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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.

Sources:

  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
norteabierto

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.

foto con polvo despues

Aminpro improves its Pilot Plant

At Aminpro we have a complete pilot plant for mineral processing, including crushing, milling, flotation and thickening operations.

Our flotation cells are modified square Denver cells, with capacities ranging from 80L for the rougher stage, to 5L to the cleaner.

During 2021, we have been modifying and improving our flotation cells in order to enhance our capacity to float coarse and heavy materials, such as iron ore. These improvements entail the modification of the overflowing system and some internal designs, in order to prevent solid settlement, thus obtaining a more efficient operation.

If you want to know more about our facilities, equipment and capabilities, just contact us.

servicio-planta-piloto-interna
Presentacion Aminpro Procemin 2

Aminpro is at Procemin-Geomet 2020

Aminpro is part of Procemin-Geomet 2020, represented by Diego Mesa, our R&D Specialist, and Patricio Berríos, Chief of Engineering and Quality. This Thursday 26th of November they will be participating in the panel “Mineral Processing – Data analytics, modelling and optimisation”, where they’ll be answering questions about the work titled “Reprocessing of historic tailings – three Chilean case studies”.

In this work, they analysed the conceptual engineering of three Chilean projects that involve the reprocessing of tailings, and on which Aminpro was hired as consultants. Different problems and strategies are evaluated, considering particle size, pH, reagents and even different concentration methods such as flotation (for primary and secondary copper) and magnetic concentration (for a magnetite concentration project). The results are discussed from a metallurgical and economic perspective, using the software Aminfloat.

You can download the paper here, and watch the video-presentation next (video presented in Spanish).