Metallurgical Industry

DemcoTECH provides environmentally-compliant plants to process run-of-mine ore through to final product, aimed at the operators of more specialised plants in the minerals- and metals-processing industries. Our process plants are based on specialised process technology, incorporating the complete spectrum from ore handling and preparation, to bulk materials handling and dust and tailings disposal systems.

Commodity: Tantalite Concentrate; Contract Type: Design, Engineering, Erection & Commissioning

DemcoTECH was responsible for design, engineering and layout of the front end and layout of the process plant for Noventa Limited’s tantalite processing facility at Marropino in Mozambique. A design challenge was to reduce the size of the ROM ore from approx. 200 mm particle size down to – 1 mm to be pumped to the wet processing area. DemcoTECH was responsible for engineering of this pipeline, all piping in the wet processing facility and for pumping of the waste to the tailings dam. Read more …

Commodity: Sulphur, Lime; Contract Type: Fixed Price Project, excluding civils, electricals and erection

DemcoTECH supplied a sulphur storage and lime dosing system for the sulphuric acid plant for Freeport-McMoRan Copper & Gold’s giant copper/cobalt project in the DRC. The system consists of a 150 ton stainless steel storage silo, mounted on load cells, a belt feeder discharge, an automatic lime dosing system and a luffing conveyor. The system incorporates a number of design features to optimise the operation and facilitate maintenance of the sulphur melting tank mechanicals. Read more …

Commodity: Diamonds; Contract Type: Design, Engineer & Supply

DemcoTECH was contracted by Consulmet to supply a pipe conveyor for the new 180 tph diamond processing plant at Koidu Mine in Sierra Leone. The 45.6 m long, 200 mm diameter pipe conveyor conveys 2 tph of diamondiferous ore from the process plant at 0.5 m/s to a secure area. The technology provides secure handling of the material containing diamonds along the complete length of the conveyor, as they are completely enclosed by the conveyor belt for the major portion of its travel. Read more …

Commodity: Manganese Ore; Contract Type: Turnkey

DemcoTECH was contracted, with Kantey & Templer Consulting Engineers, for the expansion to the manganese export facility at Assmang Limited’s Cato Ridge Alloys plant in KwaZulu-Natal, South Africal. The expansion consisted of upgrading two existing rail tipplers, installing a series of troughed conveyors with transfer houses, from the tipplers to a new 80,000 ton stockpile, an elevated travelling tripper, tunnel reclaim equipment and a road load-out facility. Upgrading the two rail tipplers involved adapting the existing equipment to suit a greater throughput of wagons. Read more …

Commodity: Ilmenite (FeTiO3); Contract Type: Detailed Design followed by LSTK Project Execution

A project to provide a belt filter and cooling system for the processing facility at the Tronox Namakwa Sands heavy minerals mine near Brand-se-Baai in South Africa, was carried out in two phases: the detailed design comprised a six month contract, followed by the award of a fast track lump sum turnkey (LSTK) execution contract. The cooling system was installed to increase the separation efficiency of the WHIMS, as magnetic separation is highly temperature sensitive. All construction work had to be carried out with minimal disruption to operations. Read more …

Commodity: Iron Ore; Contract Type: Design, Engineering, Procurement, Erection & Commissioning

DemcoTECH was contracted by Assmang Limited for the design through to commissioning of the multi-stream sampling plant for its Khumani Iron Ore Mine. The plant features three sample processing streams, multiple load-cell mounted weigh hoppers, two driers and multiple sample splitters. Other features include deck screens and vibrating feeders, an automated process crane, conveyors and storage bin. The process building is a 80 metre x 25 metre x 30 metre high structure. Read more …

Commodity: Manganese; Contract Type: Design, Engineering, Construction Supervision & Optimisation

DemcoTECH performed the full design, engineering, procurement of mechanical components, erection and commissioning supervision and optimisation for a sinter plant for Cato Ridge Alloys in KwaZulu-Natal, South Africa. The plant is self-standing and installed to enhance the overall existing process and profitability of the operation, which processes manganese. Read more …

Commodity: Manganese; Contract Type: Design, Engineering, Commissioning Supervision & Optimisation

DemcoTECH’s contract for a new sintering plant at Sakura Ferroalloys’ facility in Malaysia comprises design of a new crushing and screening circuit, along with a proportioning, mixing and pelletising system that allows for by-products, recycled material and fines of the existing submerged arc furnace smelting process to be utilised through sintering. This second sinter plant was awarded to DemcoTECH due to the success of an earlier project for Cato Ridge Alloys. Read more …

Commodity: Titanium ore; Contract Type: Design, Manufacture & Supply

DemcoTECH designed, engineered and supplied Kenmare Moma Minerals Processing Limited with the unique DemcoTECH AeroConveyor™. The project was executed in two phases. In the first phase, an AeroConveyor™ and tail-end combination hopper were supplied to the MOMA plant in Mozambique, with the scope also including repurposing the existing AeroConveyor™. Based on the success of this first installation, the client placed an order to retrofit four AeroConveyors™ in other parts of the plant. Read more …