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[期刊论文]

Understanding the mechanism of microcrack-enhanced bioleaching of copper

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author:

Zhong, Wen (Zhong, Wen.) [1] | Zhong, Shuiping (Zhong, Shuiping.) [2] (Scholars:衷水平) | Tang, Ding (Tang, Ding.) [3] | Unfold

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EI Scopus SCIE

Abstract:

Investigations on the microcrack distribution characteristics and bioleaching behaviors of particles were con-ducted to obtain better bioleaching efficiency and deepen the mechanism understanding. Results indicate that comminution by high-pressure grinding roll (HPGR) is the desirable method for obtaining particles with more abundant and wider microcracks. Fixing the HPGR pressure at 4 MPa results in the highest bioleaching efficiency for copper extraction, namely 86% for the shaking flask bioleaching (particle size: <1.7 mm) and 52% for the column bioleaching of particles (particle size: 3.35-6.7 mm). The suggested model for reaction kinetics of microcrack-containing particles implies that more abundant and wider microcracks can promote the exposure of both Cu-containing phases and ferrous iron as well as solution infiltration, as evidenced by the COMSOL simulation results and bacteria proliferation analysis. The results highlight the importance of microcracks for enhancing the bioleaching process and provide insights for the mechanism understanding.

Keyword:

Bioleaching Copper extraction Copper sulfide ore Hydrometallurgy Microcracks

Community:

  • [ 1 ] [Zhong, Wen]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 2 ] [Zhong, Shuiping]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 3 ] [Chi, Xiaopeng]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 4 ] [Weng, Wei]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 5 ] [Zhong, Shuiping]Fuzhou Univ, Fujian Key Lab Green Extract & High Value Utilizat, Fuzhou 350108, Peoples R China
  • [ 6 ] [Chi, Xiaopeng]Fuzhou Univ, Fujian Key Lab Green Extract & High Value Utilizat, Fuzhou 350108, Peoples R China
  • [ 7 ] [Weng, Wei]Fuzhou Univ, Fujian Key Lab Green Extract & High Value Utilizat, Fuzhou 350108, Peoples R China
  • [ 8 ] [Zhong, Shuiping]Zijin Min Grp Co Ltd, Fujian 364200, Peoples R China
  • [ 9 ] [Tang, Ding]Zijin Min Grp Co Ltd, Fujian 364200, Peoples R China
  • [ 10 ] [Zhong, Shuiping]State Key Lab Comprehens Utilizat Low Grade Refrac, Fujian 364200, Peoples R China
  • [ 11 ] [Tang, Ding]State Key Lab Comprehens Utilizat Low Grade Refrac, Fujian 364200, Peoples R China

Reprint 's Address:

  • [Zhong, Shuiping]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China;;

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Source :

HYDROMETALLURGY

ISSN: 0304-386X

Year: 2023

Volume: 218

4 . 8

JCR@2023

4 . 8 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:49

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 4

SCOPUS Cited Count: 4

30 Days PV: 1

Online/Total:371/10203450
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