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Tungsten and arsenic substance flow analysis of a hydrometallurgical process for tungsten extracting from wolframite

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Tungsten 2021年第3期3卷 348-360页

作者： Yuan-Lin Chen Xue-Yi Guo qin-meng wang qing-Hua Tian Shao-Bo Huang Jin-Xiang Zhang School of Metallurgy and Environment Central South UniversityChangsha 410083China Changsha Research Institute of Mining and Metallurgy Co.LTD Changsha 410012China Ganzhou Nonferrous Metallurgy Research Institute Ganzhou 341000China

In this study,the metabolism of a hydrometallurgical process for tungsten extracting from wolframite was studied through substance flow *** mass balance accounts,substance flow charts of tungsten and arsenic were established to evaluate the metabolism efficiency of the investigated *** results showed that,the total tungsten resource efficiency of the system was 97.56%,and the tungsten recovery of unit process autoclaved alkali leaching,ion exchange,Mo removing,concentration and crystallization was 98.16%,98.94%,99.71%,99.89%,***,for extracting 1 ton of tungsten into the qualified ammonium paratungstate,10.0414 kg of arsenic was carried into the system,with the generation of 7.2801 kg of arsenic in alkali leaching residue,1.5067 kg of tungsten in arsenic waste residue,and 1.2312 kg of tungsten in Mo ***,7.9 g of arsenic was discharged into nature environment with waste water,15.5 g of arsenic was entrained into the final *** distribution and transformation behaviors of arsenic during production were analyzed through phases change analysis,and some recommendations for improving the resource efficiency of tungsten and pollution control during production were also proposed based on the substance flow analysis in this study.

关键词： Tungsten Arsenic Substance flow analysis Resource efficiency Pollution control

Copper smelting mechanism in oxygen bottom-blown furnace

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Transactions of Nonferrous Metals Society of China 2017年第4期27卷 946-953页

作者： qin-meng wang Xue-yi GUO qing-hua TIAN School of Metallurgy and Environment Central South University Changsha 410083 China

The SKS furnace is a horizontal cylindrical reactor similar to a Noranda furnace,however,the oxygen enriched air isblown into the furnace from the *** model of the SKS process was developed by analyzing the smeltingcharacteristics *** our model,the furnace section from top to bottom is divided into seven functional layers,i.e.,gas layer,mineral decomposition transitioning layer,slag layer,slag formation transitioning layer,matte formation transitioning layer,weakoxidizing layer and strong oxidizing *** furnace along the length direction is divided into three functional regions,that is,reaction region,separation transitioning region and liquid phase separation and settling *** layers or regions play differentroles in the model in describing the mechanism of the smelting *** SKS smelting is at a multiphase non-steady equilibriumstate,and the oxygen and sulfur potentials change gradually in the length and cross *** smelting capacity of the SKSprocess could be raised through reasonably controlling the potential values in different layers and regions.

关键词： oxygen bottom-blown copper smelting mechanism multiphase equilibrium oxygen potential sulfur potential SKS process

Thermodynamic analysis and process optimization of zinc and lead recovery from copper smelting slag with chlorination roasting

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Transactions of Nonferrous Metals Society of China 2021年第12期31卷 3905-3917页

作者： Bei-kai ZHANG Xue-yi GUO qin-meng wang qing-hua TIAN School of Metallurgy and Environment Central South UniversityChangsha 410083China National&Regional Joint Engineering Research Center of Nonferrous Metal Resources Recycling Changsha 410083China Hunan Key Laboratory of Nonferrous Metal Resources Recycling Changsha 410083China

An efficient chlorination roasting process for recovering zinc(Zn)and lead(Pb)from copper smelting slag was *** models were established,illustrating that Zn and Pb in copper smelting slag can be efficiently recycled during the chlorination roasting *** decreasing the partial pressure of the gaseous products,chlorination was *** Box−Behnken design was applied to assessing the interactive effects of the process variables and optimizing the chlorination roasting ***_(2) dosage and roasting temperature and time were used as variables,and metal recovery efficiencies were used as *** the roasting temperature was 1172℃ with a CaCl_(2) addition amount of 30 wt.%and a roasting time of 100 min,the predicted optimal recovery efficiencies of Zn and Pb were 87.85%and 99.26%,respectively,and the results were validated by experiments under the same *** residual Zn-and Pb-containing phases in the roasting slags were ZnFe_(2)O_(4),Zn_(2)SiO_(4),and PbS.

关键词： chlorination roasting copper smelting slags thermodynamic models optimization Zn and Pb recovery Box−Behnken design

Copper and arsenic substance flow analysis of pyrometallurgical process for copper production

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Transactions of Nonferrous Metals Society of China 2022年第1期32卷 364-376页

作者： Xue-yi GUO Yuan-lin CHEN qin-meng wang Song-song wang qing-hua TIAN School of Metallurgy and Environment Central South UniversityChangsha 410083China

The metabolism of copper and arsenic in a copper pyrometallurgy process was studied through substance flow analysis *** mass balance accounts and substance flow charts of copper and arsenic were established,indicators including direct recovery,waste recycle ratio,and resource efficiency were used to evaluate the metabolism efficiency of the *** results showed that,the resource efficiency of copper was 97.58%,the direct recovery of copper in smelting,converting,and refining processes was 91.96%,97.13%and 99.47%,***,for producing 1 t of copper,10 kg of arsenic was carried into the system,with the generation of 1.07 kg of arsenic in flotation tailing,8.50 kg of arsenic in arsenic waste residue,and 0.05 kg of arsenic in waste *** distribution and transformation behaviors of arsenic in the smelting,converting,and refining processes were also analyzed,and some recommendations for improving copper resource efficiency and pollution control were proposed based on substance flow analysis.

关键词： copper smelting substance flow analysis copper arsenic distribution behavior

Multiphase equilibrium modeling of oxygen bottom-blown copper smelting process

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Transactions of Nonferrous Metals Society of China 2017年第11期27卷 2503-2511页

作者： qin-meng wang Xue-yi GUO Song-song wang Li-le LIAO qing-hua TIAN School of Minerals Processing and Bioengineering Central South University Changsha 410083 China School of Metallurgy and Environment Central South University Changsha 410083 China

A computational thermodynamics model for the oxygen bottom-blown copper smelting process(Shuikoushan,SKS process)was established,based on the SKS smelting characteristics and theory of Gibbs free energy *** calculated results of the model show that,under the given stable production condition,the contents of Cu,Fe and S in matte are71.08%,7.15%and17.51%,and the contents of Fe,SiO2and Cu in slag are42.17%,25.05%and3.16%.The calculated fractional distributions of minor elements among gas,slag and matte phases are As82.69%,11.22%,6.09%,Sb16.57%,70.63%,12.80%,Bi68.93%,11.30%,19.77%,Pb19.70%,24.75%,55.55%and Zn17.94%,64.28%,17.79%,*** calculated results of the multiphase equilibrium model agree well with the actual industrial production data,indicating that the credibility of the model is ***,the model could be used to monitor and optimize the industrial operations of SKS process.

关键词： multiphase equilibrium modeling oxygen bottom-blown copper smelting SKS process element distribution

Thermodynamic modeling of antimony removal from complex resources in copper smelting process

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Transactions of Nonferrous Metals Society of China 2022年第12期32卷 4113-4128页

作者： Song-song wang qin-meng wang Xue-yi GUO qing-hua TIAN Sheng-li QU Zhi wang Ming-xing HUANG School of Metallurgy and Environment Central South UniversityChangsha 410083China National&Regional Joint Engineering Research Center of Nonferrous Metal Resources Recycling Changsha 410083China Shandong Humon Smelting Co. Ltd.Yantai 264109China Dongying Fangyuan Nonferrous Metals Co. Ltd.Dongying 257091China

This work investigated the reaction mechanism of Sb in copper smelting process. The difference of multi-phase distribution of Sb in four typical copper smelting processes was analyzed. A multi-phase equilibrium model of the oxygen-enriched bottom-blow copper smelting process was developed. The impacts of Cu, S, and Sb concentrations in raw materials on Sb distribution in multiphases were researched. This model was also used to investigate the effect of process factors such as copper matte grade, oxygen-enriched concentration, smelting temperature, and oxygen/ore ratio(ratio of oxygen flow rate under standard conditions to concentrate charge rate) on Sb distribution behavior. The results showed that calculation data were in good agreement with the actual production results and literature data. Increasing the Cu content and decreasing the S and Sb contents in the concentrate, increasing the copper matte grade, oxygen/enriched concentration, and oxygen-ore ratio, and at the same time appropriately reducing the smelting temperature are conducive to the targeted enrichment of Sb into the slag. Modeling results can provide theoretical guidance for the clean and efficient treatment of complex resources and the comprehensive recycling of associated elements.

关键词： copper oxygen-enriched smelting Sb reaction mechanism distribution behavior

Physicochemical and environmental characteristics of alkali leaching residue of wolframite and process for valuable metals recovery

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Transactions of Nonferrous Metals Society of China 2022年第5期32卷 1638-1649页

作者： Yuan-lin CHEN Xue-yi GUO qin-meng wang qing-hua TIAN Jin-xiang ZHANG Shao-bo HUANG School of Metallurgy and Environment Central South UniversityChangsha 410083China Ganzhou Nonferrous Metallurgy Research Institute Ganzhou 341000China Changsha Research Institute of Mining and Metallurgy Co. LTDChangsha 410012China

Physicochemical and mineralogical characteristics of an alkali leaching residue of wolframite were studied by XRD,SEM−EDS,chemical phase analysis,mineral liberation analyzer(MLA),and TG−DSC *** leaching tests,toxicity characteristic leaching procedure(TCLP)tests and Chinese standard leaching tests(CSLT)were conducted to determine the environmental mobility of toxic *** results show that,due to the high contents of W,Fe,Mn,Sn,and Nb,the residue is with high resource value,but the content of a toxic element,As,is also *** existing minerals of the investigated elements mainly occur as monomer particles,but it is difficult to extract these valuable metals by conventional acid leaching due to their mineral *** release of As increases over time in acidic *** leaching concentration of all investigated harmful elements through TCLP is within the limiting value,while the leaching concentration of As through CSLT exceeds the limiting value by more than 4 times,so the residue is classified as hazardous solid waste based on the Chinese standard.A process for valuable metals recovery from this residue was *** experimental results indicated that the main valuable metals could be extracted effectively.

关键词： alkali leaching residue physicochemical characteristics environmental characteristics valuable metals recovery

铜复杂资源造锍熔炼过程中MgO对铜锍和二氧化硅饱和铁硅渣相平衡的影响

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Transactions of Nonferrous Metals Society of China 2023年第11期33卷 3544-3559页

作者：田苗王琼琼王亲猛李伟郭学益中南大学冶金与环境学院长沙410083 有色金属资源循环利用国家地方联合工程研究中心长沙410083 大冶有色金属有限责任公司黄石435000

采用高温平衡实验及电子探针微区分析方法研究铜复杂资源中MgO对造锍熔炼平衡体系铜锍及熔炼渣成分(FeO_(x)-SiO_(2)-MgO)的影响。结果表明,在1300℃、p(SO_(2))=10kPa熔炼条件下,增加熔炼渣中MgO含量可降低渣中FeO的活度,进而降低渣中... 详细信息

采用高温平衡实验及电子探针微区分析方法研究铜复杂资源中MgO对造锍熔炼平衡体系铜锍及熔炼渣成分(FeO_(x)-SiO_(2)-MgO)的影响。结果表明,在1300℃、p(SO_(2))=10kPa熔炼条件下,增加熔炼渣中MgO含量可降低渣中FeO的活度,进而降低渣中氧分压(p(O_(2)))、减少铜在渣中化学溶解损失量;同时,渣中FeO活度降低可促进铜锍中FeS氧化进渣,提高铜锍品位。在高硅渣型中,过量MgO易在渣中形成固相夹杂颗粒(Mg_(2)SiO_(4)-Fe_(2)SiO_(4)),导致渣黏度升高、增加渣中铜损失。当熔炼温度由1200℃升至1300℃及p(O_(2))为10-6kPa时,FeO_(x)-SiO_(2)-MgO渣中MgO的最大溶解量由3%增至8%(质量分数);渣中MgO含量增加时,可通过添加SiO_(2)熔剂调整渣型、升高熔炼温度,进而降低渣中固相析出物含量,改善熔渣性质。

关键词：氧化镁铁橄榄石渣铜锍熔炼相平衡元素分布

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锑火法冶炼过程锑、砷物质流分析

Transactions of Nonferrous Metals Society of China 2023年第7期33卷 2216-2230页

作者：王科王亲猛陈远林李中臣郭学益中南大学冶金与环境学院长沙410083

应用物质流分析于锑火法冶炼系统。以锑、砷为目标元素,建立基于生产系统的物质平衡表和物质流图,构建有关系统直接回收率、废物回收率、资源效率的评价指标体系。结果表明:锑的资源效率为89.21%,挥发熔炼、还原熔炼和除杂精炼过程锑的... 详细信息

应用物质流分析于锑火法冶炼系统。以锑、砷为目标元素,建立基于生产系统的物质平衡表和物质流图,构建有关系统直接回收率、废物回收率、资源效率的评价指标体系。结果表明:锑的资源效率为89.21%,挥发熔炼、还原熔炼和除杂精炼过程锑的直收率分别为78.79%、91.00%和96.06%。同时,每产出1 t金属锑,会有11.94 kg的砷进入到冶炼系统中。砷为冶炼过程主要杂质元素。重点分析砷在主要单元过程中的分布转化行为。基于物质流分析提出提高锑资源利用效率和清洁生产的建议。

关键词：锑冶金物质流分析锑资源效率砷分布行为