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滤材沉积法回收贫液中载金粉炭试验研究
- 作者：
- 张嘉乐|李沛|沈鑫|苗腾飞|李阳|张俊南|曹钊
- 作者单位：
- 内蒙古科技大学矿业与煤炭学院|内蒙古科技大学矿业与煤炭学院|内蒙古太平矿业有限公司|内蒙古太平矿业有限公司|内蒙古科技大学矿业与煤炭学院|内蒙古科技大学矿业与煤炭学院|内蒙古科技大学矿业与煤炭学院
基金项目：
- 内蒙古自治区重点研发和科技成果转化项目(2022YFHH0050)
详细信息：
- 作者简介：
- 张嘉乐(1995—),男,硕士研究生,研究方向为黄金选矿;E-mail:3378563385@qq.com
- 通讯作者：
- 曹钊(1985—),男,教授,从事复杂多金属和稀贵金属选矿研究工作;E-mail:caozhao1217@163.com
- PDF下载
Experimental study on the recovery of gold-loaded powdered carbon from barren solution by filter material deposition method
- English Author：
- School of Mining and Coal,Inner Mongolia University of Science and Technology|School of Mining and Coal,Inner Mongolia University of Science and Technology|Inner Mongolia Pacific Mining Co.,Ltd.|Inner Mongolia Pacific Mining Co.,Ltd.|School of Mining and Coal,Inner Mongolia University of Science and Technology|School of Mining and Coal,Inner Mongolia University of Science and Technology|School of Mining and Coal,Inner Mongolia University of Science and Technology
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
内蒙古某金矿每年随贫液上浸堆的固体量约73 t,其中粉炭量约40 t,吨炭载金量约373 g,金随粉炭流失的同时,堆上浸出的金还被粉炭截留,采用管道中布置滤袋效果不理想?试验采用滤材沉积方式捕收贫液中粉炭,即将滤材折叠形成一定构型,放入贫液池使粉炭自然沉积?针对粉炭和贫液性质选择3种滤材,并进行表面粗糙度测试,通过试验对比粉炭在不同滤材的沉积效果,发现沉积能力与滤材表面粗糙度呈正相关;通过沉积动力学试验,探明沉积率随时间先增后降,且沉积能力受滤材孔径影响,孔径为粉炭粒径D80的1.5倍时最佳;采用高压气水联合脱附沉积粉炭?结果表明:20 μm聚丙烯无纺滤材沉积16 h效果最佳,单位面积沉积量为79.31 g/m2,贫液流经沉积单元所含粉炭量40 %可被捕收,脱附率达88.7 %,综合回收率达35.5 %,且脱附后滤材有较好的二次使用性?研究结果对采用活性炭作为吸附剂的堆浸工艺均有一定的借鉴意义?
关键词:
粉炭;活性炭粉化;滤材沉积;堆浸工艺;微细粒捕收
Abstract:
A gold mine in Inner Mongolia produces about 73 t solid waste annually that runs up the leaching heap with barren solution,of which about 40 t is powdered carbon with a gold loading of 373 g per ton.While gold is lost along with the powdered carbon,some gold is also captured by the powdered carbon during heap leaching.The filter bags arranged in a pipeline layout are not satisfactory.In this study,the filter material deposition method was employed to collect the powdered carbon from the barren solution.The filter material was folded into a certain shape and placed in a barren solution tank for the natural deposition of the carbon.3 types of filter materials were selected based on the properties of the powered carbon and barren solution,and surface roughness tests were conducted.The effects of different filter materials on the powered carbon deposition were compared through experiments,and it was found that the deposition capacity was positively correlated with the surface roughness of the filter material.The deposition rate was determined through kinetic experiments,showing an initial increase and then a decrease over time.The deposition capacity was affcted by the filter material pore size,with the best performance observed when the pore size was 1.5 times the powdered carbon particle size D80.A combined gas-water desorption method was used to recover the deposited powered carbon.The results showed that the deposition of 20 μm polypropylene non-woven filter material for 16 h yie-lded the best performance,with a unit area deposition amount of 79.31 g/m2.About 40 % of the powered carbon content can be captured when the barren solution passes through the deposition unit,and the desorption rate reaches 88.7 %.The overall recovery rate was 35.5 %.The filter material also exhibited good reusability after desorption.The research findings have certain reference significance for heap leaching processes that use activated carbon as an adsorbent.
Keywords:
powdered carbon;activated carbon pulverization;filter material deposition;heap leaching process;fine particle collection
