The mineralogical characterization of antimony-bearing refractory gold concentrates and the antimony extraction by ozonein HCl solution were investigated.The mineralogical study shows that there exist stibnite(Sb2S3),...The mineralogical characterization of antimony-bearing refractory gold concentrates and the antimony extraction by ozonein HCl solution were investigated.The mineralogical study shows that there exist stibnite(Sb2S3),arsenopyrite(FeAsS),pyrite(FeS2)and quartz in the concentrates,and the gold is mainly(67.42%)encapsulated in sulfides.The antimony extraction by ozone inhydrochloric acid was employed and the influences of temperature,liquid/solid ratio,HCl concentration and stirring speed on theextraction of antimony were investigated.High antimony extraction(93.75%)is achieved under the optimized conditions.After thepretreatment by ozone,the antimony is recovered efficiently and the gold is enriched in the leaching residue.展开更多
The mercury-antimony-gold ore was subjected of the flotation. As a result of enrichment of ore, the mercury-antimony concentrate with the contents of 51.5% Sb, 3.55% Hg and 6 g/t Au was received. Vacuum distillation o...The mercury-antimony-gold ore was subjected of the flotation. As a result of enrichment of ore, the mercury-antimony concentrate with the contents of 51.5% Sb, 3.55% Hg and 6 g/t Au was received. Vacuum distillation of concentrate allocation in serial sublimates mercury and antimony was designed. The big amount gold passed to calcine after vacuum distillation. The gold in calcine roastin uo to 900 ℃was 30.6 e/t.展开更多
以锑金精矿与铅精矿为研究对象,采用热力学软件FactSage计算协同熔炼过程各金属硫化物反应趋势、Me-S-O系优势区图及物相平衡分配规律。热力学分析表明,控制适宜的氧分压和硫分压可实现协同熔炼过程处在Pb(l)+Sb(l)热力学稳定区域,协同...以锑金精矿与铅精矿为研究对象,采用热力学软件FactSage计算协同熔炼过程各金属硫化物反应趋势、Me-S-O系优势区图及物相平衡分配规律。热力学分析表明,控制适宜的氧分压和硫分压可实现协同熔炼过程处在Pb(l)+Sb(l)热力学稳定区域,协同熔炼过程Sb_(2)O_(5)与PbS发生交互反应生成金属Pb、Sb的趋势较大,有利于实现熔炼过程Sb的回收和Au的捕集。验证试验表明,在熔炼温度1200℃、CaO SiO_(2)=0.40、Fe SiO_(2)=1.05、富氧浓度90%的条件下,锑金精矿与铅精矿协同熔炼过程可顺利进行,合金中Pb、Sb收率均大于88%,渣中Pb、Sb含量均小于1%,合金中Au含量达78 g t。展开更多
基金Project(51474257) supported by the National Natural Science Foundation of ChinaProject(2015zzts037) supported by the Postgraduate Research and Innovation Projects of Hunan province,ChinaProject(2015JC3005) supported by the Key Technology Research and Development Program of Hunan Province,China
文摘The mineralogical characterization of antimony-bearing refractory gold concentrates and the antimony extraction by ozonein HCl solution were investigated.The mineralogical study shows that there exist stibnite(Sb2S3),arsenopyrite(FeAsS),pyrite(FeS2)and quartz in the concentrates,and the gold is mainly(67.42%)encapsulated in sulfides.The antimony extraction by ozone inhydrochloric acid was employed and the influences of temperature,liquid/solid ratio,HCl concentration and stirring speed on theextraction of antimony were investigated.High antimony extraction(93.75%)is achieved under the optimized conditions.After thepretreatment by ozone,the antimony is recovered efficiently and the gold is enriched in the leaching residue.
文摘The mercury-antimony-gold ore was subjected of the flotation. As a result of enrichment of ore, the mercury-antimony concentrate with the contents of 51.5% Sb, 3.55% Hg and 6 g/t Au was received. Vacuum distillation of concentrate allocation in serial sublimates mercury and antimony was designed. The big amount gold passed to calcine after vacuum distillation. The gold in calcine roastin uo to 900 ℃was 30.6 e/t.
文摘以锑金精矿与铅精矿为研究对象,采用热力学软件FactSage计算协同熔炼过程各金属硫化物反应趋势、Me-S-O系优势区图及物相平衡分配规律。热力学分析表明,控制适宜的氧分压和硫分压可实现协同熔炼过程处在Pb(l)+Sb(l)热力学稳定区域,协同熔炼过程Sb_(2)O_(5)与PbS发生交互反应生成金属Pb、Sb的趋势较大,有利于实现熔炼过程Sb的回收和Au的捕集。验证试验表明,在熔炼温度1200℃、CaO SiO_(2)=0.40、Fe SiO_(2)=1.05、富氧浓度90%的条件下,锑金精矿与铅精矿协同熔炼过程可顺利进行,合金中Pb、Sb收率均大于88%,渣中Pb、Sb含量均小于1%,合金中Au含量达78 g t。