Metallurgical Industry

DemcoTECH Engineering 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.

Marropino Tantalite Processing Facility

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

DemcoTECH Engineering 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 …

Tenke Fungurume Sulphur Storage & Lime Dosing System

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

DemcoTECH Engineering 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 …

Pipe Conveyor for Koidu Diamond Processing Plant

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 …

Expansion to Assmang’s Cato Ridge Alloys plant

Commodity: Manganese Ore; Contract Type: Turnkey

DemcoTECH Engineering 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 existingequipment to suit a greater throughput of wagons. Read more …

Belt Filter & Cooling System for Tronox Namakwa Sands

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 …

Khumani Mine Multi-Stream Iron Ore Sampling Plant

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 (two off) and vibrating feeders (two off), an automated process crane, conveyors and storage bin. The process building is a 80 metre x 25 metre x 30 metre high structure.

Sinter Plant – Cato Ridge Alloys, Brix

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

DemcoTECH Engineering 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.