In collaboration with the Artisanal Gold Council and Cordy Geosciences, and with funding from the U.S. Department of State, this project has developed materials for training miners on technical alternatives and improvements that can be introduced to ASGM operations. These materials were designed with the goal of helping to improve efficiency in the mining process to increase gold recovery while simultaneously reducing the reliance on mecury in ASGM.
The materials include videos that can be used in the classroom as well as lecture material and a series of activities that can be used to develop an 'ideal' mineral processing plant.
The First Step to Improved Mining
Proper crushing and milling of ore is the critical first step in ensuring maximum gold recovery. In this video, crushing and milling techniques are reviewed. The video also illustrates the importance of conducting a gold liberation test to optimize milling time.
(versión en Español)
Steps for Improving Gold Recovery
Mineral concentration is a critical step in the chain of production. The process focuses on separating the target mineral, gold, from other non-target minerals. Efficient concentration can effectively eliminate the need for mercury. The technology available depends on a variety of factors including the mineralogy of the ore and the financial capacity available to miners.
(versión en Español)
Resources for Miners and Trainers
Artisanal Gold Council and Cordy Geosciences, in collaboration with Red Social, coordinated a miner training workshop in Abancay, Peru. At the workshop, miners were given training on how to optimize mineral processing while minimizing the need for mercury use. A variety of case studies were shared that highlighted examples from around the world where miners have optimized gold extraction while reducing and in some cases eliminating the need for mercury.
Case Studies of Successful Approaches for Reducing Mercury
Case Study: Piura, Peru
Case Study: Brazil — Tapajos River Basin, Itaituba
Case Study: Ecuador — Portovelo, El Oro Province in Southern Ecuador
Case Study: Ecuador — Plan Cero Mercurio
Case Study: Puyango-Tumbes Binational Watershed
Case Study: La Segovia, Colombia
Database of ASGM Projects in South America
© 2021 Biodiversity Research Institute is a 501(c)3 non-profit