Minerals Engineering最新文献

{"title":"Enhancing the flotation of columbite via the synergistic effect of mixed collectors","authors":"Yiwen Hu ,&nbsp;Jieliang Wang ,&nbsp;Qizheng Qin ,&nbsp;Zhao Cao ,&nbsp;Wenda Lu ,&nbsp;Jingyang Shi ,&nbsp;Xu Wu ,&nbsp;Peng Wang ,&nbsp;Yongsheng Sun","doi":"10.1016/j.mineng.2025.109235","DOIUrl":"10.1016/j.mineng.2025.109235","url":null,"abstract":"<div><div>Columbite, a critical mineral for niobium extraction, achieving efficient collection of columbite in the flotation process remains a significant challenge. Based on the preliminary work, it was found that octyl hydroxamic acid (OHA) and sodium dodecyl sulfonate (SDS) were used as the mixed collector system, which could reduce the cost and improve the recovery of columbite. However, the synergistic adsorption mechanism of OHA/SDS in columbite flotation requires further investigation. Micro-flotation experiments indicate that the OHA/SDS mixed collector, compared to OHA or SDS used individually, significantly improves the flotation recovery of columbite, with an optimal molar ratio of OHA:SDS = 1:4. Adsorption experiments, zeta potential measurements, contact angle assessments, solution chemistry calculations, X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared spectroscopy (FTIR) analyses demonstrate that the mixed collector exhibits stronger adsorption affinity on the columbite surface compared to single collectors, revealing a distinct synergistic adsorption effect of OHA/SDS. Atomic force microscopy (AFM) tests reveal that the columbite surface treated with the mixed collector shows more distinct spot-like and layered adsorption features, confirming the synergistic adsorption of OHA/SDS on the columbite surface. Molecular dynamics (MD) simulations suggest that OHA molecules intercalate between SDS ions adsorbed on the columbite surface, effectively reducing electrostatic repulsion among SDS ions, thereby enhancing columbite flotation.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109235"},"PeriodicalIF":4.9,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From performance to mechanism: Analysis of controlling strength attenuation of high-sulfur lead-zinc tailings cemented paste backfill","authors":"Zhenqi Wang ,&nbsp;Aixiang Wu ,&nbsp;Shaoyong Wang ,&nbsp;Yibo Zhao","doi":"10.1016/j.mineng.2025.109233","DOIUrl":"10.1016/j.mineng.2025.109233","url":null,"abstract":"<div><div>The disposal of high-sulfur tailings severely impacts the environment. Preparing them into cemented paste backfill (CPB) and backfilling them into underground goafs is an environmentally friendly technology. However, the study on high-sulfur CPB performance and control mechanism is currently unclear, resulting in application limitations. This study comprehensively studies the rheological and mechanical properties, control methods, and environmental evaluation of high-sulfur CPB. The results indicate that the higher the sulfur content, the higher the shear yield stress and viscosity, and the better the flowability. However, the initial and final setting times are prolonged, and the strength shows a trend of increasing, decreasing, and increasing with the extension of curing time, indicating that the strength attenuation is obvious. By adding different inhibitors to high-sulfur CPB, it was found that naphthalene superplasticizer (FDN) has the best inhibitory effect on strength attenuation. The oxidation of pyrite, which produces SO₄²⁻ and H⁺, is a key cause of strength attenuation. Different inhibitors boost strength mainly by curbing pyrite oxidation. They also enhance compactness by increasing the amounts of hydration products like calcium silicate hydrate (C-S-H), Ettringite (Et), and gypsum to fill pores. The strength control mechanism of the inhibitor mainly has two ways: to accelerate the formation of C-S-H and to promote the amount of Et. FDN in mitigating strength attenuation and achieving high immobilization rates for Pb²⁺ (92.2 %) and Zn²⁺ (98.9 %). This study has practical value for the environmental protection and utilization of CPB prepared from high-sulfur tailings, solving the problems of strength attenuation in high-sulfur CPB and providing new ideas for the treatment of high-sulfur tailings.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109233"},"PeriodicalIF":4.9,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating soft data into geostatistical modeling of geometallurgical variables: Implications for modeling the copper oxide ratio in copper porphyry deposits","authors":"Nasser Madani ,&nbsp;Mohammad Maleki ,&nbsp;Ayana Karakozhayeva","doi":"10.1016/j.mineng.2025.109232","DOIUrl":"10.1016/j.mineng.2025.109232","url":null,"abstract":"<div><div>Geostatistical modeling involves continuous and categorical variables that are relevant in various earth science applications. While many studies have focused on modeling continuous variables such as ore and mineral grades with geological domains, the choice of modeling technique depends on the abruptness of the variation across these domains. In cases in which continuous variables display soft fluctuations across domains, a joint simulation approach is advocated. This approach leverages the spatial and local cross-correlations of continuous variables using categorical formations. However, patchy and unstructured categorical simulation outcomes may not accurately represent long-range geological settings. In the context of geometallurgical modeling, continuous variables represent geometallurgical parameters, while categorical variables signify geometallurgical domains, such as mineralization zones. The generation of patchy and unstructured geometallurgical domains remains a challenge when soft boundaries are present. Another challenge in geometallurgical parameter modeling relates to their non-additive nature, rendering block-support simulations through traditional block-kriging or block-simulation techniques ineffective. This study introduces an enhanced geostatistical modeling and co-simulation method aimed at co-simulating copper (Cu), copper oxide (CuO), and the copper oxide ratio (COR), which is strongly correlated with mineralization zones in copper porphyry deposits. The proposed method incorporates soft information from mineralization zones in the form of interpretive geological models and a change of variable technique to address the non-additive nature of the COR, which typically hinders block-support simulations, distinguishing it from CuO and Cu, which are additive variables. The methodology aims to provide a reliable framework for the spatial modeling of geometallurgical parameters, optimizing mineral processing plants and mine planning.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109232"},"PeriodicalIF":4.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable approaches for multidimensional disposal and applications of aluminum dross: A review","authors":"Yusheng Tang ,&nbsp;Lutong Ma ,&nbsp;Zhesheng Qiu ,&nbsp;Wanzhang Yang ,&nbsp;Bensong Chen ,&nbsp;Yan Lin","doi":"10.1016/j.mineng.2025.109194","DOIUrl":"10.1016/j.mineng.2025.109194","url":null,"abstract":"<div><div>Aluminum dross (AD) represents a significant byproduct of the aluminum smelting process, characterized by its considerable content of elements such as Al, Si, N, and F, which imbue it with both substantial potential economic value and non-negligible environmental pollution risks. Consequently, the clean recovery and disposal of AD emerge as a pivotal challenge that the aluminum industry urgently needs to address. This paper delineates the origins of constituents within AD and their environmental ramifications. Furthermore, it thoroughly explores prevalent AD recuperation techniques while meticulously dissecting the detoxification mechanisms and technical nuances inherent to hydrometallurgical and pyrometallurgical approaches. Through resource recovery technology and the synergistic disposal of multiple hazardous wastes, strategies for AD disposal are systematically organized. Considering the characteristics of the aforementioned technologies, we have proposed a technique for the co-recovery of cryolite and aluminum fluoride synthesized from spent carbon anodes and AD. Finally, the challenges related to the recycling and utilization of AD were summarized and analyzed.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109194"},"PeriodicalIF":4.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discrete element analysis of the influence of grinding media shape on the grinding process","authors":"Xin Fang ,&nbsp;Caibin Wu ,&nbsp;Ningning Liao ,&nbsp;Jiuxiang Zhong ,&nbsp;Riqian Liu ,&nbsp;Ji Wu ,&nbsp;Li Ling ,&nbsp;Xuqian Duan","doi":"10.1016/j.mineng.2025.109222","DOIUrl":"10.1016/j.mineng.2025.109222","url":null,"abstract":"<div><div>The shape of the media significantly impacts the grinding process, but opacity (the black box issue) limits in-depth analysis of the mechanisms by which media shape affects grinding. This paper employs Discrete Element Method (DEM) simulations and batch grinding tests to systematically study the effects of different shaped grinding media on the grinding process. Based on changes in the motion behavior of particle assemblies, the lifting curves, dropping trajectories, and energy carrying differences of different media are analyzed. It is observed that spheres roll noticeably within the cylinder, while cylinders and hexagonal prisms, due to their increased contact surfaces, achieve higher lifting heights and speeds, and cover a broader range of motion. Additionally, spheres have higher rotational energy than cylinders and hexagonal prisms, but lower kinetic energy. Further analysis through contact models reveals differences in media and energy transfer. Although spheres make fewer contacts with the minerals, the contact energy is significant, overall greater than that of cylinders and hexagonal prisms. The latter make more frequent contact with minerals, resulting in a more uniform distribution of energy. Simulation results are validated through energy tests and analysis of grinding product particle size, and different media’s crushing energy models are constructed based on the JK model. The results indicate that as mineral particle size decreases, the advantages of steel cylpeb and hexagonal prisms gradually become apparent, and they exhibit good predictive performance.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109222"},"PeriodicalIF":4.9,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of the difference in adsorption of DL-2-amino-3-mercaptopropionic acid on the surfaces of jamesonite and pyrite on flotation separation","authors":"Hongxin Qiu ,&nbsp;Bozeng Wu ,&nbsp;Jianhua Chen ,&nbsp;Xiaohao Sun ,&nbsp;Mingzhen Hu","doi":"10.1016/j.mineng.2025.109220","DOIUrl":"10.1016/j.mineng.2025.109220","url":null,"abstract":"<div><div>Conventional flotations for separating jamesonite and pyrite employ cyanide as a pyrite flotation inhibitor, leading to significant environmental concerns. In this study, density functional theory calculations were utilized to investigate the differences in the adsorption of DL-2-amino-3-mercaptopropionic acid (DL) on jamesonite and pyrite surfaces. The potential of DL as a pyrite flotation inhibitor was assessed based on atomic coordination, spatial alignment, and orbital compatibility, which was subsequently corroborated by experimental data. Findings indicated that the Fe sites on the jamesonite surface were constrained by steric effects, rendering them challenging for inhibitor adsorption. Effective adsorption of flotation inhibitors on mineral surfaces necessitates meeting both spatial and orbital requirements. Although the Pb and Sb sites on the surface fulfilled the spatial criteria for inhibitor adsorption, strong adsorption was hindered by orbital mismatch. In contrast, pyrite satisfied the spatial criteria for inhibitor adsorption, where the t and e orbitals, derived from the Fe²⁺ d orbital, formed σ-bonding and π-backbonding with DL. This was validated by pure mineral flotation and time-of-flight secondary-ion mass spectrometry. Results of this study considerably demonstrate the potential of DL, fulfilling both spatial and orbital requirements, as a promising pyrite flotation inhibitor for the flotation separation of jamesonite and pyrite.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109220"},"PeriodicalIF":4.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption removal of Entrapped LIX 984N from acidic copper sulfate electrolyte using Nano-Porous silica aerogel","authors":"Ali Mohebbi,&nbsp;Amin Abolghasemi Mahani,&nbsp;Fatemeh Shafiizadeh","doi":"10.1016/j.mineng.2025.109211","DOIUrl":"10.1016/j.mineng.2025.109211","url":null,"abstract":"<div><div>Entrapment of organic solvents in the aqueous phase is the main drawback of hydrometallurgical extraction of copper, which leads to lower quality of the produced cathodes in the electrowinning (EW) process. To address this challenge, a synthesized hydrophobic nano-porous silica aerogel was utilized to selectively eliminate the organic solvent in the ppm range, namely commercial LIX984N (a mixture of 5-nonyl salicylaldoxime (C₁₆H₂₅NO₂) and 2-hydroxy-5-nonyl acetophenone (C₁₄H₁₃NO₂) at the same volume, which is diluted in kerosene) from the acidic copper sulfate electrolyte. The effects of adsorbent characteristics and process parameters on the adsorption performance of the organic solvent were investigated and discussed in detail. The optimum conditions of the adsorption process were also identified using the response surface methodology (RSM) based on central composite design (CCD). ANOVA analysis revealed a linear-quadratic model for organic solvent elimination, with significant adsorption factors including contact time, initial organic solvent concentration, and sol pH. A second-order model was proposed to predict the adsorption behavior of organic solvent using silica aerogel, and the optimized process parameters, including contact time, sol pH, and initial concentration of adsorbate, were obtained 120 min, pH = 4, and 20 ppm, respectively. The efficiency of organic solvent removal using the synthesized hydrophobic nano-porous silica aerogel was obtained by about 90 %.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109211"},"PeriodicalIF":4.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flowsheet development for the selective flotation of lepidolite from the Beauvoir granite from mineralogical insights","authors":"C. Korbel ,&nbsp;B. Demeusy ,&nbsp;Z.S. Kahou ,&nbsp;I.V. Filippova ,&nbsp;Q. Dehaine ,&nbsp;L.O. Filippov","doi":"10.1016/j.mineng.2025.109207","DOIUrl":"10.1016/j.mineng.2025.109207","url":null,"abstract":"<div><div>This paper presents the results of a preliminary study aiming at developing a flowsheet to recover lithium hosted in lepidolite and potential metallic by-products from the Beauvoir rare metal granite (Allier, France). One of the main challenges with such unconventional lithium deposits is the different liberation mesh sizes between the coarse-grained lepidolite (∼300 µm) and the finer-grained (∼100 µm) by-products bearing minerals, namely cassiterite (Sn), columbite (Nb), tantalite and microlite (Ta). A beneficiation flowsheet starting by lepidolite flotation was developed, followed by gravity concentration through Falcon centrifugal separation to recover all by-products in a bulk heavy-minerals concentrate. All by-products behaviours were followed using the most enriched one in the granite, namely cassiterite. To reach an optimal liberation of lepidolite, a theoretical mesh was estimated, both based on grain size distribution (GSD) calculated on thin sections and on automated mineralogy carried out on samples grounded at distinct top sizes (−500 µm, −355 µm, − 250 µm and −177 µm). Results suggest that lepidolite can be effectively recovered using froth flotation with 78 % of lepidolite recovered with a concentrate containing 50 % of lepidolite. However, while most by-products bearing minerals report to the tailings during this flotation step, half of the cassiterite is recovered in the lepidolite concentrate for the finest size ranges (10–177 µm). Such an issue likely stems from the significant mineral association between lepidolite and cassiterite identified in this study trough SEM and automated mineralogy methods. Therefore, these results suggest that, to optimize cassiterite and other by-products recovery from lepidolite-bearing rare metal granites, gravity concentration should be conducted first, with an intermediate feed size range (here −280 or −300 µm) to ensure the liberation of lepidolite while improving the recovery of all by-products.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109207"},"PeriodicalIF":4.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of hydrogen pre-reduction on the carbon-reducibility of pelletised UG2 chromite","authors":"M.S. Ernst ,&nbsp;M. Tangstad ,&nbsp;J.P. Beukes ,&nbsp;E. Ringdalen ,&nbsp;S.P. Du Preez","doi":"10.1016/j.mineng.2025.109221","DOIUrl":"10.1016/j.mineng.2025.109221","url":null,"abstract":"<div><div>This study investigated the incorporation of hydrogen (H₂) as a partial replacement of carbon (C) during ferrochrome (FeCr) production. Chromite was subjected to H₂-reduction to metallise its iron (Fe) −oxide content, followed by the removal of the metallised Fe by acid leaching. Hereafter, the chromium (Cr) −oxide rich ore was subjected to C-reduction. During H₂-reduction, 64.3 % ± 6.1 % of Fe-oxides could be metallise, whereas C-reduction metallised the remaining Fe-oxides, as well as the Cr-oxide constituency. The C-reduction at 1300 °C resulted in near-complete metallisation of both the Fe- and Cr-oxide constituencies. By following this route, C emissions were reduced by approximately 16 %. It was further determined the process followed a shrinking core model. This model was confirmed by sub-surface microscopy, which highlighted the formation of a metallic layer at the chromite particle surface. This layer formation was evident during both H₂- and C-reduction. It was also found that during the implemented Fe removal process that decrepitation of the H₂-treated ore occurred. Mineralogical analysis of the H₂-reduced and leached chromite suggests the formation of an eskolaite-type phase. Subsequent removal of the metallised Cr resulted in a MgAl₂O₄ spinel-type phase, which suggests that the majority of Fe and Cr were removed. These findings provide comprehensive insights into the chemical, physical, and mineralogical transformations of chromite during reduction and leaching, offering valuable implications for the decarburisation of FeCr production.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109221"},"PeriodicalIF":4.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Slag-copper matte equilibria in CaO modified Fe-O-Al2O3-SiO2 slags at fixed p(O2), p(S2), p(SO2), and 1200 °C for mixed concentrate-WEEE feed","authors":"Miao Tian ,&nbsp;Lassi Klemettinen ,&nbsp;Min Chen ,&nbsp;Pekka Taskinen ,&nbsp;Hugh O’Brien ,&nbsp;Daniel Lindberg","doi":"10.1016/j.mineng.2025.109213","DOIUrl":"10.1016/j.mineng.2025.109213","url":null,"abstract":"<div><div>Lime modification of alumina-bearing iron silicate slags in copper matte production was studied at 1200 °C. The experimental p(SO₂) and p(O₂) conditions were fixed to produce about 60 wt% Cu matte grade. The behaviour of the slag and matte, containing trace elements silver, indium, lead, and tin, was studied as a function of lime concentration in the slag (2–––11 wt% CaO). Lime modification had a clear effect on the chemical dissolution of copper in the slag, and it also clearly decreased the deportment of silver and indium in the slag. The deportments of copper and the trace elements between the slag and magnetite (‘spinel’) phase were measured by electron probe microanalysis and laser ablation-ICP-mass spectrometry. The obtained results imply that a reductive slag cleaning technology should be employed at smelters treating high-silver feeds, such as WEEE (waste electric and electronic equipment). As indicated by the significant volatilization of many of the studied trace elements during the experiments, flue dust treatment is essential in smelters using feed mixtures with volatile elements, such as indium, lead, and tin.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"225 ","pages":"Article 109213"},"PeriodicalIF":4.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}