Journal of Sustainable Metallurgy最新文献_第8页

Study on Pretreatment and Leaching Behaviors of Spent Fluid Catalytic Cracking Catalysts 流体催化裂化废催化剂的预处理和浸出行为研究

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-09 DOI: 10.1007/s40831-024-00831-4

Mingshuai Wu, Wenbo Cheng, Fengshan Yu, Maolin Tian, Xueli Wang, Yongjie Bu, Jiawei Wen, Guoyong Huang

{"title":"Study on Pretreatment and Leaching Behaviors of Spent Fluid Catalytic Cracking Catalysts","authors":"Mingshuai Wu, Wenbo Cheng, Fengshan Yu, Maolin Tian, Xueli Wang, Yongjie Bu, Jiawei Wen, Guoyong Huang","doi":"10.1007/s40831-024-00831-4","DOIUrl":"https://doi.org/10.1007/s40831-024-00831-4","url":null,"abstract":"<p>The reclamation of exhausted Fluid Catalytic Cracking (FCC) catalysts has attracted considerable interest. However, the leaching rates of valuable metals in waste can be influenced by the pretreatment and calcination process. This study focuses on investigating the impact of pretreatment temperature on the metal-leaching process of spent FCC catalysts. After calcination at 1200 °C, the Al<sub>2</sub>O<sub>3</sub> carrier transformed from γ-Al<sub>2</sub>O<sub>3</sub> to α-Al<sub>2</sub>O<sub>3</sub> with a denser structure. Subsequently, the valuable metals react with the carrier to form regular acid salts, which are averse to the leaching process. While the pretreatment roasting of spent FCC catalysts at 600 °C could not only remove the surface impurities effectively but also keep the original γ-Al<sub>2</sub>O<sub>3</sub> structure, promoting the leaching process. Finally, the kinetic model is studied with the aim of achieving the high-efficiency leaching of Ni in spent FCC catalysts. The leaching kinetics model of Ni accords with the ash diffusion model, and the reaction activation energy is 53.05 kJ/mol, in the temperature range of 60–90 °C, sulfuric acid concentration of 2 mol/L, particle size of less than 200 mesh (75μm). Specifically, for spent FCC catalysts, pretreatment at high temperatures is not conducive to subsequent leaching, while pretreatment at low temperatures is conducive to subsequent leaching of valuable metals.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"22 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of the Leaching Kinetics for Uranium Recovery from a Boltwoodite Ore as Emerging Solution to Nigerian Power Sector 优化浸出动力学，从勃尔特伍德矿石中回收铀，作为尼日利亚电力部门的新兴解决方案

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-08 DOI: 10.1007/s40831-024-00834-1

Mustapha A. Raji, Alafara A. Baba, Abhilash, Ajeet Gangwar, Jude O. Majasan

{"title":"Optimization of the Leaching Kinetics for Uranium Recovery from a Boltwoodite Ore as Emerging Solution to Nigerian Power Sector","authors":"Mustapha A. Raji, Alafara A. Baba, Abhilash, Ajeet Gangwar, Jude O. Majasan","doi":"10.1007/s40831-024-00834-1","DOIUrl":"https://doi.org/10.1007/s40831-024-00834-1","url":null,"abstract":"<p>The continuous rise of the population <i>cum</i> standard of living has resulted in Nigerians looking for a profound solution to the fast-growing demand for electrical energy with sustainability concerns including greenhouse gas emissions limitation. Thus, the investigation of uranium leaching kinetics and thermodynamics has become one of the most crucial topics in leach technology, where many distinct results have been obtained. In this study, the influence of sulfuric acid concentration, reaction temperature, solid-to-liquid ratio, and leaching time were all investigated. At established experimental conditions (2.5 mol/L H<sub>2</sub>SO<sub>4</sub>, 75 °C, 75 µm), the uranium ore dissolution efficiency recorded was 89.1% within 120 min. The kinetic and thermodynamic tests of the leaching process coupled with the reaction mechanism between sulfuric acid and uranium were discussed. Hence, the results confirm that the dissolution mechanism of uranium was diffusion controlled, exothermic, and spontaneous.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"128 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Review on the Preparation of Cryolite from Industry Waste Containing Fluorine 利用含氟工业废料制备冰晶石综述

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-08 DOI: 10.1007/s40831-024-00835-0

Xiaomeng Cao, Jianping Peng, Wenxiong Dong, Yifei Li, Yaowu Wang, Yuezhong Di

{"title":"Review on the Preparation of Cryolite from Industry Waste Containing Fluorine","authors":"Xiaomeng Cao, Jianping Peng, Wenxiong Dong, Yifei Li, Yaowu Wang, Yuezhong Di","doi":"10.1007/s40831-024-00835-0","DOIUrl":"https://doi.org/10.1007/s40831-024-00835-0","url":null,"abstract":"<p>Rapid development of the fluorine industry has led to mass production of fluorine-containing waste, and direct discharge of this waste will cause serious environmental pollution of water, atmosphere, soil, and so on. Recycling and treatment of fluorine-containing waste are required for environmental protection and to utilize the fluorine resources. Because of decreases in fluorite reserves and inefficient fluorine resource recovery, cryolite has become a potential resource for fluorine recovery. This paper summarizes research on the preparation of cryolite from fluorine-containing substances produced in various industries, mechanisms of contamination under different conditions, and commonly used methods for controlling the product particle size. The results indicate that cryolite prepared in acidic or weakly alkaline solutions with a fluorine–aluminum molar ratio of 5.4–6.6 has high purity. The particle size of the cryolite increases with the addition of a seed during precipitation. This review provides insight for future production of cryolite with regard to purity problems and particle size control.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"21 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Simulation of Innovative Slag Splashing Process in a Converter Using a Nozzle-Twisted Oxygen Lance 使用喷嘴-缠绕氧枪对转炉中的创新溅渣过程进行数值模拟

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-08 DOI: 10.1007/s40831-024-00836-z

Han Zhang, Ke Liu, Hongxin Zhao, Yue Tian, Jianye Liang, Zhangfu Yuan

{"title":"Numerical Simulation of Innovative Slag Splashing Process in a Converter Using a Nozzle-Twisted Oxygen Lance","authors":"Han Zhang, Ke Liu, Hongxin Zhao, Yue Tian, Jianye Liang, Zhangfu Yuan","doi":"10.1007/s40831-024-00836-z","DOIUrl":"https://doi.org/10.1007/s40831-024-00836-z","url":null,"abstract":"<p>The innovative slag splashing technology can significantly reduce CO<sub>2</sub> emissions in the steel industry. However, conventional oxygen lances are no longer sufficient due to the gas-slag reactions involved. Hence, the feasibility of applying nozzle-twisted oxygen lances to the innovative slag splashing process was investigated in this work. Numerical simulation was employed to compare the CO<sub>2</sub> jet, its impact characteristics on the slag, and the slag splashing performance of both the nozzle-twisted and conventional oxygen lances. It was found that the nozzle-twisted jet has higher radial and tangential velocities and a more significant impact region compared with the conventional jet. Furthermore, it exhibited superior stirring capability for the melt pool, enhancing the average velocity of the slag and reducing the size of dead zones. This facilitated the mixing of carbon powder and the interfacial reaction between CO<sub>2</sub> and the slag. However, the slag splashing performance deteriorated after the oxygen lance was replaced. Fortunately, the slag still reached the vicinity of the slag line. Furthermore, the addition of bottom blowing compensated for the disadvantages, elevating the slag mass flow rate and further enhancing the stirring of the slag. Therefore, utilizing nozzle-twisted oxygen lances is feasible in this scenario.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"16 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal Red Mud Replacement Level Evaluation in Conventional Concrete Based on Fresh and Hardened Concrete Characteristics 基于新拌混凝土和硬化混凝土特性的常规混凝土最佳红泥掺量评估

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-06 DOI: 10.1007/s40831-024-00837-y

Soumyaranjan Panda, Monalin Pradhan, Saubhagya Kumar Panigrahi

{"title":"Optimal Red Mud Replacement Level Evaluation in Conventional Concrete Based on Fresh and Hardened Concrete Characteristics","authors":"Soumyaranjan Panda, Monalin Pradhan, Saubhagya Kumar Panigrahi","doi":"10.1007/s40831-024-00837-y","DOIUrl":"https://doi.org/10.1007/s40831-024-00837-y","url":null,"abstract":"<p>The global annual industrial waste production is enormous, influencing the environmental parameters affecting the whole universe. Due to rapid industrialization, cement production is increasing to meet the demand of the construction industries, harming the atmosphere and prompting scarcity of natural resources. Thus, the need for a supplementary cementitious material is essential, replacing cement either partially or completely. In the current investigation, red mud, which has some cementitious and hydraulic characteristics, is being utilized as a supplementary cementitious material and is used as a partial replacement to cement in concrete production at different percentage levels like 0% (the control concrete), 5%, 10%, 15%, 20%, and 25% with an intension to establish the optimal replacement level established on various fresh and hardened concrete characteristics. All workable mixes are subjected to physical tests (density measurement), mechanical tests (ultrasonic pulse velocity test, rebound hammer test, compressive and tensile strength test), and durability tests (acid resistance test, sulfate resistance test, and chloride resistance test). The discussions on the concrete characterization variations can be substantiated through various microstructure level tests like scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction analysis (XRD) tests. The detailed characterization tests mutually confirmed that the optimal red mud replacement level in conventional concrete is evaluated to be 15%, leading to a sustainable production evolving reasonable waste management.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"32 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seeded Precipitation of the Coarse Sodium Fluoride with High Purity for Efficient Removal of Fluoride Ion from Sodium Aluminate Solutions 种子沉淀高纯度粗粒氟化钠以高效去除铝酸钠溶液中的氟离子

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-06 DOI: 10.1007/s40831-024-00833-2

Jie Tang, Guihua Liu, Tiangui Qi, Qiusheng Zhou, Zhihong Peng, Xiaobin Li, Yilin Wang, Leiting Shen

{"title":"Seeded Precipitation of the Coarse Sodium Fluoride with High Purity for Efficient Removal of Fluoride Ion from Sodium Aluminate Solutions","authors":"Jie Tang, Guihua Liu, Tiangui Qi, Qiusheng Zhou, Zhihong Peng, Xiaobin Li, Yilin Wang, Leiting Shen","doi":"10.1007/s40831-024-00833-2","DOIUrl":"https://doi.org/10.1007/s40831-024-00833-2","url":null,"abstract":"<p>Recovering fluoride from industrial alkaline solutions will benefit the environmental protection and improve product quality. This paper presented a novel approach to fluoride recovery by precipitating the coarse NaF from sodium aluminate solution. The equilibrium concentration of fluoride ion in the sodium aluminate solution was first presented as a function of caustic soda concentration and temperature. Coarse NaF and high NaF precipitation efficiency were obtained by the fine particle agglomeration under conditions of inhomogeneously distributed at weak agitation (IDWA) and the addition of activated seeds. Based on particle number calculated from the particle size distribution curves, the agglomeration rate was linearly dependent on the supersaturation of NaF in sodium aluminate solution. The agglomeration mechanism was described by the fresh ultrafine particles acting as a “binder” to agglomerate the fine particles (< 10 μm) into the coarse particles (> 30 μm). Therefore, 91.15% precipitation efficiency of NaF was achieved by adding the activated seeds, adopting the special schedule of decreasing temperature, and regulating the supersaturation under IDWA. Furthermore, about 65 μm NaF with more than 98% purity was received. These results provide a novel approach for recovering NaF from the sodium aluminate solution and benefit the green development of the alumina industry.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"16 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Industrial Ecotechnological Assessment of Lime as a Sustainable Substitute for Desulfurization of Cast Iron 石灰作为铸铁脱硫的可持续替代品的工业生态技术评估

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-06 DOI: 10.1007/s40831-024-00829-y

I. Adhiwiguna, K. Vellayadevan, Y. Tekneci, M. Walz, D. Algermissen, R. Deike

{"title":"Industrial Ecotechnological Assessment of Lime as a Sustainable Substitute for Desulfurization of Cast Iron","authors":"I. Adhiwiguna, K. Vellayadevan, Y. Tekneci, M. Walz, D. Algermissen, R. Deike","doi":"10.1007/s40831-024-00829-y","DOIUrl":"https://doi.org/10.1007/s40831-024-00829-y","url":null,"abstract":"<p>This study comprehensively assesses the ecotechnological consideration and perspective of implementing a lime-based desulfurization process in the cast iron industry to replace the utilization of magnesium partially. By adopting an injection process to introduce the lime powder into molten cast iron, this research elucidated that the new alternative concept can successfully be integrated with daily operations without any disparities in cast iron quality, as proved by the production of cast iron products with vermicular graphite. A mixture of lime powder and carbon was utilized, and it was substantiated that the aim of a sulfur content lower than 0.015% can be reliably achieved. Furthermore, an ecological analysis was also conducted to justify the possible environmental advantages. The results indicated that considering the cradle-to-gate approach, the maximum amount of CO<sub>2</sub>eq connected to the lime-based desulfurization is approximately 43 g for 1 kg of desulfurized cast iron. This amount of calculated emission is still expected to be lower than the minimum calculated emission associated with the magnesium-based process, which can reach an amount of 76 g for a similar functional unit.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"37 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Enhancing Mechanism of Na2SO4 on Mullite Decomposition and Alumina Recovery During the Vacuum Carbothermic Reduction of Coal Fly Ash Na2SO4 对煤粉灰真空碳热还原过程中莫来石分解和氧化铝回收的促进机制

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-06 DOI: 10.1007/s40831-024-00832-3

Joseph Emmanuel Nyarko-Appiah, Wenzhou Yu, Lanjiang Song, Peng Wei, Hao Chen

{"title":"The Enhancing Mechanism of Na2SO4 on Mullite Decomposition and Alumina Recovery During the Vacuum Carbothermic Reduction of Coal Fly Ash","authors":"Joseph Emmanuel Nyarko-Appiah, Wenzhou Yu, Lanjiang Song, Peng Wei, Hao Chen","doi":"10.1007/s40831-024-00832-3","DOIUrl":"https://doi.org/10.1007/s40831-024-00832-3","url":null,"abstract":"<p>The utilization of coal fly ash has been of great concern in recent years due to the growing awareness of waste recycling and environmental protection. Alumina recycling from coal fly ash is a good path to realize the state-of-the-art utilization of coal fly ash. The present work proposes a novel strategy for recovering alumina and producing Fe–Si alloy from coal fly ash employing Na<sub>2</sub>SO<sub>4</sub> as the additive. The enhancing mechanism of the Na<sub>2</sub>SO<sub>4</sub> addition on the mullite (Al<sub>6</sub>Si<sub>2</sub>O<sub>13</sub>) decomposition and alumina extraction during vacuum carbothermic reduction of coal fly ash was systematically investigated. The thermodynamic calculation results show that the theoretical decomposition temperature of mullite can be decreased from 1048 to 683 K with the assistance of Na<sub>2</sub>SO<sub>4</sub>, which means that the addition of Na<sub>2</sub>SO<sub>4</sub> can effectively eliminate the mullite phase. Furthermore, the aggregation of Fe–Si alloy particles was enhanced efficiently in the presence of Na<sub>2</sub>SO<sub>4</sub>, which was proved to be conducive to the alumina and Fe–Si alloy separation in the subsequent magnetic separation process. As the Na<sub>2</sub>SO<sub>4</sub> addition amounts changed from 0 to 12 wt% at 1423 K for 4 h, the average size of the Fe–Si alloys particle exhibited an enlargement from 21.39 to 39.94 μm, by which the recovery efficiency of alumina increased from 61.03 to 75.26% correspondingly.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"4 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and 4E Analysis of a Hybrid Air Supply System for Blast Furnaces Driven by Excess Pressure and Waste Heat Recovery 过压和余热回收驱动的高炉混合供气系统的设计和 4E 分析

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-02 DOI: 10.1007/s40831-024-00821-6

Xiaoqing Fang, Wenqiang Sun, Chunyou Zuo, Menglin Liu

{"title":"Design and 4E Analysis of a Hybrid Air Supply System for Blast Furnaces Driven by Excess Pressure and Waste Heat Recovery","authors":"Xiaoqing Fang, Wenqiang Sun, Chunyou Zuo, Menglin Liu","doi":"10.1007/s40831-024-00821-6","DOIUrl":"https://doi.org/10.1007/s40831-024-00821-6","url":null,"abstract":"<p>In pursuit of energy-efficient solutions for air supply systems in steel plants, this study introduces a novel hybrid air supply system, amalgamating Waste Heat Recovery (WHR) and Excess Pressure Recovery (EPR) units. The system integrates an expander in the WHR unit and a gas turbine in the EPR unit, coaxially aligning them with the blower. A 4E model is established to evaluate the system’s energy, exergy, economic, and environmental performance. Results highlight R236ea as optimal, boasting a net power output of 1072.07 kW and an exergy efficiency of 35.62%. The WHR and EPR units contribute 73.36 and 26.64%, respectively, resulting in an electricity saving of 8.38% for the blast furnace. The minimum cost per unit of net power output with R236ea is 0.0229 $/kWh, with a dynamic payback period of 1.66 years. Compared to traditional electro-driven systems, the proposed system yields a 14.23% total cost saving. R1233zd(E) facilitates the largest net emission reduction at 202.86 kt per year, operating at an evaporation temperature of 84.3 °C. This hybrid air supply system demonstrates significant practical value, offering simultaneous benefits in energy savings, cost reduction, and emission reduction, suggesting a promising avenue for future research and development in air supply systems.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"21 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140828026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Particle Size and Starch Gelatinization on the Mechanical and Metallurgical Performance of Jarosite Plus Blast Furnace Sludge Self-Reducing Briquettes 粒度和淀粉糊化对 Jarosite Plus 高炉污泥自还原砖机械和冶金性能的影响

IF 2.4 3区材料科学

Journal of Sustainable Metallurgy Pub Date : 2024-05-01 DOI: 10.1007/s40831-024-00825-2

G. Dall’Osto, D. Mombelli, V. Trombetta, C. Mapelli

{"title":"Effect of Particle Size and Starch Gelatinization on the Mechanical and Metallurgical Performance of Jarosite Plus Blast Furnace Sludge Self-Reducing Briquettes","authors":"G. Dall’Osto, D. Mombelli, V. Trombetta, C. Mapelli","doi":"10.1007/s40831-024-00825-2","DOIUrl":"https://doi.org/10.1007/s40831-024-00825-2","url":null,"abstract":"<p>Jarosite and blast furnace sludge (BFS) are two of the main wastes from hydrometallurgical zinc production and iron production by blast furnace, respectively. Jarosite is a hazardous material that can, however, be reused in the steel industry after the recovering of the iron contained within it through carbothermal reduction in which BFS is exploited as a reducing agent. Yet, both wastes have a powdery nature that makes it necessary to agglomerate them for industrial use. On the other hand, despite the advantages of producing a self-reducing product, the particle size of the starting powders and the level of gelatinization of the binder could play a crucial role on the mechanical and metallurgical performance and, consequently, on the industrial applicability of the briquettes. Accordingly, two powder particle sizes (very fine sand vs. coarse silt) and three degree of corn starch binder retrogradation (10%, 30% and non-gelatinized starch) were used to produce briquettes, and their influence was studied by experimental and statistical investigation. The results showed that gelatinization plays the main role on the mechanical properties of briquettes, while particle size affects both density and reduction behavior; in particular, although all the mixtures were able to recover iron at 950 °C the most optimal mixture were obtained by using a granulometry of 63–125 µm for jarosite and less than 63 µm for BFS, while the local maximum of mechanical performance was obtained for a 30% starch retrogradation level.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"45 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140828028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0