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Enhancing XRF sensor-based sorting of porphyritic copper ore using particle swarm optimization-support vector machine(PSO-SVM)algorithm

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International Journal of Mining Science and Technology 2024年第4期34卷 545-556页

作者： Zhengyu Liu jue kou Zengxin Yan Peilong Wang Chang Liu Chunbao Sun Anlin Shao Bern Klein School of Civil and Resources Engineering University of Science and TechnologyBeijing 100083China Institute of Minerals Research University of Science and TechnologyBeijing 100083China State Key Laboratory of Mineral Processing Beijing 102628China Ansteel Group Mining Co.Ltd. Anshan 114000China Norman B.Keevil Institute of Mining Engineering University of British ColumbiaVancouverBC V6T 1Z4Canada

X-ray fluorescence(XRF)sensor-based ore sorting enables efficient beneficiation of heterogeneous ores,while intraparticle heterogeneity can cause significant grade detection errors,leading to misclassifications and hindering widespread technology adoption.Accurate classification models are crucial to determine if actual grade exceeds the sorting threshold using localized XRF signals.Previous studies mainly used linear regression(LR)algorithms including simple linear regression(SLR),multivariable linear regression(MLR),and multivariable linear regression with interaction(MLRI)but often fell short attaining satisfactory results.This study employed the particle swarm optimization support vector machine(PSO-SVM)algorithm for sorting porphyritic copper ore pebble.Lab-scale results showed PSO-SVM out-performed LR and raw data(RD)models and the significant interaction effects among input features was observed.Despite poor input data quality,PSO-SVM demonstrated exceptional capabilities.Lab-scale sorting achieved 93.0%accuracy,0.24%grade increase,84.94%recovery rate,57.02%discard rate,and a remarkable 39.62 yuan/t net smelter return(NSR)increase compared to no sorting.These improvements were achieved by the PSO-SVM model with optimized input combinations and highest data quality(T=10,T is XRF testing times).The unsuitability of LR methods for XRF sensor-based sorting of investigated sample is illustrated.Input element selection and mineral association analysis elucidate element importance and influence mechanisms.

关键词： XRF sensor-based sorting PSO-SVM algorithm Copper ore pebble Receiver operating curve(ROC) Net smelter return(NSR)

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Effect of Na2CO3 and CaCO3 on Coreduction Roasting of Blast Furnace Dust and High-phosphorus Oolitic Hematite

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Journal of Wuhan University of Technology(Materials Science) 2017年第3期32卷 517-524页

作者：曹允业孙体昌 kou jue XU Chengyan GAO Enxia School of Civil & Environmental Engineering Key Laboratory of High-Efficient Mining and Safety of Metal Mines Ministry of Education University of Science and Technology Beijing Beijing 100083 China

Iron was recovered from blast furnace dust and high-phosphorus oolitic hematite in the presence of Na2CO3 and CaCO3 additives. The functions of Na2CO3 and CaCO3 during the coreduction roasting process were investigated by XRD and SEM-EDS analyses. Results indicate that these additives not only hinder the reduction of fluorapatite, CaCO3 also decreases the P content of direct reduced iron（DRI） by increasing the reduction alkalinity. P remains as fluorapatite in the slag, which can be removed by grinding and magnetic separation under optimal conditions. The Na2CO3 promotes hematite reduction and improves the iron recovery（εFe） by replacing the FeO from fayalite, which results in quick growth and aggregation of metallic iron and improvement of ε（Fe） in DRI. A DRI with 91.88 mass% Fe, and 0.065 mass% P can be achieved at a recovery of 87.86 mass% under the optimal condition.

关键词： Na2CO3 CaCO3 blast furnace dust high-phosphorus oolitic hematite coreduction roasting

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Extraction of copper from copper-bearing biotite by ultrasonic-assisted leaching

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International Journal of Minerals,Metallurgy and Materials 2022年第2期29卷 212-217页

作者： Baoqiang Yu jue kou Chunbao Sun Yi Xing School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

Copper-bearing biotite is a refractory copper mineral found on the surface of the Zambian Copperbelt.Biotite is a copper oxide from which copper is extracted by various methods,especially by leaching.Leaching is the process of extracting a substance from a solid material dissolved in a liquid.To improve the efficiency of the leaching process by a more effective method,a new method called ultrasonic-assisted acid leaching is proposed and applied in this study.Compared with regular acid leaching,the ultrasound method reduced the leaching time from 120 to 40 min,and sulfuric acid concentration reduced from 0.5 to 0.3 mol·L^(-1).Besides,leaching temperature could be reduced from 75 to 45°C at the leaching rate of 78%.The mechanism analysis indicates that an ultrasonic wave can cause the delamination of a copper-bearing biotite and increase its specific surface area from 0.55 to 1.67 m^(2)·g^(-1).The results indicate that copper extraction from copper-bearing biotite by ultrasonic-assisted acid leaching is more effective than regular acid leaching.This study proposes a promising method for recycling valuable metals from phyllosilicate minerals.

关键词： ultrasonic wave copper extraction delamination copper-bearing biotite

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浅谈标准化在心理服务领域的应用

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中国标准化 2024年第11期 88-90,96页

作者：杨悦寇觉中巩泽龙梁丹西安市质量与标准化研究院陕西省心理咨询师协会(陕西大康心理学院)

心理问题在当今成为越来越重要的社会问题,但目前我国心理服务的社会现状较为混乱,缺乏规范以致监管空白,服务标准和服务组织的标准体系都存在较大的缺失。本文探讨了如何将标准化应用到心理服务各个领域,建立和完善各门类标准和标准体... 详细信息

心理问题在当今成为越来越重要的社会问题,但目前我国心理服务的社会现状较为混乱,缺乏规范以致监管空白,服务标准和服务组织的标准体系都存在较大的缺失。本文探讨了如何将标准化应用到心理服务各个领域,建立和完善各门类标准和标准体系的途径和方式。

关键词：标准化心理服务应用

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Exfoliation of poly(ethylene glycol)-intercalated graphite oxide composite in water without sonication

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International Journal of Minerals,Metallurgy and Materials 2020年第6期27卷 840-845页

作者： Yang Hu Chun-bao Sun jue kou School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China

A novel method for exfoliating graphite oxide(GrO)was implemented through the mass water absorption of a GrO–poly(ethylene glycol)(GrO–PEG)composite.The GrO–PEG composite was prepared by intercalating PEG into the lamellae of GrO,and the variation of the basal spacing was measured by X-ray diffraction analysis.The yield of graphene was measured with an ultraviolet–visible spectrophotometer,and the properties of graphene oxide(GO)were characterized by atomic force microscopy,transmission electron microscopy(TEM),Raman spectrometry,and Fourier transform infrared spectroscopy.Increasing intercalation time was found to improve the yield of GO,whereas increasing the PEG molecular weight had the opposite effect.The GO sheets produced from the intercalation–absorption–exfoliation process were found to be a four-layer structure.TEM and Raman analyses indicate that the graphitized structure and oxygen groups of GO were preserved during the exfoliation process.Most importantly,the results show that good-quality GO could be prepared via a mild method involving water absorption of a GrO–PEG composite.

关键词： graphene oxide poly(ethylene glycol) intercalation exfoliation

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增效剂对齐大山铁矿反浮选脱硅的强化作用研究

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当代化工研究 2024年第8期 65-67页

作者：胡振涛李佳佳孙长胜姜永良李阳寇珏鞍钢集团矿业有限公司齐大山分公司辽宁114043 北京科技大学土木与资源工程学院北京100083

针对齐大山混磁铁精矿反浮选脱硅过程中存在的药剂低温可溶性差、扩散性差、矿化效果不充分导致的浮选尾矿中全铁品位偏高的问题,以反浮选试验指标为依据研究了四种非离子型增效剂与捕收剂的协同增效作用。结果表明,增效剂可以显著提高... 详细信息

针对齐大山混磁铁精矿反浮选脱硅过程中存在的药剂低温可溶性差、扩散性差、矿化效果不充分导致的浮选尾矿中全铁品位偏高的问题,以反浮选试验指标为依据研究了四种非离子型增效剂与捕收剂的协同增效作用。结果表明,增效剂可以显著提高齐大山低温捕收剂对石英等脉石矿物的捕收性能。其中OP-10的增效效果最好;在捕收剂用量为540 g/t,OP-10在捕收剂中质量占比5%时,经“一粗一精三扫”反浮选闭路试验最终获得了TFe品位为68.45%、回收率为90.42%的精矿产品。与单独使用捕收剂相比,在铁精矿品位基本不变前提下,铁回收率提高了2.08个百分点,结果有力证明了增效剂对齐大山铁矿反浮选脱硅的强化作用。

关键词：齐大山铁矿反浮选脱硅脂肪酸类捕收剂浮选增效剂

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Physical chemistry mechanisms of CDR system in sulphide mineral flotation

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International Journal of Minerals,Metallurgy and Materials 2012年第3期19卷 192-198页

作者： To-hyon Pak Ti-changSun jue kou Chol-Ryong Huang School of Civil ＆ Environment Engineering University of Science and Technology Beijing Beijing 10008 China School of Mining Engineering University of Mining and Metallurgy Chongiin Chongjin Democratic People＇s Republic of Korea

The flotation tests, zeta potential measurements, and Fourier transform infrared spectroscopy （FTIR） analysis on galena, sphalerite, and pyrite were studied in a collecting-depressing-reactivating （CDR） system. In this system, sulphide minerals were first collected and acti- vated by the collector, and then depressed strongly by Ca（OH）2 in a strong alkaline solution. Finally, they were reactivated by H2SO4. The flotation tests of pure minerals showed that in the Ca（OH）2 depressing process sulphide minerals had similar flotation characteristics because they had already been influenced by the collector. Hence, the flotability differences between them were reduced. However, in the H2SO4 re- activating process considerable differences in the flotability between galena and sphalerite/pyrite were produced. That is to say, galena was relatively easy to be reactivated by H2SO4, but sphalerite and pyrite were not reactivated at pH 〉 11. The zeta potentials of sulfide minerals measured by the Zeta Plus presented irreversible characteristics on the change of pH values. The results of the FTIR spectra analysis indi- cated that the collectors already adsorbed on the mineral surface were removed partially by Ca（OH）〉

关键词： sulphide minerals flotation galena sphalerite pyrite zeta potential Fourier transform infrared spectroscopy

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A review of gold extraction using noncyanide lixiviants: Fundamentals, advancements, and challenges toward alkaline sulfur-containing leaching agents

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International Journal of Minerals,Metallurgy and Materials 2020年第4期27卷 417-431页

作者： Chun-bao Sun Xiao-liang Zhang jue kou Yi Xing School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

Alkaline sulfur-containing lixiviants,including thiosulfate,polysulfides,and alkaline sulfide solutions,stand out as a promising class of alternatives to cyanide because of their low toxicity,high efficiency,and strong adaptability.In this paper,we summarized the research progress and remaining challenges in gold extraction using these noncyanide reagents.After a brief introduction to the preparation method,the transformation process of various sulfur-containing species in alkaline solutions was discussed.Thereafter,some insights into the mechanism of gold leaching in alkaline sulfur-containing solutions were presented from different aspects,including thermodynamics analysis,electrochemical dissolution,and leaching kinetics.Moreover,recent progress in in-situ generation of sulfur-containing anions from gold-bearing sulfide minerals was outlined as well.Gold passivation caused by sulfur species was discussed in particular because it is considered the greatest challenge facing sulfur-containing leaching systems.Alkaline sulfur-containing lixiviants are expected to serve as alternatives in industrial applications of gold extraction,particularly for refractory gold ores containing copper and carbonaceous matter.

关键词： gold extraction sulfur-containing lixiviants degradation in-situ generation passivation

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Effects of Na_2SO_4 on iron and nickel reduction in a high-iron and low-nickel laterite ore

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International Journal of Minerals,Metallurgy and Materials 2018年第4期25卷 383-390页

作者： Xiao-ping Wang Ti-chang Sun Chao Chen jue kou Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal Mines University of Science and Technology Beijing

This study investigates the reactions of Na2SO4 and its effects on iron and nickel reduction in the roasting of a high-iron and low-nickel laterite ore through gas composition, X-ray diffraction, and scanning electron microscope analyses. Results showed that a reduction reaction of Na2SO4 to SO2 was performed with roasting up to 600℃. However, no clear influence on iron and nickel reductions appeared, because only a small amount of Na2SO4 reacted to produce SO2. Na2SO4 reacted completely at 1000℃, mainly producing troilite and nepheline, which remarkably improves selective reduction of nickel. Furthermore, the production of low-melting-point minerals, including troilite and nepheline, accelerated nickel reduction and delayed iron reduction, which is attributed to the concurrent production of magnesium magnetite, whose structure is more stable than the structure of magnetite. Reduction reactions of Na2SO4 resulted in weakening of the reduction atmosphere, and the main product of Na2SO4 changed and delayed the reduction of iron. Eventually, iron metallization was effectively controlled during laterite ore reduction roasting, leading to iron mainly being found in wustite and high iron-containing olivine.

关键词： laterite ore ferronickel reduction magnetic separation

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CaCO_(3)和Na_(2)CO_(3)在高磷鲕状铁矿氧化焙烧−气基还原中的作用

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中南大学学报（自然科学版） 2022年第4期53卷 1157-1166页

作者：吴世超孙体昌寇珏北京科技大学土木与资源工程学院北京100083

为区分CaCO_(3)和Na_(2)CO_(3)这2种脱磷剂在高磷鲕状铁矿氧化焙烧−气基还原过程中的不同作用,采用XRD以及SEM-EDS研究二者作用机理的差异。研究结果表明:CaCO_(3)的分解使氧化球的孔隙数增多,且CaCO_(3)不利于赤铁矿颗粒的微晶连接,从... 详细信息

为区分CaCO_(3)和Na_(2)CO_(3)这2种脱磷剂在高磷鲕状铁矿氧化焙烧−气基还原过程中的不同作用,采用XRD以及SEM-EDS研究二者作用机理的差异。研究结果表明:CaCO_(3)的分解使氧化球的孔隙数增多,且CaCO_(3)不利于赤铁矿颗粒的微晶连接,从而使氧化球抗压强度降低;而加入Na_(2)CO_(3)后生成了低熔点霞石,促进赤铁矿颗粒长大,减少氧化球中的孔隙数,导致氧化球的抗压强度增加。以CaCO_(3)为脱磷剂时,在氧化过程中生成的钙铁榴石等含铁矿物不能被还原,且赤铁矿被还原成细小的金属铁颗粒;此外,部分金属铁颗粒会包裹含磷硅酸盐,导致无法获得合格的粉状还原铁。但以Na_(2)CO_(3)为脱磷剂时,在氧化阶段得到的含铁矿物仅为赤铁矿。在还原过程中,赤铁矿被还原成粒度较大的铁颗粒,且铁颗粒与磷酸钙钠及其他脉石界限明显,可通过磨矿−磁选实现提铁降磷的目标。

关键词：高磷鲕状铁矿氧化焙烧气基还原磁选 CaCO_(3) Na_(2)CO_(3)

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