Image credits: Altaley Mining
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News Article

Campo Morado To Potentially Increase its Recoveries

By Paloma Duran | Thu, 08/05/2021 - 12:01

Altaley Mining announced that it has begun an extensive metallurgical testing program at its Campo Morado mine in Guerrero to investigate the possibility of increasing its recoveries of gold, silver, zinc, lead and copper.

Altaley is working with Maelgwyn Mineral Services Ltd (MMS) to explore the possibilities of increasing its base metal and precious metal recoveries through “MMS patented Imhoflot™ pneumatic flotation technology for concentrate flotation and Leachox™ Process for forced oxidation and leach recovery of precious metals.”

MMS has shipped its Imhoflot™ pneumatic flotation pilot plant to Campo Morado, which has started an extensive metallurgical testing program that will last between 3 and 4 months. The company will first examine the recoveries generated by the pilot plant to compare them with its current recoveries obtained through traditional mechanical flotation circuit.

Altaley announced  it will conduct additional testing of the pilot plan to examine the possibility of producing a gold-rich pyrite concentrate that could be sold later. Additionally, fresh tailings material from Imhoflot will undergo a second phase of testing with the MMS Leachox process.

The company announced that more than 3.3 million tonnes of tailings stored within its lower tailing’s facility will be tested with Imhoflot Flotation and Leachox Process to potentially recover base metals and precious metals, which could not be obtained with a traditional cell mechanical flotation.

In an interview with MBN, Ralph Shearing, CEO of Altaley Mining Corporation, said that Campo Morado has a particularly difficult metallurgical deposit. It has refractory precious metals, which are hard to recover along with base metals. Shearing explained that traditional flotation cells do not do a good job on micro fine grinded material. Therefore, the company had to resort to different methods such as pneumatic flotation methods.

Altaley has used two methods: the Leachox process from MMS and the Albion process from Core Group. In 2013, Nyrstar, the former owner of the mine, conducted the first phase of testing using the Albion process, which provided very good results. Meanwhile, with the Leachox testing, the company was able to increase gold recoveries to 60 percent and silver recoveries to 80 percent.

Previously, the company reported a 15-18 percent gold and a 30-40 percent recovery. However, in the last months, it has reported recoveries of 25 to 30 percent in gold and up to 50 percent in silver. “We believe there is still a lot of room for improvement using these two technologies. This is a possible new source of income and an opportunity to transform Campo Morado from a zinc mine to a silver mine,” said Shearing.

The data used in this article was sourced from:  
Altaley Mining, MBN
Photo by:   Altaley Mining
Paloma Duran Paloma Duran Junior Journalist and Industry Analyst