金铜矿氯化浸出隔膜电解新工艺

采用FeCl3和CuCl2直接浸出金铜矿,铜主要以氯化亚铜形式溶解,硫变成硫磺,浸出率可达95%～99%.浸出液采用隔膜电解方法产出阴极铜.阴极电解后液返到阳极区氧化再生成FeCl3和CuCl2,可返回浸出系统循环使用,浸出渣提取金银.研究结果表明,该工艺过程简单,投资少,电耗低,可综合提取金、银、铜、硫等有价元素,有利于多金属的综合利用,劳动条件好,环境友好.     

堆浸载金炭解吸贵液用炭纤维电积法提金工业试验研究

用炭纤维电积法处理含金５５～１８０ｇ／ｍ３的堆浸场载金炭解吸贵液，经３个月的连续工艺试验表明，在电解条件与钢毛法相同时，贫液品位可降至０．５ｇ／ｍ３，金电解沉积率＞９９％，阴极电流效率达７％～１１％，反向电解可得Ａｕ＋Ａｇ≈９５％～９９％的合质金，炭纤维反复使用３个月无明显损耗，性能不变。一个炭纤维电解槽可取代２～３个同样容积的钢毛电解槽。     

XPS characteristics of sulfur of bio-oxidized arsenic-bearing gold concentrate and changes of surface nature of bio-oxidation residue

During bio-oxidation of sulfides, the chemical state change of sulfur is a complex and key factor. It is not only an indicator of the extent and intensity of the bio-oxidation, but also controls the property of bio-leaching medium and the period of oxidation. The chemical state of sulfur in sulfides oxidized by leaching bacteria was studied with XPS. Sulfide minerals in the arsenic-bearing gold concentrate consist of pyrite, arsenopyrite, chalcopyrite, galena, sphalerite and so on. In order to probe the pattern of the chemical state change of sulfur in the bio-oxidation residue of arsenic-bearing gold concentrate, the structure of the grains, and the surface nature of the residue, XPS test was carried out through different sputtering duration. The study of XPS clearly shows that: sulfides is progressively oxidized from the surface of minerals to the core by leaching bacteria; the chemical valence of sulfur changes from S^2- or [S2]^2- to [SO4]^2- ; sulfur in the core is in a reduction state, S^2- or [S2]^2- , but exists in an oxidation state S^6 on the surface; due to the chemical state change of sulfur, mineral phase of the bio-oxidation residue is also changed(sulfides inside, while sulfates outside); the layered structure is found in the grains of the bio-oxidation residue.     

提高金厂沟梁金矿炭浆厂解吸率的生产实践

通过对解吸电解操作条件的调整和控制，使解吸电解回收率由原来的75．23％提高到91．18％，贫炭含金从原来的518．3g／t降到168．8g／t，缓解了设备处理能力和生产任务之间的矛盾．     

金厂沟梁金矿氰化原矿的工艺矿物学研究

金厂沟梁金矿氰化原矿的工艺矿物学研究是在原矿金赋存状态研究基础上进行的．通过研究查清了氰化原矿的微量元素的特征、粒度的分布特征和氰化原矿的矿物成分．确定了金的赋存状态,进而对选治工艺进行了讨探,为提高金的选冶回收率提供了可靠的依据．     

Submicro-battery effect and selective bio-oxidation model of gold-bearing arsenopyrite by Thiobacillus ferrooxidans

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粗金粗银一次电解分离提纯工业试验

粗金粉（Ａｕ含量７０％￣８０％）和粗银粉（Ａｇ含量９０％以上）混合熔铸成含金较高的阳极（Ａｕ：Ａｇ≈１：３），采用一次电解工艺分离提纯，最终产品金锭成色〉９９％，银锭中银含量〉９９．９％。工艺过程简单，投资操作费用较低。     

亚硫酸盐无氰镀银工艺

研究了以亚硫酸协为主络合剂的无氰镀银工艺，研究中发现加入一种添加剂，可大大提高镀液的稳定性，并使镀层光亮细致。同时，还研究了温度、ｐＨ值，添加剂等对镀液性能及镀银层性能的影响。     

提高金银浮选回收率的试验研究

对赤峰某金矿进行提高金银浮选回收率的试验研究,通过XRD/SEMEnergy Spectrum对样品的物相组成、金银赋存状态及嵌布粒度进行检测;考察了磨矿细度、捕收剂及辅助剂用量、扫选时间及矿浆pH值对浮选效果的影响;通过精选实验、开路综合条件试验和闭路试验研究,结果表明,浮选时加入T12,抑制细泥及硫化氧化矿,产出精矿中Au品位可达60.2g/t,浮选回收率可达87.50%;精矿中Ag品位可达6 767 g/t,浮选回收率可达到75.21%,确定适宜该矿石性质的工艺条件及工艺流程,获得的金精矿可作为混合精矿外售。