工程科学学报，第41卷，第9期：1127-1134,2019年9月 Chinese Journal of Engineering,Vol.41,No.9:1127-1134,September 2019 DOI:10.13374/j.issn2095-9389.2019.09.003;http://journals.ustb.edu.cn 次生硫化铜矿制粒试验 尹升华12)，陈威2)四，刘家明2)，宋庆2) 1)北京科技大学金属矿山高效开采与安全教育部重点实验室，北京1000832)北京科技大学土木与资源工程学院，北京100083 ☒通信作者，E-mail:ustbchenwei(@126.com 摘要为解决堆浸过程中由于大量矿粉存在而导致矿堆渗透性差、浸出率低等问题，以次生硫化铜矿为原料，开展了制粒 试验研究.考察了不同制粒黏结剂对矿粉的黏结效果，确定了最佳的制粒黏结剂、制粒工艺以及制粒方法.通过正交制粒试 验，明确了影响制粒试验的主要因素.试验结果表明：不同制粒黏结剂的黏结效果排序依次为：SS-2>SS-3>水泥>半水 石膏>SFS-1>SFS-0>硅酸钠>阳离子型聚丙烯酰胺.当选用黏结剂SFS-2,黏结剂占矿粉质量分数为8%、加酸量为25kg· t1以及制粒过程喷水质量分数为30%时，所制矿团效果最佳.其湿强度达到94.62%，抗压强度达到417.44N,矿团酸浸维持 完好时间超过25d,矿团形态基本维持不变，无明显破裂现象.正交制粒试验得到多因素对次生硫化铜矿制粒的影响由大到 小依次为：黏结剂占矿石质量分数、加酸量和制粒喷水量.对选定的黏结剂进行细菌接种试验显示，黏结剂对细菌群落无明显 影响.添加黏结剂试验组细菌数量为8.79×10？mL1,未添加黏结剂试验组细菌数量为8.86×10？mL.对制粒后矿团进行 浸矿试验结果显示，矿粉制粒后铜浸出率提高了12.74%，制粒通过增大矿物之间的孔隙，增加浸出液与矿石的接触，进而提 高铜浸出率. 关键词制粒黏结剂：湿强度：抗压强度：次生硫化铜矿：生物浸矿 分类号TD862 Agglomeration experiment of secondary copper sulfide ore YIN Sheng-hua'),CHEN Wei),LIU Jia-ming?,SONG Qing? 1)Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal,University of Science and Technology Beijing,Beijing 100083, China 2)School of Civil and Resource Engineering,University of Science and Technology Beijing.Beijing 100083.China Corresponding author,E-mail:ustbchenwei@126.com ABSTRACT The presence of a large amount of fine particles and muddy ore during the heap leaching process leads the occurrence of low leaching rate.Herein,agglomeration experiments using low-grade secondary copper sulfide ore were conducted to enhance the poor heap permeability and low leaching rate caused by the presence of a large amount of fine particles during the heap leaching process. The optimum binder,agglomeration technology,and agglomeration method were selected after investigating the bonding effects of differ- ent binders on mineral particles.The effect of single factor,including the binder mass fraction,acid quality,and bulk of water spra- ying on agglomeration experiments were conducted before the orthogonal experiment.The key factors that have a considerable effect on agglomeration were identified through the orthogonal experiment.According to the experimental results,the order of bonding effect of different granulation binders is as follows:SFS-2>SFS-3>cement hemihydrate gypsum>SFS-1>SFS-0>sodium silicate cation- ic polyacrylamide.The effect of agglomeration is the best when SFS-2 is selected as a binder,the acid quality is measured as 25 kg t,and the mass fraction of spraying water is 30%during the agglomeration process.The wet strength and compressive strength rea- 收稿日期：2019-04-15 基金项目：国家优秀青年科学基金资助项目(51722401)：国家自然科学基金重点资助项目(51734001)：中央高校基本科研业务费专项资金资 助项目(FRF-TP-18-003C1)工程科学学报,第 41 卷,第 9 期:1127鄄鄄1134,2019 年 9 月 Chinese Journal of Engineering, Vol. 41, No. 9: 1127鄄鄄1134, September 2019 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2019. 09. 003; http: / / journals. ustb. edu. cn 次生硫化铜矿制粒试验 尹升华1,2) , 陈 威1,2) 苣 , 刘家明2) , 宋 庆2) 1)北京科技大学金属矿山高效开采与安全教育部重点实验室, 北京 100083 2)北京科技大学土木与资源工程学院, 北京 100083 苣通信作者, E鄄mail:ustbchenwei@ 126. com 摘 要 为解决堆浸过程中由于大量矿粉存在而导致矿堆渗透性差、浸出率低等问题,以次生硫化铜矿为原料,开展了制粒 试验研究. 考察了不同制粒黏结剂对矿粉的黏结效果,确定了最佳的制粒黏结剂、制粒工艺以及制粒方法. 通过正交制粒试 验,明确了影响制粒试验的主要因素. 试验结果表明:不同制粒黏结剂的黏结效果排序依次为:SFS鄄鄄2 > SFS鄄鄄3 > 水泥 > 半水 石膏 > SFS鄄鄄1 > SFS鄄鄄0 > 硅酸钠 > 阳离子型聚丙烯酰胺. 当选用黏结剂 SFS鄄鄄2,黏结剂占矿粉质量分数为 8% 、加酸量为 25 kg· t - 1以及制粒过程喷水质量分数为 30% 时,所制矿团效果最佳. 其湿强度达到 94郾 62% ,抗压强度达到 417郾 44 N,矿团酸浸维持 完好时间超过 25 d,矿团形态基本维持不变,无明显破裂现象. 正交制粒试验得到多因素对次生硫化铜矿制粒的影响由大到 小依次为:黏结剂占矿石质量分数、加酸量和制粒喷水量. 对选定的黏结剂进行细菌接种试验显示,黏结剂对细菌群落无明显 影响. 添加黏结剂试验组细菌数量为 8郾 79 伊 10 7 mL - 1 ,未添加黏结剂试验组细菌数量为 8郾 86 伊 10 7 mL - 1 . 对制粒后矿团进行 浸矿试验结果显示,矿粉制粒后铜浸出率提高了 12郾 74% ,制粒通过增大矿物之间的孔隙,增加浸出液与矿石的接触,进而提 高铜浸出率. 关键词 制粒黏结剂; 湿强度; 抗压强度; 次生硫化铜矿; 生物浸矿 分类号 TD862 收稿日期: 2019鄄鄄04鄄鄄15 基金项目: 国家优秀青年科学基金资助项目(51722401);国家自然科学基金重点资助项目(51734001);中央高校基本科研业务费专项资金资 助项目(FRF鄄鄄TP鄄鄄18鄄鄄003C1) Agglomeration experiment of secondary copper sulfide ore YIN Sheng鄄hua 1,2) , CHEN Wei 1,2) 苣 , LIU Jia鄄ming 2) , SONG Qing 2) 1)Key Laboratory of Ministry of Education for High鄄Efficient Mining and Safety of Metal, University of Science and Technology Beijing, Beijing 100083, China 2)School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China 苣Corresponding author, E鄄mail: ustbchenwei@ 126. com ABSTRACT The presence of a large amount of fine particles and muddy ore during the heap leaching process leads the occurrence of low leaching rate. Herein, agglomeration experiments using low鄄grade secondary copper sulfide ore were conducted to enhance the poor heap permeability and low leaching rate caused by the presence of a large amount of fine particles during the heap leaching process. The optimum binder, agglomeration technology, and agglomeration method were selected after investigating the bonding effects of differ鄄 ent binders on mineral particles. The effect of single factor, including the binder mass fraction, acid quality, and bulk of water spra鄄 ying on agglomeration experiments were conducted before the orthogonal experiment. The key factors that have a considerable effect on agglomeration were identified through the orthogonal experiment. According to the experimental results, the order of bonding effect of different granulation binders is as follows: SFS鄄鄄2 > SFS鄄鄄3 > cement > hemihydrate gypsum > SFS鄄鄄1 > SFS鄄鄄0 > sodium silicate > cation鄄 ic polyacrylamide. The effect of agglomeration is the best when SFS鄄鄄2 is selected as a binder, the acid quality is measured as 25 kg· t - 1 , and the mass fraction of spraying water is 30% during the agglomeration process. The wet strength and compressive strength rea鄄