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Baja Mining Completes Initial Metallurgical Test Work at Cinto Colorado Tailing Project, Mexico

Published: January 11, 2016 |

[Click image to enlarge]

Initial metallurgical test work on samples taken from Baja Mining Corp.‘s Cinto Colorado leach/precipitation/flotation (LPF) tailings located in Santa Rosalia, adjacent to the Boleo mine site, have yielded positive results. The company engaged Met-Solve Laboratories in Langley, BC to undertake and coordinate the testing, which was supervised by Dr. Dreisinger, with Dr. Thomas Gluck, the former director of Process Technology at Baja and a co-author of the 2010 Boleo technical report, as project manager.

Test work confirmed that the Cinto tailings are suitable for leaching. Recoveries from bench scale testing approached 70 percebt with modest acid consumption. Ion exchange (IX) testing using a copper selective, chelating resin, produced concentrated copper solutions potentially suitable for direct addition to the Boleo plant copper recovery process or, alternatively, for direct electrolysis to copper metal. One option for direct electrolysis would be to use Electrometal’s EMEW technology.

Baja has recently presented its concepts for the development of the Cinto tailings to MMB and KORES, including simply trucking the tailings on an existing haul road to be fed into the Boleo plant, or producing and supplying an enriched copper pregnant liquor solution (PLS), pumped a distance of approximately 2 km from the Cinto plant to the Boleo plant. The company has agreed with KORES that it will advance these concepts for further review with KORES and MMB. A key aspect of its discussions with KORES will be to determine what level of cooperation in terms of access to infrastructure and process consumables that Baja and Cinto may be able to secure from MMB.

“We are very encouraged with the results from our initial metallurgical testing on the Cinto tailings. We believe that the successful enrichment results using the ion exchange process demonstrate the attractive potential for processing the tailings either by the provision of an enriched PLS solution into the Boleo processing plant, or as an independent processing operation. We plan to continue negotiations with our Korean partners to reach agreement on how we can work together to process the Cinto tailings for the benefit of both parties and the community of Santa Rosalia,” said Tom Ogryzlo, interim CEO.

Cinto Colorado and Baja management previously met with the newly-elected president of the Municipio of Mulege to introduce plans for processing the Cinto tailings. Most recently, at a meeting with Cinto Colorado on December 18, 2015, the president pledged to present the Cinto tailings project to the “Cabilido”, the newly-elected counsel of the Municipio, to obtain its formal support for the project. Cinto Colorado and the company expect to attend that meeting, which is currently scheduled for later this month. With the anticipated support from the Municipio, the company intends to further advance its pre-feasibility/concept study and continue its metallurgical testing for producing an enriched PLS copper solution to Boleo, as well as the possibility of producing copper independently using an EMEW plant.


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