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ASSMANG Structure

Clear growth strategy

Business model


An experienced board provides strategic direction and leadership, monitors the implementation of business and strategic plans, and approves capital funding for these plans to support a sustainable business.

Individually, directors bring a complementary range of skills and expertise to board deliberations, including engineering, metallurgy, finance, governance, legal and stakeholder engagement. Regular updates and in-depth sessions keep the board abreast of developments in our industry to ensure informed decisions.


Geological exploration starts in the Northern Cape province of South Africa.
Surveys on farms Beeshoek, Doornfontein, Driehoekspan and Paling
Manganese identified at Black Rock. The immense potential of South Africa’s manganese deposits is finally understood, but the lack of a rail link deters investment
Captain Thomas Shone and his partners set up Union Manganese Mines and Minerals Limited. They buy seven properties, including Bruce and King, and obtain mineral leases for others, such as Beeshoek and Bishop
Guido Sacco forms Gloucester Manganese and Manganese Corporation near Postmasburg, Northern Cape (near Beeshoek). His son, Desmond, becomes chairman of Assmang in 1999
Thomas Shone registers Manganese Corporation Limited, and large-scale production begins at its Beeshoek property
Koopmansfontein-Postmasburg railway line is opened for freight business
Anglo Transvaal Consolidated Investment Company Limited (Anglovaal) is established by Bob Hersov and Slip Menell. Guido Sacco approaches Bob Hersov to restructure the industry and forms African Mining and Trust
Anglovaal and African Mining and Trust, as partners, register a new company to mine the Gloucester deposits (see 1928). It is named Associated Manganese Mines of South Africa Limited (Ammosal), now Assmang Proprietary Limited
First manganese ore from Ammosal exported from Durban
Assmang acquires Black Rock, Northern Cape, and opens a new mine
Black Rock Mine is closed by a shortage of railway trucks to the Gloucester railhead as well as shipping capacity
After WWII, several mines, including Black Rock, reopen to fuel reconstruction in Europe
Second rush for ore-bearing properties. Assmang has options in the Kalahari on Nchwaning, Belgravia, Santoy and Gloria. It obtains titles to vast deposits of manganese ore that will last for decades (today, the Kalahari basin is considered the largest and richest manganese deposit in the world)
Negotiations between Anglovaal and African Mining and Trust result in acquiring the entire share capital of Gloucester Manganese, which becomes Assmang’s first wholly owned subsidiary. Gloucester, Bishop and Paling mines continue to operate, producing low-grade ore but, by the end of the 1960s, some of the mines are closed
Faced with ongoing rail-capacity challenges, Assmang diversifies into mineral beneficiation. Its second wholly owned subsidiary, Ferralloys Limited, produces ferromanganese and pig iron. Assmang opens two open-pit mines – Devon and Adams – to supply Ferralloys’ furnaces with manganese ore
Rail extension from Sishen to Hotazel, Northern Cape, completed
Eskom power reaches Beeshoek and Gloucester. Old and primitive mining methods give way to industrial machinery
First iron ore exported
At least 120 railway trucks dispatched daily and iron ore railings exceed 1 million tonnes
Assmang diversifies into low-carbon ferrochrome. African Mining and Trust’s consulting engineer recommends that the new plant be located at Fairview, near Machadodorp in Mpumalanga
Assmang becomes the biggest exporter of iron ore in South Africa. Belgravia mine, near Black Rock, opens as a new source of medium and high-grade ore in response to strong increase in global demand
US Steel buys shares in Assmang and agrees to buy iron ore for at least 15 years. Beeshoek is fully upgraded and scattered quarries are consolidated into open-cast pits
Ferrochrome smelter is completed
Black Rock and Belgravia are upgraded. Two new manganese mines at Nchwaning and Gloria are commissioned. Assmang’s capacity has almost doubled and mechanisation is the norm throughout its portfolio
Beeshoek iron ore facilities are enlarged; including commissioning a full washing and screening plant and a jig plant
Assmang reaches agreement with Iscor Ltd, owner of Sishen Iron Ore Mine, to cooperate on mining and railing to the port of Saldanha. Nchwaning 2 is commissioned, with capacity exceeding 3 million tonnes per annum
Railings increase to 1.1 million tonnes, but production forced to stop due to recession and the political aftermath of the Soweto uprisings against apartheid
Severe recession in the steel industry stops production at Black Rock, Belgravia and Gloria. Assmang moves into a maintenance and exploration phase. A solid double layer of manganese seams is outlined at Nchwaning, running beneath the Black Rock and Belgravia deposits
Assmang’s performance improves, with both iron ore and manganese ore railings rising to 1.5 million tonnes
Assmang obtains ISO 9002 accreditation – the first southern-hemisphere mining operation to be audited and accredited for all its surface and underground operational functions
Assmang acquires the chrome resource at Dwarsrivier in Mpumalanga, and approves finance to build a mine and expand capacity at Ferralloys in Machadodorp
Cato Ridge Alloys Proprietary Limited is incorporated by Assmang as a new wholly owned subsidiary, and production starts.
Assmang starts planning a new mine on Bruce, King and Mokaning farms (known as BKM and renamed Khumani Mine in 2007). Feasibility study commissioned for a 10-million tonne per year mine
Assmang commissions an extension at Beeshoek Mine (Beeshoek South)
Assmang restructures operations into three divisions: manganese, chrome and iron ore
New jig plant and iron-recovery plant are built, but Beeshoek is reaching the end of its productive life (at the projected production rate of 6 million tonnes of iron ore per year, remaining reserves would be depleted by around 2010. After reconsidering the mine’s reserves, life-of-mine was extended by 15 years to 2022)
New Nchwaning 3 shaft: ventilation shaft completed and 2.2km conveyor decline commissioned
Nchwaning 3 shaft: completed surface infrastructure and underground plant. Commissioned underground production mining
Anglovaal restructures and African Rainbow Minerals (ARM) is formed, becoming the first black economic empowerment (BEE) mining giant in South Africa. N’Chwaning 3 starts production.
Assmang board approves first phase of the BKM project on the Bruce, King and Mokaning properties – to establish an 8.4 million tonne per annum export iron ore mine – following a first commitment from national transport authority, Transnet, to expand the Sishen Orex export rail line
Assore and ARM become the only shareholders of Assmang, each with a 50% interest, and Assmang delists from the JSE. Proceeds are injected into new projects. BKM project: construction starts on the new Khumani Iron Ore Mine
Assmang obtains a mining right for the BKM properties which leads to the birth of Khumani Mine
Khumani: surface plant commissioned and first ore railed to Saldanha export port
Khumani: board approves additional R5.5 billion to expand mine from 10 million tonnes per annum to 14 million tonnes per annum by mining on the King property
Conversion of ferrochrome capacity in Machadodorp to ferromanganese begins
Production of ferrochrome at Machadodorp Works suspended due to adverse conditions in the ferrochrome market. Khumani: King plant commissioned. Khumani ramps up production from 10 million tonnes per annum to 14 million tonnes per annum
Assmang enters into a joint-venture agreement with Sumitomo Corporation and China Steel Corporation to build a manganese alloy smelting facility in the Sarawak state of Malaysia, Sakura Ferroalloys
Black Rock: board approves R7.2 billion capital for sustainable expansion at Nchwaning 3 shaft, Nchwaning 2 shaft, Nchwaning plant infrastructure, and a new ventilation shaft at Gloria
Construction begins at Sakura Ferroalloys plant. Assmang begins Black Rock expansion project to increase manganese output to 4.6 million tonnes per annum by 2020.
Production starts on Village pit at Beeshoek Mine
Commissioned furnace 1 at Sakura Ferroalloys in April, with first sales in May. Furnace 2 commissioned in September
Khumani produces a record 14.7 million tonnes of saleable material .
Nchwaning 2 shaft: completion of surface infrastructure and recommissioning of refurbished Nchwaning 2 vertical men-and-material shaft at Black Rock as part of the renewal and expansion project. This increases installed capacity by 50%. Black Rock Mine commissions new rapid loadout station
Gloria: board approves R2.7 billion for sustainable and renewable capital to modernise surface and underground plant and infrastructure.
Khumani produces record 14.7 million tonnes of saleable material. Surface infrastructure and recommissioning of new shaft completed at Black Rock as part of the expansion project, increasing production by 20%.
Board approves capital expenditure for Black Rock (R7.2 billion) and Gloria R3 billion) projects to modernise and expand the mine’s output by increasing volumes and flexibility to produce various grades of manganese ore at its three operating shafts while improving efficiencies
First 1 million tonnes of high-carbon ferromanganese produced at Sakura Ferroalloys
Assmang exports over 14 million tonnes of iron ore and almost 4 million tonnes of manganese ore. Beeshoek Mine LoM was extended to 15 years.
First 1 million tonnes of high-carbon ferromanganese sales at Sakura Ferroalloys
Sinter plant commissioned at Cato Ridge Works, water-treatment plant commissioned at Sakura Ferroalloys, R10.2 billion expansion projects completed at Black Rock Mine. Black Rock Mine: R7.2 billion sustainable and expansion projects complete. Gloria: R2.7 billion renewal and expansion projects complete