Mineral Processing

African Minerals and Geosciences Centre
Minerals For Development

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"The solution for your mineral Recovery problems"
The mineral Processing laboratory
Mineral Processing Laboratory provides a wide range of ore beneficiation and metal extraction research services for the mining industry. It is equipped with a unique platform of laboratory bench scale facilities for the development and testing of energy-saving, low-cost crushing, grinding and concentration processes in environmental friendly ways. The laboratory is equipped to develop mineral processing methods anywhere along the beneficiation chain from mineralogical analysis to dealing with process waste. Testing of appropriate methods can be conducted from bench-scale to pilot-scale with effectively desired output through considering different ore properties such as
  • Hydrophobia,
  • Magnetic susceptibility,
  • Grindability,
  • Floatability,
  • Specific

In addition the laboratory has extensive experience in dewatering and filtering methods, all of which can be tested at pilot scale. Hydrometallurgical methods to separate minerals not conducive to conventional methods is also available. Each aspect of beneficiation is optimized and incorporated into an overall efficient of the process with pilot testing allowing the study of many aspects of ore handling and concentration, including
  • Ore crushing and grinding,
  • Bench scale gravity concentration
  • Dense/heavy media separation • Magnetic separation,
  • Froth flotation
  • Dewatering or solid-liquid separation.
  • Ore screening and classification using hydro-cyclones.
  • Leaching (hydrometallurgy) and
  • Training in different areas of mineral processing,

Sample Preparation
Another important aspect of the department is the sample preparation section which is equipped with staged rock size reduction machines and homogenization facilities in order to assure obtaining of representative samples for chemical analysis. Chromium steel, carbon steel or agate pot sample milling options are available to accommodate contamination levels required during sample preparation.
Overhead and low level dust extraction facilities are installed along with the sample preparation machines in order to control sample cross-contamination during the processing of customers’ job requests.

The section conducts hands on training courses for AMGC member states, other interested persons and institutions on different subjects related to mineral recovery techniques. The section uses its laboratory equipment and facilities for demonstration of the different methods for the recovery and beneficiation of minerals. Course participants are allowed to come with their own samples for use during the training courses.
The section has collaborates with the different universities in Tanzania by training their students during their field attachment and final year projects.
Currently the following courses offered
  • Practical Mineral Processing and The Basic Mineral Processing Flowsheet
  • Crushing and Grinding – Fundamentals,  Unit Operations  and Circuit Optimization 
  • Flotation - Fundamentals , Unit Operations and  Circuits 
  • Hydrometallurgy – The Leaching Process, Purification of Leach Solutions  and Precipitation from Leach Solutions 
  • Cyanide in Mining - Techniques of Gold Cyanidation 
  • Extractive Metallurgy - Metals, Ore Deposits and Minerals, Beneficiation, Extraction and Metallurgical Processes
  • Metallurgical Balance And Process Control
  • Mineral Economics and Evaluation
  • Overview and Advancements in Mineral Processing and Characterization 
  • Sampling and Preparation Of Geological Materials for Laboratory Tests
  • Industrial Minerals – Properties, Beneficiation and Value Addition
  • Health, Safety and Environmental Management for the Extractive and Minerals Processing Industries

The courses are delivered for five days of both classroom learning and laboratory practicals. Participants who attend the entire short course and complete an evaluation at the end of the course will receive a Certificate of Attendance, confirming their participation and knowledge gained.

These courses are beneficial to and target, plant managers, operation managers, technical managers, metallurgists, engineers and researchers, engineering geologists, processing managers, suppliers, metallurgists, small scale mining entrepreneurs, materials managers. But all stakeholders in the mining and minerals business such as policy makers, regulators, and etc. are set to benefit from the courses above. It is also of value to students as well as research and academic personnel of universities. The course can also benefit service providers and suppliers to the mining industry.

The mineral processing section gives consultancy services to interested institutions and individuals wishing to develop mineral recovery systems. Special emphasis is offered to the improvement of mineral recoveries in small to medium scale operators. The ministry of energy and minerals of Tanzania and local mineral entrepreneurs have benefited from such consultancy services offered by the section.

Research and Development
As technological systems, mineral processing plants occasionally will default from their designed operating parameters and will need corrective measures done in order to bring the plant to optimum operating conditions. The mineral processing section conducts research and development studies on specific problems facing mineral recovery operations.
The section was involved in the development of a granulation system for the beneficiation of soft phosphate ore in order to facilitate its handling during agronomic applications.
Advantages of Having Ore Tested
  • Gather knowledge of quality and reserves of your mineral deposits (estimation of probable life-time of mine and calculation of expected returns)
  • Gather knowledge of ore deposit characteristics (Mineralogical characteristics of the ore)
  • Gather reliable data which will facilitate smooth and safe technological adjustments necessitated by variations of ore characteristics
  • Gather information enabling the precise financial planning for future development
  • Optimisation of mineral recoveries and utilization of processing equipment

The Risk of Having Ore Not Tested
  • Poorly designed mineral recovery plant (milling and upgrading). Equipment in mismatch with throughput)
  • High financial risks
  • Low safety profile
  • Loss of valuable minerals (high losses to tailings) non-optimized mineral recovery
  • Waste and loss of capital invested and loss of development opportunities
  • Low-profile environmental consciousness
  • Non-ecological mining practices and tailing disposal (non accordance with environmental standards)
required procedure
  • Conduct professional ore sampling in your mining claim (AMGC is offering assistance if required)
  • Send samples to be tested and to be analysed at AMGC for appropriate mineral recovery technology
  • Get technical advice from specialists in mineral technology
  • Train yourself in mineral technology by attending training programs conducted at AMGC in Dar es Salaam, Tanzania.

Alex Mkama - Mineral Processing Engineer
Dachi Mahmoud - Mineral processing Technician .

Geosciences Updates

Contact Us

African Minerals and Geosciences Centre (AMGC)
P.O.Box 9573, Kunduchi Beach Area, Dar es Salaam, Tanzania
Office Tel: +255222650347 Fax: (255 22) 2650319
Business Hours: 8AM–4PM Monday - Friday.