumping stations, which is then pu ........


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Production:
Production in 2021 for nine months from October 2020 to June 2021

CommodityUnits2023202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required171192
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021201920182017
Tonnes processed  ......  Subscription required  ......  Subscription required33.8 Mt33.5 Mt35.8 Mt
Daily processing capacity  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2022:
Mine Waste Solutions 2022 cut-off 0.23 g/t.

CategoryTonnage CommodityGradeContained Metal
Proven 21.1 Mt Gold 0.26 g/t 179 koz
Probable 166.8 Mt Gold 0.24 g/t 1,307 koz
Proven & Probable 187.8 Mt Gold 0.25 g/t 1,485 koz
Measured 75.2 Mt Gold 0.22 g/t 533 koz
Measured 75.2 Mt U3O8 70 g/t 11 M lbs
Indicated 165.4 Mt Gold 0.25 g/t 1,317 koz
Indicated 165.4 Mt U3O8 80 g/t 30 M lbs
Measured & Indicated 240.6 Mt Gold 0.24 g/t 1,849 koz
Measured & Indicated 240.6 Mt U3O8 80 g/t 41 M lbs

Commodity Production Costs:

CommodityUnits202220212020201920182017
Cash costs Gold USD  ......  Subscription required†  ......  Subscription required†
Total cash costs Gold USD  ......  Subscription required†  ......  Subscription required† 1,030 / oz†   969 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,094 / oz†   1,045 / oz†  
All-in costs Gold USD  ......  Subscription required†
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M ZAR  ......  Subscription required
Capital expenditures M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 12  USD 12  USD
Revenue M  ......  Subscription required  ......  Subscription required
Gross profit M  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 28, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 28, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Fact Sheet 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Subscription required - Subscription is required.

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