This study aimed to investigate the effect of varying pyrite(Py)content on copper(Cu)in the presence of different regrinding conditions,which were altered using different types of grinding media:iron,ceramic balls,and...This study aimed to investigate the effect of varying pyrite(Py)content on copper(Cu)in the presence of different regrinding conditions,which were altered using different types of grinding media:iron,ceramic balls,and their mixture,followed by flotation in the cleaner stage.The flotation performance of rough Cu concentrate can be improved by changing the regrinding conditions based on the Py content.Scanning electron microscopy,X-ray spectrometry,ethylenediaminetetraacetic acid disodium salt extraction,and X-ray photoelectron spectroscopy studies illustrated that when the Py content was high,the use of iron media in regrinding promoted the generation of hydrophilic Fe OOH on the surface of Py and improved the Cu grade.The ceramic medium with a low Py content prevented excessive Fe OOH from covering the surface of chalcopyrite(Cpy).Electrochemical studies further showed that the galvanic corrosion current of Cpy-Py increased with the addition of Py and became stronger with the participation of iron media.展开更多
2024年10月,Lancet与JAMA分别发表了关于社交媒体对青少年精神健康影响的社论——《Unhealthy influencers?Social Media and Youth Mental Health》和《Social Media and Suicide Risk in Youth》。文章指出,在过去15年,随着社交媒体...2024年10月,Lancet与JAMA分别发表了关于社交媒体对青少年精神健康影响的社论——《Unhealthy influencers?Social Media and Youth Mental Health》和《Social Media and Suicide Risk in Youth》。文章指出,在过去15年,随着社交媒体使用频率的增加,10~24岁人群的精神疾病患病率及自我伤害行为出现显著增长的现象。展开更多
基金financially supported by the National Key Research and Development Plan of China(No.2022YFC2904603)the National Natural Science Foundation of China(No.52174268)。
文摘This study aimed to investigate the effect of varying pyrite(Py)content on copper(Cu)in the presence of different regrinding conditions,which were altered using different types of grinding media:iron,ceramic balls,and their mixture,followed by flotation in the cleaner stage.The flotation performance of rough Cu concentrate can be improved by changing the regrinding conditions based on the Py content.Scanning electron microscopy,X-ray spectrometry,ethylenediaminetetraacetic acid disodium salt extraction,and X-ray photoelectron spectroscopy studies illustrated that when the Py content was high,the use of iron media in regrinding promoted the generation of hydrophilic Fe OOH on the surface of Py and improved the Cu grade.The ceramic medium with a low Py content prevented excessive Fe OOH from covering the surface of chalcopyrite(Cpy).Electrochemical studies further showed that the galvanic corrosion current of Cpy-Py increased with the addition of Py and became stronger with the participation of iron media.
文摘2024年10月,Lancet与JAMA分别发表了关于社交媒体对青少年精神健康影响的社论——《Unhealthy influencers?Social Media and Youth Mental Health》和《Social Media and Suicide Risk in Youth》。文章指出,在过去15年,随着社交媒体使用频率的增加,10~24岁人群的精神疾病患病率及自我伤害行为出现显著增长的现象。
