氧化锗硫化挥发富集热力学分析与试验验证  

Thermodynamic Analysis and Experimental Verification of Volatilization Enrichment of Germanium Oxide

作　　者：郭誉 GUO Yu(Hunan Research Institute for Nonferrous Metals Co.,Ltd,Changsha 410100,China)

机构地区：[1]湖南有色金属研究院有限责任公司,湖南长沙410100

出　　处：《湖南有色金属》2024年第4期61-65,96,共6页Hunan Nonferrous Metals

摘　　要：目前金属锗主要从含锗铅锌烟灰中提取,由于含量低导致生产存在流程长、试剂消耗大、三废产量大等问题。文章提出了硫化挥发富集新思路,对锗硫化挥发过程进行了热力学计算模拟,并开展了验证试验。热力学计算表明,GeO_(2)可直接生成GeS,温度升高有利于GeS生成;在GeO_(2)-FeS_(2)-C体系中,随温度升高,GeO_(2)会优先硫化成GeS_(2),随温度升高,GeS_(2)会进一步分解生成GeS,硫化剂的增加有利于GeS生成。最后,以纯GeS_(2)、FeS_(2)和C粉为原料在900℃的惰性气氛中进行硫化挥发试验,获得硫化锗挥发物,锗的硫化挥发率达93.47%,证实了锗硫化挥发富集的可行性。Metal germanium is mainly extracted from germanium-containing lead and zinc ash.Due to the low content,the production process is long,reagent consumption is large,and the output of the wastes is large.In this paper,a new idea of sulfuration volatilization enrichment is put forward,and the thermodynamic simulation of the volatilization process of germanium and the verification experiment are carried out.The thermodynamic calculation shows that GeO_(2) can directly generate GeS,and the increase of temperature is conducive to the generation of GeS.In the GeO_(2)-FeS_(2)-C system,with the increase of temperature,GeO_(2) will preferentially vulcanize into GeS_(2),and with the increase of temperature,GeS_(2) will further decompose into GeS,and the increase of sulfurizing agent is conducive to the formation of GeS.Finally,pure GeS_(2),FeS_(2) and C powder were used as raw materials for sulfurizing roasting of Ge in the inert atmosphere of 900℃,and the volatilization rate of germanium reached 93.47%,which confirmed the feasibility of volatilization enrichment of germanium.

关 键 词：硫化焙烧 挥发 热力学 平衡模拟 

分 类 号：TF843.5[冶金工程—有色金属冶金]