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Aiming at the problems of serious pollution and low efficiency associated with the traditional roasting process for treating low-grade, high-sulfur and refractory gold concentrates, a combined process of oxygen pressure water leaching and cyanidation was proposed. The process parameters were systematically optimized, and the leaching mechanism was investigated. The effects of the process on gold recovery were evaluated through process mineralogical analysis and cyanidation experiments. The results show that under the optimal conditions of temperature of 180 ℃, oxygen partial pressure of 1.5 MPa, leaching time of 120 min, stirring speed of 700 r/min and liquid volume to solid mass ratio of 200∶1, oxygen pressure water leaching can effectively oxidize pyrite and other sulfide minerals into hematite, thereby destroying the encapsulated state of gold. After pretreatment, the gold grade in the leaching residue increases from 42.24 g/t to 63.78 g/t, with an enhancement of over 50%. Process mineralogical analysis indicates that gold is released from sulfides, occurring in exposed or semi-exposed states. The mineral structure becomes loose and porous, and the gold exposure significantly increases, providing a more favorable reaction interface for subsequent cyanidation. Cyanidation experiments further confirm the pretreatment effect, achieving a maximum gold leaching rate of over 99.50%, along with a marked reduction in cyanide consumption. These results demonstrate that oxygen pressure water leaching is an effective pretreatment technology for improving the gold recovery and reducing reagent consumption in low-grade, high-sulfur and refractory gold concentrates, providing technical guidance for the efficient and environmentally friendly utilization of such resources.

, authors=Jiaxing LIU1, Haoyu XIE2, Baisui HAN1, authorsList=Jiaxing LIU, Haoyu XIE, Baisui HAN, authorCompany=null, correspAuthors=Baisui HAN, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1311350582015783489, articleId=1311350581210477119, tenantId=1146029695717560320, journalId=1146120122248306696, language=CN, title=基于氧压水浸预处理的难选金精矿氰化浸出优化研究, columnId=1152626641328501305, journalTitle=湿法冶金, columnName=试验研究, runingTitle=null, highlight=null, articleAbstract=

针对低品位、高硫、难选金精矿采用传统焙烧法处理时存在的污染严重、效率较低等问题,提出了氧压水浸—氰化浸出联合工艺。系统研究并优化了其工艺参数,探讨了浸出机制,并通过工艺矿物学分析及氰化浸出试验评估了该工艺对金回收的影响。结果表明:在温度180 ℃、氧分压1.5 MPa、浸出时间120 min、搅拌速度700 r/min、液固体积质量比200∶1最优工艺条件下,氧压水浸能有效氧化金精矿中的黄铁矿等硫化矿物并生成赤铁矿,从而破坏金的包裹状态;预处理后,浸出渣中金品位由42.24 g/t提升至63.78 g/t,增幅超过50%;工艺矿物学分析结果表明,硫化物中的金被释放,呈裸露或半裸露状态,矿物结构由致密变为疏松,孔隙增大,金颗粒暴露度显著提高,可为后续氰化浸出提供更有利的反应界面。氰化浸出试验进一步验证了预处理效果,金浸出率最高可达99.50%以上,同时氰化剂消耗明显减少。研究结果验证了氧压水浸作为预处理技术,在提升低品位、高硫、难选金精矿的金回收率,以及降低药剂消耗方面的有效性,可为该类资源的高效、绿色回收提供技术参考。

, authors=刘佳兴1, 谢昊宇2, 韩百岁1, authorsList=刘佳兴, 谢昊宇, 韩百岁, authorCompany=null, correspAuthors=韩百岁, authorNote=

刘佳兴(2002—),男,硕士,主要研究方向为硫化矿湿法冶金。

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韩百岁(1987—),男,蒙古族,博士,副教授,主要研究方向为硫化矿湿法冶金。E-mail: 。
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刘佳兴(2002—),男,硕士,主要研究方向为硫化矿湿法冶金。

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刘佳兴(2002—),男,硕士,主要研究方向为硫化矿湿法冶金。

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基于氧压水浸预处理的难选金精矿氰化浸出优化研究
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刘佳兴 1 , 谢昊宇 2 , 韩百岁 1
湿法冶金 | 试验研究 2026,45(2): 183-189
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湿法冶金 |试验研究 2026 , 45 (2) : 183 -189
基于氧压水浸预处理的难选金精矿氰化浸出优化研究
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刘佳兴1, 谢昊宇2, 韩百岁1
作者信息
  • 1.辽宁科技大学 矿业工程学院,辽宁 鞍山 114051
  • 2.方大特钢科技股份有限公司,江西 南昌 330012
通讯作者:
韩百岁(1987—),男,蒙古族,博士,副教授,主要研究方向为硫化矿湿法冶金。E-mail: 。
作者简介:

刘佳兴(2002—),男,硕士,主要研究方向为硫化矿湿法冶金。

Optimization Research on Cyanide Leaching of Refractory Gold Concentrate Based on Oxygen Pressure Water Leaching Pretreatment
Jiaxing LIU1, Haoyu XIE2, Baisui HAN1
Affiliations
  • 1.School of Mining Engineering, University of Science and Technology Liaoning, Anshan 114051, China
  • 2.Fangda Special Steel Technology Co., Ltd., Nanchang 330012, China
出版时间: 2026-04-20 doi: 10.13355/j.cnki.sfyj.2026.02.007
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针对低品位、高硫、难选金精矿采用传统焙烧法处理时存在的污染严重、效率较低等问题,提出了氧压水浸—氰化浸出联合工艺。系统研究并优化了其工艺参数,探讨了浸出机制,并通过工艺矿物学分析及氰化浸出试验评估了该工艺对金回收的影响。结果表明:在温度180 ℃、氧分压1.5 MPa、浸出时间120 min、搅拌速度700 r/min、液固体积质量比200∶1最优工艺条件下,氧压水浸能有效氧化金精矿中的黄铁矿等硫化矿物并生成赤铁矿,从而破坏金的包裹状态;预处理后,浸出渣中金品位由42.24 g/t提升至63.78 g/t,增幅超过50%;工艺矿物学分析结果表明,硫化物中的金被释放,呈裸露或半裸露状态,矿物结构由致密变为疏松,孔隙增大,金颗粒暴露度显著提高,可为后续氰化浸出提供更有利的反应界面。氰化浸出试验进一步验证了预处理效果,金浸出率最高可达99.50%以上,同时氰化剂消耗明显减少。研究结果验证了氧压水浸作为预处理技术,在提升低品位、高硫、难选金精矿的金回收率,以及降低药剂消耗方面的有效性,可为该类资源的高效、绿色回收提供技术参考。

金精矿  /  氧压水浸  /  氰化浸出  /  工艺矿物学

Aiming at the problems of serious pollution and low efficiency associated with the traditional roasting process for treating low-grade, high-sulfur and refractory gold concentrates, a combined process of oxygen pressure water leaching and cyanidation was proposed. The process parameters were systematically optimized, and the leaching mechanism was investigated. The effects of the process on gold recovery were evaluated through process mineralogical analysis and cyanidation experiments. The results show that under the optimal conditions of temperature of 180 ℃, oxygen partial pressure of 1.5 MPa, leaching time of 120 min, stirring speed of 700 r/min and liquid volume to solid mass ratio of 200∶1, oxygen pressure water leaching can effectively oxidize pyrite and other sulfide minerals into hematite, thereby destroying the encapsulated state of gold. After pretreatment, the gold grade in the leaching residue increases from 42.24 g/t to 63.78 g/t, with an enhancement of over 50%. Process mineralogical analysis indicates that gold is released from sulfides, occurring in exposed or semi-exposed states. The mineral structure becomes loose and porous, and the gold exposure significantly increases, providing a more favorable reaction interface for subsequent cyanidation. Cyanidation experiments further confirm the pretreatment effect, achieving a maximum gold leaching rate of over 99.50%, along with a marked reduction in cyanide consumption. These results demonstrate that oxygen pressure water leaching is an effective pretreatment technology for improving the gold recovery and reducing reagent consumption in low-grade, high-sulfur and refractory gold concentrates, providing technical guidance for the efficient and environmentally friendly utilization of such resources.

gold concentrate  /  oxygen pressure water leaching  /  cyanide leaching  /  process mineralogy
刘佳兴, 谢昊宇, 韩百岁. 基于氧压水浸预处理的难选金精矿氰化浸出优化研究. 湿法冶金, 2026 , 45 (2) : 183 -189 . DOI: 10.13355/j.cnki.sfyj.2026.02.007
Jiaxing LIU, Haoyu XIE, Baisui HAN. Optimization Research on Cyanide Leaching of Refractory Gold Concentrate Based on Oxygen Pressure Water Leaching Pretreatment[J]. Hydrometallurgy of China, 2026 , 45 (2) : 183 -189 . DOI: 10.13355/j.cnki.sfyj.2026.02.007
  • 省教育厅项目(JYTMS20230953)
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doi: 10.13355/j.cnki.sfyj.2026.02.007
  • 接收时间:2025-08-30
  • 首发时间:2026-09-28
  • 出版时间:2026-04-20
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  • 收稿日期:2025-08-30
  • 修回日期:2025-10-30
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省教育厅项目(JYTMS20230953)
作者信息
    1.辽宁科技大学 矿业工程学院,辽宁 鞍山 114051
    2.方大特钢科技股份有限公司,江西 南昌 330012

通讯作者:

韩百岁(1987—),男,蒙古族,博士,副教授,主要研究方向为硫化矿湿法冶金。E-mail: 。
参考文献
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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