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Gold Science and Technology >

2023 , Vol. 31 >Issue 4: 689 - 697

DOI: https://doi.org/10.11872/j.issn.1005-2518.2023.04.064

Mining Technology and Mine Management

Production Practice of JRF Micro-bubble Flotation on Carlin Types Gold Ore in Guizhou

  • Keqi PENG ,
  • Ruixian ZHOU
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  • Guizhou Zijin Mining Co. ，Ltd. ，Zhenfeng 562200，Guizhou，China

Received date: 2022-05-10

  Revised date: 2022-06-12

  Online published: 2023-09-20

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Abstract

The raw ore of a carlin gold mine in Guizhou has low gold grade，fine disseminated granularity of valuable minerals and gangue minerals，and high content of harmful elements arsenic and carbon.The recovery rate of conventional fine grinding flotation process is only 80.54% and the gold grade of tailing is 0.97×10-6，the loss of flotation tailing gold is relatively serious.In order to improve the recovery rate of gold concentrate and reduce the gold grade of flotation tailing，the process mineralogy study of secondary grinding classification overflow and flotation tailing was carried out to find out the gold distribution and loss.The results show that the gold lost in conventional fine grinding flotation tailing is mainly sulfide wrapped gold，which is mainly lost in the poor coenobium of -38 μm grade，accounting for 60.70%，and the lost sulfide gold content is high.Secondly，there are a small amount of dissociated monomer and a small amount of fusant，which are not fully recovered due to the fine particle size，and also lost in the tailings.The main cause of the loss of gold in flotation tailing is that the fine particle minerals cannot be caught by conventional fine grinding flotation.Combined with the site production situation，the JRF micro-bubble flotation was applied to rough selection Ⅰ operation and scavenge Ⅳ tailing for reselection test.The test results show that JRF micro-bubble flotation has a significant catching effect on some fine particle minerals in tailing，which can further strengthen the capture of sulfide poor coenobium of -38 μm grade and a amount dissociation monomer of -20 μm grade in conventional fine grinding flotation scavenge Ⅳ tailing，and reduce the loss of gold in flotation tailing.After the technical transformation，the cumulative recovery rate of gold is 82.39% and the tailing grade is 0.88×10-6.The recovery rate increased by 1.85 percentage points，and the tailing grade decreased by 0.09×10-6，and the flotation index was gradually improved，which increased the economic benefits of enterprises.

Key words： gold; process mineralogy; JRF micro-bubble flotation; flotation tailing; recovery; fine particles

Cite this article

Keqi PENG , Ruixian ZHOU . Production Practice of JRF Micro-bubble Flotation on Carlin Types Gold Ore in Guizhou[J]. Gold Science and Technology, 2023 , 31(4) : 689 -697 . DOI: 10.11872/j.issn.1005-2518.2023.04.064

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广东省上半年完成历史遗留矿山生态修复874.37 hm2

据7月27日报道，2023年上半年，广东省自然资源厅大力推进国土空间生态修复，在历史遗留矿山生态修复、全域土地综合整治等方面取得一系列成效。

在推进山水林田湖草沙系统治理方面，2023年度，广东省级生态修复专项资金支持项目预算下达额度共计23 000万元，已实际支出资金2 745.27万元。

根据《广东省自然资源厅 广东省林业局关于加强历史遗留矿山生态修复推进绿美广东生态建设的通知》，2023年下达历史遗留矿山生态修复任务2 500 hm2。截至2023年6月，广东省历史遗留矿山生态修复完成874.37 hm2，完成率为86.59%。

近年来，广东省部署了42个全域土地综合整治试点，计划开展项目1 192个。目前，有37个试点已经动工，完成农用地整理2 173.93 hm2，建设用地整理507.27 hm2，生态保护修复2 353.94 hm2。

为确保工作任务按期按质完成，广东省自然资源厅提出，要切实压实主体责任，将目标任务化、任务责任化、责任节点化，严格履行工作职责，扎实推动各项生态修复工作任务完成。对生态保护修复工作进度滞后的地市要定期开展任务自评，强化实地调研，坚持找差距、补短板、抓落实，逐个项目跟进；对工作推进不力的重点地市，将视情约谈通报。

http://www.goldsci.ac.cn/article/2023/1005-2518/1005-2518-2023-31-4-689.shtml

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