Increasing leaching rate of gold cyanide of two-stage calcination generated from refractory ore containing arsenopyrite and pyrrhotite

For the gold locked within hematite in the two- stage calcination, which leads to a low gold leaching rate, the present work is aiming at pretreating the calcination to selectively dissolve hematite. The calcination was pre- treated by sulfuric acid with cosolvent B. The factors in- fluencing the he...

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Bibliographic Details
Published inRare metals Vol. 35; no. 10; pp. 804 - 810
Main Authors Dang, Xiao-E, Ke, Wen-Shuai, Tang, Chen, Lv, Jun, Zhou, Xue, Liu, Cheng-Peng
Format Journal Article
LanguageEnglish
Published Beijing Nonferrous Metals Society of China 01.10.2016
Springer Nature B.V
Subjects
Arsenic
Arsenopyrite
Biomaterials
Calcination
Chemistry and Materials Science
Cyanide process
Cyanides
Dissolution
Energy
Energy consumption
Gold
Gold cyanide
Hematite
High temperature
Leaching
Materials Engineering
Materials Science
Metallic Materials
Metallurgy
Mineralogy
Nanoscale Science and Technology
Oxidation
Physical Chemistry
Plant layout
Pretreatment
Pyrrhotite
Raw materials
Refractory ores
Residues
Roasting
Sulfur
Sulfuric acid
毒砂
氰化金
浸出时间
煅烧
矿石
磁黄铁矿
酸预处理
金浸出率
Hematite
Locked gold
Cosolvent B
Pretreatment
Two-stage calcination
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Summary:For the gold locked within hematite in the two- stage calcination, which leads to a low gold leaching rate, the present work is aiming at pretreating the calcination to selectively dissolve hematite. The calcination was pre- treated by sulfuric acid with cosolvent B. The factors in- fluencing the hematite dissolution rate were studied, and the pretreatment parameters considered were H2SO4 con- tent, B dosage and added time, leaching temperature and time. Simultaneously, mineralogy analysis of the calcination, H2SO4 pretreatment residue and cyanide leaching residue were also carried out. Results indicate that the hematite dissolution rate is quicker, the dissolution tem- perature is lower and the dissolution time is shorter in the role of cosolvent B than without B. At the same time, the gold locked within hematite is effectively released, so the leaching rate of gold cyanide increases about 10 % than that in actual factory production. The results have an actual significance in guiding industrial production.
Bibliography:Locked gold; Hematite; Pretreatment;Two-stage calcination; Cosolvent B
For the gold locked within hematite in the two- stage calcination, which leads to a low gold leaching rate, the present work is aiming at pretreating the calcination to selectively dissolve hematite. The calcination was pre- treated by sulfuric acid with cosolvent B. The factors in- fluencing the hematite dissolution rate were studied, and the pretreatment parameters considered were H2SO4 con- tent, B dosage and added time, leaching temperature and time. Simultaneously, mineralogy analysis of the calcination, H2SO4 pretreatment residue and cyanide leaching residue were also carried out. Results indicate that the hematite dissolution rate is quicker, the dissolution tem- perature is lower and the dissolution time is shorter in the role of cosolvent B than without B. At the same time, the gold locked within hematite is effectively released, so the leaching rate of gold cyanide increases about 10 % than that in actual factory production. The results have an actual significance in guiding industrial production.
11-2112/TF
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-015-0470-0