{"title":"应用数值模拟方法预测功率密度对微波辅助破碎的影响","authors":"D.N Whittles, S.W Kingman, D.J Reddish","doi":"10.1016/S0301-7516(02)00049-2","DOIUrl":null,"url":null,"abstract":"<div><p><span><span>The influence of electric field strength on the microwave treatment of ore is elucidated. The ore consisted of a microwave-absorbing mineral in a low-absorbing matrix, and the influence of electric field strength was assessed by numerical simulation. Simulations were undertaken using finite difference modelling techniques for a theoretical 15×30 mm sample of </span>calcite host rock containing 10 vol.%, 1-mm</span><sup>2</sup><span> particles of pyrite. The simulations modelled the microwave heating, thermal conduction, expansion, thermally induced fracturing and strain softening<span> and, finally, uniaxial compressive strength to predict the effect of microwave heating on the strength of the ore material. Standard correlations were then used to develop specific comminution energy verses </span></span><em>t</em><sub>10</sub> relationships for the treated and nontreated samples. It is shown that microwave power density is vital to the fracturing of the rock, and it is suggested that by utilising high power densities, the microwave fracturing of rock to reduce grinding energy requirements may be economically viable.</p></div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0301-7516(02)00049-2","citationCount":"153","resultStr":"{\"title\":\"Application of numerical modelling for prediction of the influence of power density on microwave-assisted breakage\",\"authors\":\"D.N Whittles, S.W Kingman, D.J Reddish\",\"doi\":\"10.1016/S0301-7516(02)00049-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span><span>The influence of electric field strength on the microwave treatment of ore is elucidated. The ore consisted of a microwave-absorbing mineral in a low-absorbing matrix, and the influence of electric field strength was assessed by numerical simulation. Simulations were undertaken using finite difference modelling techniques for a theoretical 15×30 mm sample of </span>calcite host rock containing 10 vol.%, 1-mm</span><sup>2</sup><span> particles of pyrite. The simulations modelled the microwave heating, thermal conduction, expansion, thermally induced fracturing and strain softening<span> and, finally, uniaxial compressive strength to predict the effect of microwave heating on the strength of the ore material. Standard correlations were then used to develop specific comminution energy verses </span></span><em>t</em><sub>10</sub> relationships for the treated and nontreated samples. It is shown that microwave power density is vital to the fracturing of the rock, and it is suggested that by utilising high power densities, the microwave fracturing of rock to reduce grinding energy requirements may be economically viable.</p></div>\",\"PeriodicalId\":14022,\"journal\":{\"name\":\"International Journal of Mineral Processing\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2003-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0301-7516(02)00049-2\",\"citationCount\":\"153\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Mineral Processing\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0301751602000492\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Earth and Planetary Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mineral Processing","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301751602000492","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}
Application of numerical modelling for prediction of the influence of power density on microwave-assisted breakage
The influence of electric field strength on the microwave treatment of ore is elucidated. The ore consisted of a microwave-absorbing mineral in a low-absorbing matrix, and the influence of electric field strength was assessed by numerical simulation. Simulations were undertaken using finite difference modelling techniques for a theoretical 15×30 mm sample of calcite host rock containing 10 vol.%, 1-mm2 particles of pyrite. The simulations modelled the microwave heating, thermal conduction, expansion, thermally induced fracturing and strain softening and, finally, uniaxial compressive strength to predict the effect of microwave heating on the strength of the ore material. Standard correlations were then used to develop specific comminution energy verses t10 relationships for the treated and nontreated samples. It is shown that microwave power density is vital to the fracturing of the rock, and it is suggested that by utilising high power densities, the microwave fracturing of rock to reduce grinding energy requirements may be economically viable.
期刊介绍：
International Journal of Mineral Processing has been discontinued as of the end of 2017, due to the merger with Minerals Engineering.
The International Journal of Mineral Processing covers aspects of the processing of mineral resources such as: Metallic and non-metallic ores, coals, and secondary resources. Topics dealt with include: Geometallurgy, comminution, sizing, classification (in air and water), gravity concentration, flotation, electric and magnetic separation, thickening, filtering, drying, and (bio)hydrometallurgy (when applied to low-grade raw materials), control and automation, waste treatment and disposal. In addition to research papers, the journal publishes review articles, technical notes, and letters to the editor..
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
