en.Wedoany.com Reported - Peruvian mining company Minsur has submitted a preliminary environmental assessment to the National Environmental Management Authority, involving the fifth modification of the detailed environmental impact study for the new Kenamari-San Rafael mining unit, with the goal of extending the tin mine's operational life until 2041. The mine, located in the Puno region, has been in continuous operation since 1977 and currently processes 8,280 tonnes of ore per day.
The project plans to expand the effective area of the mining unit from the previously approved 2,682.5 hectares to 4,601.47 hectares. The company stated that the expansion primarily involves its own land, while also encompassing private plots for which usage rights have been obtained, facilitating implementation without altering land ownership status. Optimizing the processing flow is one of the core initiatives, involving the expansion of the concentrator plant to increase daily processing capacity from 3,480 tonnes to approximately 5,000 tonnes, representing a nearly 44% increase in ore throughput, thereby ensuring long-term production rhythm and improving tin recovery efficiency.
Minsur also plans to increase the capacity of the tailings reprocessing plant from approximately 2,500 tonnes per day to nearly 4,200 tonnes per day, adding a sulfide treatment circuit to recover more residual tin, thereby enhancing extraction efficiency and reducing operational losses. The proposal also includes improving tailings storage facilities and constructing new infrastructure to optimize production process efficiency and maximize the recovery levels of tin and associated minerals.
In terms of mining, the company will continue to advance and expand underground operations to access new reserves within the mining unit, focusing on both lateral expansion and developing deeper zones to ensure production continuity. The company will persist with underground mining methods, applying longitudinal and transverse sublevel open stoping techniques, combined with paste backfill and waste rock backfill. Ore will be transported to the processing plant and subsequently sent to the smelter located in Pisco. According to the preliminary plan, engineering and expansion will be implemented in phases, spanning from 2028 to 2041, running concurrently with the mining unit's current operations to ensure that tin production remains unaffected during project execution.
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