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| 某高硫微细粒金矿选冶试验研究 |
| Experimental study on beneficiation and metallurgy of a high sulfur micro fine grained gold deposit |
| Received:July 11, 2022 |
| DOI： |
| 中文关键词: 高硫 微细粒金矿 中矿再磨 精矿再磨 超细磨 碱浸 |
| 英文关键词: high sulfur fine grained gold deposit middling regrinding regrinding of concentrate superfine grinding alkali leaching |
| 基金项目: |
| Author Name | Affiliation | | CHEN Yanbo | Selection and Metallurgy Laboratory, Shandong Gold Mining Technology Co. Ltd., Yantai 261441, Shandong, China | | LI Guangsheng | Selection and Metallurgy Laboratory, Shandong Gold Mining Technology Co. Ltd., Yantai 261441, Shandong, China | | ZHU Xingfu | Selection and Metallurgy Laboratory, Shandong Gold Mining Technology Co. Ltd., Yantai 261441, Shandong, China |
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| 中文摘要: |
| 某高硫金矿中金矿物与黄铁矿紧密共生，金矿物和黄铁矿平均粒径分别为3.58和32.80 μm，嵌布粒度较细，在实际生产中精矿品位和回收率均不理想。为进一步提高精矿品位和回收率，针对该矿特点，确定黄铁矿为浮选目标矿物，通过系统条件试验和精选试验得到了最优浮选工艺流程和参数，继而开展开路试验和闭路试验，得到的浮选指标并不理想。基于中矿中黄铁矿多是连生体的判断，对浮选中矿进行再磨处理，获得了精矿金品位17.4 g/t、金回收率80.66%的满意指标。同时，结合“超细磨”、“碱浸预处理”工艺，对浮选精矿进行浸出试验，得到金浸出率77%的满意指标，为生产现场提供了具有指导意义的技术方案。 |
| 英文摘要: |
| The gold minerals in a high sulfur gold deposit are closely associated with pyrite, and the average particle sizes of gold ore and pyrite are 3.58 and 32.80 μm, respectively. The embedded particle size is fine. The concentrate grade and recovery are not satisfactory in actual production. In order to further improve the concentrate grade and recovery rate, pyrite was determined as the flotation target mineral in this experimental study according to the characteristics of the mine, The optimal flotation process and parameters were obtained through the system condition test and beneficiation test, and then the open circuit test and closed-circuit test were carried out. But the flotation indexes resulted from the tests were not ideal. Based on the judgment that pyrite in middling ore is mostly conjoined, the flotation middling was reground, and the satisfactory indexes of a concentrate gold grade of 17.4 g/t and a gold recovery of 80.66% were achieved. Combined with the processes of "ultra-fine grinding" and "alkali leaching pretreatment", the leaching test of flotation concentrate yielded a satisfactory index of gold leaching rate of 77%, providing a valuable reference for the production sites. |
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