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Technology & Diamonds
By: Diamond World News Service
Jun 22 2016 6:23PM
Reference: 13150  

Technologies create a huge potential for a positive change in the trajectory of the global mining industry. The technologies have not only been useful in fasttracking the mining/sorting
related activities but are also helpful in reducing energy consumption. In this feature, Diamond World brings you few technologies that are being used in diamond mining/sorting.

X-ray transmission technology enables materials to be recognised and separated based on their specific atomic density. This technology makes it possible to obtain a high purity level in sorting materials irrespective of size, moisture or surface pollution level. It is used particularly for small particles and less conductive nonliberated metal recovery. During a celebration of a million carats recovered from Karowe mine on November 1, Lucara Diamond Corporation chief operations officer, Paul Day stated that the mine was at making history by becoming the first diamond mine to use XRT technology to recover diamonds.

Steinert XSS T (X-Ray transmission sensor sorter)
Precious stones like diamonds need special sorting requirements. So the STEINERT XSS T (X-Ray transmission sensor sorter) was adapted to the STEINERT XTS sorter. STEINERT developed this sensor-based sorting solution to produce more gemstones like diamonds at less opex. STEINERT provides innovative solutions for rough-diamond final recovery sorting using x-ray transmission (XRT) sensor sorting technology. Early in the process diamonds are recovered via the STEINERT XSS T, a high-capacity sorter. It recovers the diamonds before the next crushing stage which could potentially damage diamonds. This coarse size diamond recovery process eliminates the need of an expensive density separation pre-concentration process. Their final recovery for diamond sorting – the STEINERT XTS sorter - provides perfect diamond detection and recovery at high throughput rates.

Steinert XSS T (X-Ray transmission sensor sorter) MagRoll Wet or Dry Feed Application
The MagRoll is fitted with a high-strength large diameter roll. It has application in separation of minerals such as diamonds, iron ore, andalusite and mineral sands. Diamond material can be processed either wet or dry. Other minerals, depending on physical characteristics, may also be processed wet. Exceptionally strong magnetic forces generated by the SuperRoll, are ideally suited to difficult applications and enable more efficient separations at higher throughputs than conventional magnetic roll and drum separators; efficient separations achievable over a wide range of particle sizes from <1mm up to 16mm; material, which may be of high value, remains secure within the machine; dust is contained and may be easily extracted from the machine via a single connection. Dust build-up on themagnet which, over time, would cause loss of performance and belt tracking problems is minimized; Long, trouble-free belt life resulting in minimal downtime and low maintenance costs; the standard MagRoll frame may be fitted with a low strength Barium Ferrite ‘scalping’ roll to remove strongly magnetic particles prior to further treatment by a second MagRoll fitted with a SuperRoll; readily customised to suit exact user requirements; internal alarm and condition monitoring logic for speedy fault detection and correction.

MagRoll Wet or Dry Feed Application Non-nuclear Dense Medium Controller (DMC)
The function of the nonnuclear DMC is to measure and automatically control the Ferrosilicon and Magnetite circuit density in Dense Medium Separation Plants as utilised in coal, iron ore, chrome and diamonds. The Dense Medium Controller (DMC) is designed to measure the density of slurries accurately and reliably in Dense Medium Separation Plants. The technology used is nonnuclear and has been used in the diamond industry for over a decade. Being non-nuclear eliminates the legislative, safety, environmental and personnel skill requirements associated with nucleonic densitometers.

Non-nuclear Dense Medium Controller RhoVol
The RhoVol machine is a densimetric measurement system that determines the density of an ore sample, by measurement of the mass and volume of the sample, on an individual particle basis. The machine processes batches totally autonomously and data is displayed live as it is captured, as well as in a standard spread sheet format on a per particle basis. The Machine is material independent and density measurement range is programmable but not restricted.

RhoVol CDUV 1130 and CDUV 118 Osprey Ultra Violet diamond Scavenging Sorter
Free fall UV diamond scavenging sorter, single pass, single input. Final processing of tailings from re-concentration processes like X-ray recon, sort house glove boxes, SPS, etc. Material size range (-19mm + 1mm) split at appropriate ratio and feedrates. Material feed application dry. Feasible grease replacement technology. It helps in optimum diamond scavenging with minimum gangue material at high federates; spillage free, low yields; operator and maintenance friendly; complete operator safety; low operating costs; low Capex; complimentary technology to X-ray sorting

Lockheed Martin hybrid airship
The LMH-1 is a unique new aircraft which is part helium dirigible, part cargo helicopter, part passenger airliner and part hovercraft. This airship is expected to be a major breakthrough in the remote mining, as per reports. The aircraft is expected to enter commercial service in around three year’s time. The mining is moving into remote locations as easily-reachable deposits are being depleted. Mining is water intensive and many mines are located near bodies of water meaning many operations can utilize hybrid airships without creating any new infrastructure, says a report. The LMH-1 will be three times the size of the prototype – 300 feet (90m) long and 78 feet (24m) high. Four small side-mounted engines provide thrust vectoring propulsion and vertical take-off and landing. Cruising speed with a full load is 60 knots giving the aircraft a range of 1,400 nautical miles (1,611 miles or 2,593 km).

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