發(fā)布時(shí)間：2018-05-08 17:11

  本文選題：干法造粒制粉 + 歐拉-歐拉雙流體模型　； 參考：《人工晶體學(xué)報(bào)》2017年08期

【摘要】：為研究陶瓷干法造粒制粉過(guò)程坯料顆粒成形與霧化液含量的關(guān)系,基于歐拉-歐拉雙流體模型模擬干法造粒制粉過(guò)程坯料顆粒與霧化液混合過(guò)程,同時(shí)對(duì)坯料顆粒流動(dòng)性、顆粒級(jí)配及粗糙度進(jìn)行實(shí)驗(yàn)分析,驗(yàn)證數(shù)值模擬結(jié)果正確性。仿真結(jié)果表明:當(dāng)霧化液含量分別為100 m L、200 m L、300 m L時(shí),坯料顆粒在造粒室內(nèi)的分散性無(wú)明顯差異,團(tuán)聚現(xiàn)象不明顯;當(dāng)霧化液含量分別為400 m L、500 m L時(shí),坯料顆粒在造粒室內(nèi)的分散性有明顯變化,團(tuán)聚現(xiàn)象顯著。實(shí)驗(yàn)結(jié)果表明:當(dāng)霧化液含量分別為100 m L、200 m L、300 m L、400 m L、500 m L時(shí),坯料顆粒的流動(dòng)性指數(shù)依次為63.5%、83.0%、90.0%、77.0%、61.0%,有效坯料顆粒百分比依次為72%、83%、90%、82%、65%,粗糙度系數(shù)平均值依次為1.38、1.43、1.26、1.49、1.57。綜合分析說(shuō)明:數(shù)值仿真與實(shí)驗(yàn)結(jié)果基本相吻合,造粒過(guò)程中霧化液含量為300 m L時(shí),干法造粒制粉過(guò)程造粒室內(nèi)坯料顆粒的分散性較好,且基本無(wú)團(tuán)聚現(xiàn)象;坯料顆粒的流動(dòng)性最佳、顆粒級(jí)配最均勻、粗糙度整體最優(yōu),即造粒效果最好。
[Abstract]:In order to study the relationship between billet particle forming and atomizing liquid content during dry granulation of ceramic powder, the mixing process of billet particle and atomizing liquid during dry granulation process was simulated based on Euler-Euler dual fluid model, and the fluidity of billet particle was also studied. Particle gradation and roughness were analyzed experimentally to verify the correctness of the numerical simulation results. The simulation results show that there is no obvious difference in dispersion and agglomeration of billet particles in the granulation chamber when the atomization liquid content is 100 mL / L and 200 mL / L respectively, and when the atomizing liquid content is 400 mL / L, the agglomeration phenomenon is not obvious. The dispersion and agglomeration of billet particles in granulation chamber are obvious. The experimental results show that the fluidity index of the billet grain is 63.5%, 83.0% and 77.0% respectively when the atomization liquid content is 100 mL / 200 m / L and 400 m / L / L, respectively, and the percentage of effective blank particles is 728390,822665mm, and the average roughness coefficient is 1.38 / 1.431.261.49m / 1.57. The comprehensive analysis shows that the numerical simulation is basically consistent with the experimental results. When the atomization liquid content is 300 mL, the dispersion of the indoor billets in the dry granulation process is better, and there is basically no agglomeration. The flowability of the billet is the best, the particle gradation is the most uniform, and the roughness is the best, that is, the granulation effect is the best.
【作者單位】： 景德鎮(zhèn)陶瓷大學(xué)機(jī)械電子工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51365018) 江西省高等學(xué)�？萍悸涞赜�(jì)劃(KJLD14074) 江西省科技支撐計(jì)劃(20151BBE50041)
【分類(lèi)號(hào)】：TQ174.6
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本文編號(hào)：1862278