中国科技核心期刊
美国化学文摘社(CAS)数据库
美国EBSCO学术数据库
日本科学技术振兴机构数据库(JST)
马辉|伊山廷|袁朝新|郭持皓|梁东东|曹佳旭|李拓夫
Ma Hui, Yi Shanting, Yuan Chaoxin, Guo Chihao, Liang Dongdong, Cao Jiaxu, Li Tuofu
难处理金矿占世界金矿总资源量的三分之二左右,在可以预见的未来,金、银等贵金属的获取将依赖于难处理矿石的开采及提取。随着新质生产力概念的提出,传统冶金行业需要开发更加高效的工艺进行生产。对某难处理金矿进行矿物性质分析,以及直接浸金试验与加压氧化预处理后浸金试验。直接浸金试验研究了磨矿细度、浸金药剂种类、反应时间等因素的影响,在最佳试验条件下金浸出率为4827 %;加压氧化预处理后浸金试验研究了加压氧化过程中体系、温度、酸耗及停留时间等因素的影响,得到最佳预处理条件为浓硫酸介质,添加量180 kg/t,反应温度260 ℃,氧分压03 MPa,总压力50 MPa,釜内停留时间2.5 h,矿浆浓度40 %,获得金浸出率为8406 %,为难处理金矿浸金提供了依据。
Refractory gold ores account for approximately two-thirds of the world’s total gold resources.In the foreseeable future,the acquisition of precious metals such as gold and silver will rely on the mining and extraction of these refractory ores.With the introduction of the concept of new quality productive forces,the traditional metallurgy industry must develop more efficient processes for production.Mineral property analysis,direct gold leaching experiments,and gold leaching tests after pressurized oxidation pretreatment were carried out on a refractory gold ore.The direct leaching experiment studied the influence of grinding fineness,leaching reagent type,and reaction time.Under the optimal experimental conditions,the gold extraction rate was 48.27 %.The pressurized oxidation pretreatment leaching test investigated the influence of factors such as systems,temperatures,acid consumption,and retention time during the pressurized oxidation process.The optimal pretreatment conditions were found to be a concentrated sulfuric acid medium with an addition of 180 kg/t,reaction temperature of 260 ℃,oxygen partial pressure of 0.3 MPa,total pressure of 5.0 MPa,retention time of 2.5 h,and slurry concentration of 40 %,which resulted in the gold extraction rate of 84.06 %.This provides a basis for gold leaching from refractory ores.