Leiming Wang , Liang Cheng , Shenghua Yin , Wei Chen , Hongjie Li , Shuo Li , Chao Zhang
{"title":"不同浸出温度下砂岩铀矿石孔隙结构演化及分形特征","authors":"Leiming Wang , Liang Cheng , Shenghua Yin , Wei Chen , Hongjie Li , Shuo Li , Chao Zhang","doi":"10.1016/j.powtec.2025.120713","DOIUrl":null,"url":null,"abstract":"<div><div>In this paper, the evolution and fractal characteristics of the pore structure of sandstone uranium ore after leaching under various temperature conditions were systematically studied mainly by using mercury intrusion porosimetry(MIP) method, low-temperature nitrogen adsorption(LTNA) method and scanning electron microscopy(SEM). The results show that the nitrogen adsorption and mercury intake of the ore under 40 °C leaching conditions are the largest, the volume of the pores is more prominent, and the pore structure is more developed compared with other leaching conditions. Calculating the fractal dimension through various models shows that the fractal dimension of the leached ore under certain temperature conditions is smaller than that under room temperature conditions, indicating that the ore's complexity decreases when leaching the ore under certain temperature conditions. The pore complexity of the ore is the lowest under the leaching condition of 40 °C, which is favorable for the flow of the solution. This study helps to understand the impact of temperature on ore pore structure during in-situ leaching, which is crucial for optimizing the process, improving uranium recovery, and ensuring sustainable resource use.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"454 ","pages":"Article 120713"},"PeriodicalIF":5.5000,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pore structure evolution and fractal characteristics of sandstone uranium ore under different leaching temperatures\",\"authors\":\"Leiming Wang , Liang Cheng , Shenghua Yin , Wei Chen , Hongjie Li , Shuo Li , Chao Zhang\",\"doi\":\"10.1016/j.powtec.2025.120713\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this paper, the evolution and fractal characteristics of the pore structure of sandstone uranium ore after leaching under various temperature conditions were systematically studied mainly by using mercury intrusion porosimetry(MIP) method, low-temperature nitrogen adsorption(LTNA) method and scanning electron microscopy(SEM). The results show that the nitrogen adsorption and mercury intake of the ore under 40 °C leaching conditions are the largest, the volume of the pores is more prominent, and the pore structure is more developed compared with other leaching conditions. Calculating the fractal dimension through various models shows that the fractal dimension of the leached ore under certain temperature conditions is smaller than that under room temperature conditions, indicating that the ore's complexity decreases when leaching the ore under certain temperature conditions. The pore complexity of the ore is the lowest under the leaching condition of 40 °C, which is favorable for the flow of the solution. This study helps to understand the impact of temperature on ore pore structure during in-situ leaching, which is crucial for optimizing the process, improving uranium recovery, and ensuring sustainable resource use.</div></div>\",\"PeriodicalId\":407,\"journal\":{\"name\":\"Powder Technology\",\"volume\":\"454 \",\"pages\":\"Article 120713\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-03-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Powder Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0032591025001081\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/30 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025001081","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/30 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Pore structure evolution and fractal characteristics of sandstone uranium ore under different leaching temperatures
In this paper, the evolution and fractal characteristics of the pore structure of sandstone uranium ore after leaching under various temperature conditions were systematically studied mainly by using mercury intrusion porosimetry(MIP) method, low-temperature nitrogen adsorption(LTNA) method and scanning electron microscopy(SEM). The results show that the nitrogen adsorption and mercury intake of the ore under 40 °C leaching conditions are the largest, the volume of the pores is more prominent, and the pore structure is more developed compared with other leaching conditions. Calculating the fractal dimension through various models shows that the fractal dimension of the leached ore under certain temperature conditions is smaller than that under room temperature conditions, indicating that the ore's complexity decreases when leaching the ore under certain temperature conditions. The pore complexity of the ore is the lowest under the leaching condition of 40 °C, which is favorable for the flow of the solution. This study helps to understand the impact of temperature on ore pore structure during in-situ leaching, which is crucial for optimizing the process, improving uranium recovery, and ensuring sustainable resource use.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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