摘要
静态混合器对反应物料具有良好的径向混合作用，可使反应物料在较短时间内尽可能达到微观混合，有利于制备一次粒径较小的超细微分。文章将Ｋｅｎｉｃｓ型静态混合器应用于ＺｒＯ２ 纳米晶微粉的制备，研究了物料流在其中的流动状态，并研究了静态混合器单元数、反应物浓度、流量等对粉末性能的影响。结果表明：静态混合器可消除反应器内物料在径向上的浓度、温度等差别，物料在其中的流动状态近似于活塞流；反应物浓度越大，粉末的一次粒径越小，但团聚粒径变大；而增大反应物流量则有利于生成粒径较小的粒子。
With static mixer reaction masses can be well mixed in radial direction so that they can be micromixed as quickly as possible,which is profitable to the preparation of ultrafine powder.In this paper,Kenics static mixer was used to prepare ZrO 2 nanocrystalline powder.The feature of the static mixer was discussed, the effects of the numbers of mixture element,the concentration of the reactants and the rate of flow on the powder′s behaviour were analyzed.The results showed that the differences of the concentration and temperature in radial direction of the flow can be eliminated in static mixer.The state of the flow was approximate to plug flow.Increasing of the concentration of the reactants reduced the critical crystal size of the powder,but agglomerate size became larger.When the rate of flow was larger,the partical size was smaller.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
1999年第5期22-25,共4页
Journal of Hefei University of Technology：Natural Science
基金
安徽省"九五"重点科研项目
