Diamonds & Gemstones

Diamond and Gemstones includes, diamonds, gemstones, coloured gemstones, ruby, emerald, sapphire and zircon. Diamonds includes diamond mining, diamond processing, kimberlite, alluvial diamond mining, cutting and polishing, beneficiation, diamond sorting, x-ray sorting, laboratory grown diamonds, lab grown diamonds, synthetic diamonds, diamond exploration, blockchain, Kimberley Process, diamond fingerprinting, diamond tailings, rough diamonds, blood diamonds, diamond tender.

WATER MANAGEMENT – IMPROVED SYSTEM FOR MINES

Research and development specifically aimed at more cost-effective management of mine water usage has led local water treatment specialists, TAG Water Systems/MC Process, to design a new turnkey water treatment system, the first of which has been commissioned in the Democratic Republic of Congo (DRC).

“Clean potable drinking and process water, to run the plant, was the motivation to develop a dual purpose system.” says TAG managing director Rogan Roulstone. “To meet the criteria we designed a dissolved air flotation (DAF) system with a combined potable drinking water treatment unit that recovers process water unfit for human consumption, but suitable for re-use in the plant,” he adds.

DCD-DORBYL THRIVES

DCD-Dorbyl Heavy Engineering has been commissioned by various divisions of Outotec – a leading global provider of process solutions, technologies and services for the mining and metallurgical industries – to produce no fewer than 19 ball and SAG mill shells for customers in three African and six overseas countries. This is a set of orders which will take the company well into 2008, according to marketing manager Bennie Bosch.

DE BEERS A WINNER

According to the judges, the plants – which were installed and commissioned at Snap Lake, near the Arctic Circle, and Victor, in Canada – demonstrated De Beers’ ability to accomplish a uniquely challenging task in the most arduous physical conditions.

“It is hard to imagine a more inhospitable site to build a plant than one close to the Arctic Circle, where temperatures are known to plummet to minus 50 degrees,” the judges pointed out. “Not only was special steel suitable for such conditions required, but working conditions were gruelling and the logistics proved to be a nightmare,” they added.

BOTSWANA’S NEW MINE

It is the Lerala diamond mine, situated in eastern Botswana some 80 km south of Selebi Phikwe, and developed by Brisbane-based specialist diamond explorer DiamonEx Limited, which is listed on both the Australian and Botswana stock exchanges.

“After completing our feasibility study and applying for and obtaining our mining lease, we started construction less than a year ago, and our first production will be happening in the new year,” says managing director Dan O’Neill. ‘‘We will ramp up to full production by the end of Q1 in 2008,” he adds.

DRC EXPANSION

“This has been achieved,” says managing director James Campbell in an exclusive interview with Mining Review Africa, “by acquiring a 35.42% share in Bugeco SA – a private Belgian company cooperating in the DRC. The total consideration paid was just over US$1.6 million (more than R11 million) in cash.

DRC expansion1
The AK6 bulk sampling plant
in Botswana

Bugeco’s key asset is a joint venture with De Beers on 22 licences covering 17 480 km2 of prospective diamondiferous ground. Initial exploration has discovered several new kimberlites in an area where alluvial diamonds are already in evidence. Analysis indicates the presence of microdiamonds in several of the newly discovered kimberlites.

ENGINE BLOCK RECLAMATION IS A VIABLE OPTION

Rottler machine
An engine block on Metric Automotive
Engineering’s Rottler machine

Pressure to deliver – in the mining industry and all other sectors, both locally and internationally – has caused lead times for plant and equipment to become excessive.

ZEST’S MASSIVE MOTOR

Zest Electric Motors & Drives – the leading distributor and marketer of a wide range of low-voltage, highvoltage, direct current and special electric motors, variable speed drives, soft starters, switchgear and transformers in sub-Saharan Africa – recently displayed the biggest cast-iron motor of its kind at the Zaminex mining exhibition in Zambia. This was the 2500 kW, fourpole, 6600 V WEG HGF 630 motor.
Zest's massive motor
Seen here at the Zaminex mining exhibition in Zambia are: Tom Anderson-Slight of EC Mining Limited, James Blakemore of Zest and Edson Christofolini of WEG

 

IMPROVED SECURITY SYSTEM FOR S.A. MINES

Canadian-listed diamond mining company Rockwell Diamonds Inc. has signed a major new deal with Cape Town-based security solutions company i to i technologies to establish the world’s first turnkey security initiative for its South African mining operations.

Roll-out of the state-of-the-art system is underway, with teams actively working at Rockwell’s Northern Cape mines, which include the Holpan Klipdam property, located 45 km from Kimberley.

NEW NON-EXPLOSIVE ROCK-BREAKING PRODUCT

Crackem
A ‘victim’ of the Crackem
rock-breaking process

A new product with certain applications in the mining, quarrying and construction industries has been launched on the South African market. The manufacturers claim that it can crack even the largest rocks overnight, with no flying debris and no danger to the surrounding environment.

NEW SERVICE TO MINING INVESTMENT COMMUNITY

Neels Engelbrecht
RSV’s new business director
Neels Engelbrecht

One of the leading mining engineering consultancies in South Africa, Read, Swatman & Voigt (Pty) Ltd (RSV), is expanding its client base to include investors and lenders in the mining industry to meet the increasing demand for high-level evaluations of mining projects. These include initial technical assessments, due diligence studies, competent person’s reports and feasibility studies.

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