{"title":"铁矿流化床还原过程中结块/脱流化的机理及预防","authors":"Y. Zhong, Jintao Gao, Zhancheng Guo, Zhi Wang","doi":"10.5772/INTECHOPEN.68488","DOIUrl":null,"url":null,"abstract":"The mechanisms of agglomeration and defluidization and fluidization characteristic of iron oxide particles were investigated based on the theory of surface diffusion, interface reaction, surface nano/microeffect, and phase transformation. Moreover, a mathematical model was developed to predict the high-temperature defluidization behavior by the force-balance and plastic-viscous flow mechanism, and the fluidization phase diagram was obtained. On these bases, a control method of defluidization and its inhibition mechanism were proposed. As a result, the theoretical system of agglomeration/defluidization in the gas-solid fluidization was developed, and thus afforded theory support and techno-logical bases for the solution of defluidization in industrial fluidized-bed reactors.","PeriodicalId":14641,"journal":{"name":"Iron Ores and Iron Oxide Materials","volume":"17 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Mechanism and Prevention of Agglomeration/Defluidization during Fluidized-Bed Reduction of Iron Ore\",\"authors\":\"Y. Zhong, Jintao Gao, Zhancheng Guo, Zhi Wang\",\"doi\":\"10.5772/INTECHOPEN.68488\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The mechanisms of agglomeration and defluidization and fluidization characteristic of iron oxide particles were investigated based on the theory of surface diffusion, interface reaction, surface nano/microeffect, and phase transformation. Moreover, a mathematical model was developed to predict the high-temperature defluidization behavior by the force-balance and plastic-viscous flow mechanism, and the fluidization phase diagram was obtained. On these bases, a control method of defluidization and its inhibition mechanism were proposed. As a result, the theoretical system of agglomeration/defluidization in the gas-solid fluidization was developed, and thus afforded theory support and techno-logical bases for the solution of defluidization in industrial fluidized-bed reactors.\",\"PeriodicalId\":14641,\"journal\":{\"name\":\"Iron Ores and Iron Oxide Materials\",\"volume\":\"17 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-12-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Iron Ores and Iron Oxide Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.5772/INTECHOPEN.68488\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iron Ores and Iron Oxide Materials","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5772/INTECHOPEN.68488","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Mechanism and Prevention of Agglomeration/Defluidization during Fluidized-Bed Reduction of Iron Ore
The mechanisms of agglomeration and defluidization and fluidization characteristic of iron oxide particles were investigated based on the theory of surface diffusion, interface reaction, surface nano/microeffect, and phase transformation. Moreover, a mathematical model was developed to predict the high-temperature defluidization behavior by the force-balance and plastic-viscous flow mechanism, and the fluidization phase diagram was obtained. On these bases, a control method of defluidization and its inhibition mechanism were proposed. As a result, the theoretical system of agglomeration/defluidization in the gas-solid fluidization was developed, and thus afforded theory support and techno-logical bases for the solution of defluidization in industrial fluidized-bed reactors.
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