Cyanide and Copper Recovery from Barren Solution of the Merrill Crowe Process

José R. Parga; Jesús L. Valenzuela; J. A. Díaz

doi:10.1002/9781118679401.ch28

Cyanide and Copper Recovery from Barren Solution of the Merrill Crowe Process

José R. Parga^*, Jesús L. Valenzuela, J. A. Díaz

^*Corresponding author for this work

Departamento de Ingeniería Química y Metalurgia

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

This paper is a brief overview of the role of inducing the nucleated precipitation of copper and cyanide in a flashtube serpentine reactor, using sodium sulfide as the precipitate and sulfuric acid as pH control. The results showed that pH had a great effect on copper cyanide removal efficiency and the optimum pH was about 3 to 3.5. At this pH value copper cyanide removal efficiency could be achieved above 97 and 99 %, when influent copper concentration ions were 650 and 900 ppm respectively. In this process the cyanide associated with the copper, zinc, iron cyanide complexes are released as HCN gas under strong acidic conditions, allowing it to be recycled back to the cyanidation process as free cyanide.

Original language	English
Title of host publication	REWAS 2013 Enabling Materials Resource Sustainability
Publisher	wiley
Pages	287-294
Number of pages	8
ISBN (Electronic)	9781118679401
ISBN (Print)	9781118605875
DOIs	https://doi.org/10.1002/9781118679401.ch28
State	Published - 25 Feb 2013

Bibliographical note

Publisher Copyright:
© 2013 The Minerals, Metals & Materials Society. All rights reserved.

Keywords

Copper recovery
Cyanide recovery
Precipitation copper

Access to Document

10.1002/9781118679401.ch28

Cite this

@inbook{97667d7a48614edc814eb20b45069d4f,

title = "Cyanide and Copper Recovery from Barren Solution of the Merrill Crowe Process",

abstract = "This paper is a brief overview of the role of inducing the nucleated precipitation of copper and cyanide in a flashtube serpentine reactor, using sodium sulfide as the precipitate and sulfuric acid as pH control. The results showed that pH had a great effect on copper cyanide removal efficiency and the optimum pH was about 3 to 3.5. At this pH value copper cyanide removal efficiency could be achieved above 97 and 99 %, when influent copper concentration ions were 650 and 900 ppm respectively. In this process the cyanide associated with the copper, zinc, iron cyanide complexes are released as HCN gas under strong acidic conditions, allowing it to be recycled back to the cyanidation process as free cyanide.",

keywords = "Copper recovery, Cyanide recovery, Precipitation copper",

author = "Parga, {Jos{\'e} R.} and Valenzuela, {Jes{\'u}s L.} and D{\'i}az, {J. A.}",

year = "2013",

month = feb,

day = "25",

doi = "10.1002/9781118679401.ch28",

language = "Ingl{\'e}s",

isbn = "9781118605875",

pages = "287--294",

booktitle = "REWAS 2013 Enabling Materials Resource Sustainability",

publisher = "wiley",

}

TY - CHAP

T1 - Cyanide and Copper Recovery from Barren Solution of the Merrill Crowe Process

AU - Parga, José R.

AU - Valenzuela, Jesús L.

AU - Díaz, J. A.

PY - 2013/2/25

Y1 - 2013/2/25

N2 - This paper is a brief overview of the role of inducing the nucleated precipitation of copper and cyanide in a flashtube serpentine reactor, using sodium sulfide as the precipitate and sulfuric acid as pH control. The results showed that pH had a great effect on copper cyanide removal efficiency and the optimum pH was about 3 to 3.5. At this pH value copper cyanide removal efficiency could be achieved above 97 and 99 %, when influent copper concentration ions were 650 and 900 ppm respectively. In this process the cyanide associated with the copper, zinc, iron cyanide complexes are released as HCN gas under strong acidic conditions, allowing it to be recycled back to the cyanidation process as free cyanide.

AB - This paper is a brief overview of the role of inducing the nucleated precipitation of copper and cyanide in a flashtube serpentine reactor, using sodium sulfide as the precipitate and sulfuric acid as pH control. The results showed that pH had a great effect on copper cyanide removal efficiency and the optimum pH was about 3 to 3.5. At this pH value copper cyanide removal efficiency could be achieved above 97 and 99 %, when influent copper concentration ions were 650 and 900 ppm respectively. In this process the cyanide associated with the copper, zinc, iron cyanide complexes are released as HCN gas under strong acidic conditions, allowing it to be recycled back to the cyanidation process as free cyanide.

KW - Copper recovery

KW - Cyanide recovery

KW - Precipitation copper

UR - http://www.scopus.com/inward/record.url?scp=85018346531&partnerID=8YFLogxK

U2 - 10.1002/9781118679401.ch28

DO - 10.1002/9781118679401.ch28

M3 - Capítulo

SN - 9781118605875

SP - 287

EP - 294

BT - REWAS 2013 Enabling Materials Resource Sustainability

PB - wiley

ER -

Cyanide and Copper Recovery from Barren Solution of the Merrill Crowe Process

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this