新颖两步法提高阿希高硫金精矿生物氧化效率

为提高阿希难处理金精矿的生物氧化效率,利用两步氧化法（高温化学氧化与随后的生物氧化）处理阿希金精矿,并优化了生物氧化阶段的溶液p H。结果表明,两步法生物氧化阶段最优p H范围为1.0-1.2,在此条件下,既能保持微生物的氧化活性又能减少铁钒沉淀的生成,可以有效提高氧化效率;铁、硫的氧化率分别提高了12.50%与15.49%,提金率提高了21.02%。因此,两步氧化法联合p H调控是一种高效氧化阿希金精矿的方法,在今后处理复杂难处理金精矿领域中具有广阔的应用前景。...

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Published in中国有色金属学报：英文版 Vol. 25; no. 12; pp. 4119 - 4125
Main Author 刘新星 王国华 霍强 谢建平 李寿朋 武海艳 郭玉洁
Format Journal Article
LanguageEnglish
Published 2015
Subjects
pH调控
两步氧化法
生物氧化法
金精矿
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Summary:为提高阿希难处理金精矿的生物氧化效率,利用两步氧化法（高温化学氧化与随后的生物氧化）处理阿希金精矿,并优化了生物氧化阶段的溶液p H。结果表明,两步法生物氧化阶段最优p H范围为1.0-1.2,在此条件下,既能保持微生物的氧化活性又能减少铁钒沉淀的生成,可以有效提高氧化效率;铁、硫的氧化率分别提高了12.50%与15.49%,提金率提高了21.02%。因此,两步氧化法联合p H调控是一种高效氧化阿希金精矿的方法,在今后处理复杂难处理金精矿领域中具有广阔的应用前景。
Bibliography:43-1239/TG
In order to improve the bio-oxidation efficiency of Axi refractory gold concentrate, a two-step process including a high temperature chemical oxidation and a subsequent bio-oxidation, combined with p H control during the bio-oxidation step was used. The results revealed that the optimum mode was to maintain solution p H at 1.0-1.2 during the biological oxidation stage. Under this condition, the activity of mixed culture could be sustained and the formation of jarosite could be diminished, thus the oxidation efficiency was improved. The oxidation levels of iron and sulfur were improved by 12.50% and 15.49%, and the gold recovery was increased by 21.02%. Therefore, the two-step process combined with p H control is an effective method for oxidizing the biohydrometallurgical process of Axi gold concentrate, and it will have a broad prospect of application in dealing with complex refractory gold concentrate.
gold concentrate; bio-oxidation; p H control; two-step oxidation
Xin-xing LIU,Guo-hua WANG,Qiang HUO,Jian-ping XIE,Shou-peng LI,Hai-yan WU,Yu-jie GUO （1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China, 2. Key Laboratory of Biohydrometallurgy, Ministry of Education, Central South University, Changsha 410083, China）
ISSN:1003-6326