Effect of compaction on binder performance in copper heap leaching

Heap leaching efficiency is compromised by suboptimal solution flow characteristics such as channeling and ponding, primarily attributed to compaction and fines migration. This study addresses the challenges posed by these factors and explores the potential of agglomerating ore to mitigate compaction and immobilize fines. The objective was to develop quantitative procedures to evaluate the effectiveness of acid-resistant binders in stabilizing agglomerates suitable for copper heap leaching. Through laboratory experiments simulating real heap conditions, several binders were identified that produced agglomerates resilient to compaction in acidic environments. The research highlights that effective binding can directly improve the permeability and overall recovery rates in heap leaching operations, as the qualitative assessment methods previously relied upon were inadequate. Results indicate a clear correlation between binder properties and the performance of agglomerates under compaction stress in simulated leaching scenarios. This work provides valuable insights for optimizing copper heap leaching processes, paving the way for enhanced recovery methods in mining operations.