Metal extraction from ores by heap leaching

被引：39

作者：

Bartlett, RW

机构：

[1] College of Mines and Earth Resources, University of Idaho

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 1997年 / 28卷 / 04期

关键词：

Pyrite; Material Transaction; Intrinsic Permeability; Rock Size; Percolation Leaching;

D O I：

10.1007/s11663-997-0026-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Heap leaching low-grade ores has become a major contributor to the extraction of economically important metals, notably copper and gold. The state-of-the-art in heap leaching is reviewed with emphasis on process engineering. Rock leaching, including rock pore diffusion and mineral kinetics, solution flow, and retention in ore heaps during percolation leaching, and bio-oxidation of sulfidic ores are covered. Oxygen transport into heaps by gaseous diffusion, natural convection, and forced air ventilation is discussed. Strategies for optimizing heap leaching include ore crushing, ore agglomeration, low-cost air ventilation of sulfide ore heaps:undergoing bio-oxidation using fans, and the use of aggregate metal extraction rate constants in making metallurgical business decisions about heap leaching.

引用

页码：529 / 545

页数：17

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