|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | One-step electrochemical reduction of stibnite concentrate in molten borax显示文摘In this study,antimony production from a stibnite concentrate(Sb2S3)was performed in one step using a molten salt electrolysis method and borax as an electrolyte.Electrochemical reduction of the stibnite concentrate was performed at 800℃under galvanostatic conditions and explained in detail by the reactions and intermediate compounds formed in the borax.The effects of current density(100 800 mA cm^-2)and electrolysis time(10 40 min)on cathodic current efficiency and antimony yields were systematically investigated.During the highest current efficiency,which was obtained at 600 mA cm^-2,direct metal production was possible with 62%cathodic current efficiency and approximately 6 kWh/kg energy consumption.At the end of the 40-min electrolysis duration at 600 mA cm^-2 current density,antimony reduction reached 30.7 g and 99%of the antimony fed to the cell was obtained as metal. | Levent Kartal Mehmet Baris Daryal Güldem Kartal Sireli Servet Timur | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，10： | 6 |
| 2 | Antimony transformation and mobilization from stibnite by an antimonite oxidizing bacterium Bosea sp. AS-1显示文摘Soils and waters are heavily contaminated by antimony in Xikuangshan(XKS)mine area.It is widely accepted that oxidative dissolution of sulfide minerals and aqueous dissolution are the most prevalent geochemical mechanisms for the release of Sb to the environment.Bosea sp.AS-1 is an antimonite-oxidizer isolated from the mine slag in Xikuangshan Sb mine.Whole genome sequencing revealed the presence of multiple sulfur-oxidizing genes,antimony(Sb)metabolism genes and carbon fixation genes in AS-1 s genome.We therefore hypothesized that under oxic conditions,AS-1 could mediate the oxidation of sulfide and Sb(Ⅲ)in stibnite(Sb_(2)S_(3))and lead to the release of Sb.Indeed,strain AS-1 was discovered as an autotrophic Sb(Ⅲ)-oxidizer.Antimony mobilization studies conducted with strain AS-1showed significantly enhanced mobilization of Sb,and complete oxidation of released Sb and sulfur to Sb(V)and sulfate.In addition,AS-1 induced a faster release of Sb under heterotrophic condition,and new acicular minerals might form.These findings support the hypothesis that microorganisms play an important role in the mobilization and transformation of Sb in XKS mine area and may contribute to our further understanding of the Sb biogeochemical redox cycle in natural environment. | Li Xiang Chaoyang Liu Deng Liu Liyuan Ma Xuan Qiu Hongmei Wang Xiaolu Lu | 2022 | Journal of Environmental Sciences2022，34，1： | 3 |
| 3 | Gold and antimony metallogenic relations and ore-forming process of Qinglong Sb(Au) deposit in Youjiang basin, SW China: Sulfide trace elements and sulfur isotopes显示文摘In the northwestern margin of the Youjiang basin(NWYB)in SW China,many Carlin-like gold deposits are highly antimony(Sb)-rich,and many vein-type Sb deposits contain much Au.These deposits have similar ages,host rocks,ore-forming temperatures,ore-related alterations and ore mineral assemblages,but the Au and Sb metallogenic relations and their ore-forming process remain enigmatic.Here we investigate the large Qinglong Sb deposit in the NWYB,which has extensive sub-economic Au mineralization,and present a new metallogenic model based on in-situ trace elements(EPMA and LA-ICP-MS)and sulfur isotopes(NanoSIMS and fs-LA-MC-ICPMS)of the ore sulfides.At Qinglong,economic Sb ores contain coarse-grained stibnite,jasperoid quartz and fluorite,whilst the sub-economic Au–Sb ores comprise dominantly veined quartz,arsenian pyrite and fine-grained stibnite.Three generations of ore-related pyrite(Py1,Py2 and Py3)and two generations of stibnite(Stb1 and Stb2)are identified based on their texture,chemistry,and sulfur isotopes.The pre-ore Py1 is characterized by the lower ore element(Au,As,Sb,Cu and Ag)contents(mostly below the LA-ICP-MS detection limit)and Co/Ni ratios(average 0.31)than the ore-stage pyrites(Py2 and Py3),implying a sedimentary/diagenetic origin.The Py2 and Py3 have elevated ore element abundance(maximum As=6500 ppm,Au=22 ppm,Sb=6300 ppm,Cu=951 ppm,Ag=77 ppm)and Co/Ni ratios(average 1.84),and have positive As vs.Au–Sb–Cu–Ag correlations.Early-ore Stb1 has lower As(0.12–0.30 wt.%)than late-ore Stb2(0.91–1.20 wt.%).These features show that the progressive As enrichment in ore sulfides is accompanied by increasing Au,Sb,Cu and Ag with the hydrothermal evolution,thereby making As a good proxy for Au.As-rich,As-poor and As-free zones are identified via NanoSIMS mapping of the Au-bearing pyrite.The As-rich zones in the Qinglong Au-bearing pyrites(Py2 and Py3)and ore stibnites(Stb1 and Stb2)have narrowδ^(34)SH_(2)S ranges(-8.9‰to +4.1‰,average-3.1‰)and-2.9‰to +6.9‰,average + 1.3‰),respectively,indicating that the Au-rich and Sb-rich fluids may have had the same sulfur source.Published in-situ sulfur isotopic data of pyrite As-rich zones from other Carlin-like Au deposits(Shuiyindong,Taipingdong,Nayang,Getang and Lianhuashan)in the NWYB have similar ore-fluidδSH_(2)S values(-4.5‰to +6.7‰,average-0.6‰)to those of Qinglong.Therefore,we infer that the sulfur of both Au and Sb mineralization was derived from the same magmatic-related source(0±5‰)in the NWYB.Moreover,the core of pyrites(Py1)has variable S isotope fractionation(-18.9‰to +18.1‰,mostly +3‰to +12‰),suggesting that the higher-^(34)S H_(2)S was produced by bacterial sulfate reduction(BSR).The hydrothermal pyrite(Py2 and Py3)δ^(34)S values gradually decrease with increasing As concentrations,and ultimately,within the restricted range(-5‰to +5‰)in As-rich zones.This variation implies that the As-rich pyrite was formed through ongoing interactions of the magmatic-hydrothermal fluid with pre-existing sedimentary pyrites,causing the progressive decreasing δ^(34)S values with As content increase,Hence,the fluid/mineral interaction may have generated the observed variation in δ^(34)S and As contents.Overall,comparing the Au and Sb deposits in the NWYB,we favor a magmatic-related source for the Au–Sb–As-rich fluids,but the Au-and Sb-ore fluids were likely evolved at separate stages in the ore-forming system. | Jun Chen Zhi-Long Huang Rui-Dong Yang Li-Juan Du Ming-Yang Liao | 2021 | Geoscience Frontiers2021，12，2： | 3 |
| 4 | THE PULP ELECTROCHEMISTRY OF FLOTATION SEPARATION FOR STIBNITE-ARSENOPYRITE BULK CONCENTRATE显示文摘THEPULPELECTROCHEMISTRYOFFLOTATIONSEPARATIONFORSTIBNITE-ARSENOPYRITEBULKCONCENTRATEOuLemingFengQimingChenJin(DepartmentofMine... | Ou Leming Feng Qiming Chen Jin(Department of Mineral Engineering, Central South University of Technology, Changsha 410083,China) | 1998 | Journal of Central South University1998，10，1： | 1 |
| 5 | Metallogenesis of the Baidi Au-Sb deposit, southwest Guizhou Province, China: mineralogical and geochemical evidence from sulfur-bearing minerals显示文摘The Baidi Au-Sb deposit,which contains 8 t of Au and 10,979 Mt of Sb,is a typical and rare paragenetic deposit located in southwestern Guizhou Province,China.Previous studies have focused on individual ores,but have not combined them to identify their paragenetic mechanism or metallogenic regularity.Therefore,we usedfield investigations,microscopic observations,and in situ anal-yses to identify the spatial distribution,mineral paragene-sis,compositional evolution,and metallogenic material sources of the ore bodies.We also determined the Au and Sb paragenetic characteristics and the metallogenesis of the deposit.The main Au-bearing minerals in the deposit were early(Apy1–2)and late(Apy3)stage arsenopyrites,as well as pre-mineralization(Py1),mineralization(Py2–5),and late mineralization(Py6–7)stage pyrites.The main Sb-bearing minerals were stibnite(Snt),skinnerite,bournonite,and valentinite.The minerals formed in the order of Py1,Py2–3+Apy1,Py4–5+Apy2,Snt,and Py6–7+Apy3.The d34S values of the arsenopyrites and pyrites ranged from-5 to 5%,while those of stibnite were mostly less than-5%in the later mineralization stages.Sulfur was provided by deep magmatic hydrothermalfluids,but sedimentary sulfur was added in the later stages.Moreover,the trace elemental contentsfluctuated and eventually became similar to those of the sedimentary strata.By comprehensively considering the ores along with the geo-logical characteristics of the deposit,we determined that deep magma provided the Au during ore formation.Later tectonic changes provided Sb from the sedimentary strata,which precipitated along fault expansion areas and pro-duced Au and Sb paragenesis. | Jun Yan Yong Xia Qinping Tan Zhuojun Xie Guosong Ji | 2024 | Acta Geochimica2024，43，2： | 0 |
| 6 | 辉锑矿电氯化浸出与锑的同时电积显示文摘直接湿法生产锑白的研究推动了湿法炼锑工艺的发展,近年防腐蚀材料的进展使湿法冶金设备有较大突破,因而国内已报道过几种酸性湿法炼锑。本文报道在同一设备完成锑矿浸出与电积的一步炼锑法新工艺。 | 张元福 | 1993 | 有色金属1993，45，2： | 0 |
| 7 | FRACTIONATION OF SULFUR ISOTOPES IN CRYSTALS OF STIBNITE AND PYRITE显示文摘While the fractionation of sulfur isotopes is known to occur between neighboring deposits of two different minerals containing sulfur, little knowledge exists as regards such fractionation in a certain single sulfur-containing mineral. Recently | 张青莲 | 1989 | Chinese Science Bulletin1989，34，14： | 0 |
| 8 | Anodic process of stibnite in slurry electrolysis:The direct collision oxidation显示文摘Mineral oxidation leaching in the anode area is the key step in slurry electrolysis.By adopting the slow linear potential scanning method during slurry electrolysis,this study investigated the steady-state polarization curve of a pure stibnite mineral on a graphite anode.In addition,the influence of the mineral particle size,liquid–solid ratio,stirring speed,and temperature on the collision oxidation of the mineral with the anode was studied.Based on the different oxidation reactions,the potential range can be divided into three intervals:the low-potential interval with a potential lower than 0.75 V,an intermediatepotential interval with a potential within 0.75–1.2 V,and a high-potential interval with a potential higher than 1.2 V.The collision oxidation of the mineral with the anode occurred in all three intervals.The oxidation of Sb(III)also appeared in the intermediate-and high-potential intervals,and chlorine evolution occurred in the high-potential interval.Therefore,the low-potential interval was determined to be a suitable potential interval for the slurry electrolysis process.In the low-potential interval,the particle size,liquid–solid ratio,and stirring speed had little effect on the oxidation rate of the minerals.As the temperature increased,the stibnite oxidation rate and exchange current density increased.Overall,the direct collision oxidation rate of stibnite was relatively low and the current densities under all the investigated conditions were lower than 0.4 mA·cm^(-2.This indicates that it is difficult to realize industrial production while relying solely on this process. | Yonglu Zhang Dingfan Qiu Chengyan Wang Yongqiang Chen Zhichao Yao Xiaowu Jie Wei Gao Shufeng Ruan | 2022 | Chinese Journal of Chemical Engineering2022，35，1： | 0 |
| 9 | CHEMICAL PROPERTIES OF AMINO-CARBOXYLMETHYL CELLULOSE AND ITS DEPRESSING MECHANISMS ON STIBNITE显示文摘This paper presents a study on the chemical properties ofamino-carboxylmethyl cellulose(ACMC)and the mechanisms of the reac-tion of ACMC with copper ions and the depression of ACMC on CuSO4-ac-tivated stibnite.The results of XPS and IR analyses show that after CMCis treated by aqueous ammonia,amino-carboxyl groups form in CMCmolecules by H-bonding action which can complex selectively with copperions to form copper-amino-carboxymethyl cellulose.On the surface ofCuSO4-activated stibnite,ACMC is also able to complex strongly with cop-per ions and forms a strong hydrophilic depression film.Because there arethe obvious difference of reactions between ACMC with Cu2+ and ACMCwith Hg2+,the separation of cinnabar from stibnite is successfully realizedusing ACMC as depressant and CuSO4 as activator. | 徐晓军 胡熙庚 刘金华 | 1994 | Journal of Wuhan University of Technology(Materials Science)1994，9，1： | 0 |
| 10 | Reduction of Stibnite at Moderate Temperature显示文摘Reduction of stibnite with hydrogen in the presence of calcium oxide has been experimentally inves-tigated at moderate temperature. The results reveal that the effluent generated in the reduction pro-cess contains much less air-polluting substance H2S, and that the reaction activation energy is63. 3 kJ/mol. The form of antimony changes considerably when the reaction temperature varies. | Zhonghua LIU+ Chunpeng LIU, Dept. of Metallurgy, Kunming Institute of Technology, Kunming, 650093, China | 1993 | Journal of Materials Science & Technology1993，9，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员