{"title":"New technology for preparing high sphericity iron powder by hydrogen reduction method","authors":"Min Gan, Yun-can Cao, Hao-rui Li, Xiao-hui Fan, Xing-wei Li, Hua-jiang Wei, Zhong-zheng Huang, Xiao-wei Si, Lin-cheng Liu, Zhi-yun Ji, Zeng-qing Sun, En-di Guo","doi":"10.1016/j.powtec.2025.120859","DOIUrl":null,"url":null,"abstract":"<div><div>Spherical iron powder is a crucial raw material for advanced manufacturing. In this study, it is prepared through ultrafine milling, spray granulation, and hydrogen reduction process with ultra-purity iron concentrate as the raw material. First, we study the effect of reduction temperature on the surface morphology and internal sintering degree of spherical iron powder. Furthermore, we study the variation law of some fundamental performance in different reduction temperatures, such as apparent density, flow rate, spheroidization rate, etc. The results show that the comprehensive performance of iron powder obtained at 750 °C is optimal. Finally, the factors affecting the formation of iron whiskers during the reduction process are revealed. By increasing the reduction rate, we obtained spherical iron powder without iron whiskers on the surface using an experimental atmosphere of 1.0 L/min H<sub>2</sub> and 0.3 L/min Ar, and the mean sphericity is calculated to be 0.9619.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"457 ","pages":"Article 120859"},"PeriodicalIF":4.6000,"publicationDate":"2025-02-28","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/S0032591025002542","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Spherical iron powder is a crucial raw material for advanced manufacturing. In this study, it is prepared through ultrafine milling, spray granulation, and hydrogen reduction process with ultra-purity iron concentrate as the raw material. First, we study the effect of reduction temperature on the surface morphology and internal sintering degree of spherical iron powder. Furthermore, we study the variation law of some fundamental performance in different reduction temperatures, such as apparent density, flow rate, spheroidization rate, etc. The results show that the comprehensive performance of iron powder obtained at 750 °C is optimal. Finally, the factors affecting the formation of iron whiskers during the reduction process are revealed. By increasing the reduction rate, we obtained spherical iron powder without iron whiskers on the surface using an experimental atmosphere of 1.0 L/min H2 and 0.3 L/min Ar, and the mean sphericity is calculated to be 0.9619.
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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