New leaching facilities

At Aminpro we are constantly investing in the continuous improvement of our processes and facilities, in order to deliver the best service to our customers. That is why we have expanded our installed capacity to perform leaching tests at different scales.

We have new automated equipment for bottle leaching tests, with temperature, agitation, and timer control. We have also installed 30 6-meter high columns for 180-day irrigation tests.

We are currently conducting several tests of non-chloride leaching of copper ores, using 3 sets of columns in a series of 3, i.e. where the first column feeds the second column, etc. This allows us to study the behavior of the ore over long periods of time with different irrigation rates.

If you are looking for more information about our leaching work, please do not hesitate to contact us.


New geometallurgical project

Aminpro is starting a new project of test work for geometallurgy, which considers the mapping, and comminution and concentration tests to inform the geometallurgical models of our client. The project includes the mapping of 6,000 m of cores, comminutions tests, flotation and magnetic separation, as well as sedimentation tests and rheology characterization.

The project also considers the pilot testing of magnetic separation, both dry and wet,  using magnetic drums – DFA – CDA – L-8, among others.

For more information about our projects and capabilities, don’t hesitate to contact us.


The importance of laboratory tests

Laboratory tests are crucial to characterize the mineral to be processed, in order to identify early opportunities for improvement and possible technical challenges, such as the presence of clays, complex gangues, changes in the grade, mineralogy, hardness, liberation, etc. The early detection of these problems allows the definition of processing strategies, reduces operational risk and technical-economic uncertainty, and generates opportunities for continuous improvement with the consequent increase in the value of the project. The technical and scientific literature shows many examples where complete projects have failed due to poor mineral characterization, which has resulted in serious design and operation problems. Some examples include:

  • Non-representative samples determined a much harder mineral than the real one, so the mineral tended to be over-ground.
  • Chemical and mineralogical analyzes of a copper mine did not include the identification of fluorite. By going through a bioleaching process, the fluorite-rich mineral killed the bacteria.
  • Many plants were designed around composites of an “average” ore, without considering variability and extreme values ​​in terms of hardness, grade, and so on. Then, every time a mineral of extreme values ​​passed through the plant (higher hardness, lower grade, etc.), the treatment capacity and metallurgical results fell for weeks.

Problems such as the above can be prevented by conducting quality geometallurgical campaigns. This requires representative tests, variability analysis and statistically robust studies, but also requires a team of specialist engineers who interpret these results and can provide timely technical recommendations.

At Aminpro we have vast experience in planning, conducting and interpreting metallurgical campaigns. We carry out crushing, grinding, flotation, leaching and tailings deposition tests, both on a laboratory and pilot scale. If you require more information about our work, do not hesitate to contact us.


  1. Runge, Kym. ‘Laboratory Flotation Testing – An Essential Tool for Ore Characterisation’. In Flotation Plant Optimisation – A Metallurgical Guide to Identifying and Solving Problems in Flotation Plants, 19. Carlton, VIC: AusIMM: Australian Institute of Mining and Metallurgy, 2010.
  2. Connely, Damian. ‘It Might Have Been Different But’. Linkedin, 11 March 2016. https://www.linkedin.com/pulse/might-have-been-different-damian-connelly/.
  3. Dominy, Simon, Louisa O’Connor, Anita Parbhakar-Fox, Hylke Glass, and Saranchimeg Purevgerel. ‘Geometallurgy—A Route to More Resilient Mine Operations’. Minerals 8, no. 12 (1 December 2018): 560. https://doi.org/10.3390/min8120560.
  4. Dominy, Simon, Louisa O’Connor, Hylke Glass, Saranchimeg Purevgerel, and Yuling Xie. ‘Towards Representative Metallurgical Sampling and Gold Recovery Testwork Programmes’. Minerals 8, no. 5 (4 May 2018): 193. https://doi.org/10.3390/min8050193

Aminpro initiates metallurgical support to Norte Abierto

Norte Abierto

The Norte Abierto project, located in the Atacama Region, started in 2017 after the merging of Cerro Casale and Caspiche, in order to extract gold and copper on a large scale. Aminpro has started giving technical support via a flotation testing program.

The program considers SKT flotation tests for sector-by-sector composites and variability samples, as well as open-cycle and closed-cycle test tests. The use of SKT tests allows us to simulate the industrial performance curve using our AminFloat simulator. We have also included sedimentation tests and rheological study of the tailings generated, to obtain a metallurgical characterization of the entire flotation process.

Aminpro has a large metallurgical laboratory, where we perform both standard tests, own tests and ad-hoc tests tailored to the particular needs of our customers. We also have a team of engineers who analyze the metallurgical results obtained, delivering detailed reports with recommendations, models, and proposals for continuous improvement.

If you need more information about our technical capabilities, don’t hesitate to contact us.


LEIT test at Aminpro

At Aminpro we perform the LEIT: Low Energy Impact Test). This impact test is based on the crushability test developed by Bond, which allows the calculation of the actual power requirements for crushing in terms of the ImpactWork index.

The equipment consists of two pendulum-mounted hammers that simultaneously and evenly hit the rock sample. The LEIT test is performed on ten or more representative ore samples in order to obtain statistically significant results.

The results obtained with this test allow designing and dimensioning the crushers needed, identify geometallurgical units with different hardness, estimate the energy requirement of the crushing plant, among others.

If you are looking for more information about our comminution tests, do not hesitate to contact us.


Aminpro increased copper recovery in 8 percentage points

Aminpro performed column leaching tests for Antilla mining project, owned by Panoro Minerals.

Antilla project considers leaching over 117 Mton of secondary copper sulfides. Previous tests carried out by the company showed copper recoveries of 72,5% in 200 days of processing.

Aminpro engineers managed to obtain copper recoveries close to 80% in just 150 days of column leaching.

The President & CEO of Antilla project, Luquman Shaheen, was happy with our results:

“The results of the column-leaching experimental programme have shown a significative growth potential for the economy of Antila project”

These results were highlighted by the specialised press in Peru, as can be seen in this magazine article of  Rumbo Minero.

If you are looking for increasing the productivity of your metallurgical process, contact us!

Visita Virginia Tech

Virginia Tech visited Aminpro

A delegation of 23 students from Virginia Tech, USA, visited Aminpro. The students were in Chile visiting several mining operations and similar companies. The visit to our facilities aimed to teach the students about the role that metallurgical laboratories and consulting companies play in the mining industry.

During their visit, they were received by Roger Amelunxen, Director of Aminpro. The students were able to visit every corner of our laboratory, pilot plant and engineering rooms, where they could ask questions to our engineers and learn about our work.

The visit, part of the Rising Sophomore Abroad Program, allowed the students to have a close look at the different processes of sample preparation, milling and flotation, learn about the traceability within our laboratory and the utility of the experimental data for modelling and plant optimization.

Alex Carvajal, CEO of Aminpro, was glad about the success of this international visit and is excited about receiving more institutions, national and international.

“We are a research and development company, and as such, attracting young and talented students is a key challenge for the development and growth of our team. We hope to receive more and more students from different careers close to mining and metallurgy, so they can learn more about how their theoretical knowledge is applied every day in the industry”.

If your university or institution wants to visit Aminpro, contact us at info@aminpro.com