Ingeniero Civil

Páginas: 17 (4215 palabras) Publicado: 15 de octubre de 2012
Metalliferous Mining - Processing
Elution & Carbon Reactivation
Resource Book
E L U T I O N & C A R B O N R E A C T I V A T I O N
2
Table of Contents
TABLE OF CONTENTS............................................................................................................................ 2
INTRODUCTION TO ELUTION AND CARBONREACTIVATION......................................................................... 3
What is this module about?..................................................................................................................... 3
What will you learn in this module? ....................................................................................................... 3
What do you have to do to complete this unit?....................................................................................... 3
What resources can you use to help?...................................................................................................... 3
INTRODUCTION ........................................................................................................................................... 4
ELUTION THEORYFUNDAMENTALS................................................................................................ 4
ELUTION THEORY FUNDAMENTALS ............................................................................................................ 5
SPLIT ‘ANGLO AMERICAN RESEARCH LABORATORIES’ (AARL) ELUTION PROCESS STAGES ..................... 6
ELUTION CIRCUITCOMPONENTS................................................................................................................. 9
CARBON REACTIVATION THEORY............................................................................................................. 11
THERMAL REACTIVATION......................................................................................................................... 13
FACTORS AFFECTING THERMAL REACTIVATIONEFFICIENCY.................................................................... 15
REACTIVATION CIRCUIT COMPONENTS AND PROCESS FLOW.................................................................... 16
E L U T I O N & C A R B O N R E A C T I V A T I O N
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Introduction to Elution and Carbon Reactivation
What is this module about?
This unit is about how we manage and use Elution and CarbonReactivation within
the processing plant
What will you learn in this module?
Demonstrate an understanding of elution theory fundamentals.
Demonstrate an understanding of the purpose and action of each stage of the
AARL process as applied at SDGM.
Identify the key elution circuit components.
Demonstrate an understanding of carbon reactivation theory.
Demonstrate an understanding of thefactors affecting thermal reactivation
efficiency.
Identify and describe the purpose of the HVS screen, VFB screen, Reactivation
kiln and carbon eduction vessel.
What do you have to do to complete this unit?
You will need to complete all the training tasks in your workbook, the review
exercise and the assessment given to you by your supervisor.
Discuss the competency standards for thisunit with the Training Coordinator or your
supervisor.
What resources can you use to help?
If you need more information about topics in this unit, then you should approach:
Your work mates and supervisor
The training coordinator
Metallurgists
E L U T I O N & C A R B O N R E A C T I V A T I O N
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Introduction
During the CIL process, gold is leached from the ore using an alkalinecyanide solution. The
resulting gold cyanide complex ions are then concentrated and separated from the slurry by
adsorbing onto activated carbon. Elution is the next step in the process, whereby the adsorption
of the gold cyanide complex onto carbon is reversed.
Loaded carbon is removed from the CIL circuit and the gold stripped from the carbon using a
number of treatment steps. The result...
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