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Resource utilization of slag from desulphurization and slag skimming:A comprehensive recycling process of all components

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International Journal of Mining Science and Technology 2022年第3期32卷 585-593页

作者： Xiao Liu Peng Gao yuexin han School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China School of Chemical&Environmental Engineering Shandong University of Science&TechnologyQingdao 266590China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources Shenyang 110819China

In order to make the slag from desulphurization and slag skimming(SDSS)to be comprehensively recycled and utilized,a combined process of beneficiation and building materials preparation was proposed to recover iron from SDSS,meanwhile to apply the remaining slag tailings as cement *** this process,three iron-rich products were recovered in stages by clean gravity-magnetic separation,slag tailings were *** powder was prepared by ultrafine grinding of slag *** stability,setting time and cement mortar strength of the slag tailings cements(STC)which were mixed with Portland cement and slag powder were studied *** results showed that a proper overall performance still could be obtained at the slag powder content of 30%.Chemical composition analysis,X-ray diffraction(XRD)analysis,metallographic microscope and scanning electron microscope(SEM)analysis were employed to assess the characteristics of the SDSS and the products obtained from the whole *** results indicated that the three iron-rich products could be used as a raw material for steelmaking and ironmaking and the relatively large amount of calcium silicate(C_(2)S)and tricalcium silicate(C_(3)S)in the slag tailings make the addition of slag powder into the Portland cement feasible.

关键词： Desulphurization and slag skimming Beneficiation Iron-rich products Cement admixture Cementing property

Process mineralogy approach to optimize curing-leaching in vanadiumbearing stone coal processing plants

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International Journal of Mining Science and Technology 2023年第1期33卷 123-131页

作者： Hui Li yuexin han Jianping Jin Peng Gao Zhenya Zhou School of Resource and Civil Engineering Northeastern UniversityShenyang 110819China National-Local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources Shenyang 110819China

The purpose of this study is to apply process mineralogy as a practical tool to further understand and analyze the reasons for low leaching rates in the curing-leaching process of vanadium-bearing stone coal and to find a solution or improvement to optimize the leaching *** vanadium-bearing stone coal with the V2O5 mass fraction of 0.88%as the research object,the effects of particle size,mineral composition,and sulfuric acid curing on the feed,intermediate,and final products of curing-leaching were *** main vanadium-bearing minerals in the feed samples included sericite/illite,montmorillonite,kaolinite,limonite,and *** the penetration depth analysis of sulfuric acid,the reason for the high vanadium content in the coarse leaching residue(0.205%V2O5)was found,mainly due to the poor curing effect and incomplete washing after ***,thorough washing after sieving and further optimizing the curing process are *** vanadium content of the fine leaching residue(0.078%)was low and the curing-leaching effect was ***,the vanadium content in the thickened residue(0.296%)exceeded that in the fine leaching residue,which was attributed to the neutralization reaction in the#1 *** solve this problem,the neutralization and thickening processes should be performed in separate *** analysis and detection of key products is helpful for identifying problems and improving the curing-leaching circuit process.

关键词： Process mineralogy Vanadium Stone coal Curing-leaching Penetration

海南石碌铁矿石氢基矿相转化——磁选试验研究

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金属矿山 2024年第2期 152-156页

作者：郭风芳韩跃新张琦高鹏何佳昊海南矿业股份有限公司海南昌江572799 东北大学资源与土木工程学院辽宁沈阳110819 难采选铁矿资源高效开发利用技术国家地方联合工程研究中心辽宁沈阳110819 辽宁东大矿冶工程技术有限公司辽宁朝阳122000

海南石碌铁矿石铁品位为52.45%,铁主要以赤(褐)铁矿形式存在,分布率达86.18%,少量以磁铁矿形式存在。为高效回收利用该矿石,采用氢基矿相转化(HMPT)—磁选工艺流程开展了系统的试验研究,并对适宜条件下的产品进行了化学成分、XRD和VSM... 详细信息

海南石碌铁矿石铁品位为52.45%,铁主要以赤(褐)铁矿形式存在,分布率达86.18%,少量以磁铁矿形式存在。为高效回收利用该矿石,采用氢基矿相转化(HMPT)—磁选工艺流程开展了系统的试验研究,并对适宜条件下的产品进行了化学成分、XRD和VSM分析。结果表明:试样在给矿粒度-0.074mm占89.41%、HMPT温度525℃、HMPT时间10min、总气体流量500m L/min、H_(2)浓度20%、HMPT产品磨矿细度-0.045mm占69.68%的适宜条件下,经磁选获得铁品位65.26%、铁回收率95.39%的铁精矿。试验所获铁精矿较原重磁联合工艺铁精矿品位提高了2.7个百分点,铁回收率增加了30个百分点。研究不仅为海南石碌铁矿氢基矿相转化—高效分选工业应用提供技术支撑,还为其他复杂难选铁矿资源的绿色高效分选提供了参考依据。

关键词：铁矿石氢基矿相转化磁选 H_(2)与CO摩尔比

Reaction behavior and non-isothermal kinetics of suspension magnetization roasting of limonite and siderite

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International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 824-833页

作者： Qiang Zhang Yongsheng Sun yuexin han Yanjun Li Peng Gao School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-efficient exploitation technology for Refractory Iron Ore Resources Shenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

In order to develop limonite and decrease CO_(2) emissions,siderite is proposed as a clean reductant for suspension magnetization roasting(SMR) of *** iron concentrate(iron grade:65.92wt%,iron recovery:98.54wt%) was obtained by magnetic separation under the optimum SMR conditions:siderite dosage 40wt%,roasting temperature 700℃,roasting time 10 *** to the magnetic analysis,SMR achieved the conversion of weak magnetic minerals to strong magnetic minerals,thus enabling the recovery of iron via magnetic *** on the phase transformation analysis,during the SMR process,limonite was first dehydrated and converted to hematite,and then siderite decomposed to generate magnetite and CO,where CO reduced the freshly formed hematite to *** microstructure evolution analysis indicated that the magnetite particles were loose and porous with a destroyed structure,making them easier to be *** non-isothermal kinetic results show that the main reaction between limonite and siderite conformed to the two-dimension diffusion mechanism,suggesting that the diffusion of CO controlled the *** results encourage the application of siderite as a reductant in SMR.

关键词： reaction behavior non-isothermal kinetics suspension magnetization roasting siderite limonite CO_(2)emissions

Review on coal-based reduction and magnetic separation for refractory iron-bearing resources

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International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2087-2105页

作者： Qiang Zhang Yongsheng Sun yuexin han Yanjun Li Peng Gao School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-efficient exploitation technology for Refractory Iron Ore Resources Shenyang 110819China

The application of coal-based reduction in the efficient recovery of iron from refractory iron-bearing resources is comprehensively ***,the development and beneficiation of refractory iron-bearing resources have attracted increasing ***,the effect of iron recovery by traditional beneficiation methods is ***-based reduction followed by magnetic separation is proposed,which adopts coal as the reductant to reduce iron oxides to metallic iron below the melting *** metallic iron particles aggregate and grow,and the particle size continuously increases to be suitable for magnetic *** optimization and application of coal-based reduction have been abundantly researched.A detailed literature study on coal-based reduction is performed from the perspectives of thermodynamics,reduction kinetics,growth of metallic iron particles,additives,and *** coal-based reduction industrial equipment can be developed based on the existing pyrometallurgical equipments,rotary hearth furnace and rotary kiln,which are introduced ***,coal-based reduction currently mainly adopts coal as a reductant and fuel,which may result in high levels of carbon dioxide emissions,energy consumption,and *** innovation aiming at decreasing carbon dioxide emissions is a new trend of green and sustainable development of the steel ***,the substitution of coal with clean energy(hydrogen,biomass,etc.)for iron oxide reduction shows promise in the future.

关键词： refractory iron-bearing resources coal-based reduction iron recovery equipment carbon dioxide emissions

Effect of bastnaesite as reductant on hematite reduction during in-situ suspension magnetization roasting of refractory iron ore under neutral atmosphere

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International Journal of Mining Science and Technology 2022年第4期32卷 877-886页

作者： Wenbo Li Jijia Chen Wentao Zhou yuexin han Yan Shan School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China National-Local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources Shenyang 110819China

The iron tailings of Bayan Obo mines are solid waste,which occupies land area and also causes environmental pollution;however,this waste can be *** this study,based on the characteristics of iron minerals and fluorocarbonate contained in Bayan Obo iron tailings,clean magnetization roasting of iron minerals by bastnaesite from iron tailings during in-situ suspension magnetization roasting in a neutral atmosphere was *** results show that for iron tailings with a mass of 12 g,a N_(2) gas flow rate of 600 mL/min,and roasting for 5 min at 800℃,iron concentrate with a 60.44%iron grade at an iron recovery of 76.04%could be obtained.X-ray diffraction analysis showed that the weak magnetic hematite was reduced to strong magnetic magnetite in the neutral atmosphere,without additional *** kinetics of the magnetization roasting of mineral mixtures(bastnaesite and hematite)in a neutral atmosphere showed that the optimal reaction mechanism function was the three-dimensional diffusion model with activation energy of 161.8838 kJ·mol^(-1);this indicates that the reaction was a heterogeneous,diffusion-controlled solid-state reaction.

关键词： Bayan Obo iron tailings In-situ suspension roasting Clean recovery Phase magnetic transformation Kinetics mechanism

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中国铁矿石选矿技术发展与展望

金属矿山 2024年第2期 1-24页

作者：韩跃新张小龙高鹏李艳军孙永升东北大学资源与土木工程学院辽宁沈阳110819 难采选铁矿资源高效开发利用技术国家地方联合工程研究中心辽宁沈阳110819

铁矿石作为钢铁工业最为重要的原材料,是我国重要的战略性矿产资源之一。我国铁矿资源储量丰富,但97%以上属于贫矿,需要经过选矿富集后才能供给高炉炼铁。多年来,在我国选矿工作者的共同努力下,我国铁矿选矿技术得到长足进步和发展。通... 详细信息

铁矿石作为钢铁工业最为重要的原材料,是我国重要的战略性矿产资源之一。我国铁矿资源储量丰富,但97%以上属于贫矿,需要经过选矿富集后才能供给高炉炼铁。多年来,在我国选矿工作者的共同努力下,我国铁矿选矿技术得到长足进步和发展。通过回顾我国铁矿选矿技术的发展历程,综述单一弱磁选、单一浮选、重选—磁选—反浮选、磁化焙烧—磁选等主要选矿技术在我国铁矿选矿厂的应用,总结我国典型多金属共生型铁矿石如伴生稀土/萤石型铁矿石、伴生钛铁矿型铁矿石、伴生多金属硫化物型铁矿石和伴生硼铁矿型铁矿石的选矿现状,介绍影响我国铁矿选矿技术进步的关键设备如圆锥破碎机、高压辊磨机、半自磨机、立环脉动高梯度磁选机、高频振动细筛、搅拌磨机等,指出我国铁矿选矿未来要以“高效节能、低碳减排”为原则,以“优质优用、劣质能用”为战略,开发选冶联合工艺,研发大型高效设备,研制低温环保药剂,提高智能控制水平,加强资源综合利用。

关键词：铁矿石选矿技术高效利用低碳环保智能控制

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早孕先兆流产患者血FVⅢ活性、PAI-1水平及其对保胎结局的影响

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中国计划生育学杂志 2024年第4期32卷 844-847页

作者：高承香韩月欣张凌云青岛市胶州中心医院 266300

目的:探究凝血因子Ⅲ(FVⅢ)活性、纤溶酶原激活物抑制剂-1(PAI-1)对早孕先兆流产保胎结局的预测价值。方法:回顾性分析本院于2020年1月-2022年12月收治的345例早孕先兆流产患者临床资料,根据保胎结局分为保胎失败组124例、成功组221例,... 详细信息

目的:探究凝血因子Ⅲ(FVⅢ)活性、纤溶酶原激活物抑制剂-1(PAI-1)对早孕先兆流产保胎结局的预测价值。方法:回顾性分析本院于2020年1月-2022年12月收治的345例早孕先兆流产患者临床资料,根据保胎结局分为保胎失败组124例、成功组221例,检测两组血FVⅢ活性、PAI-1水平,超声检测子宫内膜厚度(EST),血清β-人绒毛膜促性腺激素(β-hCG)、雌二醇(E_(2))、孕酮(P),采用多因素logistic回归分析早孕先兆流产保胎成功影响因素。结果:失败组FVⅢ活性(168.31±25.84)%、PAI-1(54.39±6.05μg/l)均高于成功组(138.64±24.61)%、(49.31±5.87μg/l),EST(10.06±3.26 mm)、β-hCG(1763.86±706.77 U/L)、E_(2)(1051.16±369.57 poml/L)、P(32.96±15.72 noml/L)水平均低于成功组(12.55±1.91 mm、3299.46±1831.59 U/L、3571.36±1126.29 poml/L、64.38±17.24 noml/L)(均P<0.05)。多因素logistic回归分析显示,FVⅢ活性升高,β-hCG、E_(2)、P水平降低为影响早孕先兆流产保胎成功的危险因素(P<0.05),而PAI-1为保胎成功非危险因素。结论:FVⅢ活性升高影响保胎成功,临床可予以参考,减少盲目保胎带来的风险。

关键词：早孕先兆流产保胎凝血因子Ⅲ 纤溶酶原激活物抑制剂-1 影响因素

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硫酸亚铁废液的综合回收利用

有色金属（选矿部分） 2024年第5期 162-171页

作者：邵红雷董再蒸韩跃新张小龙东北大学资源与土木工程学院沈阳110819 难采选铁矿资源高效开发利用技术国家地方联合工程研究中心沈阳110819

在工业生产中每年都会产生大量的硫酸亚铁废液,其中钢铁深加工过程的产出量最大。硫酸亚铁废液中含有硫酸,pH值较低,且含有铁、钴、镍、铝、铬等金属离子,直接排放不仅浪费其中的金属资源,还会对土壤和水体造成严重污染。综合回收硫酸... 详细信息

在工业生产中每年都会产生大量的硫酸亚铁废液,其中钢铁深加工过程的产出量最大。硫酸亚铁废液中含有硫酸,pH值较低,且含有铁、钴、镍、铝、铬等金属离子,直接排放不仅浪费其中的金属资源,还会对土壤和水体造成严重污染。综合回收硫酸亚铁废液对企业具有巨大的经济效益,对社会具有一定的环境效益。目前主要的处理方法有中和处理法、化学沉淀法、结晶析出法、溶剂萃取法、微生物法等。针对不同生产过程产生的硫酸亚铁废液应采用相应的处理办法。由于中和处理法产生大量金属污泥、结晶析出法的产品市场需求低、溶剂萃取法处理能力低、微生物法处理周期长,化学沉淀法是目前主要采用的回收方法。化学沉淀法操作简单、无需高性能设备,但试验影响因素多,产品性质波动大。硫酸亚铁废液回收产品主要被应用于颜料行业、水处理行业、磁性材料行业等。多数产品仅利用了废液的铁元素,而硫酸和硫元素并未得到回收利用,如何对废液进行综合回收是一个研究重点。由于硫酸亚铁废液中杂质元素含量较多,对其进行提纯具有很大的难度,所需生产成本也较高,因此如何直接利用废液也是未来研究的主要方向。

关键词：硫酸亚铁中和沉淀法化学沉淀法氧化铁颜料综合利用

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