Debswana Diamond Company Ltd, known as Debswana, is located in Botswana and currently the world's leading producer of diamonds by value operating four diamond mines in central Botswana, including a coal mine. 

In 2009 ADP was commissioned by Debswana for the design of a modular tailings treatment plant with a 2.5 mtpa name plate for its Jwaneng mine.  Jwaneng open pit mine processes around 9.3 million tons per year of ore and mines an additional 37 million tons per year of waste rock. The mine is located on three kimberlite pipes that converge near the surface, covering 520,000 square metres at ground level. Currently, the mine produces approximately 11 million carats (2,200 kg) of diamonds.
The 37 million ton tailings dump is exceptionally high grade largely because the plant was not initially designed to liberate all locked diamonds below the top size of 25mm. The commissioning of the re-crush plant in the 1980’s reduced the liberation top size to 8mm.
Concept, Feasibility and Value engineering studies were conducted by ADP from 2009 until 2011 upon which a contract for the detail design and procurement (EP) were awarded to ADP.  The Engineering and Procurement phases of the project were completed in Q3 2013 and were followed by the construction of the plant.  Debswana elected to manage the construction and commissioning of the plant , while ADP provided technical support.  The project was successfully commissioned in Q4 2014.

ADP was commissioned by Namdeb for the design and implementation of the RAC project in Oranjemund, Namibia.

Final objective of the facility was to produce an export diamond product from all the Namdeb production sites as well as final sorting and treatment of De Beers Marine Namibia concentrate product.
The Red Area Complex is the culmination of 10 years of effort between Namdeb and its partner ADP incorporating learnings from several earlier diamond recovery projects, resulting in a design that is both fit for purpose and world class with regard to diamond recovery plants.
The existing Recovery and Sorthouse located at #4 Plant within Mining Area 1, was built during the 1950’s and despite several upgrades over the years, was no longer able to perform to specification.
A breakdown of the project objectives is as follows:
- To provide a Red Area Facility that is able to handle diamondiferous concentrates (recover, sort and despatch) from all the Namdeb production areas for the projected life of mine.
- Conformance to De Beers Group Diamond Value Management Criteria with regard to “Red Areas”, with particular emphasis on diamond control guidelines and loss prevention. The overall recovery efficiency must be increased above historically achieved by Namdeb across the entire product size range for all sources.

- Provide a separate sorting area within the complex for the De Beers Marine final concentrate sorting and diamond preparation.
- Extend the land-based resource, by converting currently un-pay mining blocks into payable resource with the increase in recovered grade

Implementation:

Construction began mid 2012 and the plant was commissioned during the first quarter 2014.

ADP was the appointed EPCM contractor and mainly Namibian sub-contractors were used to construct the facility.

ADP Marine and Modular were commissioned by Namdeb to determine and implement a complete economically viable and sustainable solution to mine the Sendelingsdrif alluvial deposit located in Namdeb’s Orange River Mines Mining License Area (ML42) on the Namibian side of the Orange River.
The Sendelingsdrif area has a tourism-based land end use and as such the full design of the project was done with that end state in mind. A full Environmental Impact Assessment was conducted and included various specialist studies as identified by the team and Interested & Affected Parties (I&AP) during the stakeholder engagements.
The Sendelingsdrif project team (a partnership between ADP and the Namdeb Owners team) executed the detail design and construction of the Sendelingsdrif Treatment Plant (STP) and the associated infrastructure.
Seamless transition between the current Daberas operation and the Sendelingsdrif operation was seen as one of the biggest challenges of the project as the same mining equipment had to be utilised as was currently in operation at Daberas.
All on-mine infrastructure had to be provided to cater for all necessary support services, including water, power, earthmoving and treatment maintenance facilities, administration buildings etc.

Implementation:

The Sendelingsdrif Treatment Plant was designed to treat 850 tph of head feed from seven separate alluvial mining zones.
The plant is divided into 2 distinct areas – a dry front-end comprising main tip with rotating barrel screen feeding dry primary and de-sanding screening sections. The de-sanded stockpiled material is then fed to a wet screening section where after it goes through a dense-medium separation plant and large stone recovery plant.
A feature of this plant was substantial re-use of re-furbished 2nd hand plant from the client which served to reduce the capital costs significantly.
Construction started mid 2012 and first gravels were processed in March 2014.
The Construction period included 2 x summer periods where temperatures regularly exceed 50 degrees centigrade. ¾ million injury free man-hours was a major achievement on this project.

Venetia Diamond Mine is situated in the Limpopo Province , 35km due South of the joint border between South Africa , Botswana and Zimbabwe. Venetia is De Beers’ largest South African producer of rough diamonds with its main treatment plant (MTP) rated to treat 900 tph of material at steady state.
In order to improve on the current performance of the plant, ADP Projects were commissioned by Venetia Mine to undertake a study to identify operational enhancements that would ensure that processes operate at the optimum. The outcome of the study resulted in a project which includes:
- The design, fabrication and installation of a 50 tonne bin in the Reconcentration plant area
- The installation of a hydraulic belt feeder which is supplied by ADP Marine and Modular to ADP Projects, to extract feed from the bin at a controlled rate to prevent any bottlenecking of material.
- Replacing obsolete and under performing equipment in the final recovery plant.

Diamonds
Letšeng Diamonds (JV - Gem Diamonds and Lesotho Government)
Lesotho
Pre-feasibility study, feasibility study and EPCM services for new process plant to expand mine capacity from 4,8mtpa to 10mtpa including all associated infrastructure as well as power supply upgrade, water and sewage treatment upgrades, accommodation and mine facilities extensions.

Concept and EPCM services for brownfields new final recovery building.

Concept and EPCM services for brownfields optimation of existing process plants.

Diamonds
Debswana (JV - De Beers and Botswana Government)
Botswana
2,4mtpa
Cut 9

Process engineering services for concept study.
Tailings Treatment Plant

Concept, pre-feasibility study, feasibility study and engineering, procurement and site engineering support for a processing plant to recover diamonds from the MTP tailings stockpile.
Logwasher

Detail design, procurement and site engineering support for a processing plant to recover diamonds from the Recrush tailings stockpile.
PMO Portfolio

Studies and implementation of Category 1&2 projects.

Diamonds
Debswana (JV - De Beers & Botswana Government)
Botswana
Cut 3

Process engineering services for concept study.
2 Plant DMS Efficiency

Concept and detail design for brownfields optimization to existing process plant.
Test Recovery Plant

Namibia
Namdeb (JV - De Beers & Namibia Government)
Diamonds
Marine Dredging Treatment Plant (MDTP)

Concept through to Commissioning.
No3 Plant Upgrade

Detail design, procurement and site engineering support for MCC and electrical upgrades at 3 Plant.
Pocket Beaches

Ebay